From 8e562be5d43dce5a07fc09686d4f7f151f5a2706 Mon Sep 17 00:00:00 2001 From: Jeffrey Czyz Date: Fri, 26 Apr 2024 11:37:24 -0500 Subject: [PATCH] Remove PaymentContext from OnionPayload PaymentContext is already stored in ClaimablePayment via PaymentPurpose, so there is no need to repeat it in each ClaimableHTLC via OnionPayload. This avoids cloning the PaymentContext each time an HTLC is received, other than for the first HTLC for a payment. --- lightning/src/ln/channelmanager.rs | 44 ++++++++++++------------------ 1 file changed, 17 insertions(+), 27 deletions(-) diff --git a/lightning/src/ln/channelmanager.rs b/lightning/src/ln/channelmanager.rs index 06627ff6..7244d258 100644 --- a/lightning/src/ln/channelmanager.rs +++ b/lightning/src/ln/channelmanager.rs @@ -357,11 +357,6 @@ enum OnionPayload { /// This is only here for backwards-compatibility in serialization, in the future it can be /// removed, breaking clients running 0.0.106 and earlier. _legacy_hop_data: Option, - /// The context of the payment included by the recipient in a blinded path, or `None` if a - /// blinded path was not used. - /// - /// Used in part to determine the [`events::PaymentPurpose`]. - payment_context: Option, }, /// Contains the payer-provided preimage. Spontaneous(PaymentPreimage), @@ -5346,7 +5341,7 @@ where } }) => { let blinded_failure = routing.blinded_failure(); - let (cltv_expiry, onion_payload, payment_data, phantom_shared_secret, mut onion_fields) = match routing { + let (cltv_expiry, onion_payload, payment_data, payment_context, phantom_shared_secret, mut onion_fields) = match routing { PendingHTLCRouting::Receive { payment_data, payment_metadata, payment_context, incoming_cltv_expiry, phantom_shared_secret, custom_tlvs, @@ -5355,8 +5350,8 @@ where let _legacy_hop_data = Some(payment_data.clone()); let onion_fields = RecipientOnionFields { payment_secret: Some(payment_data.payment_secret), payment_metadata, custom_tlvs }; - (incoming_cltv_expiry, OnionPayload::Invoice { _legacy_hop_data, payment_context }, - Some(payment_data), phantom_shared_secret, onion_fields) + (incoming_cltv_expiry, OnionPayload::Invoice { _legacy_hop_data }, + Some(payment_data), payment_context, phantom_shared_secret, onion_fields) }, PendingHTLCRouting::ReceiveKeysend { payment_data, payment_preimage, payment_metadata, @@ -5368,7 +5363,7 @@ where custom_tlvs, }; (incoming_cltv_expiry, OnionPayload::Spontaneous(payment_preimage), - payment_data, None, onion_fields) + payment_data, None, None, onion_fields) }, _ => { panic!("short_channel_id == 0 should imply any pending_forward entries are of type Receive"); @@ -5530,7 +5525,7 @@ where match payment_secrets.entry(payment_hash) { hash_map::Entry::Vacant(_) => { match claimable_htlc.onion_payload { - OnionPayload::Invoice { ref payment_context, .. } => { + OnionPayload::Invoice { .. } => { let payment_data = payment_data.unwrap(); let (payment_preimage, min_final_cltv_expiry_delta) = match inbound_payment::verify(payment_hash, &payment_data, self.highest_seen_timestamp.load(Ordering::Acquire) as u64, &self.inbound_payment_key, &self.logger) { Ok(result) => result, @@ -5550,7 +5545,7 @@ where let purpose = events::PaymentPurpose::from_parts( payment_preimage, payment_data.payment_secret, - payment_context.clone(), + payment_context, ); check_total_value!(purpose); }, @@ -5561,13 +5556,10 @@ where } }, hash_map::Entry::Occupied(inbound_payment) => { - let payment_context = match claimable_htlc.onion_payload { - OnionPayload::Spontaneous(_) => { - log_trace!(self.logger, "Failing new keysend HTLC with payment_hash {} because we already have an inbound payment with the same payment hash", &payment_hash); - fail_htlc!(claimable_htlc, payment_hash); - }, - OnionPayload::Invoice { ref payment_context, .. } => payment_context, - }; + if let OnionPayload::Spontaneous(_) = claimable_htlc.onion_payload { + log_trace!(self.logger, "Failing new keysend HTLC with payment_hash {} because we already have an inbound payment with the same payment hash", &payment_hash); + fail_htlc!(claimable_htlc, payment_hash); + } let payment_data = payment_data.unwrap(); if inbound_payment.get().payment_secret != payment_data.payment_secret { log_trace!(self.logger, "Failing new HTLC with payment_hash {} as it didn't match our expected payment secret.", &payment_hash); @@ -5580,7 +5572,7 @@ where let purpose = events::PaymentPurpose::from_parts( inbound_payment.get().payment_preimage, payment_data.payment_secret, - payment_context.clone(), + payment_context, ); let payment_claimable_generated = check_total_value!(purpose); if payment_claimable_generated { @@ -10815,11 +10807,11 @@ impl_writeable_tlv_based!(HTLCPreviousHopData, { impl Writeable for ClaimableHTLC { fn write(&self, writer: &mut W) -> Result<(), io::Error> { - let (payment_data, keysend_preimage, payment_context) = match &self.onion_payload { - OnionPayload::Invoice { _legacy_hop_data, payment_context } => { - (_legacy_hop_data.as_ref(), None, payment_context.as_ref()) + let (payment_data, keysend_preimage) = match &self.onion_payload { + OnionPayload::Invoice { _legacy_hop_data } => { + (_legacy_hop_data.as_ref(), None) }, - OnionPayload::Spontaneous(preimage) => (None, Some(preimage), None), + OnionPayload::Spontaneous(preimage) => (None, Some(preimage)), }; write_tlv_fields!(writer, { (0, self.prev_hop, required), @@ -10831,7 +10823,6 @@ impl Writeable for ClaimableHTLC { (6, self.cltv_expiry, required), (8, keysend_preimage, option), (10, self.counterparty_skimmed_fee_msat, option), - (11, payment_context, option), }); Ok(()) } @@ -10849,7 +10840,6 @@ impl Readable for ClaimableHTLC { (6, cltv_expiry, required), (8, keysend_preimage, option), (10, counterparty_skimmed_fee_msat, option), - (11, payment_context, option), }); let payment_data: Option = payment_data_opt; let value = value_ser.0.unwrap(); @@ -10870,7 +10860,7 @@ impl Readable for ClaimableHTLC { } total_msat = Some(payment_data.as_ref().unwrap().total_msat); } - OnionPayload::Invoice { _legacy_hop_data: payment_data, payment_context } + OnionPayload::Invoice { _legacy_hop_data: payment_data } }, }; Ok(Self { @@ -12106,7 +12096,7 @@ where return Err(DecodeError::InvalidValue); } let purpose = match &htlcs[0].onion_payload { - OnionPayload::Invoice { _legacy_hop_data, payment_context: _ } => { + OnionPayload::Invoice { _legacy_hop_data } => { if let Some(hop_data) = _legacy_hop_data { events::PaymentPurpose::Bolt11InvoicePayment { payment_preimage: match pending_inbound_payments.get(&payment_hash) { -- 2.30.2