API Endpoints
Contract Verification
Contract Verification
Verify with Hardhat
Make sure you’ve updated to@nomicfoundation/hardhat-verify@^2.0.14, see migrating notes if you have an existing project.
Install
Via npm.npm i @nomicfoundation/hardhat-verifyConfig
Inhardhat.config.ts, import the plugin.import "@nomicfoundation/hardhat-verify";config:HardhatUserConfig = { solidity: "0.8.28", networks: { sepolia: { url: `https://1rpc.io/sepolia`, accounts: [SEPOLIA_PRIVATE_KEY], }, }, etherscan: { apiKey: "YourEtherscanApiKey" }};Deploy and Verify
npx hardhat ignition deploy ./ignition/modules/Lock.ts --network sepolia --verifyVerify an Existing Contract
npx hardhat verify --network sepolia 0xdCBdBAA8404554502B433106e62728B659aCfE3bCustom Chains
For super new Etherscan based explorers that are not supported by Hardhat yet, you can add them as acustomChain inhardhat.config.ts.etherscan: { apiKey:"YourEtherscanApiKey", customChains: [ { network:"sonic", chainId:146, urls: { apiURL:"https://api.etherscan.io/v2/api", browserURL:"https://sonicscan.org" } }, { network:"katana", chainId:146, urls: { apiURL:"https://api.etherscan.io/v2/api", browserURL:"https://sonicscan.org" } } ]}Migrating from V1
API keys from any other explorer (such as BscScan/Basescan/Arbiscan) have been deprecated.
hardhat.config.ts file — good riddance to the longcustomChains entries for each explorer.Update your config to a single EtherscanapiKey entry as per above.This open source integration was shipped by@antico5and the Hardhat team.
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