openethereum/crates/ethjson/src/hash.rs

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

149 lines
4.8 KiB
Rust
Raw Normal View History

2020-09-22 14:53:52 +02:00
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.
2016-03-15 18:17:48 +01:00
2020-09-22 14:53:52 +02:00
// OpenEthereum is free software: you can redistribute it and/or modify
2016-03-15 18:17:48 +01:00
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
2020-09-22 14:53:52 +02:00
// OpenEthereum is distributed in the hope that it will be useful,
2016-03-15 18:17:48 +01:00
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
2020-09-22 14:53:52 +02:00
// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
2016-03-15 18:17:48 +01:00
//! Lenient hash json deserialization for test json files.
use ethereum_types::{
Bloom as Hash2048, H160 as Hash160, H256 as Hash256, H520 as Hash520, H64 as Hash64,
};
2017-07-06 11:36:15 +02:00
use rustc_hex::ToHex;
use serde::{
de::{Error, Visitor},
Deserialize, Deserializer, Serialize, Serializer,
2020-08-05 06:08:03 +02:00
};
use std::{fmt, str::FromStr};
2016-03-15 18:17:48 +01:00
macro_rules! impl_hash {
($name: ident, $inner: ident) => {
/// Lenient hash json deserialization for test json files.
#[derive(Default, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, Clone)]
pub struct $name(pub $inner);
2020-08-05 06:08:03 +02:00
impl From<$name> for $inner {
fn from(other: $name) -> $inner {
other.0
2020-08-05 06:08:03 +02:00
}
}
2020-08-05 06:08:03 +02:00
impl From<$inner> for $name {
fn from(i: $inner) -> Self {
$name(i)
2020-08-05 06:08:03 +02:00
}
}
2020-08-05 06:08:03 +02:00
2017-07-06 11:36:15 +02:00
impl<'a> Deserialize<'a> for $name {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
2017-07-06 11:36:15 +02:00
where
D: Deserializer<'a>,
{
struct HashVisitor;
2020-08-05 06:08:03 +02:00
2017-07-06 11:36:15 +02:00
impl<'b> Visitor<'b> for HashVisitor {
type Value = $name;
2020-08-05 06:08:03 +02:00
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "a 0x-prefixed hex-encoded hash")
}
2020-08-05 06:08:03 +02:00
fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
where
E: Error,
{
let value = match value.len() {
0 => $inner::from(0),
2016-03-17 13:41:11 +01:00
2 if value == "0x" => $inner::from(0),
_ if value.starts_with("0x") => {
$inner::from_str(&value[2..]).map_err(|e| {
Error::custom(
format!("Invalid hex value {}: {}", value, e).as_str(),
)
})?
2020-08-05 06:08:03 +02:00
}
_ => $inner::from_str(value).map_err(|e| {
Error::custom(
format!("Invalid hex value {}: {}", value, e).as_str(),
)
})?,
};
2020-08-05 06:08:03 +02:00
Ok($name(value))
}
2020-08-05 06:08:03 +02:00
fn visit_string<E>(self, value: String) -> Result<Self::Value, E>
where
E: Error,
{
self.visit_str(value.as_ref())
}
2020-08-05 06:08:03 +02:00
}
2017-07-06 11:36:15 +02:00
deserializer.deserialize_any(HashVisitor)
}
}
2020-08-05 06:08:03 +02:00
impl Serialize for $name {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut hex = "0x".to_owned();
hex.push_str(&self.0.to_hex());
serializer.serialize_str(&hex)
}
2016-03-15 18:17:48 +01:00
}
2020-08-05 06:08:03 +02:00
};
2016-03-15 18:17:48 +01:00
}
impl_hash!(H64, Hash64);
impl_hash!(Address, Hash160);
impl_hash!(H256, Hash256);
2016-12-14 12:14:04 +01:00
impl_hash!(H520, Hash520);
impl_hash!(Bloom, Hash2048);
2016-03-15 18:17:48 +01:00
#[cfg(test)]
mod test {
use ethereum_types;
use hash::H256;
2016-03-15 18:17:48 +01:00
use serde_json;
use std::str::FromStr;
2020-08-05 06:08:03 +02:00
2016-03-15 18:17:48 +01:00
#[test]
fn hash_deserialization() {
2016-03-15 18:17:48 +01:00
let s = r#"["", "5a39ed1020c04d4d84539975b893a4e7c53eab6c2965db8bc3468093a31bc5ae"]"#;
let deserialized: Vec<H256> = serde_json::from_str(s).unwrap();
2016-03-15 18:17:48 +01:00
assert_eq!(
deserialized,
vec![
H256(ethereum_types::H256::from(0)),
H256(
ethereum_types::H256::from_str(
"5a39ed1020c04d4d84539975b893a4e7c53eab6c2965db8bc3468093a31bc5ae"
2020-08-05 06:08:03 +02:00
)
.unwrap()
2020-08-05 06:08:03 +02:00
)
2016-03-15 18:17:48 +01:00
]
);
}
2020-08-05 06:08:03 +02:00
2016-03-15 18:17:48 +01:00
#[test]
fn hash_into() {
assert_eq!(
ethereum_types::H256::from(0),
H256(ethereum_types::H256::from(0)).into()
);
2016-03-15 18:17:48 +01:00
}
}