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Merge rust-bitcoin/rust-bitcoin#4522: fix(taproot): raname `from_key_and_tweak` to `from_key_and_merkle_root` 

d74eede260 fix(taproot): raname `from_key_and_tweak` to `from_key_and_merkle_root` (Luis Schwab)

Pull request description:

  Closes #4236.

  ### Changelog
  - Rename `TapTweakHash::from_key_and_tweak` to `TapTweakHash::from_key_and_merkle_root`. The naming was just wrong, since a TapTweak takes in a public key and a Merkle root to produce a tweak.

ACKs for top commit:
  apoelstra:
    ACK d74eede26064a40d70c7aeb3335b9a4a28eb6bd9; successfully ran local tests
  tcharding:
    ACK d74eede260

Tree-SHA512: 03fdb73758f965290c083165b23a0345325e475f159aa76ff141a9aa3251960041366ddf195b74cada7b289d4493190cf9b17130736002d48b6fac68941012fb
This commit is contained in:
merge-script 2025-05-17 11:54:47 +00:00
parent 27caa6bb21 d74eede260
commit 8985c9e5c4
No known key found for this signature in database
GPG Key ID: C588D63CE41B97C1
3 changed files with 8 additions and 8 deletions
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4
bitcoin/src/crypto/key.rs
View File

@ -940,7 +940,7 @@ impl TapTweak for UntweakedPublicKey {
secp: &Secp256k1<C>,
merkle_root: Option<TapNodeHash>,
) -> (TweakedPublicKey, Parity) {
let tweak = TapTweakHash::from_key_and_tweak(self, merkle_root).to_scalar();
let tweak = TapTweakHash::from_key_and_merkle_root(self, merkle_root).to_scalar();
let (output_key, parity) = self.add_tweak(secp, &tweak).expect("Tap tweak failed");
debug_assert!(self.tweak_add_check(secp, &output_key, parity, tweak));
@ -970,7 +970,7 @@ impl TapTweak for UntweakedKeypair {
merkle_root: Option<TapNodeHash>,
) -> TweakedKeypair {
let (pubkey, _parity) = XOnlyPublicKey::from_keypair(&self);
let tweak = TapTweakHash::from_key_and_tweak(pubkey, merkle_root).to_scalar();
let tweak = TapTweakHash::from_key_and_merkle_root(pubkey, merkle_root).to_scalar();
let tweaked = self.add_xonly_tweak(secp, &tweak).expect("Tap tweak failed");
TweakedKeypair(tweaked)
}

2
bitcoin/src/crypto/sighash.rs
View File

@ -2009,7 +2009,7 @@ mod tests {
// tests
let keypair = secp256k1::Keypair::from_secret_key(secp, &internal_priv_key);
let (internal_key, _parity) = XOnlyPublicKey::from_keypair(&keypair);
let tweak = TapTweakHash::from_key_and_tweak(internal_key, merkle_root);
let tweak = TapTweakHash::from_key_and_merkle_root(internal_key, merkle_root);
let tweaked_keypair = keypair.add_xonly_tweak(secp, &tweak.to_scalar()).unwrap();
let mut sig_msg = Vec::new();
cache

10
bitcoin/src/taproot/mod.rs
View File

@ -95,9 +95,9 @@ impl From<TapLeafHash> for TapNodeHash {
}
impl TapTweakHash {
/// Constructs a new BIP341 [`TapTweakHash`] from key and tweak. Produces `H_taptweak(P||R)` where
/// Constructs a new BIP341 [`TapTweakHash`] from key and Merkle root. Produces `H_taptweak(P||R)` where
/// `P` is the internal key and `R` is the Merkle root.
pub fn from_key_and_tweak<K: Into<UntweakedPublicKey>>(
pub fn from_key_and_merkle_root<K: Into<UntweakedPublicKey>>(
internal_key: K,
merkle_root: Option<TapNodeHash>,
) -> TapTweakHash {
@ -293,7 +293,7 @@ impl TaprootSpendInfo {
/// Returns the `TapTweakHash` for this [`TaprootSpendInfo`] i.e., the tweak using `internal_key`
/// and `merkle_root`.
pub fn tap_tweak(&self) -> TapTweakHash {
TapTweakHash::from_key_and_tweak(self.internal_key, self.merkle_root)
TapTweakHash::from_key_and_merkle_root(self.internal_key, self.merkle_root)
}
/// Returns the internal key for this [`TaprootSpendInfo`].
@ -1305,7 +1305,7 @@ impl<Branch: AsRef<TaprootMerkleBranch> + ?Sized> ControlBlock<Branch> {
}
// compute the taptweak
let tweak =
TapTweakHash::from_key_and_tweak(self.internal_key, Some(curr_hash)).to_scalar();
TapTweakHash::from_key_and_merkle_root(self.internal_key, Some(curr_hash)).to_scalar();
self.internal_key.tweak_add_check(secp, &output_key, self.output_key_parity, tweak)
}
}
@ -2103,7 +2103,7 @@ mod test {
.unwrap()
.assume_checked();
let tweak = TapTweakHash::from_key_and_tweak(internal_key, merkle_root);
let tweak = TapTweakHash::from_key_and_merkle_root(internal_key, merkle_root);
let (output_key, _parity) = internal_key.tap_tweak(secp, merkle_root);
let addr = Address::p2tr(secp, internal_key, merkle_root, KnownHrp::Mainnet);
let spk = addr.script_pubkey();