laurenamy / currency Goto Github PK

Token Test:
it should revert if owner has not given approval
it should revert if transferFrom function is not called by Contribution contract

• add function that creates(mints) an NFT token
• each NFT token represents an animal (a struct with a name, type of animal, age)
• a function the returns the animal for a user
• any user should be allowed to mint an NFT token
• only owner should be able to pause and unpause contract

Inherit the openzeppelin ownable contract and use onlyOwner modifier so only owner can setStartDate and setEndDate

@laurenamy Take a look through this: https://github.com/gnosis/mock-contract

This application may be too simple to use this right now, but I want you to familiarize yourself with this because I want to start using it with projects. It's really useful when you have to do a lot of setup in other contracts before testing a specific function. It enables true unit testing.

To see how this makes things easier, you can take a look at this PR that I submitted for LottoDAO to refactor one of the testing files for a smart contract:
https://github.com/upstateinteractive/lottoDAO/pull/169/files

Develop a token contract that inherits from OpenZeppelin's ERC20 contract and extends its functionality so that tokens can only be transferred after a particular _startTime and before a particular _endTime that are provided in the constructor.

Add commenting using similar format to LottoDAO:
https://github.com/upstateinteractive/lottoDAO/blob/next/contracts/LottoDAO.sol

• users must be token holders
• add a function for users to start a project with a title, amount of tokens to raise, and duration in days
• get a project by projectId
• get all projects
• allow user to submit tokens for a specific project
• keep track of users who submitted tokens for each project
• check tokens raised for each project
• do not allow users to submit tokens if duration has passed
• function to allow user to get refund if duration has passed and full amount of tokens was not raised

Implement a Contribution contract that users can donate ETH to. In return for their ETH-based contributions, your Contribution contract should issue them tokens from your token contract in return.