Add contract verification CLI with ENS/Basename support

[Copilot]

Implements npm run verify command for verifying smart contracts on Etherscan/Basescan APIs. Supports Ethereum mainnet, Sepolia, Base mainnet, and Base Sepolia networks.

Changes

• Verification script (apps/web/scripts/verify-contract.js)

  • Submits contract source code to Etherscan/Basescan verification API
  • Polls verification status with configurable timeout
  • Recognizes ENS names (e.g., kushmanmb.eth) and Basenames (e.g., yaketh.base.eth)
  • Provides guided manual resolution for ENS/Basenames (automatic resolution requires keccak256)
  • Zero external dependencies (Node.js built-ins only)

• NPM script (package.json)

  • Added verify command to root package

• Documentation (CONTRACT_VERIFICATION.md)

  • Usage examples with hex addresses and ENS names
  • Network configuration and API key setup
  • Troubleshooting guide

Usage

# Hex address
npm run verify -- \
  --address 0x1234567890abcdef1234567890abcdef12345678 \
  --source ./contracts/MyContract.sol \
  --name MyContract \
  --compiler v0.8.20+commit.a1b79de6 \
  --network sepolia \
  --optimization 1 \
  --runs 200

# ENS name (provides resolution instructions)
npm run verify -- \
  --address kushmanmb.eth \
  --source ./contracts/MyContract.sol \
  --name MyContract \
  --compiler v0.8.20+commit.a1b79de6 \
  --network mainnet

Requires ETHERSCAN_API_KEY environment variable.

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[Yaketh (Kushmanmb)]

kushmanmb.eth

[github-advanced-security]

Bearer found more than 20 potential problems in the proposed changes. Check the Files changed tab for more details.