How to Use Etherscan/BscScan Verification Tools for Code Verification and Comparison

Step-by-Step Guide:

1. Navigate to the Verification Interface

  • Go to your contract’s page on Etherscan or BscScan.

  • Select the "Contract" tab and click "Verify and Publish."

2. Enter Contract Information

  • Input your smart contract’s deployed address.

  • Choose the correct compiler type (e.g., Solidity single file, multi-part, or standard JSON input).

  • Select the exact compiler version used during deployment.

  • Specify any optimization settings used.

3. Provide Source Code

  • For simple single-file contracts, paste the Solidity code directly.

  • For complex or multi-file contracts, either flatten your files into a single document using tools like Remix or provide the "Standard-JSON Input" format.

4. Include Constructor Arguments

  • If your contract was deployed with constructor parameters, provide them encoded in ABI-encoded hexadecimal format.

  • Tools like Remix or Hardhat can help generate the encoded arguments easily.

5. Submit Verification Request

  • Complete any required captcha verification.

  • Click "Verify and Publish."

  • Upon successful verification, you’ll receive confirmation, and your contract's page will now display the verified source code.

Best Practices:

  • Always document compiler settings and optimization options clearly.

  • Flatten your contracts consistently using reliable tools for verification.

  • Regularly verify deployed contracts immediately after deployment to maintain trust.

  • Integrate programmatic verification into CI/CD pipelines using Etherscan/BscScan APIs.

Using Etherscan and BscScan's verification tools ensures clarity, promotes community confidence, and provides easy access for developers to inspect and compare smart contract code.

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