Merge rust-bitcoin#5379: feat: Address::p2a

8142980 feat: Address::p2a (Christian Lewe)

Pull request description:

  There is a method to check if an address is P2A, but there is no method to create a P2A address. This PR adds the P2A constructor.


ACKs for top commit:
  apoelstra:
    ACK 8142980; successfully ran local tests
  tcharding:
    ACK 8142980


Tree-SHA512: 6e43647de5df5a6d0b27ca50319633c5fc97563c6e787cf307fc9c42c836f80ab614b60c8b927b4a52abe81ca9f254faaef04249fb1e34067ada5b5a29d626c8

Author: apoelstra

bitcoin/src/address/mod.rs

@@ -590,6 +590,11 @@ impl Address {
         Self::from_witness_program(program, hrp)
     }
 
+    /// Constructs a new pay-to-anchor (P2A) [`Address`].
+    pub fn p2a(hrp: impl Into<KnownHrp>) -> Self {
+        Self::from_witness_program(WitnessProgram::p2a(), hrp)
+    }
+
     /// Constructs a new [`Address`] from an arbitrary [`WitnessProgram`].
     ///
     /// This only exists to support future witness versions. If you are doing normal mainnet things