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use core::fmt::Debug;
#[derive(Hash, Eq, PartialEq, Clone, Debug)]
pub struct H256([u8;32]);
pub type Address = H256;
pub type StorageKey = H256;
impl From<[u8; 32]> for H256 {
#[inline]
fn from(bytes: [u8; 32]) -> Self {
H256(bytes)
}
}
impl<'a> From<&'a [u8; 32]> for H256 {
#[inline]
fn from(bytes: &'a [u8; 32]) -> Self {
H256(*bytes)
}
}
impl<'a> From<&'a mut [u8; 32]> for H256 {
#[inline]
fn from(bytes: &'a mut [u8; 32]) -> Self {
H256(*bytes)
}
}
impl H256 {
pub fn from_slice(slice: &[u8]) -> Self {
let mut i = 0;
let mut arr = [0u8; 32];
while i < 32 && i < slice.len() {
arr[i] = slice[i];
i += 1;
}
H256(arr)
}
}
impl From<H256> for [u8; 32] {
#[inline]
fn from(s: H256) -> Self {
s.0
}
}
impl AsRef<[u8]> for H256 {
#[inline]
fn as_ref(&self) -> &[u8] {
self.as_bytes()
}
}
impl AsMut<[u8]> for H256 {
#[inline]
fn as_mut(&mut self) -> &mut [u8] {
self.as_bytes_mut()
}
}
impl H256 {
#[inline]
pub fn repeat_byte(byte: u8) -> H256 {
H256([byte; 32])
}
#[inline]
pub fn zero() -> H256 {
H256::repeat_byte(0u8)
}
#[inline]
pub fn len_bytes() -> usize {
32
}
#[inline]
pub fn as_bytes(&self) -> &[u8] {
&self.0
}
#[inline]
pub fn as_bytes_mut(&mut self) -> &mut [u8] {
&mut self.0
}
#[inline]
pub fn as_fixed_bytes(&self) -> &[u8; 32] {
&self.0
}
#[inline]
pub fn copy_to_array(&self, target: &mut [u8; 32]) {
target.copy_from_slice(&self.0[..]);
}
}
use serde::ser::{Serialize, Serializer, SerializeTuple};
use serde::de::{Deserialize, Deserializer, Visitor, SeqAccess, Error};
impl Serialize for H256 {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
let mut seq = serializer.serialize_tuple(32)?;
for i in 0..32 {
seq.serialize_element(&self.0[i])?;
}
seq.end()
}
}
struct H256Visitor;
impl<'a> Visitor<'a> for H256Visitor {
type Value = H256;
fn expecting(&self, formatter: &mut core::fmt::Formatter) -> core::fmt::Result {
formatter.write_str("H256")
}
fn visit_seq<A>(self, mut seq: A) -> Result<H256, A::Error>
where A: SeqAccess<'a>
{
let mut arr = [0u8; 32];
for i in 0..32 {
arr[i] = seq.next_element()?
.ok_or_else(|| Error::invalid_length(i, &self))?;
}
Ok(H256(arr))
}
}
impl<'de> Deserialize<'de> for H256 {
fn deserialize<D>(deserializer: D) -> Result<H256, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_tuple(32, H256Visitor)
}
}
#[cfg(test)]
mod tests {
use super::*;
use alloc::vec::Vec;
use crate::serializer::tests::ser_deser_ok;
use crate::serializer::to_bytes;
#[test]
fn test_address() {
let addr = Address::from([4u8; 32]);
ser_deser_ok(addr, &[4u8; 32]);
}
#[test]
fn test_opt_address() {
let addr = Address::from([4u8; 32]);
let mut expected: Vec<u8> = Vec::new();
expected.push(1u8);
expected.extend_from_slice(&[4u8; 32]);
ser_deser_ok(Some(addr), expected.as_slice());
}
#[test]
fn test_ser_address_ref() {
let addr = Address::from([4u8; 32]);
let expected_bytes: &[u8] = &[4u8; 32*3];
let tuple = (&addr, &&&addr, addr.clone());
let serialized_bytes = to_bytes(&tuple).unwrap();
assert_eq!(serialized_bytes.as_slice(), expected_bytes);
}
}