Fix/arb token

backend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "arka",
-  "version": "1.7.3",
+  "version": "1.7.4",
   "description": "ARKA - (Albanian for Cashier's case) is the first open source Paymaster as a service software",
   "type": "module",
   "directories": {

backend/src/constants/MultitokenPaymaster.ts

@@ -1,3 +1,17 @@
 import { BigNumber } from "ethers";
 
-export const UnaccountedCost = BigNumber.from("45000").toHexString();
+export const UnaccountedCost = BigNumber.from("45000").toHexString();
+
+interface TokenInfo {
+    decimals: number;
+    symbol: string;
+}
+
+export const TokenDecimalsAndSymbol: Record<number, Record<string, TokenInfo>> = {
+    42161: {
+        "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE": {
+            decimals: 18,
+            symbol: "ETH"
+        }
+    }
+}

backend/src/paymaster/index.ts

@@ -14,7 +14,7 @@ import ChainlinkOracleAbi from '../abi/ChainlinkOracleAbi.js';
 import ERC20PaymasterV07Abi from '../abi/ERC20PaymasterV07Abi.js';
 import ERC20Abi from '../abi/ERC20Abi.js';
 import EtherspotChainlinkOracleAbi from '../abi/EtherspotChainlinkOracleAbi.js';
-import { UnaccountedCost } from '../constants/MultitokenPaymaster.js';
+import { TokenDecimalsAndSymbol, UnaccountedCost } from '../constants/MultitokenPaymaster.js';
 import { NativeOracleDecimals } from '../constants/ChainlinkOracles.js';
 const ttl = parseInt(process.env.CACHE_TTL || "600000");
 const nativePriceCacheTtl = parseInt(process.env.NATIVE_PRICE_CACHE_TTL || "60000");
@@ -265,6 +265,22 @@ export class Paymaster {
     return paymasterAndData;
   }
 
+  private async getTokenDecimals(token: string, chainId: number, provider: providers.JsonRpcProvider) {
+    if(TokenDecimalsAndSymbol[chainId]?.[token]) {
+      return TokenDecimalsAndSymbol[chainId][token]?.decimals;
+    }
+    const tokenContract = new ethers.Contract(token, ERC20Abi, provider);
+    return tokenContract.decimals();
+  }
+
+  private async getTokenSymbol(token: string, chainId: number, provider: providers.JsonRpcProvider) {
+    if(TokenDecimalsAndSymbol[chainId]?.[token]) {
+      return TokenDecimalsAndSymbol[chainId][token]?.symbol;
+    }
+    const tokenContract = new Contract(token, ERC20Abi, provider);
+    return tokenContract.symbol();
+  }
+
   private async getEstimateUserOperationGas(
     provider: providers.JsonRpcProvider,
     userOp: any,
@@ -352,10 +368,9 @@ export class Paymaster {
     }
 
     const oracleContract = new ethers.Contract(oracleAddress, OrochiOracleAbi, provider);
-    const tokenContract = new ethers.Contract(gasToken, ERC20Abi, provider);
     const promises = [
-      tokenContract.decimals(),
-      tokenContract.symbol(),
+      this.getTokenDecimals(gasToken, chainId, provider),
+      this.getTokenSymbol(gasToken, chainId, provider),
       oracleContract.getLatestData(1, ethers.utils.hexlify(ethers.utils.toUtf8Bytes('ETH')).padEnd(42, '0'))
     ];
 
@@ -404,11 +419,10 @@ export class Paymaster {
     }
 
     const chainlinkContract = new ethers.Contract(oracleAddress, ChainlinkOracleAbi, provider);
-    const tokenContract = new ethers.Contract(gasToken, ERC20Abi, provider);
 
     const promises = [
-      tokenContract.decimals(),
-      tokenContract.symbol(),
+      this.getTokenDecimals(gasToken, chainId, provider),
+      this.getTokenSymbol(gasToken, chainId, provider),
       chainlinkContract.decimals(),
       chainlinkContract.latestAnswer()
     ];
@@ -461,11 +475,10 @@ export class Paymaster {
       return cache.data;
     }
     const ecContract = new ethers.Contract(oracleAddress, EtherspotChainlinkOracleAbi, provider);
-    const tokenContract = new ethers.Contract(gasToken, ERC20Abi, provider);
 
     const promises = [
-      tokenContract.decimals(),
-      tokenContract.symbol(),
+      this.getTokenDecimals(gasToken, chainId, provider),
+      this.getTokenSymbol(gasToken, chainId, provider),
       ecContract.cachedPrice()
     ];
 

backend/src/server.ts

@@ -341,7 +341,7 @@ const initializeServer = async (): Promise<void> => {
       },
       {
         name: 'updateTokenOracleData',
-        cronTime: process.env.TOKEN_ORACLE_UPDATE_CRON_EXP || '*/5 * * * *', // every 5 mins.
+        cronTime: process.env.TOKEN_ORACLE_UPDATE_CRON_EXP || '*/7 * * * *', // every 7 mins.
         onTick: async () => {
           let buffer = Buffer.from(server.config.MULTI_TOKEN_PAYMASTERS, 'base64');
           const multiTokenPaymasters = JSON.parse(buffer.toString());