ethereum_types/
hash.rs

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1// Copyright 2020 Parity Technologies
2//
3// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
4// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
5// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
6// option. This file may not be copied, modified, or distributed
7// except according to those terms.
8
9use crate::{U128, U256, U512, U64};
10use fixed_hash::*;
11#[cfg(feature = "codec")]
12use impl_codec::impl_fixed_hash_codec;
13#[cfg(feature = "rlp")]
14use impl_rlp::impl_fixed_hash_rlp;
15#[cfg(feature = "serialize")]
16use impl_serde::impl_fixed_hash_serde;
17
18pub trait BigEndianHash {
19	type Uint;
20
21	fn from_uint(val: &Self::Uint) -> Self;
22	fn into_uint(&self) -> Self::Uint;
23}
24
25construct_fixed_hash! { pub struct H32(4); }
26#[cfg(feature = "rlp")]
27impl_fixed_hash_rlp!(H32, 4);
28#[cfg(feature = "serialize")]
29impl_fixed_hash_serde!(H32, 4);
30#[cfg(feature = "codec")]
31impl_fixed_hash_codec!(H32, 4);
32
33construct_fixed_hash! {
34	#[cfg_attr(feature = "codec", derive(scale_info::TypeInfo))]
35	pub struct H64(8);
36}
37#[cfg(feature = "rlp")]
38impl_fixed_hash_rlp!(H64, 8);
39#[cfg(feature = "serialize")]
40impl_fixed_hash_serde!(H64, 8);
41#[cfg(feature = "codec")]
42impl_fixed_hash_codec!(H64, 8);
43
44pub use primitive_types::{H128, H160, H256};
45
46construct_fixed_hash! {
47	#[cfg_attr(feature = "codec", derive(scale_info::TypeInfo))]
48	pub struct H264(33);
49}
50#[cfg(feature = "rlp")]
51impl_fixed_hash_rlp!(H264, 33);
52#[cfg(feature = "serialize")]
53impl_fixed_hash_serde!(H264, 33);
54#[cfg(feature = "codec")]
55impl_fixed_hash_codec!(H264, 33);
56
57pub use primitive_types::H512;
58
59construct_fixed_hash! {
60	#[cfg_attr(feature = "codec", derive(scale_info::TypeInfo))]
61	pub struct H520(65);
62}
63#[cfg(feature = "rlp")]
64impl_fixed_hash_rlp!(H520, 65);
65#[cfg(feature = "serialize")]
66impl_fixed_hash_serde!(H520, 65);
67#[cfg(feature = "codec")]
68impl_fixed_hash_codec!(H520, 65);
69
70macro_rules! impl_uint_conversions {
71	($hash: ident, $uint: ident) => {
72		impl BigEndianHash for $hash {
73			type Uint = $uint;
74
75			fn from_uint(value: &$uint) -> Self {
76				let mut ret = $hash::zero();
77				value.to_big_endian(ret.as_bytes_mut());
78				ret
79			}
80
81			fn into_uint(&self) -> $uint {
82				$uint::from(self.as_ref() as &[u8])
83			}
84		}
85	};
86}
87
88impl_uint_conversions!(H64, U64);
89impl_uint_conversions!(H128, U128);
90impl_uint_conversions!(H256, U256);
91impl_uint_conversions!(H512, U512);
92
93#[cfg(test)]
94mod tests {
95	use super::{H160, H256};
96	use serde_json as ser;
97
98	#[test]
99	fn test_serialize_h160() {
100		let tests = vec![
101			(H160::from_low_u64_be(0), "0x0000000000000000000000000000000000000000"),
102			(H160::from_low_u64_be(2), "0x0000000000000000000000000000000000000002"),
103			(H160::from_low_u64_be(15), "0x000000000000000000000000000000000000000f"),
104			(H160::from_low_u64_be(16), "0x0000000000000000000000000000000000000010"),
105			(H160::from_low_u64_be(1_000), "0x00000000000000000000000000000000000003e8"),
106			(H160::from_low_u64_be(100_000), "0x00000000000000000000000000000000000186a0"),
107			(H160::from_low_u64_be(u64::max_value()), "0x000000000000000000000000ffffffffffffffff"),
108		];
109
110		for (number, expected) in tests {
111			assert_eq!(format!("{:?}", expected), ser::to_string_pretty(&number).unwrap());
112			assert_eq!(number, ser::from_str(&format!("{:?}", expected)).unwrap());
113		}
114	}
115
116	#[test]
117	fn test_serialize_h256() {
118		let tests = vec![
119			(H256::from_low_u64_be(0), "0x0000000000000000000000000000000000000000000000000000000000000000"),
120			(H256::from_low_u64_be(2), "0x0000000000000000000000000000000000000000000000000000000000000002"),
121			(H256::from_low_u64_be(15), "0x000000000000000000000000000000000000000000000000000000000000000f"),
122			(H256::from_low_u64_be(16), "0x0000000000000000000000000000000000000000000000000000000000000010"),
123			(H256::from_low_u64_be(1_000), "0x00000000000000000000000000000000000000000000000000000000000003e8"),
124			(H256::from_low_u64_be(100_000), "0x00000000000000000000000000000000000000000000000000000000000186a0"),
125			(
126				H256::from_low_u64_be(u64::max_value()),
127				"0x000000000000000000000000000000000000000000000000ffffffffffffffff",
128			),
129		];
130
131		for (number, expected) in tests {
132			assert_eq!(format!("{:?}", expected), ser::to_string_pretty(&number).unwrap());
133			assert_eq!(number, ser::from_str(&format!("{:?}", expected)).unwrap());
134		}
135	}
136
137	#[test]
138	fn test_parse_0x() {
139		assert!("0x0000000000000000000000000000000000000000000000000000000000000000"
140			.parse::<H256>()
141			.is_ok())
142	}
143
144	#[test]
145	fn test_serialize_invalid() {
146		assert!(ser::from_str::<H256>("\"0x000000000000000000000000000000000000000000000000000000000000000\"")
147			.unwrap_err()
148			.is_data());
149		assert!(ser::from_str::<H256>("\"0x000000000000000000000000000000000000000000000000000000000000000g\"")
150			.unwrap_err()
151			.is_data());
152		assert!(ser::from_str::<H256>("\"0x00000000000000000000000000000000000000000000000000000000000000000\"")
153			.unwrap_err()
154			.is_data());
155		assert!(ser::from_str::<H256>("\"\"").unwrap_err().is_data());
156		assert!(ser::from_str::<H256>("\"0\"").unwrap_err().is_data());
157		assert!(ser::from_str::<H256>("\"10\"").unwrap_err().is_data());
158	}
159}
ethereum_types/hash.rs

ethereum_types/
hash.rs
