Implement ToPublicKey for DescriptorKey

Author: sgeisler

src/descriptor/mod.rs

@@ -246,6 +246,25 @@ impl MiniscriptKey for DescriptorPublicKey {
     }
 }
 
+impl ToPublicKey for DescriptorPublicKey {
+    fn to_public_key(&self) -> bitcoin::PublicKey {
+        match *self {
+            DescriptorPublicKey::PukKey(ref pk) => *pk,
+            DescriptorPublicKey::XPub(ref xpub) => {
+                let ctx = secp256k1::Secp256k1::verification_only();
+                xpub.xpub
+                    .derive_pub(&ctx, &xpub.derivation_path)
+                    .expect("Shouldn't fail, only normal derivations")
+                    .public_key
+            }
+        }
+    }
+
+    fn hash_to_hash160(hash: &Self::Hash) -> hash160::Hash {
+        *hash
+    }
+}
+
 impl<Pk: MiniscriptKey> Descriptor<Pk> {
     /// Convert a descriptor using abstract keys to one using specific keys
     /// This will panic if translatefpk returns an uncompressed key when