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How to Verify Contracts ​

Contract verification allows others to view and interact with your contract source code on block explorers. This guide shows you how to verify contracts deployed with hardhat-deploy.

Prerequisites ​

Install the verification extension:

bash
npm install -D @rocketh/verifier
bash
pnpm add -D @rocketh/verifier

Supported Services ​

hardhat-deploy supports verification on:

  • Etherscan (and compatible explorers like Polygonscan, BSCScan)
  • Sourcify (decentralized verification)
  • Blockscout (open-source explorer)

Basic Verification ​

Etherscan Verification ​

Set up your API key in environment variables:

bash
# .env
ETHERSCAN_API_KEY=your_etherscan_api_key_here

Verify all deployed contracts:

bash
pnpm rocketh-verify -e sepolia etherscan

Sourcify Verification ​

Sourcify doesn't require an API key:

bash
pnpm rocketh-verify -e sepolia sourcify

Blockscout Verification ​

For custom Blockscout instances:

bash
pnpm rocketh-verify -e sepolia blockscout --endpoint https://eth-sepolia.blockscout.com/api/v2

Next Steps ​