Prefix AsyncPaymentsMessageHandler methods with handle_*

"Release" is overloaded in the trait's release_pending_messages method, since
the latter releases pending async payments onion messages to the peer manager,
vs the release_held_htlc method handles the release_held_htlc onion message by
attempting to send an HTLC to the recipient.

fuzz/src/onion_message.rs

@@ -119,7 +119,7 @@ impl OffersMessageHandler for TestOffersMessageHandler {
 struct TestAsyncPaymentsMessageHandler {}
 
 impl AsyncPaymentsMessageHandler for TestAsyncPaymentsMessageHandler {
-	fn held_htlc_available(
+	fn handle_held_htlc_available(
 		&self, _message: HeldHtlcAvailable, responder: Option<Responder>,
 	) -> Option<(ReleaseHeldHtlc, ResponseInstruction)> {
 		let responder = match responder {
@@ -128,7 +128,7 @@ impl AsyncPaymentsMessageHandler for TestAsyncPaymentsMessageHandler {
 		};
 		Some((ReleaseHeldHtlc {}, responder.respond()))
 	}
-	fn release_held_htlc(&self, _message: ReleaseHeldHtlc, _context: AsyncPaymentsContext) {}
+	fn handle_release_held_htlc(&self, _message: ReleaseHeldHtlc, _context: AsyncPaymentsContext) {}
 }
 
 #[derive(Debug)]

lightning/src/ln/channelmanager.rs

@@ -11226,13 +11226,13 @@ where
 	R::Target: Router,
 	L::Target: Logger,
 {
-	fn held_htlc_available(
+	fn handle_held_htlc_available(
 		&self, _message: HeldHtlcAvailable, _responder: Option<Responder>
 	) -> Option<(ReleaseHeldHtlc, ResponseInstruction)> {
 		None
 	}
 
-	fn release_held_htlc(&self, _message: ReleaseHeldHtlc, _context: AsyncPaymentsContext) {
+	fn handle_release_held_htlc(&self, _message: ReleaseHeldHtlc, _context: AsyncPaymentsContext) {
 		#[cfg(async_payments)] {
 			let AsyncPaymentsContext::OutboundPayment { payment_id, hmac, nonce } = _context;
 			if payment_id.verify_for_async_payment(hmac, nonce, &self.inbound_payment_key).is_err() { return }

lightning/src/ln/peer_handler.rs

@@ -147,12 +147,12 @@ impl OffersMessageHandler for IgnoringMessageHandler {
 	}
 }
 impl AsyncPaymentsMessageHandler for IgnoringMessageHandler {
-	fn held_htlc_available(
+	fn handle_held_htlc_available(
 		&self, _message: HeldHtlcAvailable, _responder: Option<Responder>,
 	) -> Option<(ReleaseHeldHtlc, ResponseInstruction)> {
 		None
 	}
-	fn release_held_htlc(&self, _message: ReleaseHeldHtlc, _context: AsyncPaymentsContext) {}
+	fn handle_release_held_htlc(&self, _message: ReleaseHeldHtlc, _context: AsyncPaymentsContext) {}
 }
 impl CustomOnionMessageHandler for IgnoringMessageHandler {
 	type CustomMessage = Infallible;

lightning/src/onion_message/async_payments.rs

@@ -27,13 +27,13 @@ const RELEASE_HELD_HTLC_TLV_TYPE: u64 = 74;
 pub trait AsyncPaymentsMessageHandler {
 	/// Handle a [`HeldHtlcAvailable`] message. A [`ReleaseHeldHtlc`] should be returned to release
 	/// the held funds.
-	fn held_htlc_available(
+	fn handle_held_htlc_available(
 		&self, message: HeldHtlcAvailable, responder: Option<Responder>,
 	) -> Option<(ReleaseHeldHtlc, ResponseInstruction)>;
 
 	/// Handle a [`ReleaseHeldHtlc`] message. If authentication of the message succeeds, an HTLC
 	/// should be released to the corresponding payee.
-	fn release_held_htlc(&self, message: ReleaseHeldHtlc, context: AsyncPaymentsContext);
+	fn handle_release_held_htlc(&self, message: ReleaseHeldHtlc, context: AsyncPaymentsContext);
 
 	/// Release any [`AsyncPaymentsMessage`]s that need to be sent.
 	///

lightning/src/onion_message/functional_tests.rs

@@ -82,12 +82,12 @@ impl OffersMessageHandler for TestOffersMessageHandler {
 struct TestAsyncPaymentsMessageHandler {}
 
 impl AsyncPaymentsMessageHandler for TestAsyncPaymentsMessageHandler {
-	fn held_htlc_available(
+	fn handle_held_htlc_available(
 		&self, _message: HeldHtlcAvailable, _responder: Option<Responder>,
 	) -> Option<(ReleaseHeldHtlc, ResponseInstruction)> {
 		None
 	}
-	fn release_held_htlc(&self, _message: ReleaseHeldHtlc, _context: AsyncPaymentsContext) {}
+	fn handle_release_held_htlc(&self, _message: ReleaseHeldHtlc, _context: AsyncPaymentsContext) {}
 }
 
 #[derive(Clone, Debug, PartialEq)]

lightning/src/onion_message/messenger.rs

@@ -1603,7 +1603,7 @@ where
 					},
 					#[cfg(async_payments)]
 					ParsedOnionMessageContents::AsyncPayments(AsyncPaymentsMessage::HeldHtlcAvailable(msg)) => {
-						let response_instructions = self.async_payments_handler.held_htlc_available(
+						let response_instructions = self.async_payments_handler.handle_held_htlc_available(
 							msg, responder
 						);
 						if let Some((msg, instructions)) = response_instructions {
@@ -1620,7 +1620,7 @@ where
 							},
 							None => return,
 						};
-						self.async_payments_handler.release_held_htlc(msg, context);
+						self.async_payments_handler.handle_release_held_htlc(msg, context);
 					},
 					ParsedOnionMessageContents::Custom(msg) => {
 						let context = match context {