The TDC Certificates Smart Contract is an ERC721A NFT contract written in Solidity. It differs from a typical NFT smart contract in that only authorized users with the Minter role can mint NFTs. There also is not withdraw() function because the contract does not receive any ETH payments.
To build the contract, you'll need to install Hardhat and some required NPM packages:
npm init -Y
npm i -D hardhat
npx hardhat
npm i -D @nomiclabs/hardhat-waffle ethereum-waffle chai @nomiclabs/hardhat-ethers ethers
npm install dotenv
You'll also need an Alchemy account to access Ethereum network data.
Once installed, create a .env file that will contain your environment variables.
touch .env
code .env
Finally, you'll need to install the dependant smart contract libraries:
npm install --save-dev @nomiclabs/hardhat-etherscan
npm install --save-dev erc721a
npm install @openzeppelin/contracts
npm install @opengsn/contracts
Now that the install and setup is complete, you can make sure everything is installed correctly by running the tests:
npx hardhat test
To deploy the smart contract, run the following command:
npx hardhat run scripts/deploy.js --network rinkeby
Finally, you can verify the contract with the following command (substitute the address for your newly created contract):
npx hardhat verify --network rinkeby {address}