diff --git a/creating-erc20-token/.gitignore b/creating-erc20-token/.gitignore
new file mode 100644
index 0000000..b512c09
--- /dev/null
+++ b/creating-erc20-token/.gitignore
@@ -0,0 +1 @@
+node_modules
\ No newline at end of file
diff --git a/creating-erc20-token/README.md b/creating-erc20-token/README.md
new file mode 100644
index 0000000..28b9df7
--- /dev/null
+++ b/creating-erc20-token/README.md
@@ -0,0 +1,27 @@
+# How to creating ERC20 token
+
+In recent years, the ERC20 token specification has become the defacto standard for Ethereum tokens. In other words, most Ethereum contracts out there today are ERC20-compliant. In this example you will learn how you can create your own Ethereum token by using [Truffle](https://www.trufflesuite.com/), [Ganache](https://www.trufflesuite.com/ganache) and [Openzeppelin](https://openzeppelin.com/) library.
+
+<br>
+
+### Step 1: Step The Project Directory
+First of all we'll create a new project directory. Inside the root directory run the following commands:
+```sh 
+npm init -y
+```
+```sh 
+npm i -g truffle
+```
+```sh 
+npm i @openzeppelin/contracts
+```
+
+and then install [Ganache](https://www.trufflesuite.com/ganache) UI tool.
+
+<br>
+
+### Step 2: Initialize a Truffle Project
+```sh 
+truffle init
+```
+
diff --git a/creating-erc20-token/build/contracts/Context.json b/creating-erc20-token/build/contracts/Context.json
new file mode 100644
index 0000000..0f1c41c
--- /dev/null
+++ b/creating-erc20-token/build/contracts/Context.json
@@ -0,0 +1,506 @@
+{
+  "contractName": "Context",
+  "abi": [],
+  "metadata": "{\"compiler\":{\"version\":\"0.8.7+commit.e28d00a7\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Provides information about the current execution context, including the sender of the transaction and its data. While these are generally available via msg.sender and msg.data, they should not be accessed in such a direct manner, since when dealing with meta-transactions the account sending and paying for execution may not be the actual sender (as far as an application is concerned). This contract is only required for intermediate, library-like contracts.\",\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"project:/node_modules/@openzeppelin/contracts/utils/Context.sol\":\"Context\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"project:/node_modules/@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0x90565a39ae45c80f0468dc96c7b20d0afc3055f344c8203a0c9258239f350b9f\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://26e8b38a7ac8e7b4463af00cf7fff1bf48ae9875765bf4f7751e100124d0bc8c\",\"dweb:/ipfs/QmWcsmkVr24xmmjfnBQZoemFniXjj3vwT78Cz6uqZW1Hux\"]}},\"version\":1}",
+  "bytecode": "0x",
+  "deployedBytecode": "0x",
+  "immutableReferences": {},
+  "generatedSources": [],
+  "deployedGeneratedSources": [],
+  "sourceMap": "",
+  "deployedSourceMap": "",
+  "source": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n    function _msgSender() internal view virtual returns (address) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes calldata) {\n        return msg.data;\n    }\n}\n",
+  "sourcePath": "D:\\Block-Chain\\defi-dapps-solidity-smart-contracts\\creating-erc20-token\\node_modules\\@openzeppelin\\contracts\\utils\\Context.sol",
+  "ast": {
+    "absolutePath": "project:/node_modules/@openzeppelin/contracts/utils/Context.sol",
+    "exportedSymbols": {
+      "Context": [
+        695
+      ]
+    },
+    "id": 696,
+    "license": "MIT",
+    "nodeType": "SourceUnit",
+    "nodes": [
+      {
+        "id": 675,
+        "literals": [
+          "solidity",
+          "^",
+          "0.8",
+          ".0"
+        ],
+        "nodeType": "PragmaDirective",
+        "src": "33:23:4"
+      },
+      {
+        "abstract": true,
+        "baseContracts": [],
+        "contractDependencies": [],
+        "contractKind": "contract",
+        "documentation": {
+          "id": 676,
+          "nodeType": "StructuredDocumentation",
+          "src": "58:496:4",
+          "text": " @dev Provides information about the current execution context, including the\n sender of the transaction and its data. While these are generally available\n via msg.sender and msg.data, they should not be accessed in such a direct\n manner, since when dealing with meta-transactions the account sending and\n paying for execution may not be the actual sender (as far as an application\n is concerned).\n This contract is only required for intermediate, library-like contracts."
+        },
+        "fullyImplemented": true,
+        "id": 695,
+        "linearizedBaseContracts": [
+          695
+        ],
+        "name": "Context",
+        "nameLocation": "573:7:4",
+        "nodeType": "ContractDefinition",
+        "nodes": [
+          {
+            "body": {
+              "id": 684,
+              "nodeType": "Block",
+              "src": "649:34:4",
+              "statements": [
+                {
+                  "expression": {
+                    "expression": {
+                      "id": 681,
+                      "name": "msg",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 4294967281,
+                      "src": "666:3:4",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_magic_message",
+                        "typeString": "msg"
+                      }
+                    },
+                    "id": 682,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "lValueRequested": false,
+                    "memberName": "sender",
+                    "nodeType": "MemberAccess",
+                    "src": "666:10:4",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "functionReturnParameters": 680,
+                  "id": 683,
+                  "nodeType": "Return",
+                  "src": "659:17:4"
+                }
+              ]
+            },
+            "id": 685,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_msgSender",
+            "nameLocation": "596:10:4",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 677,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "606:2:4"
+            },
+            "returnParameters": {
+              "id": 680,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 679,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 685,
+                  "src": "640:7:4",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 678,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "640:7:4",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "639:9:4"
+            },
+            "scope": 695,
+            "src": "587:96:4",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "internal"
+          },
+          {
+            "body": {
+              "id": 693,
+              "nodeType": "Block",
+              "src": "756:32:4",
+              "statements": [
+                {
+                  "expression": {
+                    "expression": {
+                      "id": 690,
+                      "name": "msg",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 4294967281,
+                      "src": "773:3:4",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_magic_message",
+                        "typeString": "msg"
+                      }
+                    },
+                    "id": 691,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "lValueRequested": false,
+                    "memberName": "data",
+                    "nodeType": "MemberAccess",
+                    "src": "773:8:4",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_bytes_calldata_ptr",
+                      "typeString": "bytes calldata"
+                    }
+                  },
+                  "functionReturnParameters": 689,
+                  "id": 692,
+                  "nodeType": "Return",
+                  "src": "766:15:4"
+                }
+              ]
+            },
+            "id": 694,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_msgData",
+            "nameLocation": "698:8:4",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 686,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "706:2:4"
+            },
+            "returnParameters": {
+              "id": 689,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 688,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 694,
+                  "src": "740:14:4",
+                  "stateVariable": false,
+                  "storageLocation": "calldata",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_bytes_calldata_ptr",
+                    "typeString": "bytes"
+                  },
+                  "typeName": {
+                    "id": 687,
+                    "name": "bytes",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "740:5:4",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_bytes_storage_ptr",
+                      "typeString": "bytes"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "739:16:4"
+            },
+            "scope": 695,
+            "src": "689:99:4",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "internal"
+          }
+        ],
+        "scope": 696,
+        "src": "555:235:4",
+        "usedErrors": []
+      }
+    ],
+    "src": "33:758:4"
+  },
+  "legacyAST": {
+    "absolutePath": "project:/node_modules/@openzeppelin/contracts/utils/Context.sol",
+    "exportedSymbols": {
+      "Context": [
+        695
+      ]
+    },
+    "id": 696,
+    "license": "MIT",
+    "nodeType": "SourceUnit",
+    "nodes": [
+      {
+        "id": 675,
+        "literals": [
+          "solidity",
+          "^",
+          "0.8",
+          ".0"
+        ],
+        "nodeType": "PragmaDirective",
+        "src": "33:23:4"
+      },
+      {
+        "abstract": true,
+        "baseContracts": [],
+        "contractDependencies": [],
+        "contractKind": "contract",
+        "documentation": {
+          "id": 676,
+          "nodeType": "StructuredDocumentation",
+          "src": "58:496:4",
+          "text": " @dev Provides information about the current execution context, including the\n sender of the transaction and its data. While these are generally available\n via msg.sender and msg.data, they should not be accessed in such a direct\n manner, since when dealing with meta-transactions the account sending and\n paying for execution may not be the actual sender (as far as an application\n is concerned).\n This contract is only required for intermediate, library-like contracts."
+        },
+        "fullyImplemented": true,
+        "id": 695,
+        "linearizedBaseContracts": [
+          695
+        ],
+        "name": "Context",
+        "nameLocation": "573:7:4",
+        "nodeType": "ContractDefinition",
+        "nodes": [
+          {
+            "body": {
+              "id": 684,
+              "nodeType": "Block",
+              "src": "649:34:4",
+              "statements": [
+                {
+                  "expression": {
+                    "expression": {
+                      "id": 681,
+                      "name": "msg",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 4294967281,
+                      "src": "666:3:4",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_magic_message",
+                        "typeString": "msg"
+                      }
+                    },
+                    "id": 682,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "lValueRequested": false,
+                    "memberName": "sender",
+                    "nodeType": "MemberAccess",
+                    "src": "666:10:4",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "functionReturnParameters": 680,
+                  "id": 683,
+                  "nodeType": "Return",
+                  "src": "659:17:4"
+                }
+              ]
+            },
+            "id": 685,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_msgSender",
+            "nameLocation": "596:10:4",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 677,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "606:2:4"
+            },
+            "returnParameters": {
+              "id": 680,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 679,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 685,
+                  "src": "640:7:4",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 678,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "640:7:4",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "639:9:4"
+            },
+            "scope": 695,
+            "src": "587:96:4",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "internal"
+          },
+          {
+            "body": {
+              "id": 693,
+              "nodeType": "Block",
+              "src": "756:32:4",
+              "statements": [
+                {
+                  "expression": {
+                    "expression": {
+                      "id": 690,
+                      "name": "msg",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 4294967281,
+                      "src": "773:3:4",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_magic_message",
+                        "typeString": "msg"
+                      }
+                    },
+                    "id": 691,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "lValueRequested": false,
+                    "memberName": "data",
+                    "nodeType": "MemberAccess",
+                    "src": "773:8:4",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_bytes_calldata_ptr",
+                      "typeString": "bytes calldata"
+                    }
+                  },
+                  "functionReturnParameters": 689,
+                  "id": 692,
+                  "nodeType": "Return",
+                  "src": "766:15:4"
+                }
+              ]
+            },
+            "id": 694,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_msgData",
+            "nameLocation": "698:8:4",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 686,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "706:2:4"
+            },
+            "returnParameters": {
+              "id": 689,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 688,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 694,
+                  "src": "740:14:4",
+                  "stateVariable": false,
+                  "storageLocation": "calldata",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_bytes_calldata_ptr",
+                    "typeString": "bytes"
+                  },
+                  "typeName": {
+                    "id": 687,
+                    "name": "bytes",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "740:5:4",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_bytes_storage_ptr",
+                      "typeString": "bytes"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "739:16:4"
+            },
+            "scope": 695,
+            "src": "689:99:4",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "internal"
+          }
+        ],
+        "scope": 696,
+        "src": "555:235:4",
+        "usedErrors": []
+      }
+    ],
+    "src": "33:758:4"
+  },
+  "compiler": {
+    "name": "solc",
+    "version": "0.8.7+commit.e28d00a7.Emscripten.clang"
+  },
+  "networks": {},
+  "schemaVersion": "3.4.3",
+  "updatedAt": "2021-09-26T18:37:54.263Z",
+  "devdoc": {
+    "details": "Provides information about the current execution context, including the sender of the transaction and its data. While these are generally available via msg.sender and msg.data, they should not be accessed in such a direct manner, since when dealing with meta-transactions the account sending and paying for execution may not be the actual sender (as far as an application is concerned). This contract is only required for intermediate, library-like contracts.",
+    "kind": "dev",
+    "methods": {},
+    "version": 1
+  },
+  "userdoc": {
+    "kind": "user",
+    "methods": {},
+    "version": 1
+  }
+}
\ No newline at end of file
diff --git a/creating-erc20-token/build/contracts/ERC20.json b/creating-erc20-token/build/contracts/ERC20.json
new file mode 100644
index 0000000..4386260
--- /dev/null
+++ b/creating-erc20-token/build/contracts/ERC20.json
@@ -0,0 +1,22637 @@
+{
+  "contractName": "ERC20",
+  "abi": [
+    {
+      "inputs": [
+        {
+          "internalType": "string",
+          "name": "name_",
+          "type": "string"
+        },
+        {
+          "internalType": "string",
+          "name": "symbol_",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "constructor"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Approval",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Transfer",
+      "type": "event"
+    },
+    {
+      "inputs": [],
+      "name": "name",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "symbol",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "decimals",
+      "outputs": [
+        {
+          "internalType": "uint8",
+          "name": "",
+          "type": "uint8"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "totalSupply",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "account",
+          "type": "address"
+        }
+      ],
+      "name": "balanceOf",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "transfer",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        }
+      ],
+      "name": "allowance",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "approve",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "sender",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "addedValue",
+          "type": "uint256"
+        }
+      ],
+      "name": "increaseAllowance",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "subtractedValue",
+          "type": "uint256"
+        }
+      ],
+      "name": "decreaseAllowance",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    }
+  ],
+  "metadata": "{\"compiler\":{\"version\":\"0.8.7+commit.e28d00a7\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"string\",\"name\":\"name_\",\"type\":\"string\"},{\"internalType\":\"string\",\"name\":\"symbol_\",\"type\":\"string\"}],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"subtractedValue\",\"type\":\"uint256\"}],\"name\":\"decreaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"addedValue\",\"type\":\"uint256\"}],\"name\":\"increaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Implementation of the {IERC20} interface. This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20PresetMinterPauser}. TIP: For a detailed writeup see our guide https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How to implement supply mechanisms]. We have followed general OpenZeppelin Contracts guidelines: functions revert instead returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}.\",\"kind\":\"dev\",\"methods\":{\"allowance(address,address)\":{\"details\":\"See {IERC20-allowance}.\"},\"approve(address,uint256)\":{\"details\":\"See {IERC20-approve}. Requirements: - `spender` cannot be the zero address.\"},\"balanceOf(address)\":{\"details\":\"See {IERC20-balanceOf}.\"},\"constructor\":{\"details\":\"Sets the values for {name} and {symbol}. The default value of {decimals} is 18. To select a different value for {decimals} you should overload it. All two of these values are immutable: they can only be set once during construction.\"},\"decimals()\":{\"details\":\"Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5.05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless this function is overridden; NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}.\"},\"decreaseAllowance(address,uint256)\":{\"details\":\"Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`.\"},\"increaseAllowance(address,uint256)\":{\"details\":\"Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address.\"},\"name()\":{\"details\":\"Returns the name of the token.\"},\"symbol()\":{\"details\":\"Returns the symbol of the token, usually a shorter version of the name.\"},\"totalSupply()\":{\"details\":\"See {IERC20-totalSupply}.\"},\"transfer(address,uint256)\":{\"details\":\"See {IERC20-transfer}. Requirements: - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}. Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for ``sender``'s tokens of at least `amount`.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"project:/node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol\":\"ERC20\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"project:/node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol\":{\"keccak256\":\"0xb03df8481a954604ad0c9125680893b2e3f7ff770fe470e38b89ac61b84e8072\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://b34655953d18ba3a45b762fb6bdbb6549af69a27435e10ece178742bf70baf45\",\"dweb:/ipfs/QmcqjUoFLLMyx7dbwSHUnDBH6aphkVHXWQvQRRev5EAWEh\"]},\"project:/node_modules/@openzeppelin/contracts/token/ERC20/IERC20.sol\":{\"keccak256\":\"0x027b891937d20ccf213fdb9c31531574256de774bda99d3a70ecef6e1913ed2a\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://087318b21c528119f649899f5b5580566dd8d7b0303d4904bd0e8580c3545f14\",\"dweb:/ipfs/Qmbn5Mj7aUn8hJuQ8VrQjjEXRsXyJKykgnjR9p4C3nfLtL\"]},\"project:/node_modules/@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\":{\"keccak256\":\"0x83fe24f5c04a56091e50f4a345ff504c8bff658a76d4c43b16878c8f940c53b2\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://d4c3df1a7ca104b633a7d81c6c6f5192367d150cd5a32cba81f7f27012729013\",\"dweb:/ipfs/QmSim72e3ZVsfgZt8UceCvbiSuMRHR6WDsiamqNzZahGSY\"]},\"project:/node_modules/@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0x90565a39ae45c80f0468dc96c7b20d0afc3055f344c8203a0c9258239f350b9f\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://26e8b38a7ac8e7b4463af00cf7fff1bf48ae9875765bf4f7751e100124d0bc8c\",\"dweb:/ipfs/QmWcsmkVr24xmmjfnBQZoemFniXjj3vwT78Cz6uqZW1Hux\"]}},\"version\":1}",
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+              "src": "3954:28:5",
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+                        "nodeType": "YulLiteral",
+                        "src": "3971:1:5",
+                        "type": "",
+                        "value": "0"
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+                        "nodeType": "YulLiteral",
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+                        "value": "0"
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+                      "name": "revert",
+                      "nodeType": "YulIdentifier",
+                      "src": "3964:6:5"
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+                    "nodeType": "YulFunctionCall",
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+              "src": "4036:54:5",
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+                  "value": {
+                    "arguments": [
+                      {
+                        "arguments": [
+                          {
+                            "name": "value",
+                            "nodeType": "YulIdentifier",
+                            "src": "4064:5:5"
+                          },
+                          {
+                            "kind": "number",
+                            "nodeType": "YulLiteral",
+                            "src": "4071:2:5",
+                            "type": "",
+                            "value": "31"
+                          }
+                        ],
+                        "functionName": {
+                          "name": "add",
+                          "nodeType": "YulIdentifier",
+                          "src": "4060:3:5"
+                        },
+                        "nodeType": "YulFunctionCall",
+                        "src": "4060:14:5"
+                      },
+                      {
+                        "arguments": [
+                          {
+                            "kind": "number",
+                            "nodeType": "YulLiteral",
+                            "src": "4080:2:5",
+                            "type": "",
+                            "value": "31"
+                          }
+                        ],
+                        "functionName": {
+                          "name": "not",
+                          "nodeType": "YulIdentifier",
+                          "src": "4076:3:5"
+                        },
+                        "nodeType": "YulFunctionCall",
+                        "src": "4076:7:5"
+                      }
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+                    "functionName": {
+                      "name": "and",
+                      "nodeType": "YulIdentifier",
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+                      "nodeType": "YulIdentifier",
+                      "src": "4046:6:5"
+                    }
+                  ]
+                }
+              ]
+            },
+            "name": "round_up_to_mul_of_32",
+            "nodeType": "YulFunctionDefinition",
+            "parameters": [
+              {
+                "name": "value",
+                "nodeType": "YulTypedName",
+                "src": "4019:5:5",
+                "type": ""
+              }
+            ],
+            "returnVariables": [
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+                "name": "result",
+                "nodeType": "YulTypedName",
+                "src": "4029:6:5",
+                "type": ""
+              }
+            ],
+            "src": "3988:102:5"
+          }
+        ]
+      },
+      "contents": "{\n\n    function abi_decode_available_length_t_string_memory_ptr_fromMemory(src, length, end) -> array {\n        array := allocate_memory(array_allocation_size_t_string_memory_ptr(length))\n        mstore(array, length)\n        let dst := add(array, 0x20)\n        if gt(add(src, length), end) { revert_error_987264b3b1d58a9c7f8255e93e81c77d86d6299019c33110a076957a3e06e2ae() }\n        copy_memory_to_memory(src, dst, length)\n    }\n\n    // string\n    function abi_decode_t_string_memory_ptr_fromMemory(offset, end) -> array {\n        if iszero(slt(add(offset, 0x1f), end)) { revert_error_1b9f4a0a5773e33b91aa01db23bf8c55fce1411167c872835e7fa00a4f17d46d() }\n        let length := mload(offset)\n        array := abi_decode_available_length_t_string_memory_ptr_fromMemory(add(offset, 0x20), length, end)\n    }\n\n    function abi_decode_tuple_t_string_memory_ptrt_string_memory_ptr_fromMemory(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := mload(add(headStart, 0))\n            if gt(offset, 0xffffffffffffffff) { revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() }\n\n            value0 := abi_decode_t_string_memory_ptr_fromMemory(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := mload(add(headStart, 32))\n            if gt(offset, 0xffffffffffffffff) { revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() }\n\n            value1 := abi_decode_t_string_memory_ptr_fromMemory(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function allocate_memory(size) -> memPtr {\n        memPtr := allocate_unbounded()\n        finalize_allocation(memPtr, size)\n    }\n\n    function allocate_unbounded() -> memPtr {\n        memPtr := mload(64)\n    }\n\n    function array_allocation_size_t_string_memory_ptr(length) -> size {\n        // Make sure we can allocate memory without overflow\n        if gt(length, 0xffffffffffffffff) { panic_error_0x41() }\n\n        size := round_up_to_mul_of_32(length)\n\n        // add length slot\n        size := add(size, 0x20)\n\n    }\n\n    function copy_memory_to_memory(src, dst, length) {\n        let i := 0\n        for { } lt(i, length) { i := add(i, 32) }\n        {\n            mstore(add(dst, i), mload(add(src, i)))\n        }\n        if gt(i, length)\n        {\n            // clear end\n            mstore(add(dst, length), 0)\n        }\n    }\n\n    function extract_byte_array_length(data) -> length {\n        length := div(data, 2)\n        let outOfPlaceEncoding := and(data, 1)\n        if iszero(outOfPlaceEncoding) {\n            length := and(length, 0x7f)\n        }\n\n        if eq(outOfPlaceEncoding, lt(length, 32)) {\n            panic_error_0x22()\n        }\n    }\n\n    function finalize_allocation(memPtr, size) {\n        let newFreePtr := add(memPtr, round_up_to_mul_of_32(size))\n        // protect against overflow\n        if or(gt(newFreePtr, 0xffffffffffffffff), lt(newFreePtr, memPtr)) { panic_error_0x41() }\n        mstore(64, newFreePtr)\n    }\n\n    function panic_error_0x22() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x22)\n        revert(0, 0x24)\n    }\n\n    function panic_error_0x41() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x41)\n        revert(0, 0x24)\n    }\n\n    function revert_error_1b9f4a0a5773e33b91aa01db23bf8c55fce1411167c872835e7fa00a4f17d46d() {\n        revert(0, 0)\n    }\n\n    function revert_error_987264b3b1d58a9c7f8255e93e81c77d86d6299019c33110a076957a3e06e2ae() {\n        revert(0, 0)\n    }\n\n    function revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() {\n        revert(0, 0)\n    }\n\n    function revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() {\n        revert(0, 0)\n    }\n\n    function round_up_to_mul_of_32(value) -> result {\n        result := and(add(value, 31), not(31))\n    }\n\n}\n",
