NFT minting Project (Solidity)

This project is my solution from the exercise in @buildspace.so about NFT minting to the Opensea with solidity hardhat which ramdom generate 3 words and random backgound colour.User can mint NFT not over 50 NFTs.

NFT is JSON format like

{
    "name": "Thanasornsawan",
    "description": "An NFT from thanasornsawan",
    "image": "data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHByZXNlcnZlQXNwZWN0UmF0aW89InhNaW5ZTWluIG1lZXQiIHZpZXdCb3g9IjAgMCAzNTAgMzUwIj4KICAgIDxzdHlsZT4uYmFzZSB7IGZpbGw6IHdoaXRlOyBmb250LWZhbWlseTogc2VyaWY7IGZvbnQtc2l6ZTogMTRweDsgfTwvc3R5bGU+CiAgICA8cmVjdCB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiBmaWxsPSJibGFjayIgLz4KICAgIDx0ZXh0IHg9IjUwJSIgeT0iNTAlIiBjbGFzcz0iYmFzZSIgZG9taW5hbnQtYmFzZWxpbmU9Im1pZGRsZSIgdGV4dC1hbmNob3I9Im1pZGRsZSI+VGhhbmFzb3Juc2F3YW48L3RleHQ+Cjwvc3ZnPg=="
}

So, when you want the NFT to show on Opensea, you have to host this JSON file somewhere but it may not a good idea to rely on 3rd party.The best way is encode all JSON file into base64 format.That's why this project use base64 library.

Before running this project, you need to install dotenv and hardhat-etherscan plugin.

npm install dotenv
npm install --save-dev @nomiclabs/hardhat-etherscan

In order to use some plugins, API keys or custom network with secret config we need a .env file. You can check hardhat.config.js for more details. This project use API key from Alchemy to be as node provider for deploy smart contract to rinkeby test network, API key from etherscan for verify your smart contract and private key of your metamask wallet on rinkeby test network and setup all credentials in your own .env file.

require("@nomiclabs/hardhat-waffle");
require("dotenv").config();
require("@nomiclabs/hardhat-etherscan");

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
module.exports = {
  solidity: "0.8.4",
  networks: {
    rinkeby: {
      url: process.env.DEVELOP_ALCHEMY_KEY,
      accounts: [process.env.PRIVATE_KEY]
    },
  },
  etherscan: {
    // Your API key for Etherscan
    // Obtain one at https://etherscan.io/
    apiKey: process.env.ETHERSCAN_KEY
  }
};

Try running some of the following tasks:

For test function from smart contract with ether.js

npx hardhat run scripts/run.js

For upload file to the rinkeby test network

npx hardhat run scripts/deploy.js --network rinkeby

After deployed contract finished, you can visit opensea test network and find the collection of your smart contract address.

If have any problem during run hardhat command,try this one.

npx hardhat clean

For auto verify your smart contract on etherscan from command

npx hardhat verify <smart contract address> --network rinkeby

Thanasornsawan/NFT-mint

NFT minting Project (Solidity)