Dbilia Token - A Simple Custom Non Fungible Token

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

Make sure you create a test script and test all this process thoroughly.

Configuration

Install Truffle cli

Skip if you have already installed.

npm install -g truffle

Install Dependencies

yarn install

Test!💥

Run Tests

Launch Ganache then run:

yarn test

or test in truffle console

truffle(develop)> test
Using network 'develop'.


Compiling your contracts...
===========================
> Everything is up to date, there is nothing to compile.



  Contract: DbiliaToken
    mintWithUSD
      √ should be called by only owner (1142ms)
      √ should not mint for invalid user (188ms)
      √ should mint (293ms)
      √ should not be able to mint with same card (815ms)
    mintWithETH
      √ should require sufficient ETH (196ms)
      √ should mint (356ms)
      √ should not be able to mint with same card (1132ms)


  7 passing (6s)

maAPPsDEV / dbilia-token