55 lines
1.6 KiB
Rust
55 lines
1.6 KiB
Rust
//! A binary hash tree of SHA256d (two rounds of SHA256) hashes for
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//! node values.
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#![allow(clippy::unit_arg)]
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use std::{fmt, io};
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#[cfg(test)]
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use proptest_derive::Arbitrary;
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use crate::serialization::{sha256d, SerializationError, ZcashDeserialize, ZcashSerialize};
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use crate::transaction::Transaction;
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/// A binary hash tree of SHA256d (two rounds of SHA256) hashes for
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/// node values.
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#[derive(Default)]
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pub struct MerkleTree<T> {
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_leaves: Vec<T>,
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}
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impl<Transaction> ZcashSerialize for MerkleTree<Transaction> {
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fn zcash_serialize<W: io::Write>(&self, _writer: W) -> Result<(), io::Error> {
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unimplemented!();
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}
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}
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impl<Transaction> ZcashDeserialize for MerkleTree<Transaction> {
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fn zcash_deserialize<R: io::Read>(_reader: R) -> Result<Self, SerializationError> {
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unimplemented!();
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}
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}
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/// A SHA-256d hash of the root node of a merkle tree of SHA256-d
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/// hashed transactions in a block.
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#[derive(Clone, Copy, Eq, PartialEq, Serialize, Deserialize)]
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#[cfg_attr(test, derive(Arbitrary))]
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pub struct MerkleTreeRootHash(pub [u8; 32]);
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impl From<MerkleTree<Transaction>> for MerkleTreeRootHash {
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fn from(merkle_tree: MerkleTree<Transaction>) -> Self {
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let mut hash_writer = sha256d::Writer::default();
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merkle_tree
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.zcash_serialize(&mut hash_writer)
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.expect("Sha256dWriter is infallible");
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Self(hash_writer.finish())
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}
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}
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impl fmt::Debug for MerkleTreeRootHash {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.debug_tuple("MerkleTreeRootHash")
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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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