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