Ethereum: it is impossible to verify contracts in Polygon’s Amoy test network

Ethereum: Unable to verify contracts on Polygon AMOY Testnet

As a developer, you may have deployed contracts on various Ethereum testnets, including the Polygon AMOY testnet. However, when you try to test your smart contracts, you encounter an error that prevents you from successfully validating their functionality. In this article, we will delve into this issue and provide steps to resolve it.

Error Details

The error message usually indicates that the Ethereum Virtual Machine (EVM) is unable to validate the contract code for some reason. The exact error message may vary depending on the specific testnet and contract deployment.

Workarounds

Here are some possible solutions that will help you resolve the issue.

1. Check the contract build options

Make sure that the contract build options are correct, especially if you are using the “–bin” flag. Setting the “–bin” option to a value other than “path/to/contract bytecode” may cause problems with contract verification.

./amoy testnet -- bin path/to/your_contract_bytecode -- from your_account_address

2. Update the EVM compiler

Make sure you are using the latest version of the EVM compiler, as updates can sometimes fix known issues.

npm install --save-dev ethereum-jest @ethersjs/react@4

or yarn add --dev ethereum-jest @ethersjs/react@4

3. Check for Ethers.js version incompatibilities

If you are using a specific version of the Ethers.js library, make sure it is compatible with your contract deployment.

const Web3 = require("@ethersproject/web3");

For compatibility notes and updates, see the [Ethers.js documentation](

4. Run Testnet in Debug Mode

Try running testnet in debug mode to see if this resolves the issue:

const Web3 = require("@ethersproject/web3");
const ethers = new Web3 ("
// Deploy the contract to the AMOY testnet
const deployContract = async () => {
try {
// Deploy the contract code
const contractAddress = await ethers.deployed("YourContractName");
// Verify the contract on the AMOY testnet using debug mode
await contractAddress.verify("YourVerificationCode");
} catch (error) {
console.error(error);
}
};

5. Check your contract code for syntax errors

Make sure your contract code is free of syntax errors, as these can prevent the EVM from validating contracts.

6. Contact Support or Reach Out to the Community

If none of the above steps resolve the issue, consider reaching out to the Ethereum and AMOY communities for assistance or seeking help from a qualified developer.

By following these troubleshooting steps, you should be able to identify and resolve the issue that is preventing your contract from verifying on the AMOY testnet.