adrian10016 / dbilia-token

dbilia-test Simple Custom NFT

Assignment

In this project you will be using either truffle or hardhat to build a small minting smart contract. We recommend you to use the solidity version ^0.8.0;

Dbilia app accepts payment both in USD and ETH for minting; and smart contract needs to track this information.

• When a user wants to pay in USD, user pays gas fee to Dbilia in advance; and Dbilia’s ethereum account will mint the token on the user’s behalf and will keep the token.
• When a user wants to pay in ETH, user himself (msg.sender) will mint and keep the token.

Create two minting functions in DbiliaToken.sol and make sure to emit an event.

• mintWithUSD() i. when we confirm the user has paid gas fee to Dbilia, we will trigger this function ii. Only Dbilia can trigger using a modifier iii. take four parameters (userId, cardId, edition, tokenURI) iv. add any require statements as much as possible v. create a mapping to track the owner of token using userId (because dbilia is minting on their behalf) vi. cardId and edition should be mapped to a mapping vii. mint viii. set token uri

• mintWithETH() i. take three parameters (cardId, edition, tokenURI) ii. add any require statements as much as possible iii. cardId and edition should be mapped to a mapping iv. mint v. set token uri

Development

Local environment

Add INFURA_PROJECT_ID, PRIVATE_KEY and ETHERSCAN_API_KEY at hardhat.config.js

yarn install

Testing

npx hardhat test