Ethereum: Unable to verify contracts on Polygon AMOY testnet
As a developer, you have probably deployed contracts to various Ethereum testnets, including Polygon’s AMOY testnet. However, when you try to verify your smart contracts, you encounter an error that prevents you from successfully verifying their functionality. In this article, we will examine the issue and provide steps to resolve it.
Error Details
The error message usually indicates that the Ethereum Virtual Machine (EVM) cannot validate the contract code for some reason. The exact error message may vary depending on the specific testnet and contract implementation.
Solutions
Here are some possible solutions to help you resolve the issue:
1. Check contract writing options
Make sure your contract compilation options are correct, especially when using the --bin flag. If the --bin option is set to a value other than path/to/contract bytecode, it can cause issues 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 incompatibility
If you are using a specific version of the Ethers.js library, make sure it is compatible with your contract implementation.
const Web3 = require("@ethersproject/web3");
See the [Ethers.js documentation]( for compatibility notes and updates.
4. Run Testnet in debug mode
Try running the testnet in debug mode to see if that fixes the issue:
const Web3 = require("@ethersproject/web3");
const ethers = new Web3("
// Deploy a contract to the AMOY testnet
const deployContract = async() => {
try {
// Implement the contract code
const contractAddress = await ethers.deployed("YourContractName");
// Test the contract on the AMOY testnet using debug mode
await contractAddress.verify("YourVerificationCode");
} catch (error) {
console.error(error);
}
};
5. Check 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 connect with the community
If none of the above steps resolve the issue, consider reaching out to the Ethereum and AMOY communities for support 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 being validated on Polygon’s AMOY testnet.
