Blockchain Development for Finance Projects

Creating the ERC721 Token contract

We will start by creating a .sol file in our contracts directory and will name this file Condos.sol:

1. We will begin writing our contract by first declaring the Solidity compiler version as shown here:

pragma solidity ^0.5.2;

2. Next, as shown in the following code, we will import the dependent sample contract templates from the openzeppelin library:

import "openzeppelin-solidity/contracts/token/ERC721/ERC721Metadata.sol";

ERC721Metadata.sol is an extremely useful resource for creating non-fungible tokens. It implements the hashmap TokenURI for storing token metadata. This helps as the native ERC721 standard does not implement a standard for capturing token metadata. It can be used to quickly create an ERC721 ...