primitives

alloy-primitives

Primitive types shared by alloy, foundry, revm, and reth.

Types

• Unsigned integers re-exported from ruint
• Signed integers, as a wrapper around ruint integers
• Fixed-size byte arrays via [FixedBytes]
  • [wrap_fixed_bytes!]: macro for constructing named fixed bytes types
  • [Address], which is a fixed-size byte array of 20 bytes, with EIP-55 and EIP-1191 checksum support
  • [fixed_bytes!], [address!] and other macros to construct the types at compile time

Examples

This library has straightforward, basic, types. Usage is correspondingly simple. Please consult the documentation for more information.

use alloy_primitives::{address, fixed_bytes, Address, FixedBytes, I256, U256};

// FixedBytes
let n: FixedBytes<6> = fixed_bytes!("1234567890ab");
assert_eq!(n, "0x1234567890ab".parse::<FixedBytes<6>>().unwrap());
assert_eq!(n.to_string(), "0x1234567890ab");

// Uint
let mut n: U256 = "42".parse().unwrap();
n += U256::from(10);
assert_eq!(n.to_string(), "52");

// Signed
let mut n: I256 = "-42".parse().unwrap();
n = -n;
assert_eq!(n.to_string(), "42");

// Address
let addr_str = "0x66f9664f97F2b50F62D13eA064982f936dE76657";
let addr: Address = Address::parse_checksummed(addr_str, None).unwrap();
assert_eq!(addr, address!("66f9664f97F2b50F62D13eA064982f936dE76657"));
assert_eq!(addr.to_checksum(None), addr_str);

// Address checksummed with a custom chain id
let addr_str = "0x66F9664f97f2B50F62d13EA064982F936de76657";
let addr: Address = Address::parse_checksummed(addr_str, Some(30)).unwrap();
assert_eq!(addr, address!("66F9664f97f2B50F62d13EA064982F936de76657"));
assert_eq!(addr.to_checksum(Some(30)), addr_str);