CarefulMath

Derived from OpenZeppelin's SafeMath library https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/math/SafeMath.sol

MathError

Possible error codes that we can return

enum MathError {
  NO_ERROR,
  DIVISION_BY_ZERO,
  INTEGER_OVERFLOW,
  INTEGER_UNDERFLOW
}

function mulUInt(uint256 a, uint256 b) internal pure returns (enum CarefulMath.MathError, uint256)

Multiplies two numbers, returns an error on overflow.

function divUInt(uint256 a, uint256 b) internal pure returns (enum CarefulMath.MathError, uint256)

Integer division of two numbers, truncating the quotient.

function subUInt(uint256 a, uint256 b) internal pure returns (enum CarefulMath.MathError, uint256)

Subtracts two numbers, returns an error on overflow (i.e. if subtrahend is greater than minuend).

function addUInt(uint256 a, uint256 b) internal pure returns (enum CarefulMath.MathError, uint256)

Adds two numbers, returns an error on overflow.

function addThenSubUInt(uint256 a, uint256 b, uint256 c) internal pure returns (enum CarefulMath.MathError, uint256)

add a and b and then subtract c

function min(uint256 a, uint256 b) internal pure returns (uint256)

min and max functions

function max(uint256 a, uint256 b) internal pure returns (uint256)

uint256 MAXUINT

uint256 MAXUINT96

uint256 MAXUINT24