HelloERC721

HelloERC721 is an ERC721 token implementation showcasing cross-chain NFT functionality without the need for traditional bridges. Utilizing advanced smart contract techniques, it exemplifies a novel approach to NFT minting, transferring, and bridging across different blockchain networks.

Features

• ERC721 NFT Implementation: A standard ERC721 NFT
• Cross-Chain Functionality: Native support for cross-chain interactions without using a bridge.
• CryptoLink.Tech Integration: Leverages the CryptoLink.Tech NPM package for seamless cross-chain communication.
• Configurable on Multiple Networks: Can be deployed and configured across various blockchain networks.

Prerequisites

Before you begin, ensure you have the following installed:

• Node.js and npm (Node Package Manager)
• A text editor such as VSCode for editing .sol and .ts files
• GIT installed

Please visit node documentation link and the git install documentation for more information.

Installation

Please open a terminal to run the following commands. You can use any terminal of your choice, including the built in terminal in vscode (Terminal -> New Terminal)

1. Clone the Repository:

   git clone https://github.com/CryptoLinkTech/hello-erc721.git
   

   After cloning the repository, if using vscode or a similar IDE, you can now open the hello-erc721 in your IDE of choice.

2. Install Dependencies:

   npm install
   

3. Set Up Environment Variables: Create a new .env file to set your EVM private key for contract deployment or copy and edit the existing .env.example to .env

   PRIVATE_KEY=0000000000000000000000000000
   

Deployment

Deploy the HelloERC721 contract to your desired networks. This must be done for each network you wish to operate on.

npx hardhat --network [network-name] deploy

Configuration

Edit the networks-testnet.json file and include all of the networks the contract is deployed on.

[
    "fantom-testnet",
    "polygon-testnet",
    "sonic-testnet"
]

Once all contracts are deployed across the desired networks and listed in networks-testnet.json, configure them using the provided script. Remember, if a new network is added later, all contracts must be reconfigured.

npx hardhat --network [network-name] configure

Usage

Minting an NFT

To mint an NFT on a chain:

npx hardhat --network [network-name] mint-nft

You will get the next available NFT. NFTs start at [chain-id]0000 so the first NFT minted on Polygon Testnet will be 800010000 and the next 800010001 etc..

Viewing NFT Details

To view the details of an NFT including its Metadata and Owner:

npx hardhat --network [network-name] get-nft --nftid [nft-id]

Bridging NFTs to Another Chain

To send NFTs to another chain:

npx hardhat --network [network-name] bridge-nft --dest [destination-chain-id] --nftid [nft-id]