parity-common/README.md

bigint

Fixed-sized integers arithmetic

To specify a dependency, add to Cargo.toml

[dependencies]
ethereum-types = "0.2"

Little example

extern crate ethereum_types;
use ethereum_types::U256;

fn main() {
	let mut val: U256 = 1023.into();
	for _ in 0..200 { val = val * 2.into() }
	assert_eq!(
		&format!("{}", val),
		"1643897619276947051879427220465009342380213662639797070513307648"
	);
}

no_std crates

This crate has a feature, std, that is enabled by default. To use this crate in a no_std context, add the following to your Cargo.toml:

[dependencies]
ethereum-types = { version = "4", default-features = false }