consensus: implement Display for sighash types

consensus/src/sigtypes.rs

@@ -19,6 +19,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+use std::fmt::{self, Display, Formatter};
 use std::iter;
 
 use amplify::{ByteArray, Bytes32, Wrapper};
@@ -27,14 +28,15 @@ use secp256k1::{ecdsa, schnorr};
 
 use crate::{NonStandardValue, ScriptBytes, ScriptPubkey, WitnessScript, LIB_NAME_BITCOIN};
 
-#[derive(Copy, Clone, PartialEq, Eq, Debug, Hash, Default)]
+#[derive(Copy, Clone, PartialEq, Eq, Debug, Hash, Display, Default)]
 #[derive(StrictType, StrictEncode, StrictDecode)]
 #[strict_type(lib = LIB_NAME_BITCOIN, tags = repr, into_u8, try_from_u8)]
 #[cfg_attr(
  feature = "serde",
  derive(Serialize, Deserialize),
  serde(crate = "serde_crate", rename_all = "camelCase")
 )]
+#[display(uppercase)]
 #[repr(u8)]
 pub enum SighashFlag {
  /// 0x1: Sign all outputs.
@@ -184,6 +186,16 @@ impl SighashType {
  }
 }
 
+impl Display for SighashType {
+ fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+ Display::fmt(&self.flag, f)?;
+ if self.anyone_can_pay {
+ f.write_str(" | ANYONECANPAY")?;
+ }
+ Ok(())
+ }
+}
+
 #[derive(Wrapper, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash, Debug, From)]
 #[wrapper(Index, RangeOps, AsSlice, BorrowSlice, Hex, Display, FromStr)]
 #[derive(StrictType, StrictDumb, StrictEncode, StrictDecode)]