What the developer wrote
Authored by Mitchell Bagot
Add force_compressed to PublicKey
Currently, users who need to convert from a PublicKey to a
CompressedPublicKey must do so in a fallible manner through a try_from
or try_into call. While this is suitable for most uses, some users may
wish to forcibly convert the key to a compressed key, discarding any
compressedness information.
Add force_compressed to PublicKey to convert to CompressedPublicKey
discarding compressedness.
What changed, and why it matters
This commit adds a new convenience method called force_compressed to the PublicKey type in the rust-bitcoin library. It lets callers convert a public key into a compressed public key without handling a possible failure case. The change is purely additive (8 new lines, no deletions) and does not alter existing behavior or fix any bug. There is no indication of a security issue in the commit or supplied references.
No security action required. Treat as a normal API addition. Reviewers may want to confirm the documentation adequately warns callers that compressedness information is discarded, but this is a design/usability consideration rather than a vulnerability.
Security signals we found
No strong security signals were identified.
Evidence from the diff
The patch adds PublicKey::force_compressed(self) -> CompressedPublicKey in bitcoin/src/crypto/key.rs. It delegates to CompressedPublicKey::from_secp(self.to_inner()), discarding the original compressedness flag. The existing fallible TryFrom path remains unchanged. No existing code is modified, no unsafe code is introduced, and no cryptographic operations are changed.
Changed components
bitcoin/src/crypto/key.rsPublicKeyCompressedPublicKeyInspect captured patch +8 / −0
diff --git a/bitcoin/src/crypto/key.rs b/bitcoin/src/crypto/key.rs
index 285bb3de..a70a63ea 100644
--- a/bitcoin/src/crypto/key.rs
+++ b/bitcoin/src/crypto/key.rs
@@ -528,6 +528,14 @@ impl PublicKey {
Ok(key.p2wpkh_script_code())
}
+ /// Converts this [`PublicKey`] into a [`CompressedPublicKey`] infallibly.
+ ///
+ /// Unlike the `TryFrom` implementation, this function will discard compressedness
+ /// information on the [`PublicKey`].
+ pub fn force_compressed(self) -> CompressedPublicKey {
+ CompressedPublicKey::from_secp(self.to_inner())
+ }
+
/// Writes the public key into a writer.
///
/// # Errors
Why this scored 15/100
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