Overview

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This project involves the creation and deployment of an ERC721A-compliant NFT (Non-Fungible Token) contract named MetaTokenNFT on Goerli Ethereum testnet then approve and deposit the NFT to Polygon Mumbai using their fxPortal bridge. The NFTs represent a collection of futuristic electric car with glowing accents, flying through a neon-lit city, each featuring a distinct artistic style and angle.

Getting Started

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Prerequisites

• Install nvm.
• Use Node.js version 16 or higher.

nvm install 16
nvm use 16

Project Initialization

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git clone <this-repo-url>

cd <the-repo>

npm install

Configuration

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Deploy contract

First compile the contract using npx hardhat compile then deploy the contract onto Goerli Ethereum testnet using the following command:

npx hardhat run --network sepolia scripts/nft/deploy.js

Then, if everything is set up right, you get a console response like this:

MetaToken NFT deployed to: <CONTRACT-ADDRESS>

Batch mint NFTs

To batch mint NFTs to the deployed contract, update the contract address in the .env.example. file and rename the file to .env. Also, subsequently update the required variables in the .env file.

Then run the batchMint.js script with this hardhat command:

npx hardhat run --network goerli scripts/nft/batchMint.js

The response log will look like:

Successfully minted: <number> MetaToken NFTs to <WALLET-ADDRESS>

Approve transfer and deposit the NFTs to Polygon bridge

Pass in the Polygon Mumbai bridged address of your contract to BRIDGE-ADDRESS in .env, then run the approveTransfer.js script with hardhat:

npx hardhat run --network sepolia scripts/nft/approveTransfer.js

The response should look like this:

NFT approval confirmed
NFT deposited on Polygon Mumbai

Author

Michael Alfred