This project is about to make NFTs with On-Chain Metadata with hardhat && Javascript.

• Lower Gas Fees(10,000x lower gas costs per transaction than Ethereum)

• Faster Transactions (65,000 tx/seconds vs ~14)

• mumbaifaucet.com
• faucet.polygon.technology

run npx init command and then add OpenZeppelin smart contract library to our project add dotenv library to our project too. It's useful when we need to add a .env config file which we don't need to commit to our git repo.

npm init
npx hardhat init
npm i --save @openzeppelin/contracts
npm i --save dotenv

• generateCharacter: to generate and update the SVG image of our NFT
• getLevels : return the level of the NFT.
• getTokenURI : get the TokenURL of an NFT
• mint: of course we need to mint
• train: train an NFT and raise its level.