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rust-bitcoin-unsafe-fast
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Remove BlockHash::all_zeros 

Recently we removed the `all_zeros` function from `OutPoint` in favour
of a more meaningfully named associated const. We can do the same for
`BlockHash`, the all zeros has is used for the previous blockhash of the
genesis block, add a const named as such.

In test code where we use the `all_zeros` function, just use the more
explicit form `from_byte_array([0; 32])`.
This commit is contained in:
Tobin C. Harding 2024-09-23 13:51:45 +10:00
parent 20d8dbd586
commit 6b9429ac7b
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GPG Key ID: 40BF9E4C269D6607
5 changed files with 16 additions and 19 deletions
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4
bitcoin/src/bip152.rs
View File

@ -497,7 +497,7 @@ mod test {
{
// test serialization
let raw: Vec<u8> = serialize(&BlockTransactionsRequest {
block_hash: BlockHash::all_zeros(),
block_hash: BlockHash::from_byte_array([0; 32]),
indexes: testcase.1,
});
let mut expected_raw: Vec<u8> = [0u8; 32].to_vec();
@ -520,7 +520,7 @@ mod test {
#[should_panic] // 'attempt to add with overflow' in consensus_encode()
fn test_getblocktx_panic_when_encoding_u64_max() {
serialize(&BlockTransactionsRequest {
block_hash: BlockHash::all_zeros(),
block_hash: BlockHash::from_byte_array([0; 32]),
indexes: vec![u64::MAX],
});
}

7
bitcoin/src/blockdata/block.rs
View File

@ -32,11 +32,8 @@ hashes::hash_newtype! {
impl_hashencode!(BlockHash);
impl BlockHash {
/// The "all zeros" blockhash.
///
/// This is not the hash of a real block. It is used as the previous blockhash
/// of the genesis block and in other placeholder contexts.
pub fn all_zeros() -> Self { Self::from_byte_array([0; 32]) }
/// Dummy hash used as the previous blockhash of the genesis block.
pub const GENESIS_PREVIOUS_BLOCK_HASH: Self = Self::from_byte_array([0; 32]);
}
/// Bitcoin block header.

14
bitcoin/src/blockdata/constants.rs
View File

@ -113,7 +113,7 @@ pub fn genesis_block(params: impl AsRef<Params>) -> Block {
Network::Bitcoin => Block {
header: block::Header {
version: block::Version::ONE,
prev_blockhash: BlockHash::all_zeros(),
prev_blockhash: BlockHash::GENESIS_PREVIOUS_BLOCK_HASH,
merkle_root,
time: 1231006505,
bits: CompactTarget::from_consensus(0x1d00ffff),
@ -124,7 +124,7 @@ pub fn genesis_block(params: impl AsRef<Params>) -> Block {
Network::Testnet => Block {
header: block::Header {
version: block::Version::ONE,
prev_blockhash: BlockHash::all_zeros(),
prev_blockhash: BlockHash::GENESIS_PREVIOUS_BLOCK_HASH,
merkle_root,
time: 1296688602,
bits: CompactTarget::from_consensus(0x1d00ffff),
@ -135,7 +135,7 @@ pub fn genesis_block(params: impl AsRef<Params>) -> Block {
Network::Signet => Block {
header: block::Header {
version: block::Version::ONE,
prev_blockhash: BlockHash::all_zeros(),
prev_blockhash: BlockHash::GENESIS_PREVIOUS_BLOCK_HASH,
merkle_root,
time: 1598918400,
bits: CompactTarget::from_consensus(0x1e0377ae),
@ -146,7 +146,7 @@ pub fn genesis_block(params: impl AsRef<Params>) -> Block {
Network::Regtest => Block {
header: block::Header {
version: block::Version::ONE,
prev_blockhash: BlockHash::all_zeros(),
prev_blockhash: BlockHash::GENESIS_PREVIOUS_BLOCK_HASH,
merkle_root,
time: 1296688602,
bits: CompactTarget::from_consensus(0x207fffff),
@ -261,7 +261,7 @@ mod test {
let gen = genesis_block(&params::MAINNET);
assert_eq!(gen.header.version, block::Version::ONE);
assert_eq!(gen.header.prev_blockhash, BlockHash::all_zeros());
assert_eq!(gen.header.prev_blockhash, BlockHash::GENESIS_PREVIOUS_BLOCK_HASH);
assert_eq!(
gen.header.merkle_root.to_string(),
"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"
@ -280,7 +280,7 @@ mod test {
fn testnet_genesis_full_block() {
let gen = genesis_block(&params::TESTNET);
assert_eq!(gen.header.version, block::Version::ONE);
assert_eq!(gen.header.prev_blockhash, BlockHash::all_zeros());
assert_eq!(gen.header.prev_blockhash, BlockHash::GENESIS_PREVIOUS_BLOCK_HASH);
assert_eq!(
gen.header.merkle_root.to_string(),
"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"
@ -298,7 +298,7 @@ mod test {
fn signet_genesis_full_block() {
let gen = genesis_block(&params::SIGNET);
assert_eq!(gen.header.version, block::Version::ONE);
assert_eq!(gen.header.prev_blockhash, BlockHash::all_zeros());
assert_eq!(gen.header.prev_blockhash, BlockHash::GENESIS_PREVIOUS_BLOCK_HASH);
assert_eq!(
gen.header.merkle_root.to_string(),
"4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"