+      "id": 5,
+      "language": "Yul",
+      "name": "#utility.yul"
+    }
+  ],
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+                              }
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+                            },
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+              {
+                "name": "memPtr",
+                "nodeType": "YulTypedName",
+                "src": "13524:6:5",
+                "type": ""
+              }
+            ],
+            "src": "13426:224:5"
+          },
+          {
+            "body": {
+              "nodeType": "YulBlock",
+              "src": "13699:79:5",
+              "statements": [
+                {
+                  "body": {
+                    "nodeType": "YulBlock",
+                    "src": "13756:16:5",
+                    "statements": [
+                      {
+                        "expression": {
+                          "arguments": [
+                            {
+                              "kind": "number",
+                              "nodeType": "YulLiteral",
+                              "src": "13765:1:5",
+                              "type": "",
+                              "value": "0"
+                            },
+                            {
+                              "kind": "number",
+                              "nodeType": "YulLiteral",
+                              "src": "13768:1:5",
+                              "type": "",
+                              "value": "0"
+                            }
+                          ],
+                          "functionName": {
+                            "name": "revert",
+                            "nodeType": "YulIdentifier",
+                            "src": "13758:6:5"
+                          },
+                          "nodeType": "YulFunctionCall",
+                          "src": "13758:12:5"
+                        },
+                        "nodeType": "YulExpressionStatement",
+                        "src": "13758:12:5"
+                      }
+                    ]
+                  },
+                  "condition": {
+                    "arguments": [
+                      {
+                        "arguments": [
+                          {
+                            "name": "value",
+                            "nodeType": "YulIdentifier",
+                            "src": "13722:5:5"
+                          },
+                          {
+                            "arguments": [
+                              {
+                                "name": "value",
+                                "nodeType": "YulIdentifier",
+                                "src": "13747:5:5"
+                              }
+                            ],
+                            "functionName": {
+                              "name": "cleanup_t_address",
+                              "nodeType": "YulIdentifier",
+                              "src": "13729:17:5"
+                            },
+                            "nodeType": "YulFunctionCall",
+                            "src": "13729:24:5"
+                          }
+                        ],
+                        "functionName": {
+                          "name": "eq",
+                          "nodeType": "YulIdentifier",
+                          "src": "13719:2:5"
+                        },
+                        "nodeType": "YulFunctionCall",
+                        "src": "13719:35:5"
+                      }
+                    ],
+                    "functionName": {
+                      "name": "iszero",
+                      "nodeType": "YulIdentifier",
+                      "src": "13712:6:5"
+                    },
+                    "nodeType": "YulFunctionCall",
+                    "src": "13712:43:5"
+                  },
+                  "nodeType": "YulIf",
+                  "src": "13709:63:5"
+                }
+              ]
+            },
+            "name": "validator_revert_t_address",
+            "nodeType": "YulFunctionDefinition",
+            "parameters": [
+              {
+                "name": "value",
+                "nodeType": "YulTypedName",
+                "src": "13692:5:5",
+                "type": ""
+              }
+            ],
+            "src": "13656:122:5"
+          },
+          {
+            "body": {
+              "nodeType": "YulBlock",
+              "src": "13827:79:5",
+              "statements": [
+                {
+                  "body": {
+                    "nodeType": "YulBlock",
+                    "src": "13884:16:5",
+                    "statements": [
+                      {
+                        "expression": {
+                          "arguments": [
+                            {
+                              "kind": "number",
+                              "nodeType": "YulLiteral",
+                              "src": "13893:1:5",
+                              "type": "",
+                              "value": "0"
+                            },
+                            {
+                              "kind": "number",
+                              "nodeType": "YulLiteral",
+                              "src": "13896:1:5",
+                              "type": "",
+                              "value": "0"
+                            }
+                          ],
+                          "functionName": {
+                            "name": "revert",
+                            "nodeType": "YulIdentifier",
+                            "src": "13886:6:5"
+                          },
+                          "nodeType": "YulFunctionCall",
+                          "src": "13886:12:5"
+                        },
+                        "nodeType": "YulExpressionStatement",
+                        "src": "13886:12:5"
+                      }
+                    ]
+                  },
+                  "condition": {
+                    "arguments": [
+                      {
+                        "arguments": [
+                          {
+                            "name": "value",
+                            "nodeType": "YulIdentifier",
+                            "src": "13850:5:5"
+                          },
+                          {
+                            "arguments": [
+                              {
+                                "name": "value",
+                                "nodeType": "YulIdentifier",
+                                "src": "13875:5:5"
+                              }
+                            ],
+                            "functionName": {
+                              "name": "cleanup_t_uint256",
+                              "nodeType": "YulIdentifier",
+                              "src": "13857:17:5"
+                            },
+                            "nodeType": "YulFunctionCall",
+                            "src": "13857:24:5"
+                          }
+                        ],
+                        "functionName": {
+                          "name": "eq",
+                          "nodeType": "YulIdentifier",
+                          "src": "13847:2:5"
+                        },
+                        "nodeType": "YulFunctionCall",
+                        "src": "13847:35:5"
+                      }
+                    ],
+                    "functionName": {
+                      "name": "iszero",
+                      "nodeType": "YulIdentifier",
+                      "src": "13840:6:5"
+                    },
+                    "nodeType": "YulFunctionCall",
+                    "src": "13840:43:5"
+                  },
+                  "nodeType": "YulIf",
+                  "src": "13837:63:5"
+                }
+              ]
+            },
+            "name": "validator_revert_t_uint256",
+            "nodeType": "YulFunctionDefinition",
+            "parameters": [
+              {
+                "name": "value",
+                "nodeType": "YulTypedName",
+                "src": "13820:5:5",
+                "type": ""
+              }
+            ],
+            "src": "13784:122:5"
+          }
+        ]
+      },
+      "contents": "{\n\n    function abi_decode_t_address(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_address(value)\n    }\n\n    function abi_decode_t_uint256(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_uint256(value)\n    }\n\n    function abi_decode_tuple_t_address(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_decode_tuple_t_addresst_address(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_decode_tuple_t_addresst_addresst_uint256(headStart, dataEnd) -> value0, value1, value2 {\n        if slt(sub(dataEnd, headStart), 96) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 64\n\n            value2 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_decode_tuple_t_addresst_uint256(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_encode_t_bool_to_t_bool_fromStack(value, pos) {\n        mstore(pos, cleanup_t_bool(value))\n    }\n\n    function abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value, pos) -> end {\n        let length := array_length_t_string_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length)\n        copy_memory_to_memory(add(value, 0x20), pos, length)\n        end := add(pos, round_up_to_mul_of_32(length))\n    }\n\n    function abi_encode_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 35)\n        store_literal_in_memory_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 34)\n        store_literal_in_memory_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 38)\n        store_literal_in_memory_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 40)\n        store_literal_in_memory_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 37)\n        store_literal_in_memory_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 36)\n        store_literal_in_memory_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 37)\n        store_literal_in_memory_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_uint256_to_t_uint256_fromStack(value, pos) {\n        mstore(pos, cleanup_t_uint256(value))\n    }\n\n    function abi_encode_t_uint8_to_t_uint8_fromStack(value, pos) {\n        mstore(pos, cleanup_t_uint8(value))\n    }\n\n    function abi_encode_tuple_t_bool__to_t_bool__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_bool_to_t_bool_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function abi_encode_tuple_t_string_memory_ptr__to_t_string_memory_ptr__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value0,  tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function abi_encode_tuple_t_uint8__to_t_uint8__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_uint8_to_t_uint8_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function allocate_unbounded() -> memPtr {\n        memPtr := mload(64)\n    }\n\n    function array_length_t_string_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function checked_add_t_uint256(x, y) -> sum {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n\n        // overflow, if x > (maxValue - y)\n        if gt(x, sub(0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, y)) { panic_error_0x11() }\n\n        sum := add(x, y)\n    }\n\n    function cleanup_t_address(value) -> cleaned {\n        cleaned := cleanup_t_uint160(value)\n    }\n\n    function cleanup_t_bool(value) -> cleaned {\n        cleaned := iszero(iszero(value))\n    }\n\n    function cleanup_t_uint160(value) -> cleaned {\n        cleaned := and(value, 0xffffffffffffffffffffffffffffffffffffffff)\n    }\n\n    function cleanup_t_uint256(value) -> cleaned {\n        cleaned := value\n    }\n\n    function cleanup_t_uint8(value) -> cleaned {\n        cleaned := and(value, 0xff)\n    }\n\n    function copy_memory_to_memory(src, dst, length) {\n        let i := 0\n        for { } lt(i, length) { i := add(i, 32) }\n        {\n            mstore(add(dst, i), mload(add(src, i)))\n        }\n        if gt(i, length)\n        {\n            // clear end\n            mstore(add(dst, length), 0)\n        }\n    }\n\n    function extract_byte_array_length(data) -> length {\n        length := div(data, 2)\n        let outOfPlaceEncoding := and(data, 1)\n        if iszero(outOfPlaceEncoding) {\n            length := and(length, 0x7f)\n        }\n\n        if eq(outOfPlaceEncoding, lt(length, 32)) {\n            panic_error_0x22()\n        }\n    }\n\n    function panic_error_0x11() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x11)\n        revert(0, 0x24)\n    }\n\n    function panic_error_0x22() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x22)\n        revert(0, 0x24)\n    }\n\n    function revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() {\n        revert(0, 0)\n    }\n\n    function revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() {\n        revert(0, 0)\n    }\n\n    function round_up_to_mul_of_32(value) -> result {\n        result := and(add(value, 31), not(31))\n    }\n\n    function store_literal_in_memory_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: transfer to the zero addr\")\n\n        mstore(add(memPtr, 32), \"ess\")\n\n    }\n\n    function store_literal_in_memory_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: approve to the zero addre\")\n\n        mstore(add(memPtr, 32), \"ss\")\n\n    }\n\n    function store_literal_in_memory_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: transfer amount exceeds b\")\n\n        mstore(add(memPtr, 32), \"alance\")\n\n    }\n\n    function store_literal_in_memory_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: transfer amount exceeds a\")\n\n        mstore(add(memPtr, 32), \"llowance\")\n\n    }\n\n    function store_literal_in_memory_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: transfer from the zero ad\")\n\n        mstore(add(memPtr, 32), \"dress\")\n\n    }\n\n    function store_literal_in_memory_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: approve from the zero add\")\n\n        mstore(add(memPtr, 32), \"ress\")\n\n    }\n\n    function store_literal_in_memory_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: decreased allowance below\")\n\n        mstore(add(memPtr, 32), \" zero\")\n\n    }\n\n    function validator_revert_t_address(value) {\n        if iszero(eq(value, cleanup_t_address(value))) { revert(0, 0) }\n    }\n\n    function validator_revert_t_uint256(value) {\n        if iszero(eq(value, cleanup_t_uint256(value))) { revert(0, 0) }\n    }\n\n}\n",
+      "id": 5,
+      "language": "Yul",
+      "name": "#utility.yul"
+    }
+  ],
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+  "source": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"./IERC20.sol\";\nimport \"./extensions/IERC20Metadata.sol\";\nimport \"../../utils/Context.sol\";\n\n/**\n * @dev Implementation of the {IERC20} interface.\n *\n * This implementation is agnostic to the way tokens are created. This means\n * that a supply mechanism has to be added in a derived contract using {_mint}.\n * For a generic mechanism see {ERC20PresetMinterPauser}.\n *\n * TIP: For a detailed writeup see our guide\n * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\n *\n * We have followed general OpenZeppelin Contracts guidelines: functions revert\n * instead returning `false` on failure. This behavior is nonetheless\n * conventional and does not conflict with the expectations of ERC20\n * applications.\n *\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n * This allows applications to reconstruct the allowance for all accounts just\n * by listening to said events. Other implementations of the EIP may not emit\n * these events, as it isn't required by the specification.\n *\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n * functions have been added to mitigate the well-known issues around setting\n * allowances. See {IERC20-approve}.\n */\ncontract ERC20 is Context, IERC20, IERC20Metadata {\n    mapping(address => uint256) private _balances;\n\n    mapping(address => mapping(address => uint256)) private _allowances;\n\n    uint256 private _totalSupply;\n\n    string private _name;\n    string private _symbol;\n\n    /**\n     * @dev Sets the values for {name} and {symbol}.\n     *\n     * The default value of {decimals} is 18. To select a different value for\n     * {decimals} you should overload it.\n     *\n     * All two of these values are immutable: they can only be set once during\n     * construction.\n     */\n    constructor(string memory name_, string memory symbol_) {\n        _name = name_;\n        _symbol = symbol_;\n    }\n\n    /**\n     * @dev Returns the name of the token.\n     */\n    function name() public view virtual override returns (string memory) {\n        return _name;\n    }\n\n    /**\n     * @dev Returns the symbol of the token, usually a shorter version of the\n     * name.\n     */\n    function symbol() public view virtual override returns (string memory) {\n        return _symbol;\n    }\n\n    /**\n     * @dev Returns the number of decimals used to get its user representation.\n     * For example, if `decimals` equals `2`, a balance of `505` tokens should\n     * be displayed to a user as `5.05` (`505 / 10 ** 2`).\n     *\n     * Tokens usually opt for a value of 18, imitating the relationship between\n     * Ether and Wei. This is the value {ERC20} uses, unless this function is\n     * overridden;\n     *\n     * NOTE: This information is only used for _display_ purposes: it in\n     * no way affects any of the arithmetic of the contract, including\n     * {IERC20-balanceOf} and {IERC20-transfer}.\n     */\n    function decimals() public view virtual override returns (uint8) {\n        return 18;\n    }\n\n    /**\n     * @dev See {IERC20-totalSupply}.\n     */\n    function totalSupply() public view virtual override returns (uint256) {\n        return _totalSupply;\n    }\n\n    /**\n     * @dev See {IERC20-balanceOf}.\n     */\n    function balanceOf(address account) public view virtual override returns (uint256) {\n        return _balances[account];\n    }\n\n    /**\n     * @dev See {IERC20-transfer}.\n     *\n     * Requirements:\n     *\n     * - `recipient` cannot be the zero address.\n     * - the caller must have a balance of at least `amount`.\n     */\n    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {\n        _transfer(_msgSender(), recipient, amount);\n        return true;\n    }\n\n    /**\n     * @dev See {IERC20-allowance}.\n     */\n    function allowance(address owner, address spender) public view virtual override returns (uint256) {\n        return _allowances[owner][spender];\n    }\n\n    /**\n     * @dev See {IERC20-approve}.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     */\n    function approve(address spender, uint256 amount) public virtual override returns (bool) {\n        _approve(_msgSender(), spender, amount);\n        return true;\n    }\n\n    /**\n     * @dev See {IERC20-transferFrom}.\n     *\n     * Emits an {Approval} event indicating the updated allowance. This is not\n     * required by the EIP. See the note at the beginning of {ERC20}.\n     *\n     * Requirements:\n     *\n     * - `sender` and `recipient` cannot be the zero address.\n     * - `sender` must have a balance of at least `amount`.\n     * - the caller must have allowance for ``sender``'s tokens of at least\n     * `amount`.\n     */\n    function transferFrom(\n        address sender,\n        address recipient,\n        uint256 amount\n    ) public virtual override returns (bool) {\n        _transfer(sender, recipient, amount);\n\n        uint256 currentAllowance = _allowances[sender][_msgSender()];\n        require(currentAllowance >= amount, \"ERC20: transfer amount exceeds allowance\");\n        unchecked {\n            _approve(sender, _msgSender(), currentAllowance - amount);\n        }\n\n        return true;\n    }\n\n    /**\n     * @dev Atomically increases the allowance granted to `spender` by the caller.\n     *\n     * This is an alternative to {approve} that can be used as a mitigation for\n     * problems described in {IERC20-approve}.\n     *\n     * Emits an {Approval} event indicating the updated allowance.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     */\n    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\n        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);\n        return true;\n    }\n\n    /**\n     * @dev Atomically decreases the allowance granted to `spender` by the caller.\n     *\n     * This is an alternative to {approve} that can be used as a mitigation for\n     * problems described in {IERC20-approve}.\n     *\n     * Emits an {Approval} event indicating the updated allowance.\n     *\n     * Requirements:\n     *\n     * - `spender` cannot be the zero address.\n     * - `spender` must have allowance for the caller of at least\n     * `subtractedValue`.\n     */\n    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\n        uint256 currentAllowance = _allowances[_msgSender()][spender];\n        require(currentAllowance >= subtractedValue, \"ERC20: decreased allowance below zero\");\n        unchecked {\n            _approve(_msgSender(), spender, currentAllowance - subtractedValue);\n        }\n\n        return true;\n    }\n\n    /**\n     * @dev Moves `amount` of tokens from `sender` to `recipient`.\n     *\n     * This internal function is equivalent to {transfer}, and can be used to\n     * e.g. implement automatic token fees, slashing mechanisms, etc.\n     *\n     * Emits a {Transfer} event.\n     *\n     * Requirements:\n     *\n     * - `sender` cannot be the zero address.\n     * - `recipient` cannot be the zero address.\n     * - `sender` must have a balance of at least `amount`.\n     */\n    function _transfer(\n        address sender,\n        address recipient,\n        uint256 amount\n    ) internal virtual {\n        require(sender != address(0), \"ERC20: transfer from the zero address\");\n        require(recipient != address(0), \"ERC20: transfer to the zero address\");\n\n        _beforeTokenTransfer(sender, recipient, amount);\n\n        uint256 senderBalance = _balances[sender];\n        require(senderBalance >= amount, \"ERC20: transfer amount exceeds balance\");\n        unchecked {\n            _balances[sender] = senderBalance - amount;\n        }\n        _balances[recipient] += amount;\n\n        emit Transfer(sender, recipient, amount);\n\n        _afterTokenTransfer(sender, recipient, amount);\n    }\n\n    /** @dev Creates `amount` tokens and assigns them to `account`, increasing\n     * the total supply.\n     *\n     * Emits a {Transfer} event with `from` set to the zero address.\n     *\n     * Requirements:\n     *\n     * - `account` cannot be the zero address.\n     */\n    function _mint(address account, uint256 amount) internal virtual {\n        require(account != address(0), \"ERC20: mint to the zero address\");\n\n        _beforeTokenTransfer(address(0), account, amount);\n\n        _totalSupply += amount;\n        _balances[account] += amount;\n        emit Transfer(address(0), account, amount);\n\n        _afterTokenTransfer(address(0), account, amount);\n    }\n\n    /**\n     * @dev Destroys `amount` tokens from `account`, reducing the\n     * total supply.\n     *\n     * Emits a {Transfer} event with `to` set to the zero address.\n     *\n     * Requirements:\n     *\n     * - `account` cannot be the zero address.\n     * - `account` must have at least `amount` tokens.\n     */\n    function _burn(address account, uint256 amount) internal virtual {\n        require(account != address(0), \"ERC20: burn from the zero address\");\n\n        _beforeTokenTransfer(account, address(0), amount);\n\n        uint256 accountBalance = _balances[account];\n        require(accountBalance >= amount, \"ERC20: burn amount exceeds balance\");\n        unchecked {\n            _balances[account] = accountBalance - amount;\n        }\n        _totalSupply -= amount;\n\n        emit Transfer(account, address(0), amount);\n\n        _afterTokenTransfer(account, address(0), amount);\n    }\n\n    /**\n     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n     *\n     * This internal function is equivalent to `approve`, and can be used to\n     * e.g. set automatic allowances for certain subsystems, etc.\n     *\n     * Emits an {Approval} event.\n     *\n     * Requirements:\n     *\n     * - `owner` cannot be the zero address.\n     * - `spender` cannot be the zero address.\n     */\n    function _approve(\n        address owner,\n        address spender,\n        uint256 amount\n    ) internal virtual {\n        require(owner != address(0), \"ERC20: approve from the zero address\");\n        require(spender != address(0), \"ERC20: approve to the zero address\");\n\n        _allowances[owner][spender] = amount;\n        emit Approval(owner, spender, amount);\n    }\n\n    /**\n     * @dev Hook that is called before any transfer of tokens. This includes\n     * minting and burning.\n     *\n     * Calling conditions:\n     *\n     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n     * will be transferred to `to`.\n     * - when `from` is zero, `amount` tokens will be minted for `to`.\n     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n     * - `from` and `to` are never both zero.\n     *\n     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n     */\n    function _beforeTokenTransfer(\n        address from,\n        address to,\n        uint256 amount\n    ) internal virtual {}\n\n    /**\n     * @dev Hook that is called after any transfer of tokens. This includes\n     * minting and burning.\n     *\n     * Calling conditions:\n     *\n     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n     * has been transferred to `to`.\n     * - when `from` is zero, `amount` tokens have been minted for `to`.\n     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.\n     * - `from` and `to` are never both zero.\n     *\n     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n     */\n    function _afterTokenTransfer(\n        address from,\n        address to,\n        uint256 amount\n    ) internal virtual {}\n}\n",
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+              "text": " @dev Sets the values for {name} and {symbol}.\n The default value of {decimals} is 18. To select a different value for\n {decimals} you should overload it.\n All two of these values are immutable: they can only be set once during\n construction."
