feat: add example

example/sendUserOp/README.md

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+# Send your first gasless transaction
+

example/sendUserOp/index.ts

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+import { concat, encodeFunctionData, createPublicClient, http, createClient } from 'viem';
+import { sepolia } from 'viem/chains';
+import { generatePrivateKey, privateKeyToAccount } from 'viem/accounts';
+
+import {
+    UserOperation,
+    bundlerActions,
+    getAccountNonce,
+    signUserOperationHashWithECDSA,
+    getSenderAddress
+} from "permissionless"
+import { pimlicoBundlerActions } from "permissionless/actions/pimlico"
+
+import { init, health, auth, getSupportEntryPoint, sponsorUserOp, estimateUserOpGas } from '@aastar/ethpaymaster_sdk_ts';
+
+const publicClient = createPublicClient({
+    transport: http("https://rpc.ankr.com/eth_sepolia"),
+    chain: sepolia,
+})
+
+const bundlerClient = createClient({
+    transport: http(`https://api.pimlico.io/v2/sepolia/rpc?apikey=085e6ede-800d-4de8-af64-b1ea89b34eee`),
+    chain: sepolia,
+})
+    .extend(bundlerActions("0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789"))
+    .extend(pimlicoBundlerActions("0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789"))
+
+init(false);
+
+// check service health
+const healthRes = await health();
+console.log(healthRes);
+
+// authenticate with api key
+const authRes = await auth('apiKey');
+console.log(authRes);
+
+// get entry points
+const entryPoints = await getSupportEntryPoint('ethereum-sepolia');
+console.log(entryPoints);
+
+// get a privatekey 
+const privateKey = '0xf9cf13d03cbab6f62cc8add9ce4a145ff77caec0b4cf84813930489d20a67af7' || generatePrivateKey();
+console.log(privateKey);
+
+// get signer 
+const signer = privateKeyToAccount(privateKey);
+console.log(signer.address, 'signer address');
+
+const SIMPLE_ACCOUNT_FACTORY_ADDRESS = "0x9406Cc6185a346906296840746125a0E44976454";
+const factoryData = encodeFunctionData({
+    abi: [
+        {
+            inputs: [
+                { name: 'owner', type: 'address' },
+                { name: 'salt', type: 'uint256' },
+            ],
+            name: 'createAccount',
+            outputs: [{ name: 'ret', type: 'address' }],
+            stateMutability: 'nonpayable',
+            type: 'function',
+        }
+    ],
+    args: [signer.address, 0n],
+});
+const initCode = concat([SIMPLE_ACCOUNT_FACTORY_ADDRESS, factoryData])
+
+const senderAddress = await getSenderAddress(publicClient, {
+    factory: SIMPLE_ACCOUNT_FACTORY_ADDRESS,
+    factoryData,
+    entryPoint: entryPoints[0],
+});
+console.log("Counterfactual sender address:", senderAddress);
+
+const to = "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045" // vitalik
+const value = 0n
+const data = "0x68656c6c6f" // "hello" encoded to utf-8 bytes
+
+const callData = encodeFunctionData({
+    abi: [
+        {
+            inputs: [
+                { name: "dest", type: "address" },
+                { name: "value", type: "uint256" },
+                { name: "func", type: "bytes" },
+            ],
+            name: "execute",
+            outputs: [],
+            stateMutability: "nonpayable",
+            type: "function",
+        },
+    ],
+    args: [to, value, data],
+})
+
+const sponsorRes = await sponsorUserOp({ callData, initCode, sender: senderAddress, nonce: '0x00', strategyCode: 'Ethereum_Sepolia_v06_verifyPaymaster' });
+console.log(callData, 'callData', initCode, 'initCode', senderAddress, 'senderAddress');
+
+console.log(sponsorRes);
+const { data: {
+    userOpResponse: {
+        paymasterAndData,
+        preVerificationGas,
+        verificationGasLimit,
+        callGasLimit,
+        maxFeePerGas,
+        maxPriorityFeePerGas,
+    }
+} } = sponsorRes;
+
+
+const estimateUserOpGasRes = await estimateUserOpGas({
+    callData, initCode, sender: senderAddress, nonce: '0x00', strategyCode: 'Ethereum_Sepolia_v06_verifyPaymaster',
+});
+
+console.log(estimateUserOpGasRes, 'estimateUserOpGasRes');
+
+const gasPrice1 = await bundlerClient.getUserOperationGasPrice()
+console.log(gasPrice1, 'gasPrice');
+// return;
+
+const userOP: UserOperation<'v0.6'> = {
+    sender: senderAddress,
+    nonce: 0n,
+    initCode,
+    // factory: SIMPLE_ACCOUNT_FACTORY_ADDRESS as Address,
+    // factoryData,
+    callData,
+    callGasLimit: BigInt(callGasLimit),
+    verificationGasLimit: BigInt(verificationGasLimit),
+    preVerificationGas: BigInt(preVerificationGas),
+    maxPriorityFeePerGas: BigInt(maxPriorityFeePerGas),
+    maxFeePerGas: BigInt(maxFeePerGas),
+    paymasterAndData,
+    signature: '0xa15569dd8f8324dbeabf8073fdec36d4b754f53ce5901e283c6de79af177dc94557fa3c9922cd7af2a96ca94402d35c39f266925ee6407aeb32b31d76978d4ba1c',
+}
+
+const signature = await signUserOperationHashWithECDSA({
+    account: signer,
+    userOperation: userOP as UserOperation<"v0.6">,
+    chainId: sepolia.id,
+    entryPoint: entryPoints[0],
+})
+userOP.signature = signature;
+
+const gasPrice = await bundlerClient.getUserOperationGasPrice()
+console.log(gasPrice, 'gasPrice');
+
+userOP.maxFeePerGas = gasPrice.fast.maxFeePerGas;
+userOP.maxPriorityFeePerGas = gasPrice.fast.maxPriorityFeePerGas;
+
+
+
+const userOperationHash = await bundlerClient.sendUserOperation({
+    userOperation: { ...userOP, initCode: initCode },
+})
+
+console.log("Received User Operation hash:", userOperationHash);
+
+// let's also wait for the userOperation to be included, by continually querying for the receipts
+console.log("Querying for receipts...")
+const receipt = await bundlerClient.waitForUserOperationReceipt({
+    hash: userOperationHash,
+})
+const txHash = receipt.receipt.transactionHash
+
+console.log(`UserOperation included: https://sepolia.etherscan.io/tx/${txHash}`)
+
+
+

example/sendUserOp/package.json

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+{
+  "name": "aa_demo",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "type": "module",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@aastar/ethpaymaster_sdk_ts": "1.0.16",
+    "permissionless": "0.1.19",
+    "viem": "^2.10.5"
+  },
+  "devDependencies": {
+    "tslib": "^2.6.2",
+    "tsx": "^4.10.1",
+    "typescript": "^5.4.5"
+  }
+}