raiden_primitives/
hashing.rs

1#![warn(clippy::missing_docs_in_private_items)]
2
3use sha2::{
4	Digest,
5	Sha256,
6};
7use web3::signing::keccak256;
8
9use crate::{
10	constants::LOCKSROOT_OF_NO_LOCKS,
11	types::{
12		BalanceHash,
13		LockedAmount,
14		Locksroot,
15		TokenAmount,
16	},
17};
18
19/// Return the hash of the secret in bytes.
20pub fn hash_secret(secret: &[u8]) -> [u8; 32] {
21	let mut hasher = Sha256::new();
22	hasher.update(secret);
23	hasher.finalize().into()
24}
25
26/// Return the hash of the balance data.
27pub fn hash_balance_data(
28	transferred_amount: TokenAmount,
29	locked_amount: LockedAmount,
30	locksroot: Locksroot,
31) -> Result<BalanceHash, String> {
32	if locksroot.is_zero() {
33		return Err("Can't hash empty locksroot".to_string())
34	}
35
36	if locksroot.0.len() != 32 {
37		return Err("Locksroot has wrong length".to_string())
38	}
39
40	if transferred_amount == TokenAmount::zero() &&
41		locked_amount == TokenAmount::zero() &&
42		locksroot == *LOCKSROOT_OF_NO_LOCKS
43	{
44		return Ok(BalanceHash::zero())
45	}
46
47	let mut transferred_amount_in_bytes: [u8; 32] = [0; 32];
48	transferred_amount.to_big_endian(&mut transferred_amount_in_bytes);
49
50	let mut locked_amount_in_bytes: [u8; 32] = [0; 32];
51	locked_amount.to_big_endian(&mut locked_amount_in_bytes);
52
53	let hash = keccak256(
54		&[&transferred_amount_in_bytes[..], &locked_amount_in_bytes[..], &locksroot.0[..]].concat(),
55	);
56	Ok(BalanceHash::from_slice(&hash))
57}
raiden_primitives/hashing.rs

raiden_primitives/
hashing.rs