+            },
+            "id": 69,
+            "implemented": true,
+            "kind": "constructor",
+            "modifiers": [],
+            "name": "",
+            "nameLocation": "-1:-1:-1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 58,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 55,
+                  "mutability": "mutable",
+                  "name": "name_",
+                  "nameLocation": "1932:5:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 69,
+                  "src": "1918:19:1",
+                  "stateVariable": false,
+                  "storageLocation": "memory",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
+                  },
+                  "typeName": {
+                    "id": 54,
+                    "name": "string",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1918:6:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 57,
+                  "mutability": "mutable",
+                  "name": "symbol_",
+                  "nameLocation": "1953:7:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 69,
+                  "src": "1939:21:1",
+                  "stateVariable": false,
+                  "storageLocation": "memory",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
+                  },
+                  "typeName": {
+                    "id": 56,
+                    "name": "string",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1939:6:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "1917:44:1"
+            },
+            "returnParameters": {
+              "id": 59,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "1962:0:1"
+            },
+            "scope": 570,
+            "src": "1906:113:1",
+            "stateMutability": "nonpayable",
+            "virtual": false,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              660
+            ],
+            "body": {
+              "id": 78,
+              "nodeType": "Block",
+              "src": "2153:29:1",
+              "statements": [
+                {
+                  "expression": {
+                    "id": 76,
+                    "name": "_name",
+                    "nodeType": "Identifier",
+                    "overloadedDeclarations": [],
+                    "referencedDeclaration": 50,
+                    "src": "2170:5:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage",
+                      "typeString": "string storage ref"
+                    }
+                  },
+                  "functionReturnParameters": 75,
+                  "id": 77,
+                  "nodeType": "Return",
+                  "src": "2163:12:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 70,
+              "nodeType": "StructuredDocumentation",
+              "src": "2025:54:1",
+              "text": " @dev Returns the name of the token."
+            },
+            "functionSelector": "06fdde03",
+            "id": 79,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "name",
+            "nameLocation": "2093:4:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 72,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "2120:8:1"
+            },
+            "parameters": {
+              "id": 71,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "2097:2:1"
+            },
+            "returnParameters": {
+              "id": 75,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 74,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 79,
+                  "src": "2138:13:1",
+                  "stateVariable": false,
+                  "storageLocation": "memory",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
+                  },
+                  "typeName": {
+                    "id": 73,
+                    "name": "string",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2138:6:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2137:15:1"
+            },
+            "scope": 570,
+            "src": "2084:98:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              666
+            ],
+            "body": {
+              "id": 88,
+              "nodeType": "Block",
+              "src": "2366:31:1",
+              "statements": [
+                {
+                  "expression": {
+                    "id": 86,
+                    "name": "_symbol",
+                    "nodeType": "Identifier",
+                    "overloadedDeclarations": [],
+                    "referencedDeclaration": 52,
+                    "src": "2383:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage",
+                      "typeString": "string storage ref"
+                    }
+                  },
+                  "functionReturnParameters": 85,
+                  "id": 87,
+                  "nodeType": "Return",
+                  "src": "2376:14:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 80,
+              "nodeType": "StructuredDocumentation",
+              "src": "2188:102:1",
+              "text": " @dev Returns the symbol of the token, usually a shorter version of the\n name."
+            },
+            "functionSelector": "95d89b41",
+            "id": 89,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "symbol",
+            "nameLocation": "2304:6:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 82,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "2333:8:1"
+            },
+            "parameters": {
+              "id": 81,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "2310:2:1"
+            },
+            "returnParameters": {
+              "id": 85,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 84,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 89,
+                  "src": "2351:13:1",
+                  "stateVariable": false,
+                  "storageLocation": "memory",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
+                  },
+                  "typeName": {
+                    "id": 83,
+                    "name": "string",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2351:6:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2350:15:1"
+            },
+            "scope": 570,
+            "src": "2295:102:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              672
+            ],
+            "body": {
+              "id": 98,
+              "nodeType": "Block",
+              "src": "3086:26:1",
+              "statements": [
+                {
+                  "expression": {
+                    "hexValue": "3138",
+                    "id": 96,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": true,
+                    "kind": "number",
+                    "lValueRequested": false,
+                    "nodeType": "Literal",
+                    "src": "3103:2:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_rational_18_by_1",
+                      "typeString": "int_const 18"
+                    },
+                    "value": "18"
+                  },
+                  "functionReturnParameters": 95,
+                  "id": 97,
+                  "nodeType": "Return",
+                  "src": "3096:9:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 90,
+              "nodeType": "StructuredDocumentation",
+              "src": "2403:613:1",
+              "text": " @dev Returns the number of decimals used to get its user representation.\n For example, if `decimals` equals `2`, a balance of `505` tokens should\n be displayed to a user as `5.05` (`505 / 10 ** 2`).\n Tokens usually opt for a value of 18, imitating the relationship between\n Ether and Wei. This is the value {ERC20} uses, unless this function is\n overridden;\n NOTE: This information is only used for _display_ purposes: it in\n no way affects any of the arithmetic of the contract, including\n {IERC20-balanceOf} and {IERC20-transfer}."
+            },
+            "functionSelector": "313ce567",
+            "id": 99,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "decimals",
+            "nameLocation": "3030:8:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 92,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "3061:8:1"
+            },
+            "parameters": {
+              "id": 91,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "3038:2:1"
+            },
+            "returnParameters": {
+              "id": 95,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 94,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 99,
+                  "src": "3079:5:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint8",
+                    "typeString": "uint8"
+                  },
+                  "typeName": {
+                    "id": 93,
+                    "name": "uint8",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "3079:5:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint8",
+                      "typeString": "uint8"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "3078:7:1"
+            },
+            "scope": 570,
+            "src": "3021:91:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              579
+            ],
+            "body": {
+              "id": 108,
+              "nodeType": "Block",
+              "src": "3242:36:1",
+              "statements": [
+                {
+                  "expression": {
+                    "id": 106,
+                    "name": "_totalSupply",
+                    "nodeType": "Identifier",
+                    "overloadedDeclarations": [],
+                    "referencedDeclaration": 48,
+                    "src": "3259:12:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "functionReturnParameters": 105,
+                  "id": 107,
+                  "nodeType": "Return",
+                  "src": "3252:19:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 100,
+              "nodeType": "StructuredDocumentation",
+              "src": "3118:49:1",
+              "text": " @dev See {IERC20-totalSupply}."
+            },
+            "functionSelector": "18160ddd",
+            "id": 109,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "totalSupply",
+            "nameLocation": "3181:11:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 102,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "3215:8:1"
+            },
+            "parameters": {
+              "id": 101,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "3192:2:1"
+            },
+            "returnParameters": {
+              "id": 105,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 104,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 109,
+                  "src": "3233:7:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 103,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "3233:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "3232:9:1"
+            },
+            "scope": 570,
+            "src": "3172:106:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              587
+            ],
+            "body": {
+              "id": 122,
+              "nodeType": "Block",
+              "src": "3419:42:1",
+              "statements": [
+                {
+                  "expression": {
+                    "baseExpression": {
+                      "id": 118,
+                      "name": "_balances",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 40,
+                      "src": "3436:9:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
+                        "typeString": "mapping(address => uint256)"
+                      }
+                    },
+                    "id": 120,
+                    "indexExpression": {
+                      "id": 119,
+                      "name": "account",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 112,
+                      "src": "3446:7:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_address",
+                        "typeString": "address"
+                      }
+                    },
+                    "isConstant": false,
+                    "isLValue": true,
+                    "isPure": false,
+                    "lValueRequested": false,
+                    "nodeType": "IndexAccess",
+                    "src": "3436:18:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "functionReturnParameters": 117,
+                  "id": 121,
+                  "nodeType": "Return",
+                  "src": "3429:25:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 110,
+              "nodeType": "StructuredDocumentation",
+              "src": "3284:47:1",
+              "text": " @dev See {IERC20-balanceOf}."
+            },
+            "functionSelector": "70a08231",
+            "id": 123,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "balanceOf",
+            "nameLocation": "3345:9:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 114,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "3392:8:1"
+            },
+            "parameters": {
+              "id": 113,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 112,
+                  "mutability": "mutable",
+                  "name": "account",
+                  "nameLocation": "3363:7:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 123,
+                  "src": "3355:15:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 111,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "3355:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "3354:17:1"
+            },
+            "returnParameters": {
+              "id": 117,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 116,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 123,
+                  "src": "3410:7:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 115,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "3410:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "3409:9:1"
+            },
+            "scope": 570,
+            "src": "3336:125:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              597
+            ],
+            "body": {
+              "id": 143,
+              "nodeType": "Block",
+              "src": "3756:80:1",
+              "statements": [
+                {
+                  "expression": {
+                    "arguments": [
+                      {
+                        "arguments": [],
+                        "expression": {
+                          "argumentTypes": [],
+                          "id": 135,
+                          "name": "_msgSender",
+                          "nodeType": "Identifier",
+                          "overloadedDeclarations": [],
+                          "referencedDeclaration": 685,
+                          "src": "3776:10:1",
+                          "typeDescriptions": {
+                            "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$",
+                            "typeString": "function () view returns (address)"
+                          }
+                        },
+                        "id": 136,
+                        "isConstant": false,
+                        "isLValue": false,
+                        "isPure": false,
+                        "kind": "functionCall",
+                        "lValueRequested": false,
+                        "names": [],
+                        "nodeType": "FunctionCall",
+                        "src": "3776:12:1",
+                        "tryCall": false,
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 137,
+                        "name": "recipient",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 126,
+                        "src": "3790:9:1",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 138,
+                        "name": "amount",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 128,
+                        "src": "3801:6:1",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      }
+                    ],
+                    "expression": {
+                      "argumentTypes": [
+                        {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        },
+                        {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        },
+                        {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      ],
+                      "id": 134,
+                      "name": "_transfer",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 374,
+                      "src": "3766:9:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
+                        "typeString": "function (address,address,uint256)"
+                      }
+                    },
+                    "id": 139,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "kind": "functionCall",
+                    "lValueRequested": false,
+                    "names": [],
+                    "nodeType": "FunctionCall",
+                    "src": "3766:42:1",
+                    "tryCall": false,
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_tuple$__$",
+                      "typeString": "tuple()"
+                    }
+                  },
+                  "id": 140,
+                  "nodeType": "ExpressionStatement",
+                  "src": "3766:42:1"
+                },
+                {
+                  "expression": {
+                    "hexValue": "74727565",
+                    "id": 141,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": true,
+                    "kind": "bool",
+                    "lValueRequested": false,
+                    "nodeType": "Literal",
+                    "src": "3825:4:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_bool",
+                      "typeString": "bool"
+                    },
+                    "value": "true"
+                  },
+                  "functionReturnParameters": 133,
+                  "id": 142,
+                  "nodeType": "Return",
+                  "src": "3818:11:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 124,
+              "nodeType": "StructuredDocumentation",
+              "src": "3467:192:1",
+              "text": " @dev See {IERC20-transfer}.\n Requirements:\n - `recipient` cannot be the zero address.\n - the caller must have a balance of at least `amount`."
+            },
+            "functionSelector": "a9059cbb",
+            "id": 144,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "transfer",
+            "nameLocation": "3673:8:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 130,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "3732:8:1"
+            },
+            "parameters": {
+              "id": 129,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 126,
+                  "mutability": "mutable",
+                  "name": "recipient",
+                  "nameLocation": "3690:9:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 144,
+                  "src": "3682:17:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
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+                            "name": "sender",
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+                            "overloadedDeclarations": [],
+                            "referencedDeclaration": 186,
+                            "src": "5205:6:1",
+                            "typeDescriptions": {
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+                              "typeDescriptions": {
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+                                "typeString": "uint256"
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+                              "typeString": "address"
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+              ]
+            },
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+              "text": " @dev See {IERC20-transferFrom}.\n Emits an {Approval} event indicating the updated allowance. This is not\n required by the EIP. See the note at the beginning of {ERC20}.\n Requirements:\n - `sender` and `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`.\n - the caller must have allowance for ``sender``'s tokens of at least\n `amount`."
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+                    "typeString": "bool"
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+                          "referencedDeclaration": 685,
+                          "src": "5800:10:1",
+                          "typeDescriptions": {
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+                        "name": "spender",
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+                          "typeString": "address"
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+                      },
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+                              "name": "_allowances",
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+                                "typeString": "mapping(address => mapping(address => uint256))"
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+                                "src": "5835:10:1",
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+              "nodeType": "StructuredDocumentation",
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+            },
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+                  "src": "5731:18:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
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+              "text": " @dev Moves `amount` of tokens from `sender` to `recipient`.\n This internal function is equivalent to {transfer}, and can be used to\n e.g. implement automatic token fees, slashing mechanisms, etc.\n Emits a {Transfer} event.\n Requirements:\n - `sender` cannot be the zero address.\n - `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`."
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+            "documentation": {
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+              "nodeType": "StructuredDocumentation",
+              "src": "7984:265:1",
+              "text": "@dev Creates `amount` tokens and assigns them to `account`, increasing\n the total supply.\n Emits a {Transfer} event with `from` set to the zero address.\n Requirements:\n - `account` cannot be the zero address."
+            },
+            "id": 430,
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+                    "id": 544,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "kind": "functionCall",
+                    "lValueRequested": false,
+                    "names": [],
+                    "nodeType": "FunctionCall",
+                    "src": "10293:32:1",
+                    "tryCall": false,
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_tuple$__$",
+                      "typeString": "tuple()"
+                    }
+                  },
+                  "id": 545,
+                  "nodeType": "EmitStatement",
+                  "src": "10288:37:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 503,
+              "nodeType": "StructuredDocumentation",
+              "src": "9545:412:1",
+              "text": " @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n This internal function is equivalent to `approve`, and can be used to\n e.g. set automatic allowances for certain subsystems, etc.\n Emits an {Approval} event.\n Requirements:\n - `owner` cannot be the zero address.\n - `spender` cannot be the zero address."
