72 lines
1.9 KiB
Rust
72 lines
1.9 KiB
Rust
#![allow(clippy::unit_arg)]
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use std::fmt;
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#[cfg(test)]
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use proptest_derive::Arbitrary;
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use serde::{Deserialize, Serialize};
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use crate::serialization::{sha256d, SerializationError, ZcashSerialize};
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use super::Transaction;
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/// A transaction hash.
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///
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/// Note: Zebra displays transaction and block hashes in their actual byte-order,
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/// not in reversed byte-order.
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#[derive(Copy, Clone, Eq, PartialEq, Serialize, Deserialize, Hash)]
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#[cfg_attr(test, derive(Arbitrary))]
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pub struct Hash(pub [u8; 32]);
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impl<'a> From<&'a Transaction> for Hash {
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fn from(transaction: &'a Transaction) -> Self {
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let mut hash_writer = sha256d::Writer::default();
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transaction
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.zcash_serialize(&mut hash_writer)
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.expect("Transactions must serialize into the hash.");
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Self(hash_writer.finish())
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}
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}
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impl fmt::Display for Hash {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.write_str(&hex::encode(&self.0))
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}
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}
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impl fmt::Debug for Hash {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.debug_tuple("TransactionHash")
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.field(&hex::encode(&self.0))
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.finish()
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}
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}
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impl std::str::FromStr for Hash {
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type Err = SerializationError;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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let mut bytes = [0; 32];
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if hex::decode_to_slice(s, &mut bytes[..]).is_err() {
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Err(SerializationError::Parse("hex decoding error"))
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} else {
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Ok(Hash(bytes))
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn transactionhash_from_str() {
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let hash: Hash = "bf46b4b5030752fedac6f884976162bbfb29a9398f104a280b3e34d51b416631"
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.parse()
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.unwrap();
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assert_eq!(
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format!("{:?}", hash),
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r#"TransactionHash("bf46b4b5030752fedac6f884976162bbfb29a9398f104a280b3e34d51b416631")"#
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);
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}
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}
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