Merge pull request #2916 from sr-gi/2024-02-29-payment-preimage-hash

util: Adds Into<PaymentHash> for PaymentPreimage

Author: TheBlueMatt

lightning/src/ln/mod.rs

@@ -85,6 +85,8 @@ mod offers_tests;
 
 pub use self::peer_channel_encryptor::LN_MAX_MSG_LEN;
 
+use bitcoin::hashes::{sha256::Hash as Sha256, Hash};
+
 /// payment_hash type, use to cross-lock hop
 ///
 /// This is not exported to bindings users as we just use [u8; 32] directly
@@ -109,6 +111,13 @@ impl core::fmt::Display for PaymentPreimage {
 	}
 }
 
+/// Converts a `PaymentPreimage` into a `PaymentHash` by hashing the preimage with SHA256.
+impl Into<PaymentHash> for PaymentPreimage {
+	fn into(self) -> PaymentHash {
+		PaymentHash(Sha256::hash(&self.0).to_byte_array())
+	}
+}
+
 /// payment_secret type, use to authenticate sender to the receiver and tie MPP HTLCs together
 ///
 /// This is not exported to bindings users as we just use [u8; 32] directly