+            },
+            "id": 547,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_approve",
+            "nameLocation": "9971:8:1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 510,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 505,
+                  "mutability": "mutable",
+                  "name": "owner",
+                  "nameLocation": "9997:5:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 547,
+                  "src": "9989:13:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 504,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "9989:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 507,
+                  "mutability": "mutable",
+                  "name": "spender",
+                  "nameLocation": "10020:7:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 547,
+                  "src": "10012:15:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 506,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10012:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 509,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "10045:6:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 547,
+                  "src": "10037:14:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 508,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10037:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "9979:78:1"
+            },
+            "returnParameters": {
+              "id": 511,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "10075:0:1"
+            },
+            "scope": 570,
+            "src": "9962:370:1",
+            "stateMutability": "nonpayable",
+            "virtual": true,
+            "visibility": "internal"
+          },
+          {
+            "body": {
+              "id": 557,
+              "nodeType": "Block",
+              "src": "11035:2:1",
+              "statements": []
+            },
+            "documentation": {
+              "id": 548,
+              "nodeType": "StructuredDocumentation",
+              "src": "10338:573:1",
+              "text": " @dev Hook that is called before any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n will be transferred to `to`.\n - when `from` is zero, `amount` tokens will be minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]."
+            },
+            "id": 558,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_beforeTokenTransfer",
+            "nameLocation": "10925:20:1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 555,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 550,
+                  "mutability": "mutable",
+                  "name": "from",
+                  "nameLocation": "10963:4:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 558,
+                  "src": "10955:12:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 549,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10955:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 552,
+                  "mutability": "mutable",
+                  "name": "to",
+                  "nameLocation": "10985:2:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 558,
+                  "src": "10977:10:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 551,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10977:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 554,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "11005:6:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 558,
+                  "src": "10997:14:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 553,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10997:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "10945:72:1"
+            },
+            "returnParameters": {
+              "id": 556,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "11035:0:1"
+            },
+            "scope": 570,
+            "src": "10916:121:1",
+            "stateMutability": "nonpayable",
+            "virtual": true,
+            "visibility": "internal"
+          },
+          {
+            "body": {
+              "id": 568,
+              "nodeType": "Block",
+              "src": "11743:2:1",
+              "statements": []
+            },
+            "documentation": {
+              "id": 559,
+              "nodeType": "StructuredDocumentation",
+              "src": "11043:577:1",
+              "text": " @dev Hook that is called after any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n has been transferred to `to`.\n - when `from` is zero, `amount` tokens have been minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens have been burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]."
+            },
+            "id": 569,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_afterTokenTransfer",
+            "nameLocation": "11634:19:1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 566,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 561,
+                  "mutability": "mutable",
+                  "name": "from",
+                  "nameLocation": "11671:4:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 569,
+                  "src": "11663:12:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 560,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "11663:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 563,
+                  "mutability": "mutable",
+                  "name": "to",
+                  "nameLocation": "11693:2:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 569,
+                  "src": "11685:10:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 562,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "11685:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 565,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "11713:6:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 569,
+                  "src": "11705:14:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 564,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "11705:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "11653:72:1"
+            },
+            "returnParameters": {
+              "id": 567,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "11743:0:1"
+            },
+            "scope": 570,
+            "src": "11625:120:1",
+            "stateMutability": "nonpayable",
+            "virtual": true,
+            "visibility": "internal"
+          }
+        ],
+        "scope": 571,
+        "src": "1331:10416:1",
+        "usedErrors": []
+      }
+    ],
+    "src": "33:11715:1"
+  },
+  "legacyAST": {
+    "absolutePath": "project:/node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol",
+    "exportedSymbols": {
+      "Context": [
+        695
+      ],
+      "ERC20": [
+        570
+      ],
+      "IERC20": [
+        648
+      ],
+      "IERC20Metadata": [
+        673
+      ]
+    },
+    "id": 571,
+    "license": "MIT",
+    "nodeType": "SourceUnit",
+    "nodes": [
+      {
+        "id": 26,
+        "literals": [
+          "solidity",
+          "^",
+          "0.8",
+          ".0"
+        ],
+        "nodeType": "PragmaDirective",
+        "src": "33:23:1"
+      },
+      {
+        "absolutePath": "project:/node_modules/@openzeppelin/contracts/token/ERC20/IERC20.sol",
+        "file": "./IERC20.sol",
+        "id": 27,
+        "nameLocation": "-1:-1:-1",
+        "nodeType": "ImportDirective",
+        "scope": 571,
+        "sourceUnit": 649,
+        "src": "58:22:1",
+        "symbolAliases": [],
+        "unitAlias": ""
+      },
+      {
+        "absolutePath": "project:/node_modules/@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol",
+        "file": "./extensions/IERC20Metadata.sol",
+        "id": 28,
+        "nameLocation": "-1:-1:-1",
+        "nodeType": "ImportDirective",
+        "scope": 571,
+        "sourceUnit": 674,
+        "src": "81:41:1",
+        "symbolAliases": [],
+        "unitAlias": ""
+      },
+      {
+        "absolutePath": "project:/node_modules/@openzeppelin/contracts/utils/Context.sol",
+        "file": "../../utils/Context.sol",
+        "id": 29,
+        "nameLocation": "-1:-1:-1",
+        "nodeType": "ImportDirective",
+        "scope": 571,
+        "sourceUnit": 696,
+        "src": "123:33:1",
+        "symbolAliases": [],
+        "unitAlias": ""
+      },
+      {
+        "abstract": false,
+        "baseContracts": [
+          {
+            "baseName": {
+              "id": 31,
+              "name": "Context",
+              "nodeType": "IdentifierPath",
+              "referencedDeclaration": 695,
+              "src": "1349:7:1"
+            },
+            "id": 32,
+            "nodeType": "InheritanceSpecifier",
+            "src": "1349:7:1"
+          },
+          {
+            "baseName": {
+              "id": 33,
+              "name": "IERC20",
+              "nodeType": "IdentifierPath",
+              "referencedDeclaration": 648,
+              "src": "1358:6:1"
+            },
+            "id": 34,
+            "nodeType": "InheritanceSpecifier",
+            "src": "1358:6:1"
+          },
+          {
+            "baseName": {
+              "id": 35,
+              "name": "IERC20Metadata",
+              "nodeType": "IdentifierPath",
+              "referencedDeclaration": 673,
+              "src": "1366:14:1"
+            },
+            "id": 36,
+            "nodeType": "InheritanceSpecifier",
+            "src": "1366:14:1"
+          }
+        ],
+        "contractDependencies": [],
+        "contractKind": "contract",
+        "documentation": {
+          "id": 30,
+          "nodeType": "StructuredDocumentation",
+          "src": "158:1172:1",
+          "text": " @dev Implementation of the {IERC20} interface.\n This implementation is agnostic to the way tokens are created. This means\n that a supply mechanism has to be added in a derived contract using {_mint}.\n For a generic mechanism see {ERC20PresetMinterPauser}.\n TIP: For a detailed writeup see our guide\n https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n to implement supply mechanisms].\n We have followed general OpenZeppelin Contracts guidelines: functions revert\n instead returning `false` on failure. This behavior is nonetheless\n conventional and does not conflict with the expectations of ERC20\n applications.\n Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n This allows applications to reconstruct the allowance for all accounts just\n by listening to said events. Other implementations of the EIP may not emit\n these events, as it isn't required by the specification.\n Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n functions have been added to mitigate the well-known issues around setting\n allowances. See {IERC20-approve}."
+        },
+        "fullyImplemented": true,
+        "id": 570,
+        "linearizedBaseContracts": [
+          570,
+          673,
+          648,
+          695
+        ],
+        "name": "ERC20",
+        "nameLocation": "1340:5:1",
+        "nodeType": "ContractDefinition",
+        "nodes": [
+          {
+            "constant": false,
+            "id": 40,
+            "mutability": "mutable",
+            "name": "_balances",
+            "nameLocation": "1423:9:1",
+            "nodeType": "VariableDeclaration",
+            "scope": 570,
+            "src": "1387:45:1",
+            "stateVariable": true,
+            "storageLocation": "default",
+            "typeDescriptions": {
+              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
+              "typeString": "mapping(address => uint256)"
+            },
+            "typeName": {
+              "id": 39,
+              "keyType": {
+                "id": 37,
+                "name": "address",
+                "nodeType": "ElementaryTypeName",
+                "src": "1395:7:1",
+                "typeDescriptions": {
+                  "typeIdentifier": "t_address",
+                  "typeString": "address"
+                }
+              },
+              "nodeType": "Mapping",
+              "src": "1387:27:1",
+              "typeDescriptions": {
+                "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
+                "typeString": "mapping(address => uint256)"
+              },
+              "valueType": {
+                "id": 38,
+                "name": "uint256",
+                "nodeType": "ElementaryTypeName",
+                "src": "1406:7:1",
+                "typeDescriptions": {
+                  "typeIdentifier": "t_uint256",
+                  "typeString": "uint256"
+                }
+              }
+            },
+            "visibility": "private"
+          },
+          {
+            "constant": false,
+            "id": 46,
+            "mutability": "mutable",
+            "name": "_allowances",
+            "nameLocation": "1495:11:1",
+            "nodeType": "VariableDeclaration",
+            "scope": 570,
+            "src": "1439:67:1",
+            "stateVariable": true,
+            "storageLocation": "default",
+            "typeDescriptions": {
+              "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
+              "typeString": "mapping(address => mapping(address => uint256))"
+            },
+            "typeName": {
+              "id": 45,
+              "keyType": {
+                "id": 41,
+                "name": "address",
+                "nodeType": "ElementaryTypeName",
+                "src": "1447:7:1",
+                "typeDescriptions": {
+                  "typeIdentifier": "t_address",
+                  "typeString": "address"
+                }
+              },
+              "nodeType": "Mapping",
+              "src": "1439:47:1",
+              "typeDescriptions": {
+                "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_address_$_t_uint256_$_$",
+                "typeString": "mapping(address => mapping(address => uint256))"
+              },
+              "valueType": {
+                "id": 44,
+                "keyType": {
+                  "id": 42,
+                  "name": "address",
+                  "nodeType": "ElementaryTypeName",
+                  "src": "1466:7:1",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  }
+                },
+                "nodeType": "Mapping",
+                "src": "1458:27:1",
+                "typeDescriptions": {
+                  "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
+                  "typeString": "mapping(address => uint256)"
+                },
+                "valueType": {
+                  "id": 43,
+                  "name": "uint256",
+                  "nodeType": "ElementaryTypeName",
+                  "src": "1477:7:1",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  }
+                }
+              }
+            },
+            "visibility": "private"
+          },
+          {
+            "constant": false,
+            "id": 48,
+            "mutability": "mutable",
+            "name": "_totalSupply",
+            "nameLocation": "1529:12:1",
+            "nodeType": "VariableDeclaration",
+            "scope": 570,
+            "src": "1513:28:1",
+            "stateVariable": true,
+            "storageLocation": "default",
+            "typeDescriptions": {
+              "typeIdentifier": "t_uint256",
+              "typeString": "uint256"
+            },
+            "typeName": {
+              "id": 47,
+              "name": "uint256",
+              "nodeType": "ElementaryTypeName",
+              "src": "1513:7:1",
+              "typeDescriptions": {
+                "typeIdentifier": "t_uint256",
+                "typeString": "uint256"
+              }
+            },
+            "visibility": "private"
+          },
+          {
+            "constant": false,
+            "id": 50,
+            "mutability": "mutable",
+            "name": "_name",
+            "nameLocation": "1563:5:1",
+            "nodeType": "VariableDeclaration",
+            "scope": 570,
+            "src": "1548:20:1",
+            "stateVariable": true,
+            "storageLocation": "default",
+            "typeDescriptions": {
+              "typeIdentifier": "t_string_storage",
+              "typeString": "string"
+            },
+            "typeName": {
+              "id": 49,
+              "name": "string",
+              "nodeType": "ElementaryTypeName",
+              "src": "1548:6:1",
+              "typeDescriptions": {
+                "typeIdentifier": "t_string_storage_ptr",
+                "typeString": "string"
+              }
+            },
+            "visibility": "private"
+          },
+          {
+            "constant": false,
+            "id": 52,
+            "mutability": "mutable",
+            "name": "_symbol",
+            "nameLocation": "1589:7:1",
+            "nodeType": "VariableDeclaration",
+            "scope": 570,
+            "src": "1574:22:1",
+            "stateVariable": true,
+            "storageLocation": "default",
+            "typeDescriptions": {
+              "typeIdentifier": "t_string_storage",
+              "typeString": "string"
+            },
+            "typeName": {
+              "id": 51,
+              "name": "string",
+              "nodeType": "ElementaryTypeName",
+              "src": "1574:6:1",
+              "typeDescriptions": {
+                "typeIdentifier": "t_string_storage_ptr",
+                "typeString": "string"
+              }
+            },
+            "visibility": "private"
+          },
+          {
+            "body": {
+              "id": 68,
+              "nodeType": "Block",
+              "src": "1962:57:1",
+              "statements": [
+                {
+                  "expression": {
+                    "id": 62,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "lValueRequested": false,
+                    "leftHandSide": {
+                      "id": 60,
+                      "name": "_name",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 50,
+                      "src": "1972:5:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_string_storage",
+                        "typeString": "string storage ref"
+                      }
+                    },
+                    "nodeType": "Assignment",
+                    "operator": "=",
+                    "rightHandSide": {
+                      "id": 61,
+                      "name": "name_",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 55,
+                      "src": "1980:5:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_string_memory_ptr",
+                        "typeString": "string memory"
+                      }
+                    },
+                    "src": "1972:13:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage",
+                      "typeString": "string storage ref"
+                    }
+                  },
+                  "id": 63,
+                  "nodeType": "ExpressionStatement",
+                  "src": "1972:13:1"
+                },
+                {
+                  "expression": {
+                    "id": 66,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "lValueRequested": false,
+                    "leftHandSide": {
+                      "id": 64,
+                      "name": "_symbol",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 52,
+                      "src": "1995:7:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_string_storage",
+                        "typeString": "string storage ref"
+                      }
+                    },
+                    "nodeType": "Assignment",
+                    "operator": "=",
+                    "rightHandSide": {
+                      "id": 65,
+                      "name": "symbol_",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 57,
+                      "src": "2005:7:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_string_memory_ptr",
+                        "typeString": "string memory"
+                      }
+                    },
+                    "src": "1995:17:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage",
+                      "typeString": "string storage ref"
+                    }
+                  },
+                  "id": 67,
+                  "nodeType": "ExpressionStatement",
+                  "src": "1995:17:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 53,
+              "nodeType": "StructuredDocumentation",
+              "src": "1603:298:1",
+              "text": " @dev Sets the values for {name} and {symbol}.\n The default value of {decimals} is 18. To select a different value for\n {decimals} you should overload it.\n All two of these values are immutable: they can only be set once during\n construction."
+            },
+            "id": 69,
+            "implemented": true,
+            "kind": "constructor",
+            "modifiers": [],
+            "name": "",
+            "nameLocation": "-1:-1:-1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 58,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 55,
+                  "mutability": "mutable",
+                  "name": "name_",
+                  "nameLocation": "1932:5:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 69,
+                  "src": "1918:19:1",
+                  "stateVariable": false,
+                  "storageLocation": "memory",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
+                  },
+                  "typeName": {
+                    "id": 54,
+                    "name": "string",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1918:6:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 57,
+                  "mutability": "mutable",
+                  "name": "symbol_",
+                  "nameLocation": "1953:7:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 69,
+                  "src": "1939:21:1",
+                  "stateVariable": false,
+                  "storageLocation": "memory",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
+                  },
+                  "typeName": {
+                    "id": 56,
+                    "name": "string",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1939:6:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "1917:44:1"
+            },
+            "returnParameters": {
+              "id": 59,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "1962:0:1"
+            },
+            "scope": 570,
+            "src": "1906:113:1",
+            "stateMutability": "nonpayable",
+            "virtual": false,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              660
+            ],
+            "body": {
+              "id": 78,
+              "nodeType": "Block",
+              "src": "2153:29:1",
+              "statements": [
+                {
+                  "expression": {
+                    "id": 76,
+                    "name": "_name",
+                    "nodeType": "Identifier",
+                    "overloadedDeclarations": [],
+                    "referencedDeclaration": 50,
+                    "src": "2170:5:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage",
+                      "typeString": "string storage ref"
+                    }
+                  },
+                  "functionReturnParameters": 75,
+                  "id": 77,
+                  "nodeType": "Return",
+                  "src": "2163:12:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 70,
+              "nodeType": "StructuredDocumentation",
+              "src": "2025:54:1",
+              "text": " @dev Returns the name of the token."
+            },
+            "functionSelector": "06fdde03",
+            "id": 79,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "name",
+            "nameLocation": "2093:4:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 72,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "2120:8:1"
+            },
+            "parameters": {
+              "id": 71,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "2097:2:1"
+            },
+            "returnParameters": {
+              "id": 75,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 74,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 79,
+                  "src": "2138:13:1",
+                  "stateVariable": false,
+                  "storageLocation": "memory",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
+                  },
+                  "typeName": {
+                    "id": 73,
+                    "name": "string",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2138:6:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2137:15:1"
+            },
+            "scope": 570,
+            "src": "2084:98:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              666
+            ],
+            "body": {
+              "id": 88,
+              "nodeType": "Block",
+              "src": "2366:31:1",
+              "statements": [
+                {
+                  "expression": {
+                    "id": 86,
+                    "name": "_symbol",
+                    "nodeType": "Identifier",
+                    "overloadedDeclarations": [],
+                    "referencedDeclaration": 52,
+                    "src": "2383:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage",
+                      "typeString": "string storage ref"
+                    }
+                  },
+                  "functionReturnParameters": 85,
+                  "id": 87,
+                  "nodeType": "Return",
+                  "src": "2376:14:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 80,
+              "nodeType": "StructuredDocumentation",
+              "src": "2188:102:1",
+              "text": " @dev Returns the symbol of the token, usually a shorter version of the\n name."
+            },
+            "functionSelector": "95d89b41",
+            "id": 89,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "symbol",
+            "nameLocation": "2304:6:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 82,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "2333:8:1"
+            },
+            "parameters": {
+              "id": 81,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "2310:2:1"
+            },
+            "returnParameters": {
+              "id": 85,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 84,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 89,
+                  "src": "2351:13:1",
+                  "stateVariable": false,
+                  "storageLocation": "memory",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_string_memory_ptr",
+                    "typeString": "string"
+                  },
+                  "typeName": {
+                    "id": 83,
+                    "name": "string",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2351:6:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_string_storage_ptr",
+                      "typeString": "string"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2350:15:1"
+            },
+            "scope": 570,
+            "src": "2295:102:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              672
+            ],
+            "body": {
+              "id": 98,
+              "nodeType": "Block",
+              "src": "3086:26:1",
+              "statements": [
+                {
+                  "expression": {
+                    "hexValue": "3138",
+                    "id": 96,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": true,
+                    "kind": "number",
+                    "lValueRequested": false,
+                    "nodeType": "Literal",
+                    "src": "3103:2:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_rational_18_by_1",
+                      "typeString": "int_const 18"
+                    },
+                    "value": "18"
+                  },
+                  "functionReturnParameters": 95,
+                  "id": 97,
+                  "nodeType": "Return",
+                  "src": "3096:9:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 90,
+              "nodeType": "StructuredDocumentation",
+              "src": "2403:613:1",
+              "text": " @dev Returns the number of decimals used to get its user representation.\n For example, if `decimals` equals `2`, a balance of `505` tokens should\n be displayed to a user as `5.05` (`505 / 10 ** 2`).\n Tokens usually opt for a value of 18, imitating the relationship between\n Ether and Wei. This is the value {ERC20} uses, unless this function is\n overridden;\n NOTE: This information is only used for _display_ purposes: it in\n no way affects any of the arithmetic of the contract, including\n {IERC20-balanceOf} and {IERC20-transfer}."
