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How to Verify Smart Contract
Verify ERC-20 Smart Contract

Detailed Guide to Verify the "LaughCoin" ERC-20 Smart Contract on flascan

This guide will walk you through the process of verifying the "LaughCoin" ERC-20 smart contract on flascan, using the example contract that was previously deployed. Verifying your contract ensures transparency and allows others to view the source code and interact with the contract.

Prerequisites

  1. Remix IDE: Your contract should be deployed via Remix IDE.

  2. Source Code: Your smart contract source code and its dependencies. (e.g., LaughCoin, LOL, 0xFd764C240Afcb7643B9a8c6CD42682425DEAd89F)

  3. Flascan: https://testnet.flascan.net (opens in a new tab).

If you have not already deployed the contract, please refer to the instructions provided Create an ERC-20 token.

Step 1: Get Contract Details

Enter LaughCoin contract address 0xFd764C240Afcb7643B9a8c6CD42682425DEAd89F.

Click "At Address" to interact with the already deployed contract.

verify20

Step 2: Flatten the Contracts

Go to Remix (opens in a new tab).

  1. Right-click on the erc20.sol file in the Remix file explorer.
  2. Select "Flatten" from the context menu. verify20
  3. Remix will generate a flattened version of the contract erc20_flattened.sol and open it in a new file. verify20

Step 3: Start Verification on flascan

  1. Go to contract LaughCoin (opens in a new tab).

  2. On the contract page, click on the “Verify & Publish” button. verify20

  3. Enter Verification Details:

  • Contract license

    Select "No License"

  • Verification method

    Solidity (Flattened source code)

  • Compiler

    v0.8.26+commit.8a97fa7a

  • EVM Version

    paris

  • Optimization enabled

    200

  • Contract code

    Copy and paste sunflower_flattened.sol.

  • Verify & Publish

    Submit your contract for verification.

The page should be like:

verify20

Step 4: Verification Status

  • Wait for Verification:

    Wait for Blockscout to process the verification.

    If successful, your contract source code and ABI will be publicly available on flascan.

verify20

  • Troubleshooting:

    If verification fails, check for common issues such as mismatched compiler versions, incorrect optimization settings, or incorrectly entered constructor arguments.

Well done! Congrats on successfully verifying your contract! 🎉

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