dsa-connectors/contracts/optimism/common/math.sol
2022-03-22 20:57:59 +05:30

51 lines
1.3 KiB
Solidity

//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
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;
}
function toInt(uint x) internal pure returns (int y) {
y = int(x);
require(y >= 0, "int-overflow");
}
function toRad(uint wad) internal pure returns (uint rad) {
rad = mul(wad, 10 ** 27);
}
}