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Harmony NFT Example

This example will include the process of creating a simple NFT demo on Harmony Testnet, using NFT.Storage to store off-chain NFT data on IPFS and Filecoin to achieve the total decentralization of your NFT.

What's incldued in this example:

  • HRC721/NFT smart contract
  • Connecting to Harmony blockchain via MetaMask
  • Uploading NFT assets via NFT.Storage
  • Invoking NFT smart contract to mint NFT via MetaMask

Pre-requirement

This example requires basic knowledge about harmony blockchain, HRC721/ERC721, Truffle and MetaMask. Before you start this tutorial, make sure you have installed the necessary tools.

  • Node.js
  • Truffle
  • Metamask browser extension fill with Harmony TestNet Token (ONE)
  • NFT.Storage Account for API key

Quick Start

  1. Clone Project

    git clone https://github.com/longfeiWan9/harmony-nft-demo.git
cd harmony-nft-demo

  2. Modify the smart contract contracts\HarmonyNFT.sol according to your preference.

    //Deply EPC721 with name and description specified.
constructor() ERC721 ("ETH on Harmony using NFT.Storage", "HNFT-L") {}

  3. Export you Harmony wallet private key and add it into truffle-config.js for smart contract deployment

    const privateKeyTest = '<HARMONY-WALLET-PRIVATE-KEY>';

  4. Install the dependencies.

    npm install

  5. Compile and deploy your smart contract

    truffle deploy --network harmonyTestnet

    copy the deployed smart contract address to src\components\MintNFT.js

    const nftContractAddress = '<YOUR-NFT-SMART-CONTRACT-ADDRESS>';

  6. Get an NFT.Storage API key from NFT.Storage and add it in src\components\MintNFT.js

    const APIKEY = '<YOUR-NFTSTORAGE-API-KEY>';

  7. Start the front end and try it out

    npm start