4
bitcoin/src/p2p/message_blockdata.rs
View File

@ -159,7 +159,7 @@ mod tests {
assert_eq!(real_decode.version, 70002);
assert_eq!(real_decode.locator_hashes.len(), 1);
assert_eq!(serialize(&real_decode.locator_hashes[0]), genhash);
assert_eq!(real_decode.stop_hash, BlockHash::all_zeros());
assert_eq!(real_decode.stop_hash, BlockHash::GENESIS_PREVIOUS_BLOCK_HASH);
assert_eq!(serialize(&real_decode), from_sat);
}
@ -175,7 +175,7 @@ mod tests {
assert_eq!(real_decode.version, 70002);
assert_eq!(real_decode.locator_hashes.len(), 1);
assert_eq!(serialize(&real_decode.locator_hashes[0]), genhash);
assert_eq!(real_decode.stop_hash, BlockHash::all_zeros());
assert_eq!(real_decode.stop_hash, BlockHash::GENESIS_PREVIOUS_BLOCK_HASH);
assert_eq!(serialize(&real_decode), from_sat);
}

6
bitcoin/src/pow.rs
View File

@ -1771,7 +1771,7 @@ mod tests {
// Block 2015, the only information used are `bits` and `time`
let current = Header {
version: Version::ONE,
prev_blockhash: BlockHash::all_zeros(),
prev_blockhash: BlockHash::from_byte_array([0; 32]),
merkle_root: TxMerkleNode::from_byte_array([0; 32]),
time: 1599332177,
bits: epoch_start.bits,
@ -1793,7 +1793,7 @@ mod tests {
// Block 2016, the only information used is `time`
let epoch_start = Header {
version: Version::ONE,
prev_blockhash: BlockHash::all_zeros(),
prev_blockhash: BlockHash::from_byte_array([0; 32]),
merkle_root: TxMerkleNode::from_byte_array([0; 32]),
time: 1599332844,
bits: starting_bits,
@ -1803,7 +1803,7 @@ mod tests {
// Block 4031, the only information used are `bits` and `time`
let current = Header {
version: Version::ONE,
prev_blockhash: BlockHash::all_zeros(),
prev_blockhash: BlockHash::from_byte_array([0; 32]),
merkle_root: TxMerkleNode::from_byte_array([0; 32]),
time: 1600591200,
bits: starting_bits,