+            },
+            "functionSelector": "313ce567",
+            "id": 99,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "decimals",
+            "nameLocation": "3030:8:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 92,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "3061:8:1"
+            },
+            "parameters": {
+              "id": 91,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "3038:2:1"
+            },
+            "returnParameters": {
+              "id": 95,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 94,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 99,
+                  "src": "3079:5:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint8",
+                    "typeString": "uint8"
+                  },
+                  "typeName": {
+                    "id": 93,
+                    "name": "uint8",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "3079:5:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint8",
+                      "typeString": "uint8"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "3078:7:1"
+            },
+            "scope": 570,
+            "src": "3021:91:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              579
+            ],
+            "body": {
+              "id": 108,
+              "nodeType": "Block",
+              "src": "3242:36:1",
+              "statements": [
+                {
+                  "expression": {
+                    "id": 106,
+                    "name": "_totalSupply",
+                    "nodeType": "Identifier",
+                    "overloadedDeclarations": [],
+                    "referencedDeclaration": 48,
+                    "src": "3259:12:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "functionReturnParameters": 105,
+                  "id": 107,
+                  "nodeType": "Return",
+                  "src": "3252:19:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 100,
+              "nodeType": "StructuredDocumentation",
+              "src": "3118:49:1",
+              "text": " @dev See {IERC20-totalSupply}."
+            },
+            "functionSelector": "18160ddd",
+            "id": 109,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "totalSupply",
+            "nameLocation": "3181:11:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 102,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "3215:8:1"
+            },
+            "parameters": {
+              "id": 101,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "3192:2:1"
+            },
+            "returnParameters": {
+              "id": 105,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 104,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 109,
+                  "src": "3233:7:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 103,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "3233:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "3232:9:1"
+            },
+            "scope": 570,
+            "src": "3172:106:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              587
+            ],
+            "body": {
+              "id": 122,
+              "nodeType": "Block",
+              "src": "3419:42:1",
+              "statements": [
+                {
+                  "expression": {
+                    "baseExpression": {
+                      "id": 118,
+                      "name": "_balances",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 40,
+                      "src": "3436:9:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
+                        "typeString": "mapping(address => uint256)"
+                      }
+                    },
+                    "id": 120,
+                    "indexExpression": {
+                      "id": 119,
+                      "name": "account",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 112,
+                      "src": "3446:7:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_address",
+                        "typeString": "address"
+                      }
+                    },
+                    "isConstant": false,
+                    "isLValue": true,
+                    "isPure": false,
+                    "lValueRequested": false,
+                    "nodeType": "IndexAccess",
+                    "src": "3436:18:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "functionReturnParameters": 117,
+                  "id": 121,
+                  "nodeType": "Return",
+                  "src": "3429:25:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 110,
+              "nodeType": "StructuredDocumentation",
+              "src": "3284:47:1",
+              "text": " @dev See {IERC20-balanceOf}."
+            },
+            "functionSelector": "70a08231",
+            "id": 123,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "balanceOf",
+            "nameLocation": "3345:9:1",
+            "nodeType": "FunctionDefinition",
+            "overrides": {
+              "id": 114,
+              "nodeType": "OverrideSpecifier",
+              "overrides": [],
+              "src": "3392:8:1"
+            },
+            "parameters": {
+              "id": 113,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 112,
+                  "mutability": "mutable",
+                  "name": "account",
+                  "nameLocation": "3363:7:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 123,
+                  "src": "3355:15:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 111,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "3355:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "3354:17:1"
+            },
+            "returnParameters": {
+              "id": 117,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 116,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 123,
+                  "src": "3410:7:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 115,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "3410:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "3409:9:1"
+            },
+            "scope": 570,
+            "src": "3336:125:1",
+            "stateMutability": "view",
+            "virtual": true,
+            "visibility": "public"
+          },
+          {
+            "baseFunctions": [
+              597
+            ],
+            "body": {
+              "id": 143,
+              "nodeType": "Block",
+              "src": "3756:80:1",
+              "statements": [
+                {
+                  "expression": {
+                    "arguments": [
+                      {
+                        "arguments": [],
+                        "expression": {
+                          "argumentTypes": [],
+                          "id": 135,
+                          "name": "_msgSender",
+                          "nodeType": "Identifier",
+                          "overloadedDeclarations": [],
+                          "referencedDeclaration": 685,
+                          "src": "3776:10:1",
+                          "typeDescriptions": {
+                            "typeIdentifier": "t_function_internal_view$__$returns$_t_address_$",
+                            "typeString": "function () view returns (address)"
+                          }
+                        },
+                        "id": 136,
+                        "isConstant": false,
+                        "isLValue": false,
+                        "isPure": false,
+                        "kind": "functionCall",
+                        "lValueRequested": false,
+                        "names": [],
+                        "nodeType": "FunctionCall",
+                        "src": "3776:12:1",
+                        "tryCall": false,
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 137,
+                        "name": "recipient",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 126,
+                        "src": "3790:9:1",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 138,
+                        "name": "amount",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 128,
+                        "src": "3801:6:1",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      }
+                    ],
+                    "expression": {
+                      "argumentTypes": [
+                        {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        },
+                        {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        },
+                        {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      ],
+                      "id": 134,
+                      "name": "_transfer",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 374,
+                      "src": "3766:9:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
+                        "typeString": "function (address,address,uint256)"
+                      }
+                    },
+                    "id": 139,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
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+                            "src": "5205:6:1",
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+                                "typeString": "uint256"
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+                            },
+                            "src": "5227:25:1",
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+                              "typeString": "uint256"
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+                              "typeString": "address"
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+              ]
+            },
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+              "nodeType": "StructuredDocumentation",
+              "src": "4353:456:1",
+              "text": " @dev See {IERC20-transferFrom}.\n Emits an {Approval} event indicating the updated allowance. This is not\n required by the EIP. See the note at the beginning of {ERC20}.\n Requirements:\n - `sender` and `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`.\n - the caller must have allowance for ``sender``'s tokens of at least\n `amount`."
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+              "src": "4932:8:1"
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+              "nodeType": "ParameterList",
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+                  "name": "sender",
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+                  "nodeType": "VariableDeclaration",
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+                  "storageLocation": "default",
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+                    "name": "address",
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+                      "typeString": "address"
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+                    "typeString": "bool"
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+                    "nodeType": "ElementaryTypeName",
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+                    "typeDescriptions": {
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+                  "visibility": "internal"
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+            "scope": 570,
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+            "stateMutability": "nonpayable",
+            "virtual": true,
+            "visibility": "public"
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+          {
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+                          "name": "_msgSender",
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+                          "referencedDeclaration": 685,
+                          "src": "5800:10:1",
+                          "typeDescriptions": {
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+                          "typeString": "address"
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+                      },
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+                        "name": "spender",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
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+                        "src": "5814:7:1",
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+                          "typeString": "address"
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+                      },
+                      {
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+                          "typeString": "uint256"
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+                              "name": "_allowances",
+                              "nodeType": "Identifier",
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+                              "src": "5823:11:1",
+                              "typeDescriptions": {
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+                                "typeString": "mapping(address => mapping(address => uint256))"
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+                                "src": "5835:10:1",
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+                                  "typeString": "function () view returns (address)"
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+                              "typeIdentifier": "t_mapping$_t_address_$_t_uint256_$",
+                              "typeString": "mapping(address => uint256)"
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+                            "name": "spender",
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+                          "name": "addedValue",
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+                          "typeString": "uint256"
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+            "documentation": {
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+              "nodeType": "StructuredDocumentation",
+              "src": "5298:384:1",
+              "text": " @dev Atomically increases the allowance granted to `spender` by the caller.\n This is an alternative to {approve} that can be used as a mitigation for\n problems described in {IERC20-approve}.\n Emits an {Approval} event indicating the updated allowance.\n Requirements:\n - `spender` cannot be the zero address."
+            },
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+                    "name": "address",
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+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
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+                  },
+                  "visibility": "internal"
+                },
+                {
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+                  "id": 236,
+                  "mutability": "mutable",
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+            "documentation": {
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+              "nodeType": "StructuredDocumentation",
+              "src": "6797:463:1",
+              "text": " @dev Moves `amount` of tokens from `sender` to `recipient`.\n This internal function is equivalent to {transfer}, and can be used to\n e.g. implement automatic token fees, slashing mechanisms, etc.\n Emits a {Transfer} event.\n Requirements:\n - `sender` cannot be the zero address.\n - `recipient` cannot be the zero address.\n - `sender` must have a balance of at least `amount`."
+            },
+            "id": 374,
+            "implemented": true,
+            "kind": "function",
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+            "name": "_transfer",
+            "nameLocation": "7274:9:1",
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+                  "mutability": "mutable",
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+                  "storageLocation": "default",
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+                    "typeString": "address"
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+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
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+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
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+                  "constant": false,
+                  "id": 302,
+                  "mutability": "mutable",
+                  "name": "recipient",
+                  "nameLocation": "7325:9:1",
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+                  "src": "7317:17:1",
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+                  "storageLocation": "default",
+                  "typeDescriptions": {
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+                    "typeString": "address"
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+                    "name": "address",
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+                    "src": "7317:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
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+                  "constant": false,
+                  "id": 304,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "7352:6:1",
+                  "nodeType": "VariableDeclaration",
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+                  "src": "7344:14:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
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+                    "typeString": "uint256"
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+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "7344:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
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+                  "visibility": "internal"
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+            },
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+              "src": "7382:0:1"
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+            "scope": 570,
+            "src": "7265:713:1",
+            "stateMutability": "nonpayable",
+            "virtual": true,
+            "visibility": "internal"
+          },
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+              "nodeType": "Block",
+              "src": "8319:324:1",
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+                        "typeString": "uint256"
+                      }
+                    },
+                    "src": "10242:36:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "id": 539,
+                  "nodeType": "ExpressionStatement",
+                  "src": "10242:36:1"
+                },
+                {
+                  "eventCall": {
+                    "arguments": [
+                      {
+                        "id": 541,
+                        "name": "owner",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 505,
+                        "src": "10302:5:1",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 542,
+                        "name": "spender",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 507,
+                        "src": "10309:7:1",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 543,
+                        "name": "amount",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 509,
+                        "src": "10318:6:1",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      }
+                    ],
+                    "expression": {
+                      "argumentTypes": [
+                        {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        },
+                        {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        },
+                        {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      ],
+                      "id": 540,
+                      "name": "Approval",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 647,
+                      "src": "10293:8:1",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_function_event_nonpayable$_t_address_$_t_address_$_t_uint256_$returns$__$",
+                        "typeString": "function (address,address,uint256)"
+                      }
+                    },
+                    "id": 544,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "kind": "functionCall",
+                    "lValueRequested": false,
+                    "names": [],
+                    "nodeType": "FunctionCall",
+                    "src": "10293:32:1",
+                    "tryCall": false,
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_tuple$__$",
+                      "typeString": "tuple()"
+                    }
+                  },
+                  "id": 545,
+                  "nodeType": "EmitStatement",
+                  "src": "10288:37:1"
+                }
+              ]
+            },
+            "documentation": {
+              "id": 503,
+              "nodeType": "StructuredDocumentation",
+              "src": "9545:412:1",
+              "text": " @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n This internal function is equivalent to `approve`, and can be used to\n e.g. set automatic allowances for certain subsystems, etc.\n Emits an {Approval} event.\n Requirements:\n - `owner` cannot be the zero address.\n - `spender` cannot be the zero address."
+            },
+            "id": 547,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_approve",
+            "nameLocation": "9971:8:1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 510,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 505,
+                  "mutability": "mutable",
+                  "name": "owner",
+                  "nameLocation": "9997:5:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 547,
+                  "src": "9989:13:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 504,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "9989:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 507,
+                  "mutability": "mutable",
+                  "name": "spender",
+                  "nameLocation": "10020:7:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 547,
+                  "src": "10012:15:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 506,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10012:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 509,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "10045:6:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 547,
+                  "src": "10037:14:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 508,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10037:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "9979:78:1"
+            },
+            "returnParameters": {
+              "id": 511,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "10075:0:1"
+            },
+            "scope": 570,
+            "src": "9962:370:1",
+            "stateMutability": "nonpayable",
+            "virtual": true,
+            "visibility": "internal"
+          },
+          {
+            "body": {
+              "id": 557,
+              "nodeType": "Block",
+              "src": "11035:2:1",
+              "statements": []
+            },
+            "documentation": {
+              "id": 548,
+              "nodeType": "StructuredDocumentation",
+              "src": "10338:573:1",
+              "text": " @dev Hook that is called before any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n will be transferred to `to`.\n - when `from` is zero, `amount` tokens will be minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]."
+            },
+            "id": 558,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_beforeTokenTransfer",
+            "nameLocation": "10925:20:1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 555,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 550,
+                  "mutability": "mutable",
+                  "name": "from",
+                  "nameLocation": "10963:4:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 558,
+                  "src": "10955:12:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 549,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10955:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 552,
+                  "mutability": "mutable",
+                  "name": "to",
+                  "nameLocation": "10985:2:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 558,
+                  "src": "10977:10:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 551,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10977:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 554,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "11005:6:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 558,
+                  "src": "10997:14:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 553,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "10997:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "10945:72:1"
+            },
+            "returnParameters": {
+              "id": 556,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "11035:0:1"
+            },
+            "scope": 570,
+            "src": "10916:121:1",
+            "stateMutability": "nonpayable",
+            "virtual": true,
+            "visibility": "internal"
+          },
+          {
+            "body": {
+              "id": 568,
+              "nodeType": "Block",
+              "src": "11743:2:1",
+              "statements": []
+            },
+            "documentation": {
+              "id": 559,
+              "nodeType": "StructuredDocumentation",
+              "src": "11043:577:1",
+              "text": " @dev Hook that is called after any transfer of tokens. This includes\n minting and burning.\n Calling conditions:\n - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n has been transferred to `to`.\n - when `from` is zero, `amount` tokens have been minted for `to`.\n - when `to` is zero, `amount` of ``from``'s tokens have been burned.\n - `from` and `to` are never both zero.\n To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]."
+            },
+            "id": 569,
+            "implemented": true,
+            "kind": "function",
+            "modifiers": [],
+            "name": "_afterTokenTransfer",
+            "nameLocation": "11634:19:1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 566,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 561,
+                  "mutability": "mutable",
+                  "name": "from",
+                  "nameLocation": "11671:4:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 569,
+                  "src": "11663:12:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 560,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "11663:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 563,
+                  "mutability": "mutable",
+                  "name": "to",
+                  "nameLocation": "11693:2:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 569,
+                  "src": "11685:10:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 562,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "11685:7:1",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 565,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "11713:6:1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 569,
+                  "src": "11705:14:1",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 564,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "11705:7:1",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "11653:72:1"
+            },
+            "returnParameters": {
+              "id": 567,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "11743:0:1"
+            },
+            "scope": 570,
+            "src": "11625:120:1",
+            "stateMutability": "nonpayable",
+            "virtual": true,
+            "visibility": "internal"
+          }
+        ],
+        "scope": 571,
+        "src": "1331:10416:1",
+        "usedErrors": []
+      }
+    ],
+    "src": "33:11715:1"
+  },
+  "compiler": {
+    "name": "solc",
+    "version": "0.8.7+commit.e28d00a7.Emscripten.clang"
+  },
+  "networks": {},
+  "schemaVersion": "3.4.3",
+  "updatedAt": "2021-09-26T18:37:54.234Z",
+  "devdoc": {
+    "details": "Implementation of the {IERC20} interface. This implementation is agnostic to the way tokens are created. This means that a supply mechanism has to be added in a derived contract using {_mint}. For a generic mechanism see {ERC20PresetMinterPauser}. TIP: For a detailed writeup see our guide https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How to implement supply mechanisms]. We have followed general OpenZeppelin Contracts guidelines: functions revert instead returning `false` on failure. This behavior is nonetheless conventional and does not conflict with the expectations of ERC20 applications. Additionally, an {Approval} event is emitted on calls to {transferFrom}. This allows applications to reconstruct the allowance for all accounts just by listening to said events. Other implementations of the EIP may not emit these events, as it isn't required by the specification. Finally, the non-standard {decreaseAllowance} and {increaseAllowance} functions have been added to mitigate the well-known issues around setting allowances. See {IERC20-approve}.",
+    "kind": "dev",
+    "methods": {
+      "allowance(address,address)": {
+        "details": "See {IERC20-allowance}."
+      },
+      "approve(address,uint256)": {
+        "details": "See {IERC20-approve}. Requirements: - `spender` cannot be the zero address."
+      },
+      "balanceOf(address)": {
+        "details": "See {IERC20-balanceOf}."
+      },
+      "constructor": {
+        "details": "Sets the values for {name} and {symbol}. The default value of {decimals} is 18. To select a different value for {decimals} you should overload it. All two of these values are immutable: they can only be set once during construction."
+      },
+      "decimals()": {
+        "details": "Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5.05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless this function is overridden; NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}."
+      },
+      "decreaseAllowance(address,uint256)": {
+        "details": "Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`."
+      },
+      "increaseAllowance(address,uint256)": {
+        "details": "Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address."
+      },
+      "name()": {
+        "details": "Returns the name of the token."
+      },
+      "symbol()": {
+        "details": "Returns the symbol of the token, usually a shorter version of the name."
+      },
+      "totalSupply()": {
+        "details": "See {IERC20-totalSupply}."
+      },
+      "transfer(address,uint256)": {
+        "details": "See {IERC20-transfer}. Requirements: - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`."
+      },
+      "transferFrom(address,address,uint256)": {
+        "details": "See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}. Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for ``sender``'s tokens of at least `amount`."
+      }
+    },
+    "version": 1
+  },
+  "userdoc": {
+    "kind": "user",
+    "methods": {},
+    "version": 1
+  }
+}
\ No newline at end of file
diff --git a/creating-erc20-token/build/contracts/IERC20.json b/creating-erc20-token/build/contracts/IERC20.json
new file mode 100644
index 0000000..80999e4
--- /dev/null
+++ b/creating-erc20-token/build/contracts/IERC20.json
@@ -0,0 +1,2067 @@
+{
+  "contractName": "IERC20",
+  "abi": [
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Approval",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Transfer",
+      "type": "event"
+    },
+    {
+      "inputs": [],
+      "name": "totalSupply",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "account",
+          "type": "address"
+        }
+      ],
+      "name": "balanceOf",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "transfer",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        }
+      ],
+      "name": "allowance",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "approve",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "sender",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    }
+  ],
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+              "src": "1804:6:2"
+            },
+            "scope": 648,
+            "src": "1737:74:2",
+            "stateMutability": "nonpayable",
+            "virtual": false,
+            "visibility": "external"
+          },
+          {
+            "documentation": {
+              "id": 618,
+              "nodeType": "StructuredDocumentation",
+              "src": "1817:296:2",
+              "text": " @dev Moves `amount` tokens from `sender` to `recipient` using the\n allowance mechanism. `amount` is then deducted from the caller's\n allowance.\n Returns a boolean value indicating whether the operation succeeded.\n Emits a {Transfer} event."
