transaction: deprecate SigHashType::from_u32 in favor of from_u32_consensus

Signed-off-by: Antoine Poinsot <darosior@protonmail.com>

src/blockdata/transaction.rs

@@ -686,11 +686,17 @@ impl SigHashType {
          }
      }
 
+     /// Reads a 4-byte uint32 as a sighash type.
+     #[deprecated(since="0.26.1", note="please use `from_u32_consensus` or `from_u32_standard` instead")]
+     pub fn from_u32(n: u32) -> SigHashType {
+         Self::from_u32_consensus(n)
+     }
+
      /// Reads a 4-byte uint32 as a sighash type.
      ///
      /// **Note**: this replicates consensus behaviour, for current standardness rules correctness
      /// you probably want [from_u32_standard].
-     pub fn from_u32(n: u32) -> SigHashType {
+     pub fn from_u32_consensus(n: u32) -> SigHashType {
          // In Bitcoin Core, the SignatureHash function will mask the (int32) value with
          // 0x1f to (apparently) deactivate ACP when checking for SINGLE and NONE bits.
          // We however want to be matching also against on ACP-masked ALL, SINGLE, and NONE.

src/util/bip143.rs

@@ -292,7 +292,7 @@ mod tests {
         let raw_expected = SigHash::from_hex(expected_result).unwrap();
         let expected_result = SigHash::from_slice(&raw_expected[..]).unwrap();
         let mut cache = SigHashCache::new(&tx);
-        let sighash_type = SigHashType::from_u32(hash_type);
+        let sighash_type = SigHashType::from_u32_consensus(hash_type);
         let actual_result = cache.signature_hash(input_index, &script, value, sighash_type);
         assert_eq!(actual_result, expected_result);
     }

src/util/psbt/serialize.rs

@@ -132,7 +132,7 @@ impl Serialize for SigHashType {
 impl Deserialize for SigHashType {
     fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
         let raw: u32 = encode::deserialize(bytes)?;
-        let rv: SigHashType = SigHashType::from_u32(raw);
+        let rv: SigHashType = SigHashType::from_u32_consensus(raw);
 
         if rv.as_u32() == raw {
             Ok(rv)