From: Sergi Delgado Segura <sergi.delgado.s@gmail.com>
Date: Thu, 29 Feb 2024 19:51:38 +0000 (-0500)
Subject: util: Adds Into<PaymentHash> for PaymentPreimage
X-Git-Tag: v0.0.123-beta~52^2
X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=commitdiff_plain;h=d2ffcbc233a0c1bb67720a3a99f2363defb46c01;p=rust-lightning

util: Adds Into<PaymentHash> for PaymentPreimage

This seems like a useful interface to have for downstream users
---

diff --git a/lightning/src/ln/mod.rs b/lightning/src/ln/mod.rs
index e79f4bbd2..bf2e94caa 100644
--- a/lightning/src/ln/mod.rs
+++ b/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