Blockchain Development for Finance Projects

Writing the contracts

We'll be using the OpenZeppelin suite of smart contract templates for writing our contracts. Let's start by writing the USD token contract:

1. We start writing the code by declaring the Solidity compiler version:

pragma solidity ^0.5.2;

2. Next, we import the requisite OpenZeppelin contract templates, which we will use to build our token:

import "openzeppelin-solidity/contracts/token/ERC20/ERC20Detailed.sol";import "openzeppelin-solidity/contracts/token/ERC20/ERC20Capped.sol"; import "openzeppelin-solidity/contracts/ownership/Ownable.sol";

The first contract template is ERC20Detailed. The ERC20Detailed contract allows you to set the parameters of the ERC20 token using a constructor such as the token name, token symbol, ...