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Support including invreqs when paying to a route
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Add a new invoice request parameter to outbound_payments and channelmanager
send-to-route internal utils. As of this commit the invreq will always be
passed in as None, to be updated in future commits.

Per <lightning/bolts#1149>, when paying a static
invoice we need to include our original invoice request in the HTLC onion since
the recipient wouldn't have received it previously.
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@valentinewallace
valentinewallace committed Oct 30, 2024
1 parent 4dc327e commit 4ed3ec6
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Showing 2 changed files with 16 additions and 14 deletions.
6 changes: 3 additions & 3 deletions lightning/src/ln/channelmanager.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -4179,14 +4179,14 @@ where
let _lck = self.total_consistency_lock.read().unwrap();
self.send_payment_along_path(SendAlongPathArgs {
path, payment_hash, recipient_onion: &recipient_onion, total_value,
cur_height, payment_id, keysend_preimage, session_priv_bytes
cur_height, payment_id, keysend_preimage, invoice_request: None, session_priv_bytes
})
}

fn send_payment_along_path(&self, args: SendAlongPathArgs) -> Result<(), APIError> {
let SendAlongPathArgs {
path, payment_hash, recipient_onion, total_value, cur_height, payment_id, keysend_preimage,
session_priv_bytes
invoice_request, session_priv_bytes
} = args;
// The top-level caller should hold the total_consistency_lock read lock.
debug_assert!(self.total_consistency_lock.try_write().is_err());
Expand All @@ -4195,7 +4195,7 @@ where

let (onion_packet, htlc_msat, htlc_cltv) = onion_utils::create_payment_onion(
&self.secp_ctx, &path, &session_priv, total_value, recipient_onion, cur_height,
payment_hash, keysend_preimage, None, prng_seed
payment_hash, keysend_preimage, invoice_request, prng_seed
).map_err(|e| {
let logger = WithContext::from(&self.logger, Some(path.hops.first().unwrap().pubkey), None, Some(*payment_hash));
log_error!(logger, "Failed to build an onion for path for payment hash {}", payment_hash);
Expand Down
24 changes: 13 additions & 11 deletions lightning/src/ln/outbound_payment.rs
View file
Original file line number Diff line number Diff line change
Expand Up @@ -716,6 +716,7 @@ pub(super) struct SendAlongPathArgs<'a> {
pub cur_height: u32,
pub payment_id: PaymentId,
pub keysend_preimage: &'a Option<PaymentPreimage>,
pub invoice_request: Option<&'a InvoiceRequest>,
pub session_priv_bytes: [u8; 32],
}

Expand Down Expand Up @@ -769,7 +770,7 @@ impl OutboundPayments {
F: Fn(SendAlongPathArgs) -> Result<(), APIError>
{
let onion_session_privs = self.add_new_pending_payment(payment_hash, recipient_onion.clone(), payment_id, None, route, None, None, entropy_source, best_block_height)?;
self.pay_route_internal(route, payment_hash, &recipient_onion, None, payment_id, None,
self.pay_route_internal(route, payment_hash, &recipient_onion, None, None, payment_id, None,
onion_session_privs, node_signer, best_block_height, &send_payment_along_path)
.map_err(|e| { self.remove_outbound_if_all_failed(payment_id, &e); e })
}
Expand Down Expand Up @@ -814,7 +815,7 @@ impl OutboundPayments {
let onion_session_privs = self.add_new_pending_payment(payment_hash, recipient_onion.clone(),
payment_id, Some(preimage), &route, None, None, entropy_source, best_block_height)?;

match self.pay_route_internal(route, payment_hash, &recipient_onion, Some(preimage),
match self.pay_route_internal(route, payment_hash, &recipient_onion, Some(preimage), None,
payment_id, None, onion_session_privs, node_signer, best_block_height, &send_payment_along_path
) {
Ok(()) => Ok(payment_hash),
Expand Down Expand Up @@ -962,7 +963,7 @@ impl OutboundPayments {
}

