ABI.Math (abi v0.1.21)

Helper functions for ABI's math functions.

Summary

Functions

kec(data)

Returns the keccak sha256 of a given input.

mod(x, n)

Simple function to compute modulo function to work on integers of any sign.

Functions

kec(data)

@spec kec(binary()) :: binary()

Returns the keccak sha256 of a given input.

Examples

iex> ABI.Math.kec("hello world")
<<71, 23, 50, 133, 168, 215, 52, 30, 94, 151, 47, 198, 119, 40, 99,
  132, 248, 2, 248, 239, 66, 165, 236, 95, 3, 187, 250, 37, 76, 176,
  31, 173>>

iex> ABI.Math.kec(<<0x01, 0x02, 0x03>>)
<<241, 136, 94, 218, 84, 183, 160, 83, 49, 140, 212, 30, 32, 147, 34,
  13, 171, 21, 214, 83, 129, 177, 21, 122, 54, 51, 168, 59, 253, 92,
  146, 57>>

mod(x, n)

Simple function to compute modulo function to work on integers of any sign.

Examples

iex> ABI.Math.mod(5, 2)
1

iex> ABI.Math.mod(-5, 1337)
1332

iex> ABI.Math.mod(1337 + 5, 1337)
5

iex> ABI.Math.mod(0, 1337)
0