Detailed Guide to Verify the "SunFlower" NFT Smart Contract on flascan

This guide will walk you through the process of verifying the "SunFlower" NFT smart contract on Blockscout, 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., SunFlower NFT Collection 0x9FC12F47Bf48ECF3C16b90551be372a7F31764cB)
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 Deploying an ERC-721 NFT Collection.

Step 1: Obtain Contract Details

SunFlower NFT Example:

Contract: 0x9FC12F47Bf48ECF3C16b90551be372a7F31764cB

Step 2: Flatten the Contracts

Go to Remix (opens in a new tab).

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

Step 3: Start Verification on flascan

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

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

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:

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.

• 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! 🎉