Please read this blog to lean about the fundamentals of Hardhat.
Hardhat has an Etherscan plugin: Hardhat Etherscan plugin
Note: Hardhat was previously Buidler.
Install the plugin
npm install --save-dev @nomiclabs/hardhat-etherscan
Go to BSCScan and register an API key: https://bscscan.com/myapikey
Configure the plugin in buidler.config.js
- Add require(“@nomiclabs/hardhat-etherscan”);
- Add Bscscan API key
Warning
keep secret and don’t commit to version control
- Set compiler version to match what was deployed
// hardhat.config.js
const { mnemonic, bscscanApiKey } = require('./secrets.json');
require('@nomiclabs/hardhat-ethers');
require("@nomiclabs/hardhat-etherscan");
/**
* @type import('hardhat/config').HardhatUserConfig
*/
module.exports = {
networks: {
testnet: {
url: `https://data-seed-prebsc-1-s1.binance.org:8545`,
accounts: {mnemonic: mnemonic}
},
mainnet: {
url: `https://bsc-dataseed.binance.org/`,
accounts: {mnemonic: mnemonic}
}
},
etherscan: {
// Your API key for Etherscan
// Obtain one at https://bscscan.com/
apiKey: bscscanApiKey
},
solidity: "0.5.12"
};
Verify
Warning
Remove any unnecessary contracts and clear the artifacts otherwise these will also be part of the verified contract.
Run the following command:
npx buidler verify --network mainnet DEPLOYED_CONTRACT_ADDRESS "Constructor argument 1"
- Example on testnet
$ npx hardhat verify --network testnet 0xbF39886B4F91F5170934191b0d96Dd277147FBB2 Nothing to compile Compiling 1 file with 0.5.16 Successfully submitted source code for contract contracts/BEP20Token.sol:BEP20Token at 0xbF39886B4F91F5170934191b0d96Dd277147FBB2 for verification on Etherscan. Waiting for verification result... Successfully verified contract BEP20Token on Etherscan. https://testnet.bscscan.com/address/0xbF39886B4F91F5170934191b0d96Dd277147FBB2#code
