NFT-Cert-Issue-Check

NFT-Cert-Issue-Check is a .NET 8 solution for minting and verifying NFT-based certificates on the Ethereum blockchain. It leverages Nethereum for blockchain interactions and QRCoder for certificate QR code generation.

Features

• Mint NFT Certificates:
  Mints NFTs to specified Ethereum addresses and generates certificate images with embedded QR codes linking to transaction details on Etherscan.

• Verify NFT Ownership:
  Provides functionality to check NFT ownership and validity.

• Smart Contract Integration:
  Loads contract ABIs from JSON files and interacts with deployed contracts.

Technologies

• C# 12.0 / .NET 8
• Nethereum – Ethereum blockchain integration
• QRCoder – QR code generation
• Newtonsoft.Json – JSON parsing

Project Structure

• NFTBusiness/services/
  • Mint.cs – Handles NFT minting and certificate generation.
  • ContractInfo.cs – Loads contract ABI from JSON files.
  • CheckNFT.cs – Verifies NFT ownership.
• NFTBusiness/interfaces/
  • IMint.cs, IContractInfo.cs, ICheckNFT.cs – Service interfaces.
• Controllers/
  • MintNFTController.cs, CheckNFTController.cs – API endpoints for minting and checking NFTs.
• BuiltContract/
  • Contains contract JSON files (e.g., FishToken.json, GuakGuakToken.json).

Getting Started

Prerequisites

• .NET 8 SDK
• Ethereum testnet account and private key
• Infura endpoint (or other Ethereum node provider)

Configuration

Update the following in your code or configuration:

• Infura URL (e.g., https://rinkeby.infura.io/v3/<your_project_id>)
• Contract addresses and ABI file paths
• Private key and chain ID

Building

dotnet build

Running

You can run the solution as a web API or integrate the services into your application.

Minting an NFT Certificate

1. Call the MintCert() method in Mint.cs with the required properties set.
2. The method will:
   • Mint an NFT via the smart contract.
   • Generate a certificate image with a QR code linking to the transaction on Etherscan.

Verifying an NFT

1. Use the CheckNFT service to query ownership and validity.

Example Usage

var mintService = new Mint(); mintService.owner_address = "<recipient_address>"; mintService.pkey = "<private_key>"; mintService.chainId = 4; // Rinkeby testnet mintService.contract_address = "<contract_address>"; mintService.ABI = "<contract_abi>"; mintService.authority_address = "<authority_address>"; Bitmap certImage = mintService.MintCert(); // Save or display certImage as needed

License

This project is licensed under the MIT License.

Acknowledgements

• Nethereum
• QRCoder
• Infura

Video Demo

nftcert-nosound_yY2z6363.mp4