+            },
+            "functionSelector": "23b872dd",
+            "id": 629,
+            "implemented": false,
+            "kind": "function",
+            "modifiers": [],
+            "name": "transferFrom",
+            "nameLocation": "2127:12:2",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 625,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 620,
+                  "mutability": "mutable",
+                  "name": "sender",
+                  "nameLocation": "2157:6:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 629,
+                  "src": "2149:14:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 619,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2149:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 622,
+                  "mutability": "mutable",
+                  "name": "recipient",
+                  "nameLocation": "2181:9:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 629,
+                  "src": "2173:17:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 621,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2173:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 624,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "2208:6:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 629,
+                  "src": "2200:14:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 623,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2200:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2139:81:2"
+            },
+            "returnParameters": {
+              "id": 628,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 627,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 629,
+                  "src": "2239:4:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_bool",
+                    "typeString": "bool"
+                  },
+                  "typeName": {
+                    "id": 626,
+                    "name": "bool",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2239:4:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_bool",
+                      "typeString": "bool"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2238:6:2"
+            },
+            "scope": 648,
+            "src": "2118:127:2",
+            "stateMutability": "nonpayable",
+            "virtual": false,
+            "visibility": "external"
+          },
+          {
+            "anonymous": false,
+            "documentation": {
+              "id": 630,
+              "nodeType": "StructuredDocumentation",
+              "src": "2251:158:2",
+              "text": " @dev Emitted when `value` tokens are moved from one account (`from`) to\n another (`to`).\n Note that `value` may be zero."
+            },
+            "id": 638,
+            "name": "Transfer",
+            "nameLocation": "2420:8:2",
+            "nodeType": "EventDefinition",
+            "parameters": {
+              "id": 637,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 632,
+                  "indexed": true,
+                  "mutability": "mutable",
+                  "name": "from",
+                  "nameLocation": "2445:4:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 638,
+                  "src": "2429:20:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 631,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2429:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 634,
+                  "indexed": true,
+                  "mutability": "mutable",
+                  "name": "to",
+                  "nameLocation": "2467:2:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 638,
+                  "src": "2451:18:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 633,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2451:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 636,
+                  "indexed": false,
+                  "mutability": "mutable",
+                  "name": "value",
+                  "nameLocation": "2479:5:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 638,
+                  "src": "2471:13:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 635,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2471:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2428:57:2"
+            },
+            "src": "2414:72:2"
+          },
+          {
+            "anonymous": false,
+            "documentation": {
+              "id": 639,
+              "nodeType": "StructuredDocumentation",
+              "src": "2492:148:2",
+              "text": " @dev Emitted when the allowance of a `spender` for an `owner` is set by\n a call to {approve}. `value` is the new allowance."
+            },
+            "id": 647,
+            "name": "Approval",
+            "nameLocation": "2651:8:2",
+            "nodeType": "EventDefinition",
+            "parameters": {
+              "id": 646,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 641,
+                  "indexed": true,
+                  "mutability": "mutable",
+                  "name": "owner",
+                  "nameLocation": "2676:5:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 647,
+                  "src": "2660:21:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 640,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2660:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 643,
+                  "indexed": true,
+                  "mutability": "mutable",
+                  "name": "spender",
+                  "nameLocation": "2699:7:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 647,
+                  "src": "2683:23:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 642,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2683:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 645,
+                  "indexed": false,
+                  "mutability": "mutable",
+                  "name": "value",
+                  "nameLocation": "2716:5:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 647,
+                  "src": "2708:13:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 644,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2708:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2659:63:2"
+            },
+            "src": "2645:78:2"
+          }
+        ],
+        "scope": 649,
+        "src": "129:2596:2",
+        "usedErrors": []
+      }
+    ],
+    "src": "33:2693:2"
+  },
+  "legacyAST": {
+    "absolutePath": "project:/node_modules/@openzeppelin/contracts/token/ERC20/IERC20.sol",
+    "exportedSymbols": {
+      "IERC20": [
+        648
+      ]
+    },
+    "id": 649,
+    "license": "MIT",
+    "nodeType": "SourceUnit",
+    "nodes": [
+      {
+        "id": 572,
+        "literals": [
+          "solidity",
+          "^",
+          "0.8",
+          ".0"
+        ],
+        "nodeType": "PragmaDirective",
+        "src": "33:23:2"
+      },
+      {
+        "abstract": false,
+        "baseContracts": [],
+        "contractDependencies": [],
+        "contractKind": "interface",
+        "documentation": {
+          "id": 573,
+          "nodeType": "StructuredDocumentation",
+          "src": "58:70:2",
+          "text": " @dev Interface of the ERC20 standard as defined in the EIP."
+        },
+        "fullyImplemented": false,
+        "id": 648,
+        "linearizedBaseContracts": [
+          648
+        ],
+        "name": "IERC20",
+        "nameLocation": "139:6:2",
+        "nodeType": "ContractDefinition",
+        "nodes": [
+          {
+            "documentation": {
+              "id": 574,
+              "nodeType": "StructuredDocumentation",
+              "src": "152:66:2",
+              "text": " @dev Returns the amount of tokens in existence."
+            },
+            "functionSelector": "18160ddd",
+            "id": 579,
+            "implemented": false,
+            "kind": "function",
+            "modifiers": [],
+            "name": "totalSupply",
+            "nameLocation": "232:11:2",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 575,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "243:2:2"
+            },
+            "returnParameters": {
+              "id": 578,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 577,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 579,
+                  "src": "269:7:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 576,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "269:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "268:9:2"
+            },
+            "scope": 648,
+            "src": "223:55:2",
+            "stateMutability": "view",
+            "virtual": false,
+            "visibility": "external"
+          },
+          {
+            "documentation": {
+              "id": 580,
+              "nodeType": "StructuredDocumentation",
+              "src": "284:72:2",
+              "text": " @dev Returns the amount of tokens owned by `account`."
+            },
+            "functionSelector": "70a08231",
+            "id": 587,
+            "implemented": false,
+            "kind": "function",
+            "modifiers": [],
+            "name": "balanceOf",
+            "nameLocation": "370:9:2",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 583,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 582,
+                  "mutability": "mutable",
+                  "name": "account",
+                  "nameLocation": "388:7:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 587,
+                  "src": "380:15:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 581,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "380:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "379:17:2"
+            },
+            "returnParameters": {
+              "id": 586,
+              "nodeType": "ParameterList",
+              "parameters": [
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+                  "constant": false,
+                  "id": 585,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 587,
+                  "src": "420:7:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 584,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "420:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "419:9:2"
+            },
+            "scope": 648,
+            "src": "361:68:2",
+            "stateMutability": "view",
+            "virtual": false,
+            "visibility": "external"
+          },
+          {
+            "documentation": {
+              "id": 588,
+              "nodeType": "StructuredDocumentation",
+              "src": "435:209:2",
+              "text": " @dev Moves `amount` tokens from the caller's account to `recipient`.\n Returns a boolean value indicating whether the operation succeeded.\n Emits a {Transfer} event."
+            },
+            "functionSelector": "a9059cbb",
+            "id": 597,
+            "implemented": false,
+            "kind": "function",
+            "modifiers": [],
+            "name": "transfer",
+            "nameLocation": "658:8:2",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 593,
+              "nodeType": "ParameterList",
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+                  "constant": false,
+                  "id": 590,
+                  "mutability": "mutable",
+                  "name": "recipient",
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+                  "nodeType": "VariableDeclaration",
+                  "scope": 597,
+                  "src": "667:17:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
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+                    "id": 589,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "667:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 592,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "694:6:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 597,
+                  "src": "686:14:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 591,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "686:7:2",
+                    "typeDescriptions": {
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+                      "typeString": "uint256"
+                    }
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+                  "visibility": "internal"
+                }
+              ],
+              "src": "666:35:2"
+            },
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+              "nodeType": "ParameterList",
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+                  "id": 595,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 597,
+                  "src": "720:4:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_bool",
+                    "typeString": "bool"
+                  },
+                  "typeName": {
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+                    "name": "bool",
+                    "nodeType": "ElementaryTypeName",
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+                    "typeDescriptions": {
+                      "typeIdentifier": "t_bool",
+                      "typeString": "bool"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "719:6:2"
+            },
+            "scope": 648,
+            "src": "649:77:2",
+            "stateMutability": "nonpayable",
+            "virtual": false,
+            "visibility": "external"
+          },
+          {
+            "documentation": {
+              "id": 598,
+              "nodeType": "StructuredDocumentation",
+              "src": "732:264:2",
+              "text": " @dev Returns the remaining number of tokens that `spender` will be\n allowed to spend on behalf of `owner` through {transferFrom}. This is\n zero by default.\n This value changes when {approve} or {transferFrom} are called."
+            },
+            "functionSelector": "dd62ed3e",
+            "id": 607,
+            "implemented": false,
+            "kind": "function",
+            "modifiers": [],
+            "name": "allowance",
+            "nameLocation": "1010:9:2",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 603,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 600,
+                  "mutability": "mutable",
+                  "name": "owner",
+                  "nameLocation": "1028:5:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 607,
+                  "src": "1020:13:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 599,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1020:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 602,
+                  "mutability": "mutable",
+                  "name": "spender",
+                  "nameLocation": "1043:7:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 607,
+                  "src": "1035:15:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
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+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1035:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "1019:32:2"
+            },
+            "returnParameters": {
+              "id": 606,
+              "nodeType": "ParameterList",
+              "parameters": [
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+                  "id": 605,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 607,
+                  "src": "1075:7:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 604,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1075:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "1074:9:2"
+            },
+            "scope": 648,
+            "src": "1001:83:2",
+            "stateMutability": "view",
+            "virtual": false,
+            "visibility": "external"
+          },
+          {
+            "documentation": {
+              "id": 608,
+              "nodeType": "StructuredDocumentation",
+              "src": "1090:642:2",
+              "text": " @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n Returns a boolean value indicating whether the operation succeeded.\n IMPORTANT: Beware that changing an allowance with this method brings the risk\n that someone may use both the old and the new allowance by unfortunate\n transaction ordering. One possible solution to mitigate this race\n condition is to first reduce the spender's allowance to 0 and set the\n desired value afterwards:\n https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n Emits an {Approval} event."
+            },
+            "functionSelector": "095ea7b3",
+            "id": 617,
+            "implemented": false,
+            "kind": "function",
+            "modifiers": [],
+            "name": "approve",
+            "nameLocation": "1746:7:2",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 613,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 610,
+                  "mutability": "mutable",
+                  "name": "spender",
+                  "nameLocation": "1762:7:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 617,
+                  "src": "1754:15:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 609,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1754:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 612,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "1779:6:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 617,
+                  "src": "1771:14:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 611,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1771:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "1753:33:2"
+            },
+            "returnParameters": {
+              "id": 616,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 615,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 617,
+                  "src": "1805:4:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_bool",
+                    "typeString": "bool"
+                  },
+                  "typeName": {
+                    "id": 614,
+                    "name": "bool",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "1805:4:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_bool",
+                      "typeString": "bool"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "1804:6:2"
+            },
+            "scope": 648,
+            "src": "1737:74:2",
+            "stateMutability": "nonpayable",
+            "virtual": false,
+            "visibility": "external"
+          },
+          {
+            "documentation": {
+              "id": 618,
+              "nodeType": "StructuredDocumentation",
+              "src": "1817:296:2",
+              "text": " @dev Moves `amount` tokens from `sender` to `recipient` using the\n allowance mechanism. `amount` is then deducted from the caller's\n allowance.\n Returns a boolean value indicating whether the operation succeeded.\n Emits a {Transfer} event."
+            },
+            "functionSelector": "23b872dd",
+            "id": 629,
+            "implemented": false,
+            "kind": "function",
+            "modifiers": [],
+            "name": "transferFrom",
+            "nameLocation": "2127:12:2",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 625,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 620,
+                  "mutability": "mutable",
+                  "name": "sender",
+                  "nameLocation": "2157:6:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 629,
+                  "src": "2149:14:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 619,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2149:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 622,
+                  "mutability": "mutable",
+                  "name": "recipient",
+                  "nameLocation": "2181:9:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 629,
+                  "src": "2173:17:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 621,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2173:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 624,
+                  "mutability": "mutable",
+                  "name": "amount",
+                  "nameLocation": "2208:6:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 629,
+                  "src": "2200:14:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 623,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2200:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2139:81:2"
+            },
+            "returnParameters": {
+              "id": 628,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 627,
+                  "mutability": "mutable",
+                  "name": "",
+                  "nameLocation": "-1:-1:-1",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 629,
+                  "src": "2239:4:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_bool",
+                    "typeString": "bool"
+                  },
+                  "typeName": {
+                    "id": 626,
+                    "name": "bool",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2239:4:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_bool",
+                      "typeString": "bool"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2238:6:2"
+            },
+            "scope": 648,
+            "src": "2118:127:2",
+            "stateMutability": "nonpayable",
+            "virtual": false,
+            "visibility": "external"
+          },
+          {
+            "anonymous": false,
+            "documentation": {
+              "id": 630,
+              "nodeType": "StructuredDocumentation",
+              "src": "2251:158:2",
+              "text": " @dev Emitted when `value` tokens are moved from one account (`from`) to\n another (`to`).\n Note that `value` may be zero."
+            },
+            "id": 638,
+            "name": "Transfer",
+            "nameLocation": "2420:8:2",
+            "nodeType": "EventDefinition",
+            "parameters": {
+              "id": 637,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 632,
+                  "indexed": true,
+                  "mutability": "mutable",
+                  "name": "from",
+                  "nameLocation": "2445:4:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 638,
+                  "src": "2429:20:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 631,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2429:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 634,
+                  "indexed": true,
+                  "mutability": "mutable",
+                  "name": "to",
+                  "nameLocation": "2467:2:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 638,
+                  "src": "2451:18:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 633,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2451:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 636,
+                  "indexed": false,
+                  "mutability": "mutable",
+                  "name": "value",
+                  "nameLocation": "2479:5:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 638,
+                  "src": "2471:13:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 635,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2471:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2428:57:2"
+            },
+            "src": "2414:72:2"
+          },
+          {
+            "anonymous": false,
+            "documentation": {
+              "id": 639,
+              "nodeType": "StructuredDocumentation",
+              "src": "2492:148:2",
+              "text": " @dev Emitted when the allowance of a `spender` for an `owner` is set by\n a call to {approve}. `value` is the new allowance."
+            },
+            "id": 647,
+            "name": "Approval",
+            "nameLocation": "2651:8:2",
+            "nodeType": "EventDefinition",
+            "parameters": {
+              "id": 646,
+              "nodeType": "ParameterList",
+              "parameters": [
+                {
+                  "constant": false,
+                  "id": 641,
+                  "indexed": true,
+                  "mutability": "mutable",
+                  "name": "owner",
+                  "nameLocation": "2676:5:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 647,
+                  "src": "2660:21:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 640,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2660:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 643,
+                  "indexed": true,
+                  "mutability": "mutable",
+                  "name": "spender",
+                  "nameLocation": "2699:7:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 647,
+                  "src": "2683:23:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_address",
+                    "typeString": "address"
+                  },
+                  "typeName": {
+                    "id": 642,
+                    "name": "address",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2683:7:2",
+                    "stateMutability": "nonpayable",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_address",
+                      "typeString": "address"
+                    }
+                  },
+                  "visibility": "internal"
+                },
+                {
+                  "constant": false,
+                  "id": 645,
+                  "indexed": false,
+                  "mutability": "mutable",
+                  "name": "value",
+                  "nameLocation": "2716:5:2",
+                  "nodeType": "VariableDeclaration",
+                  "scope": 647,
+                  "src": "2708:13:2",
+                  "stateVariable": false,
+                  "storageLocation": "default",
+                  "typeDescriptions": {
+                    "typeIdentifier": "t_uint256",
+                    "typeString": "uint256"
+                  },
+                  "typeName": {
+                    "id": 644,
+                    "name": "uint256",
+                    "nodeType": "ElementaryTypeName",
+                    "src": "2708:7:2",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_uint256",
+                      "typeString": "uint256"
+                    }
+                  },
+                  "visibility": "internal"
+                }
+              ],
+              "src": "2659:63:2"
+            },
+            "src": "2645:78:2"
+          }
+        ],
+        "scope": 649,
+        "src": "129:2596:2",
+        "usedErrors": []
+      }
+    ],
+    "src": "33:2693:2"
+  },
+  "compiler": {
+    "name": "solc",
+    "version": "0.8.7+commit.e28d00a7.Emscripten.clang"
+  },
+  "networks": {},
+  "schemaVersion": "3.4.3",
+  "updatedAt": "2021-09-26T18:37:54.244Z",
+  "devdoc": {
+    "details": "Interface of the ERC20 standard as defined in the EIP.",
+    "events": {
+      "Approval(address,address,uint256)": {
+        "details": "Emitted when the allowance of a `spender` for an `owner` is set by a call to {approve}. `value` is the new allowance."
+      },
+      "Transfer(address,address,uint256)": {
+        "details": "Emitted when `value` tokens are moved from one account (`from`) to another (`to`). Note that `value` may be zero."
+      }
+    },
+    "kind": "dev",
+    "methods": {
+      "allowance(address,address)": {
+        "details": "Returns the remaining number of tokens that `spender` will be allowed to spend on behalf of `owner` through {transferFrom}. This is zero by default. This value changes when {approve} or {transferFrom} are called."
+      },
+      "approve(address,uint256)": {
+        "details": "Sets `amount` as the allowance of `spender` over the caller's tokens. Returns a boolean value indicating whether the operation succeeded. IMPORTANT: Beware that changing an allowance with this method brings the risk that someone may use both the old and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 Emits an {Approval} event."
+      },
+      "balanceOf(address)": {
+        "details": "Returns the amount of tokens owned by `account`."
+      },
+      "totalSupply()": {
+        "details": "Returns the amount of tokens in existence."
+      },
+      "transfer(address,uint256)": {
+        "details": "Moves `amount` tokens from the caller's account to `recipient`. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event."
+      },
+      "transferFrom(address,address,uint256)": {
+        "details": "Moves `amount` tokens from `sender` to `recipient` using the allowance mechanism. `amount` is then deducted from the caller's allowance. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event."
