NFT rewarder system

Smart contract

• ERC1155
  • Mapping from token ID to account balances:
    mapping(uint256 => mapping(address => uint256)) private _balances;
• whitelisting integrated into contract
  • data structure which holds mapping between NFT <-> eligible user
  • can be updated in batches, to minimize gas cost
• compatibility with Opensea
• extensive testing - hardhat tests or Foundry
• chain?

Reward eligibility

• plug-in scripts checking the subgraphs (or some other data source) for specific criteria
  • script can be a cron-job
• script's output should be account or list of accounts, stored to file/DB
• result (account eligible for reward) should be checked manually
  • do the numbers make sense?
  • is account EOA or contract?
• add NFT metadata and jpeg to IPFS and pin it (Pinata)
• send TX to smart contract, making user whitelisted to mint his NFT

UI

• create jpegs and metadata
• integrate minting functionality into UI
  • alert to make user aware of NFT eligibility
  • minting button
• display my reward NFTs
• display page for all the rewarded NFTs - leaderboard, statistics, etc.