88 lines
2.3 KiB
Rust
88 lines
2.3 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::{
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serialization::{SerializationError, ZcashSerialize},
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sha256d_writer::Sha256dWriter,
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};
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use super::Transaction;
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/// A hash of a `Transaction`
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///
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/// TODO: I'm pretty sure this is also a SHA256d hash but I haven't
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/// confirmed it yet.
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#[derive(Copy, Clone, Eq, PartialEq, Serialize, Deserialize)]
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#[cfg_attr(test, derive(Arbitrary))]
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pub struct TransactionHash(pub [u8; 32]);
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impl From<Transaction> for TransactionHash {
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fn from(transaction: Transaction) -> Self {
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let mut hash_writer = Sha256dWriter::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::Debug for TransactionHash {
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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 TransactionHash {
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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(TransactionHash(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 std::io::Write;
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use crate::sha256d_writer::Sha256dWriter;
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use super::*;
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#[test]
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fn transactionhash_debug() {
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let preimage = b"foo bar baz";
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let mut sha_writer = Sha256dWriter::default();
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let _ = sha_writer.write_all(preimage);
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let hash = TransactionHash(sha_writer.finish());
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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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#[test]
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fn transactionhash_from_str() {
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let hash: TransactionHash =
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"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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