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Design Pattern Decissions

Access Control Design Patterns (Ownable)

This contract extends from @openzeppelin/contracts/access/Ownable.sol. The onlyOwner modifier is used by SignMeUp.setPrice(uint) function to make sure that changing the price is only permitted to contract owner.

Inheritance and Interfaces

SignMeUp is Ownable and ERC721

This contract extends from @openzeppelin/contracts/access/Ownable.sol and @openzeppelin/contracts/token/ERC721/ERC721.sol. ERC721 is used to mint a token for a user that has been selected for organized event.