pub fn absolute(a: Int128) -> Result(Int128, Overflow)

pub fn add(a: Int128, b: BigInt) -> Result(Int128, Overflow)

pub fn compare(a: Int128, b: Int128) -> Order

pub fn divide(a: Int128, b: BigInt) -> Result(Int128, Overflow)

pub fn divide_no_zero(
  a: Int128,
  b: BigInt,
) -> Result(Result(Int128, Overflow), Nil)

pub fn eject(op: Result(Int128, Overflow)) -> BigInt

pub fn from_bigint(value: BigInt) -> Result(Int128, Overflow)

pub fn modulo(a: Int128, b: BigInt) -> Result(Int128, Overflow)

pub fn modulo_no_zero(
  a: Int128,
  b: BigInt,
) -> Result(Result(Int128, Overflow), Nil)

pub fn multiply(a: Int128, b: BigInt) -> Result(Int128, Overflow)

pub fn overflow(op: Result(Int128, Overflow)) -> Int128

pub fn power(a: Int128, b: Uint) -> Result(Int128, Overflow)

pub fn remainder(
  a: Int128,
  b: BigInt,
) -> Result(Int128, Overflow)

pub fn remainder_no_zero(
  a: Int128,
  b: BigInt,
) -> Result(Result(Int128, Overflow), Nil)

pub fn subtract(a: Int128, b: BigInt) -> Result(Int128, Overflow)

pub fn to_bigint(uint: Int128) -> BigInt