+      }
+    },
+    "version": 1
+  },
+  "userdoc": {
+    "kind": "user",
+    "methods": {},
+    "version": 1
+  }
+}
\ No newline at end of file
diff --git a/creating-erc20-token/build/contracts/IERC20Metadata.json b/creating-erc20-token/build/contracts/IERC20Metadata.json
new file mode 100644
index 0000000..9e6c3f6
--- /dev/null
+++ b/creating-erc20-token/build/contracts/IERC20Metadata.json
@@ -0,0 +1,807 @@
+{
+  "contractName": "IERC20Metadata",
+  "abi": [
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Approval",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Transfer",
+      "type": "event"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        }
+      ],
+      "name": "allowance",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "approve",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "account",
+          "type": "address"
+        }
+      ],
+      "name": "balanceOf",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "totalSupply",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "transfer",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "sender",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "name",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "symbol",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "decimals",
+      "outputs": [
+        {
+          "internalType": "uint8",
+          "name": "",
+          "type": "uint8"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    }
+  ],
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+      },
+      "transfer(address,uint256)": {
+        "details": "Moves `amount` tokens from the caller's account to `recipient`. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event."
+      },
+      "transferFrom(address,address,uint256)": {
+        "details": "Moves `amount` tokens from `sender` to `recipient` using the allowance mechanism. `amount` is then deducted from the caller's allowance. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event."
+      }
+    },
+    "version": 1
+  },
+  "userdoc": {
+    "kind": "user",
+    "methods": {},
+    "version": 1
+  }
+}
\ No newline at end of file
diff --git a/creating-erc20-token/build/contracts/MyERC20.json b/creating-erc20-token/build/contracts/MyERC20.json
new file mode 100644
index 0000000..afe25f3
--- /dev/null
+++ b/creating-erc20-token/build/contracts/MyERC20.json
@@ -0,0 +1,8560 @@
+{
+  "contractName": "MyERC20",
+  "abi": [
+    {
+      "inputs": [],
+      "stateMutability": "nonpayable",
+      "type": "constructor"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Approval",
+      "type": "event"
+    },
+    {
+      "anonymous": false,
+      "inputs": [
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "from",
+          "type": "address"
+        },
+        {
+          "indexed": true,
+          "internalType": "address",
+          "name": "to",
+          "type": "address"
+        },
+        {
+          "indexed": false,
+          "internalType": "uint256",
+          "name": "value",
+          "type": "uint256"
+        }
+      ],
+      "name": "Transfer",
+      "type": "event"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "owner",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        }
+      ],
+      "name": "allowance",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "approve",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "account",
+          "type": "address"
+        }
+      ],
+      "name": "balanceOf",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [],
+      "name": "decimals",
+      "outputs": [
+        {
+          "internalType": "uint8",
+          "name": "",
+          "type": "uint8"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "subtractedValue",
+          "type": "uint256"
+        }
+      ],
+      "name": "decreaseAllowance",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "spender",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "addedValue",
+          "type": "uint256"
+        }
+      ],
+      "name": "increaseAllowance",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [],
+      "name": "name",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [],
+      "name": "symbol",
+      "outputs": [
+        {
+          "internalType": "string",
+          "name": "",
+          "type": "string"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [],
+      "name": "totalSupply",
+      "outputs": [
+        {
+          "internalType": "uint256",
+          "name": "",
+          "type": "uint256"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function",
+      "constant": true
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "transfer",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "address",
+          "name": "sender",
+          "type": "address"
+        },
+        {
+          "internalType": "address",
+          "name": "recipient",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256",
+          "name": "amount",
+          "type": "uint256"
+        }
+      ],
+      "name": "transferFrom",
+      "outputs": [
+        {
+          "internalType": "bool",
+          "name": "",
+          "type": "bool"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    }
+  ],
+  "metadata": "{\"compiler\":{\"version\":\"0.8.7+commit.e28d00a7\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"subtractedValue\",\"type\":\"uint256\"}],\"name\":\"decreaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"addedValue\",\"type\":\"uint256\"}],\"name\":\"increaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"kind\":\"dev\",\"methods\":{\"allowance(address,address)\":{\"details\":\"See {IERC20-allowance}.\"},\"approve(address,uint256)\":{\"details\":\"See {IERC20-approve}. Requirements: - `spender` cannot be the zero address.\"},\"balanceOf(address)\":{\"details\":\"See {IERC20-balanceOf}.\"},\"decimals()\":{\"details\":\"Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5.05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless this function is overridden; NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}.\"},\"decreaseAllowance(address,uint256)\":{\"details\":\"Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`.\"},\"increaseAllowance(address,uint256)\":{\"details\":\"Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address.\"},\"name()\":{\"details\":\"Returns the name of the token.\"},\"symbol()\":{\"details\":\"Returns the symbol of the token, usually a shorter version of the name.\"},\"totalSupply()\":{\"details\":\"See {IERC20-totalSupply}.\"},\"transfer(address,uint256)\":{\"details\":\"See {IERC20-transfer}. Requirements: - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}. Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for ``sender``'s tokens of at least `amount`.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"project:/contracts/MyERC20.sol\":\"MyERC20\"},\"evmVersion\":\"london\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"project:/contracts/MyERC20.sol\":{\"keccak256\":\"0x461396e93ff7cd6b6fcf71692a14e2275d002066854e602bf2860fb57f0f8816\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://c4883306d8473b295ab03253b9518579956b70e8b4b5c513dbfea7a092497250\",\"dweb:/ipfs/QmTbbQY9Qj1ZkspFzry7UrreL5gicUgAF9ng4omM2EAkPT\"]},\"project:/node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol\":{\"keccak256\":\"0xb03df8481a954604ad0c9125680893b2e3f7ff770fe470e38b89ac61b84e8072\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://b34655953d18ba3a45b762fb6bdbb6549af69a27435e10ece178742bf70baf45\",\"dweb:/ipfs/QmcqjUoFLLMyx7dbwSHUnDBH6aphkVHXWQvQRRev5EAWEh\"]},\"project:/node_modules/@openzeppelin/contracts/token/ERC20/IERC20.sol\":{\"keccak256\":\"0x027b891937d20ccf213fdb9c31531574256de774bda99d3a70ecef6e1913ed2a\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://087318b21c528119f649899f5b5580566dd8d7b0303d4904bd0e8580c3545f14\",\"dweb:/ipfs/Qmbn5Mj7aUn8hJuQ8VrQjjEXRsXyJKykgnjR9p4C3nfLtL\"]},\"project:/node_modules/@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\":{\"keccak256\":\"0x83fe24f5c04a56091e50f4a345ff504c8bff658a76d4c43b16878c8f940c53b2\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://d4c3df1a7ca104b633a7d81c6c6f5192367d150cd5a32cba81f7f27012729013\",\"dweb:/ipfs/QmSim72e3ZVsfgZt8UceCvbiSuMRHR6WDsiamqNzZahGSY\"]},\"project:/node_modules/@openzeppelin/contracts/utils/Context.sol\":{\"keccak256\":\"0x90565a39ae45c80f0468dc96c7b20d0afc3055f344c8203a0c9258239f350b9f\",\"license\":\"MIT\",\"urls\":[\"bzz-raw://26e8b38a7ac8e7b4463af00cf7fff1bf48ae9875765bf4f7751e100124d0bc8c\",\"dweb:/ipfs/QmWcsmkVr24xmmjfnBQZoemFniXjj3vwT78Cz6uqZW1Hux\"]}},\"version\":1}",
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+      "contents": "{\n\n    function abi_encode_t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 31)\n        store_literal_in_memory_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e(pos)\n        end := add(pos, 32)\n    }\n\n    function abi_encode_t_uint256_to_t_uint256_fromStack(value, pos) {\n        mstore(pos, cleanup_t_uint256(value))\n    }\n\n    function abi_encode_tuple_t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function checked_add_t_uint256(x, y) -> sum {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n\n        // overflow, if x > (maxValue - y)\n        if gt(x, sub(0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, y)) { panic_error_0x11() }\n\n        sum := add(x, y)\n    }\n\n    function cleanup_t_uint256(value) -> cleaned {\n        cleaned := value\n    }\n\n    function extract_byte_array_length(data) -> length {\n        length := div(data, 2)\n        let outOfPlaceEncoding := and(data, 1)\n        if iszero(outOfPlaceEncoding) {\n            length := and(length, 0x7f)\n        }\n\n        if eq(outOfPlaceEncoding, lt(length, 32)) {\n            panic_error_0x22()\n        }\n    }\n\n    function panic_error_0x11() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x11)\n        revert(0, 0x24)\n    }\n\n    function panic_error_0x22() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x22)\n        revert(0, 0x24)\n    }\n\n    function store_literal_in_memory_fc0b381caf0a47702017f3c4b358ebe3d3aff6c60ce819a8bf3ef5a95d4f202e(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: mint to the zero address\")\n\n    }\n\n}\n",
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+                      "nodeType": "YulIdentifier",
+                      "src": "13840:6:5"
+                    },
+                    "nodeType": "YulFunctionCall",
+                    "src": "13840:43:5"
+                  },
+                  "nodeType": "YulIf",
+                  "src": "13837:63:5"
+                }
+              ]
+            },
+            "name": "validator_revert_t_uint256",
+            "nodeType": "YulFunctionDefinition",
+            "parameters": [
+              {
+                "name": "value",
+                "nodeType": "YulTypedName",
+                "src": "13820:5:5",
+                "type": ""
+              }
+            ],
+            "src": "13784:122:5"
+          }
+        ]
+      },
+      "contents": "{\n\n    function abi_decode_t_address(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_address(value)\n    }\n\n    function abi_decode_t_uint256(offset, end) -> value {\n        value := calldataload(offset)\n        validator_revert_t_uint256(value)\n    }\n\n    function abi_decode_tuple_t_address(headStart, dataEnd) -> value0 {\n        if slt(sub(dataEnd, headStart), 32) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_decode_tuple_t_addresst_address(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_decode_tuple_t_addresst_addresst_uint256(headStart, dataEnd) -> value0, value1, value2 {\n        if slt(sub(dataEnd, headStart), 96) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 64\n\n            value2 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_decode_tuple_t_addresst_uint256(headStart, dataEnd) -> value0, value1 {\n        if slt(sub(dataEnd, headStart), 64) { revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() }\n\n        {\n\n            let offset := 0\n\n            value0 := abi_decode_t_address(add(headStart, offset), dataEnd)\n        }\n\n        {\n\n            let offset := 32\n\n            value1 := abi_decode_t_uint256(add(headStart, offset), dataEnd)\n        }\n\n    }\n\n    function abi_encode_t_bool_to_t_bool_fromStack(value, pos) {\n        mstore(pos, cleanup_t_bool(value))\n    }\n\n    function abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value, pos) -> end {\n        let length := array_length_t_string_memory_ptr(value)\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length)\n        copy_memory_to_memory(add(value, 0x20), pos, length)\n        end := add(pos, round_up_to_mul_of_32(length))\n    }\n\n    function abi_encode_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 35)\n        store_literal_in_memory_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 34)\n        store_literal_in_memory_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 38)\n        store_literal_in_memory_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 40)\n        store_literal_in_memory_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 37)\n        store_literal_in_memory_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 36)\n        store_literal_in_memory_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8_to_t_string_memory_ptr_fromStack(pos) -> end {\n        pos := array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, 37)\n        store_literal_in_memory_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8(pos)\n        end := add(pos, 64)\n    }\n\n    function abi_encode_t_uint256_to_t_uint256_fromStack(value, pos) {\n        mstore(pos, cleanup_t_uint256(value))\n    }\n\n    function abi_encode_t_uint8_to_t_uint8_fromStack(value, pos) {\n        mstore(pos, cleanup_t_uint8(value))\n    }\n\n    function abi_encode_tuple_t_bool__to_t_bool__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_bool_to_t_bool_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function abi_encode_tuple_t_string_memory_ptr__to_t_string_memory_ptr__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_string_memory_ptr_to_t_string_memory_ptr_fromStack(value0,  tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8__to_t_string_memory_ptr__fromStack_reversed(headStart ) -> tail {\n        tail := add(headStart, 32)\n\n        mstore(add(headStart, 0), sub(tail, headStart))\n        tail := abi_encode_t_stringliteral_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8_to_t_string_memory_ptr_fromStack( tail)\n\n    }\n\n    function abi_encode_tuple_t_uint256__to_t_uint256__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_uint256_to_t_uint256_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function abi_encode_tuple_t_uint8__to_t_uint8__fromStack_reversed(headStart , value0) -> tail {\n        tail := add(headStart, 32)\n\n        abi_encode_t_uint8_to_t_uint8_fromStack(value0,  add(headStart, 0))\n\n    }\n\n    function allocate_unbounded() -> memPtr {\n        memPtr := mload(64)\n    }\n\n    function array_length_t_string_memory_ptr(value) -> length {\n\n        length := mload(value)\n\n    }\n\n    function array_storeLengthForEncoding_t_string_memory_ptr_fromStack(pos, length) -> updated_pos {\n        mstore(pos, length)\n        updated_pos := add(pos, 0x20)\n    }\n\n    function checked_add_t_uint256(x, y) -> sum {\n        x := cleanup_t_uint256(x)\n        y := cleanup_t_uint256(y)\n\n        // overflow, if x > (maxValue - y)\n        if gt(x, sub(0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff, y)) { panic_error_0x11() }\n\n        sum := add(x, y)\n    }\n\n    function cleanup_t_address(value) -> cleaned {\n        cleaned := cleanup_t_uint160(value)\n    }\n\n    function cleanup_t_bool(value) -> cleaned {\n        cleaned := iszero(iszero(value))\n    }\n\n    function cleanup_t_uint160(value) -> cleaned {\n        cleaned := and(value, 0xffffffffffffffffffffffffffffffffffffffff)\n    }\n\n    function cleanup_t_uint256(value) -> cleaned {\n        cleaned := value\n    }\n\n    function cleanup_t_uint8(value) -> cleaned {\n        cleaned := and(value, 0xff)\n    }\n\n    function copy_memory_to_memory(src, dst, length) {\n        let i := 0\n        for { } lt(i, length) { i := add(i, 32) }\n        {\n            mstore(add(dst, i), mload(add(src, i)))\n        }\n        if gt(i, length)\n        {\n            // clear end\n            mstore(add(dst, length), 0)\n        }\n    }\n\n    function extract_byte_array_length(data) -> length {\n        length := div(data, 2)\n        let outOfPlaceEncoding := and(data, 1)\n        if iszero(outOfPlaceEncoding) {\n            length := and(length, 0x7f)\n        }\n\n        if eq(outOfPlaceEncoding, lt(length, 32)) {\n            panic_error_0x22()\n        }\n    }\n\n    function panic_error_0x11() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x11)\n        revert(0, 0x24)\n    }\n\n    function panic_error_0x22() {\n        mstore(0, 35408467139433450592217433187231851964531694900788300625387963629091585785856)\n        mstore(4, 0x22)\n        revert(0, 0x24)\n    }\n\n    function revert_error_c1322bf8034eace5e0b5c7295db60986aa89aae5e0ea0873e4689e076861a5db() {\n        revert(0, 0)\n    }\n\n    function revert_error_dbdddcbe895c83990c08b3492a0e83918d802a52331272ac6fdb6a7c4aea3b1b() {\n        revert(0, 0)\n    }\n\n    function round_up_to_mul_of_32(value) -> result {\n        result := and(add(value, 31), not(31))\n    }\n\n    function store_literal_in_memory_0557e210f7a69a685100a7e4e3d0a7024c546085cee28910fd17d0b081d9516f(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: transfer to the zero addr\")\n\n        mstore(add(memPtr, 32), \"ess\")\n\n    }\n\n    function store_literal_in_memory_24883cc5fe64ace9d0df1893501ecb93c77180f0ff69cca79affb3c316dc8029(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: approve to the zero addre\")\n\n        mstore(add(memPtr, 32), \"ss\")\n\n    }\n\n    function store_literal_in_memory_4107e8a8b9e94bf8ff83080ddec1c0bffe897ebc2241b89d44f66b3d274088b6(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: transfer amount exceeds b\")\n\n        mstore(add(memPtr, 32), \"alance\")\n\n    }\n\n    function store_literal_in_memory_974d1b4421da69cc60b481194f0dad36a5bb4e23da810da7a7fb30cdba178330(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: transfer amount exceeds a\")\n\n        mstore(add(memPtr, 32), \"llowance\")\n\n    }\n\n    function store_literal_in_memory_baecc556b46f4ed0f2b4cb599d60785ac8563dd2dc0a5bf12edea1c39e5e1fea(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: transfer from the zero ad\")\n\n        mstore(add(memPtr, 32), \"dress\")\n\n    }\n\n    function store_literal_in_memory_c953f4879035ed60e766b34720f656aab5c697b141d924c283124ecedb91c208(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: approve from the zero add\")\n\n        mstore(add(memPtr, 32), \"ress\")\n\n    }\n\n    function store_literal_in_memory_f8b476f7d28209d77d4a4ac1fe36b9f8259aa1bb6bddfa6e89de7e51615cf8a8(memPtr) {\n\n        mstore(add(memPtr, 0), \"ERC20: decreased allowance below\")\n\n        mstore(add(memPtr, 32), \" zero\")\n\n    }\n\n    function validator_revert_t_address(value) {\n        if iszero(eq(value, cleanup_t_address(value))) { revert(0, 0) }\n    }\n\n    function validator_revert_t_uint256(value) {\n        if iszero(eq(value, cleanup_t_uint256(value))) { revert(0, 0) }\n    }\n\n}\n",
+      "id": 5,
+      "language": "Yul",
+      "name": "#utility.yul"
+    }
+  ],
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+  "source": "// SPDX-License-Identifier: MIT\npragma solidity >=0.4.22 <0.9.0;\n\nimport {ERC20} from \"../node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol\";\n\ncontract MyERC20 is ERC20 {\n\n    constructor () ERC20(\"MyERC20\", \"MYERC\") {\n      uint256 _initialSupply = 1_000_000; // 1 million\n      _mint(msg.sender, _initialSupply); \n    }\n\n}\n",
+  "sourcePath": "D:\\Block-Chain\\defi-dapps-solidity-smart-contracts\\creating-erc20-token\\contracts\\MyERC20.sol",
+  "ast": {
+    "absolutePath": "project:/contracts/MyERC20.sol",
+    "exportedSymbols": {
+      "ERC20": [
+        570
+      ],
+      "MyERC20": [
+        24
+      ]
+    },
+    "id": 25,
+    "license": "MIT",
+    "nodeType": "SourceUnit",
+    "nodes": [
+      {
+        "id": 1,
+        "literals": [
+          "solidity",
+          ">=",
+          "0.4",
+          ".22",
+          "<",
+          "0.9",
+          ".0"
+        ],
+        "nodeType": "PragmaDirective",
+        "src": "32:32:0"
+      },
+      {
+        "absolutePath": "project:/node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol",
+        "file": "../node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol",
+        "id": 3,
+        "nameLocation": "-1:-1:-1",
+        "nodeType": "ImportDirective",
+        "scope": 25,
+        "sourceUnit": 571,
+        "src": "66:84:0",
+        "symbolAliases": [
+          {
+            "foreign": {
+              "id": 2,
+              "name": "ERC20",
+              "nodeType": "Identifier",
+              "overloadedDeclarations": [],
+              "src": "74:5:0",
+              "typeDescriptions": {}
+            },
+            "nameLocation": "-1:-1:-1"
+          }
+        ],
+        "unitAlias": ""
+      },
+      {
+        "abstract": false,
+        "baseContracts": [
+          {
+            "baseName": {
+              "id": 4,
+              "name": "ERC20",
+              "nodeType": "IdentifierPath",
+              "referencedDeclaration": 570,
+              "src": "172:5:0"
+            },
+            "id": 5,
+            "nodeType": "InheritanceSpecifier",
+            "src": "172:5:0"
+          }
+        ],
+        "contractDependencies": [],
+        "contractKind": "contract",
+        "fullyImplemented": true,
+        "id": 24,
+        "linearizedBaseContracts": [
+          24,
+          570,
+          673,
+          648,
+          695
+        ],
+        "name": "MyERC20",
+        "nameLocation": "161:7:0",
+        "nodeType": "ContractDefinition",
+        "nodes": [
+          {
+            "body": {
+              "id": 22,
+              "nodeType": "Block",
+              "src": "226:104:0",
+              "statements": [
+                {
+                  "assignments": [
+                    13
+                  ],
+                  "declarations": [
+                    {
+                      "constant": false,
