dsa-connectors/contracts/common/math.sol
2020-11-21 01:49:48 +11:00

42 lines
1.1 KiB
Solidity

pragma solidity ^0.6.0;
import { SafeMath } from "@openzeppelin/contracts/math/SafeMath.sol";
contract DSMath {
uint constant WAD = 10 ** 18;
uint constant RAY = 10 ** 27;
function add(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(x, y);
}
function sub(uint x, uint y) internal virtual pure returns (uint z) {
z = SafeMath.sub(x, y);
}
function mul(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.mul(x, y);
}
function div(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.div(x, y);
}
function wmul(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, y), WAD / 2) / WAD;
}
function wdiv(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, WAD), y / 2) / y;
}
function rdiv(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, RAY), y / 2) / y;
}
function rmul(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, y), RAY / 2) / RAY;
}
}