check if contract is already verified

Author: VGabriel45

src/routes/contract/deploy/erc20.ts

@@ -6,7 +6,7 @@ import { erc20bytecode } from "../../../constants/bytecodes/erc20";
 import { TransactionService } from "../../../services/transaction.service";
 import { getBlockExplorerUrl, getContractAddressFromEvent } from "../../../utils/other";
 import { logRequest, logStep, logError } from '../../../utils/loggingUtils';
-import { verifyContract } from "../../../utils/contractVerification";
+import { isContractVerified, verifyContract } from "../../../utils/contractVerification";
 import { erc20JsonInputMetadata } from "../../../constants/contractJsonInputs/erc20";
 
 type ERC20DeployRequestBody = {
@@ -150,7 +150,7 @@ export async function erc20Deploy(fastify: FastifyInstance) {
 
             logStep(request, 'Deploy transaction success', { txHash: receipt?.hash });
 
-            if (process.env.VERIFY_CONTRACT_ON_DEPLOY === 'true') {
+            if (process.env.VERIFY_CONTRACT_ON_DEPLOY === 'true' && !isContractVerified(deployedContractAddress, chainId)) {
                 logStep(request, 'Verifying contract', {
                     chainId,
                     contractAddress: deployedContractAddress,

src/utils/contractVerification.ts

@@ -42,6 +42,22 @@ export const verifyContract = async (params: VerifyContractParams) => {
     return response;
 }
 
+export const getContractSourceCode = async (contractAddress: string, chainId: string) => {
+    const url = `${ETHERSCAN_V2_API}?chainid=${chainId}&module=contract&action=getsourcecode&address=${contractAddress}&apikey=${process.env.ETHERSCAN_API_KEY}`;
+    console.log('URL', url);
+    const response = await fetch(url, {
+        method: 'GET',
+    })
+        .then(res => res.json())
+        .catch(console.error);
+    return response.result[0].SourceCode;
+}
+
+export const isContractVerified = async (contractAddress: string, chainId: string) => {
+    const sourceCode = await getContractSourceCode(contractAddress, chainId);
+    return sourceCode !== null && sourceCode !== undefined;
+}
+
 /**
  * Extracts the first source file from the sources object and returns it in the format "contract/{name.sol}:{name}".
  * @param sources The sources object from the contract JSON input.