+                      "id": 13,
+                      "mutability": "mutable",
+                      "name": "_initialSupply",
+                      "nameLocation": "242:14:0",
+                      "nodeType": "VariableDeclaration",
+                      "scope": 22,
+                      "src": "234:22:0",
+                      "stateVariable": false,
+                      "storageLocation": "default",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_uint256",
+                        "typeString": "uint256"
+                      },
+                      "typeName": {
+                        "id": 12,
+                        "name": "uint256",
+                        "nodeType": "ElementaryTypeName",
+                        "src": "234:7:0",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      },
+                      "visibility": "internal"
+                    }
+                  ],
+                  "id": 15,
+                  "initialValue": {
+                    "hexValue": "315f3030305f303030",
+                    "id": 14,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": true,
+                    "kind": "number",
+                    "lValueRequested": false,
+                    "nodeType": "Literal",
+                    "src": "259:9:0",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_rational_1000000_by_1",
+                      "typeString": "int_const 1000000"
+                    },
+                    "value": "1_000_000"
+                  },
+                  "nodeType": "VariableDeclarationStatement",
+                  "src": "234:34:0"
+                },
+                {
+                  "expression": {
+                    "arguments": [
+                      {
+                        "expression": {
+                          "id": 17,
+                          "name": "msg",
+                          "nodeType": "Identifier",
+                          "overloadedDeclarations": [],
+                          "referencedDeclaration": 4294967281,
+                          "src": "295:3:0",
+                          "typeDescriptions": {
+                            "typeIdentifier": "t_magic_message",
+                            "typeString": "msg"
+                          }
+                        },
+                        "id": 18,
+                        "isConstant": false,
+                        "isLValue": false,
+                        "isPure": false,
+                        "lValueRequested": false,
+                        "memberName": "sender",
+                        "nodeType": "MemberAccess",
+                        "src": "295:10:0",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 19,
+                        "name": "_initialSupply",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 13,
+                        "src": "307:14:0",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      }
+                    ],
+                    "expression": {
+                      "argumentTypes": [
+                        {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        },
+                        {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      ],
+                      "id": 16,
+                      "name": "_mint",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 430,
+                      "src": "289:5:0",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$",
+                        "typeString": "function (address,uint256)"
+                      }
+                    },
+                    "id": 20,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "kind": "functionCall",
+                    "lValueRequested": false,
+                    "names": [],
+                    "nodeType": "FunctionCall",
+                    "src": "289:33:0",
+                    "tryCall": false,
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_tuple$__$",
+                      "typeString": "tuple()"
+                    }
+                  },
+                  "id": 21,
+                  "nodeType": "ExpressionStatement",
+                  "src": "289:33:0"
+                }
+              ]
+            },
+            "id": 23,
+            "implemented": true,
+            "kind": "constructor",
+            "modifiers": [
+              {
+                "arguments": [
+                  {
+                    "hexValue": "4d794552433230",
+                    "id": 8,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": true,
+                    "kind": "string",
+                    "lValueRequested": false,
+                    "nodeType": "Literal",
+                    "src": "206:9:0",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_stringliteral_c9735432a94c01a25d6df614a93e9a68ab72969b11f8d9a1b07706aa466c54ec",
+                      "typeString": "literal_string \"MyERC20\""
+                    },
+                    "value": "MyERC20"
+                  },
+                  {
+                    "hexValue": "4d59455243",
+                    "id": 9,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": true,
+                    "kind": "string",
+                    "lValueRequested": false,
+                    "nodeType": "Literal",
+                    "src": "217:7:0",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_stringliteral_e2d34778e0d04650b6ae143cc680fa1bba4b51e09e430547721d79ccfe2b1527",
+                      "typeString": "literal_string \"MYERC\""
+                    },
+                    "value": "MYERC"
+                  }
+                ],
+                "id": 10,
+                "kind": "baseConstructorSpecifier",
+                "modifierName": {
+                  "id": 7,
+                  "name": "ERC20",
+                  "nodeType": "IdentifierPath",
+                  "referencedDeclaration": 570,
+                  "src": "200:5:0"
+                },
+                "nodeType": "ModifierInvocation",
+                "src": "200:25:0"
+              }
+            ],
+            "name": "",
+            "nameLocation": "-1:-1:-1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 6,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "197:2:0"
+            },
+            "returnParameters": {
+              "id": 11,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "226:0:0"
+            },
+            "scope": 24,
+            "src": "185:145:0",
+            "stateMutability": "nonpayable",
+            "virtual": false,
+            "visibility": "public"
+          }
+        ],
+        "scope": 25,
+        "src": "152:181:0",
+        "usedErrors": []
+      }
+    ],
+    "src": "32:302:0"
+  },
+  "legacyAST": {
+    "absolutePath": "project:/contracts/MyERC20.sol",
+    "exportedSymbols": {
+      "ERC20": [
+        570
+      ],
+      "MyERC20": [
+        24
+      ]
+    },
+    "id": 25,
+    "license": "MIT",
+    "nodeType": "SourceUnit",
+    "nodes": [
+      {
+        "id": 1,
+        "literals": [
+          "solidity",
+          ">=",
+          "0.4",
+          ".22",
+          "<",
+          "0.9",
+          ".0"
+        ],
+        "nodeType": "PragmaDirective",
+        "src": "32:32:0"
+      },
+      {
+        "absolutePath": "project:/node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol",
+        "file": "../node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol",
+        "id": 3,
+        "nameLocation": "-1:-1:-1",
+        "nodeType": "ImportDirective",
+        "scope": 25,
+        "sourceUnit": 571,
+        "src": "66:84:0",
+        "symbolAliases": [
+          {
+            "foreign": {
+              "id": 2,
+              "name": "ERC20",
+              "nodeType": "Identifier",
+              "overloadedDeclarations": [],
+              "src": "74:5:0",
+              "typeDescriptions": {}
+            },
+            "nameLocation": "-1:-1:-1"
+          }
+        ],
+        "unitAlias": ""
+      },
+      {
+        "abstract": false,
+        "baseContracts": [
+          {
+            "baseName": {
+              "id": 4,
+              "name": "ERC20",
+              "nodeType": "IdentifierPath",
+              "referencedDeclaration": 570,
+              "src": "172:5:0"
+            },
+            "id": 5,
+            "nodeType": "InheritanceSpecifier",
+            "src": "172:5:0"
+          }
+        ],
+        "contractDependencies": [],
+        "contractKind": "contract",
+        "fullyImplemented": true,
+        "id": 24,
+        "linearizedBaseContracts": [
+          24,
+          570,
+          673,
+          648,
+          695
+        ],
+        "name": "MyERC20",
+        "nameLocation": "161:7:0",
+        "nodeType": "ContractDefinition",
+        "nodes": [
+          {
+            "body": {
+              "id": 22,
+              "nodeType": "Block",
+              "src": "226:104:0",
+              "statements": [
+                {
+                  "assignments": [
+                    13
+                  ],
+                  "declarations": [
+                    {
+                      "constant": false,
+                      "id": 13,
+                      "mutability": "mutable",
+                      "name": "_initialSupply",
+                      "nameLocation": "242:14:0",
+                      "nodeType": "VariableDeclaration",
+                      "scope": 22,
+                      "src": "234:22:0",
+                      "stateVariable": false,
+                      "storageLocation": "default",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_uint256",
+                        "typeString": "uint256"
+                      },
+                      "typeName": {
+                        "id": 12,
+                        "name": "uint256",
+                        "nodeType": "ElementaryTypeName",
+                        "src": "234:7:0",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      },
+                      "visibility": "internal"
+                    }
+                  ],
+                  "id": 15,
+                  "initialValue": {
+                    "hexValue": "315f3030305f303030",
+                    "id": 14,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": true,
+                    "kind": "number",
+                    "lValueRequested": false,
+                    "nodeType": "Literal",
+                    "src": "259:9:0",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_rational_1000000_by_1",
+                      "typeString": "int_const 1000000"
+                    },
+                    "value": "1_000_000"
+                  },
+                  "nodeType": "VariableDeclarationStatement",
+                  "src": "234:34:0"
+                },
+                {
+                  "expression": {
+                    "arguments": [
+                      {
+                        "expression": {
+                          "id": 17,
+                          "name": "msg",
+                          "nodeType": "Identifier",
+                          "overloadedDeclarations": [],
+                          "referencedDeclaration": 4294967281,
+                          "src": "295:3:0",
+                          "typeDescriptions": {
+                            "typeIdentifier": "t_magic_message",
+                            "typeString": "msg"
+                          }
+                        },
+                        "id": 18,
+                        "isConstant": false,
+                        "isLValue": false,
+                        "isPure": false,
+                        "lValueRequested": false,
+                        "memberName": "sender",
+                        "nodeType": "MemberAccess",
+                        "src": "295:10:0",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        }
+                      },
+                      {
+                        "id": 19,
+                        "name": "_initialSupply",
+                        "nodeType": "Identifier",
+                        "overloadedDeclarations": [],
+                        "referencedDeclaration": 13,
+                        "src": "307:14:0",
+                        "typeDescriptions": {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      }
+                    ],
+                    "expression": {
+                      "argumentTypes": [
+                        {
+                          "typeIdentifier": "t_address",
+                          "typeString": "address"
+                        },
+                        {
+                          "typeIdentifier": "t_uint256",
+                          "typeString": "uint256"
+                        }
+                      ],
+                      "id": 16,
+                      "name": "_mint",
+                      "nodeType": "Identifier",
+                      "overloadedDeclarations": [],
+                      "referencedDeclaration": 430,
+                      "src": "289:5:0",
+                      "typeDescriptions": {
+                        "typeIdentifier": "t_function_internal_nonpayable$_t_address_$_t_uint256_$returns$__$",
+                        "typeString": "function (address,uint256)"
+                      }
+                    },
+                    "id": 20,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": false,
+                    "kind": "functionCall",
+                    "lValueRequested": false,
+                    "names": [],
+                    "nodeType": "FunctionCall",
+                    "src": "289:33:0",
+                    "tryCall": false,
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_tuple$__$",
+                      "typeString": "tuple()"
+                    }
+                  },
+                  "id": 21,
+                  "nodeType": "ExpressionStatement",
+                  "src": "289:33:0"
+                }
+              ]
+            },
+            "id": 23,
+            "implemented": true,
+            "kind": "constructor",
+            "modifiers": [
+              {
+                "arguments": [
+                  {
+                    "hexValue": "4d794552433230",
+                    "id": 8,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": true,
+                    "kind": "string",
+                    "lValueRequested": false,
+                    "nodeType": "Literal",
+                    "src": "206:9:0",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_stringliteral_c9735432a94c01a25d6df614a93e9a68ab72969b11f8d9a1b07706aa466c54ec",
+                      "typeString": "literal_string \"MyERC20\""
+                    },
+                    "value": "MyERC20"
+                  },
+                  {
+                    "hexValue": "4d59455243",
+                    "id": 9,
+                    "isConstant": false,
+                    "isLValue": false,
+                    "isPure": true,
+                    "kind": "string",
+                    "lValueRequested": false,
+                    "nodeType": "Literal",
+                    "src": "217:7:0",
+                    "typeDescriptions": {
+                      "typeIdentifier": "t_stringliteral_e2d34778e0d04650b6ae143cc680fa1bba4b51e09e430547721d79ccfe2b1527",
+                      "typeString": "literal_string \"MYERC\""
+                    },
+                    "value": "MYERC"
+                  }
+                ],
+                "id": 10,
+                "kind": "baseConstructorSpecifier",
+                "modifierName": {
+                  "id": 7,
+                  "name": "ERC20",
+                  "nodeType": "IdentifierPath",
+                  "referencedDeclaration": 570,
+                  "src": "200:5:0"
+                },
+                "nodeType": "ModifierInvocation",
+                "src": "200:25:0"
+              }
+            ],
+            "name": "",
+            "nameLocation": "-1:-1:-1",
+            "nodeType": "FunctionDefinition",
+            "parameters": {
+              "id": 6,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "197:2:0"
+            },
+            "returnParameters": {
+              "id": 11,
+              "nodeType": "ParameterList",
+              "parameters": [],
+              "src": "226:0:0"
+            },
+            "scope": 24,
+            "src": "185:145:0",
+            "stateMutability": "nonpayable",
+            "virtual": false,
+            "visibility": "public"
+          }
+        ],
+        "scope": 25,
+        "src": "152:181:0",
+        "usedErrors": []
+      }
+    ],
+    "src": "32:302:0"
+  },
+  "compiler": {
+    "name": "solc",
+    "version": "0.8.7+commit.e28d00a7.Emscripten.clang"
+  },
+  "networks": {
+    "5777": {
+      "events": {},
+      "links": {},
+      "address": "0xA260f3b1Fc013B45B8C63C838D57B66895133b09",
+      "transactionHash": "0x5811ff5ce8a5658bb6d28c646f80ffd65d54004782277cda935931e043d06e9f"
+    }
+  },
+  "schemaVersion": "3.4.3",
+  "updatedAt": "2021-09-26T18:38:07.818Z",
+  "networkType": "ethereum",
+  "devdoc": {
+    "kind": "dev",
+    "methods": {
+      "allowance(address,address)": {
+        "details": "See {IERC20-allowance}."
+      },
+      "approve(address,uint256)": {
+        "details": "See {IERC20-approve}. Requirements: - `spender` cannot be the zero address."
+      },
+      "balanceOf(address)": {
+        "details": "See {IERC20-balanceOf}."
+      },
+      "decimals()": {
+        "details": "Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5.05` (`505 / 10 ** 2`). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. This is the value {ERC20} uses, unless this function is overridden; NOTE: This information is only used for _display_ purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}."
+      },
+      "decreaseAllowance(address,uint256)": {
+        "details": "Atomically decreases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address. - `spender` must have allowance for the caller of at least `subtractedValue`."
+      },
+      "increaseAllowance(address,uint256)": {
+        "details": "Atomically increases the allowance granted to `spender` by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - `spender` cannot be the zero address."
+      },
+      "name()": {
+        "details": "Returns the name of the token."
+      },
+      "symbol()": {
+        "details": "Returns the symbol of the token, usually a shorter version of the name."
+      },
+      "totalSupply()": {
+        "details": "See {IERC20-totalSupply}."
+      },
+      "transfer(address,uint256)": {
+        "details": "See {IERC20-transfer}. Requirements: - `recipient` cannot be the zero address. - the caller must have a balance of at least `amount`."
+      },
+      "transferFrom(address,address,uint256)": {
+        "details": "See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}. Requirements: - `sender` and `recipient` cannot be the zero address. - `sender` must have a balance of at least `amount`. - the caller must have allowance for ``sender``'s tokens of at least `amount`."
+      }
+    },
+    "version": 1
+  },
+  "userdoc": {
+    "kind": "user",
+    "methods": {},
+    "version": 1
+  }
+}
\ No newline at end of file
diff --git a/creating-erc20-token/contracts/MyERC20.sol b/creating-erc20-token/contracts/MyERC20.sol
new file mode 100644
index 0000000..0500a39
--- /dev/null
+++ b/creating-erc20-token/contracts/MyERC20.sol
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: MIT
+pragma solidity >=0.4.22 <0.9.0;
+
+import {ERC20} from "../node_modules/@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract MyERC20 is ERC20 {
+
+    constructor () ERC20("MyERC20", "MYERC") {
+      uint256 _initialSupply = 1_000_000; // 1 million
+      _mint(msg.sender, _initialSupply); 
+    }
+
+}
diff --git a/creating-erc20-token/migrations/1_deploy_contracts.js b/creating-erc20-token/migrations/1_deploy_contracts.js
new file mode 100644
index 0000000..c8dd46f
--- /dev/null
+++ b/creating-erc20-token/migrations/1_deploy_contracts.js
@@ -0,0 +1,5 @@
+const MyERC20 = artifacts.require("MyERC20");
+
+module.exports = function (deployer) {
+  deployer.deploy(MyERC20);
+};
diff --git a/creating-erc20-token/package-lock.json b/creating-erc20-token/package-lock.json
new file mode 100644
index 0000000..368e929
--- /dev/null
+++ b/creating-erc20-token/package-lock.json
@@ -0,0 +1,13 @@
+{
+  "name": "creating-erc20-token",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "@openzeppelin/contracts": {
+      "version": "4.3.2",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-4.3.2.tgz",
+      "integrity": "sha512-AybF1cesONZStg5kWf6ao9OlqTZuPqddvprc0ky7lrUVOjXeKpmQ2Y9FK+6ygxasb+4aic4O5pneFBfwVsRRRg=="
+    }
+  }
+}
diff --git a/creating-erc20-token/package.json b/creating-erc20-token/package.json
new file mode 100644
index 0000000..45fc993
--- /dev/null
+++ b/creating-erc20-token/package.json
@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "@openzeppelin/contracts": "^4.3.2"
+  }
+}
\ No newline at end of file
diff --git a/creating-erc20-token/test/.gitkeep b/creating-erc20-token/test/.gitkeep
new file mode 100644
index 0000000..e69de29
diff --git a/creating-erc20-token/test/MyERC20.test.js b/creating-erc20-token/test/MyERC20.test.js
new file mode 100644
index 0000000..e06cc84
--- /dev/null
+++ b/creating-erc20-token/test/MyERC20.test.js
@@ -0,0 +1,15 @@
+const MyERC20 = artifacts.require("MyERC20");
+
+contract("MyERC20", ()=> {
+    it("Should have 1million tokens in totalsupply", async () => {
+        const contract = await MyERC20.new();
+        const data = await contract.totalSupply();
+        assert(data.toString() === "1000000");
+    });
+    // it("Should Return a Block Number", async () => {
+    //     const contract = await LearningSolidity.new();
+    //     const data = await contract.getBlockNumber();
+    //     assert(Number.isInteger(data.toNumber()));
+    // });
+
+});
\ No newline at end of file
diff --git a/creating-erc20-token/truffle-config.js b/creating-erc20-token/truffle-config.js
new file mode 100644
index 0000000..697de5a
--- /dev/null
+++ b/creating-erc20-token/truffle-config.js
@@ -0,0 +1,16 @@
+module.exports = {
+  networks: {
+    development: {
+      host: "127.0.0.1",     // Localhost (default: none)
+      port: 8545,            // Standard Ethereum port (default: none)
+      network_id: "*",       // Any network (default: none)
+    },
+  },
+
+  // Configure your compilers
+  compilers: {
+    solc: {
+      version: ">=0.4.22 <0.9.0",
+    }
+  },
+};