let result = self.pay_route_internal(
&route, payment_hash, &recipient_onion, keysend_preimage, payment_id,
&route, payment_hash, &recipient_onion, keysend_preimage, None, payment_id,
Some(route_params.final_value_msat), onion_session_privs, node_signer,
best_block_height, &send_payment_along_path
);
Expand Down Expand Up @@ -1242,7 +1243,7 @@ impl OutboundPayments {
})?;

let res = self.pay_route_internal(&route, payment_hash, &recipient_onion,
keysend_preimage, payment_id, None, onion_session_privs, node_signer,
keysend_preimage, None, payment_id, None, onion_session_privs, node_signer,
best_block_height, &send_payment_along_path);
log_info!(logger, "Sending payment with id {} and hash {} returned {:?}",
payment_id, payment_hash, res);
Expand Down Expand Up @@ -1396,7 +1397,7 @@ impl OutboundPayments {
}
};
let res = self.pay_route_internal(&route, payment_hash, &recipient_onion, keysend_preimage,
payment_id, Some(total_msat), onion_session_privs, node_signer, best_block_height,
None, payment_id, Some(total_msat), onion_session_privs, node_signer, best_block_height,
&send_payment_along_path);
log_info!(logger, "Result retrying payment id {}: {:?}", &payment_id, res);
if let Err(e) = res {
Expand Down Expand Up @@ -1508,7 +1509,8 @@ impl OutboundPayments {

let recipient_onion_fields = RecipientOnionFields::spontaneous_empty();
match self.pay_route_internal(&route, payment_hash, &recipient_onion_fields,
None, payment_id, None, onion_session_privs, node_signer, best_block_height, &send_payment_along_path
None, None, payment_id, None, onion_session_privs, node_signer, best_block_height,
&send_payment_along_path
) {
Ok(()) => Ok((payment_hash, payment_id)),
Err(e) => {
Expand Down Expand Up @@ -1620,9 +1622,9 @@ impl OutboundPayments {

fn pay_route_internal<NS: Deref, F>(
&self, route: &Route, payment_hash: PaymentHash, recipient_onion: &RecipientOnionFields,
keysend_preimage: Option<PaymentPreimage>, payment_id: PaymentId, recv_value_msat: Option<u64>,
onion_session_privs: Vec<[u8; 32]>, node_signer: &NS, best_block_height: u32,
send_payment_along_path: &F
keysend_preimage: Option<PaymentPreimage>, invoice_request: Option<&InvoiceRequest>,
payment_id: PaymentId, recv_value_msat: Option<u64>, onion_session_privs: Vec<[u8; 32]>,
node_signer: &NS, best_block_height: u32, send_payment_along_path: &F
) -> Result<(), PaymentSendFailure>
where
NS::Target: NodeSigner,
Expand Down Expand Up @@ -1675,7 +1677,7 @@ impl OutboundPayments {
for (path, session_priv_bytes) in route.paths.iter().zip(onion_session_privs.into_iter()) {
let mut path_res = send_payment_along_path(SendAlongPathArgs {
path: &path, payment_hash: &payment_hash, recipient_onion, total_value,
cur_height, payment_id, keysend_preimage: &keysend_preimage,
cur_height, payment_id, keysend_preimage: &keysend_preimage, invoice_request,
session_priv_bytes
});
match path_res {
Expand Down Expand Up @@ -1760,7 +1762,7 @@ impl OutboundPayments {
F: Fn(SendAlongPathArgs) -> Result<(), APIError>,
{
self.pay_route_internal(route, payment_hash, &recipient_onion,
keysend_preimage, payment_id, recv_value_msat, onion_session_privs,
keysend_preimage, None, payment_id, recv_value_msat, onion_session_privs,
node_signer, best_block_height, &send_payment_along_path)
.map_err(|e| { self.remove_outbound_if_all_failed(payment_id, &e); e })
}
Expand Down

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