本文合约部署步骤:https://blog.csdn.net/wonderBlock/article/details/109903310
本文环境:以太坊POA联盟链 + chrome浏览器 + metamask + remix
本文内容:本文介绍通过质押底层币(以太坊)资产获取收益的一般逻辑及其实现方法,该方案在很多 defi 项目得到应用;本文中的收益为ERC20通证,收益获取也可以理解为挖矿行为;
1.质押挖矿合约源码
1.1 SafeMath.sol
pragma solidity 0.5.8;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (u