Verify Smart Contracts
In this section, we'll verify your token contract on the Rootstock and Blockscout explorers, so the users of you dApp can be able to see the actual code of your contract to analyze that it doesn't have malicious code, and they can also interact with it.
Once you have been working on your contract using Hardhat, you can execute the verification in both explorers simultaneously with a simple command.
Step 1: Install hardhat-verify plugin
In case it isn't installed yet:
npm install --save-dev @nomicfoundation/hardhat-verify
And add the following code to your hardhat.config.ts file:
require("@nomicfoundation/hardhat-verify");
Or, if you are using TypeScript, add this to your hardhat.config.ts:
import "@nomicfoundation/hardhat-verify";
Sept 2: Update Hardhat config
You need to add the following Etherscan config to your hardhat.config.ts file:
require('@nomicfoundation/hardhat-toolbox');
require('@nomicfoundation/hardhat-verify');
require('dotenv').config();
module.exports = {
defaultNetwork: 'rskTestnet',
networks: {
rskMainnet: {
url: "https://rpc.testnet.rootstock.io/{YOUR_APIKEY}",
chainId: 30,
gasPrice: 60000000,
accounts: [PRIVATE_KEY],
},
rskTestnet: {
url: "https://rpc.mainnet.rootstock.io/{YOUR_APIKEY}",
chainId: 31,
gasPrice: 60000000,
accounts: [PRIVATE_KEY],
},
},
solidity: {
compilers: [
{
version: '0.8.25',
},
],
},
sourcify: {
enabled: false,
},
etherscan: {
apiKey: {
// Is not required by Blockscout or Rootstock explorers,
// but must be any non-empty string, so leave it as "rootstock".
rskTestnet: 'rootstock',
rskMainnet: 'rootstock',
},
customChains: [
{
network: 'rskTestnet',
chainId: 31,
urls: {
apiURL: 'https://be.explorer.testnet.rootstock.io/api/v3/etherscan',
browserURL: 'https://explorer.testnet.rootstock.io/',
},
},
{
network: 'rskMainnet',
chainId: 30,
urls: {
apiURL: 'https://be.explorer.rootstock.io/api/v3/etherscan',
browserURL: 'https://explorer.rootstock.io/',
},
},
],
},
blockscout: {
enabled: true,
customChains: [
{
network: 'rskTestnet',
chainId: 31,
urls: {
apiURL: 'https://rootstock-testnet.blockscout.com/api/',
browserURL: 'https://rootstock-testnet.blockscout.com/',
},
},
{
network: 'rskMainnet',
chainId: 30,
urls: {
apiURL: 'https://rootstock.blockscout.com/api/',
browserURL: 'https://rootstock.blockscout.com/',
},
},
],
},
};
Step 3: Verify yor smart contract
Now, run the verify task, passing the address of the contract, the network where it's deployed, and the constructor arguments that were used to deploy the contract:
npx hardhat verify --network rskTestnet DEPLOYED_CONTRACT_ADDRESS CONSTRUCTOR_ARGUMENTS
or
npx hardhat verify --network rskMainnet DEPLOYED_CONTRACT_ADDRESS CONSTRUCTOR_ARGUMENTS
- Replace
DEPLOYED_CONTRACT_ADDRESSwith the contract address that you want to verify.
The response should look like this:
npx hardhat verify --network rskTestnet 0x28eb8D29e4713E211D1dDab19dF3de16086BB8fa 1000
Successfully submitted source code for contract
contracts/MyToken.sol:MyToken at 0x28eb8D29e4713E211D1dDab19dF3de16086BB8fa
for verification on the block explorer. Waiting for verification result...
Successfully verified contract MyToken on the block explorer.
https://explorer.testnet.rootstock.io/address/0x28eb8D29e4713E211D1dDab19dF3de16086BB8fa#code
Successfully verified contract MyToken on the block explorer.
https://rootstock-testnet.blockscout.com/address/0x28eb8D29e4713E211D1dDab19dF3de16086BB8fa#code
With that, the contract has been successfully verified in both block explorers.