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plugins/offers: handle invreq_paths in invoice_requests, set them if necessary.

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Changelog-EXPERIMENTAL: offers: `invoicerequest` will set a blinded path if we're an unannounced node.
Changelog-EXPERIMENTAL: offers: `sendinvoice` will use a blinded path in an invoice_request, if specified.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2024-08-01 09:34:04 +09:30
parent 71270ae795
commit f2a7b19281
14 changed files with 1191 additions and 616 deletions
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6
plugins/fetchinvoice.c
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@@ -564,7 +564,7 @@ static struct command_result *try_establish(struct command *cmd,
* - otherwise, if `offer_paths` is present (invoice_request for an offer without id):
* - MUST reject the invoice if `invoice_node_id` is not equal to the final `blinded_node_id` it sent the `invoice_request` to.
*/
if (!epaths->sent->offer->offer_issuer_id)
if (epaths->sent->offer && !epaths->sent->offer->offer_issuer_id)
epaths->sent->issuer_key = &bpath->path[tal_count(bpath->path)-1]->blinded_node_id;
}
@@ -1107,10 +1107,10 @@ static struct command_result *createinvoice_done(struct command *cmd,
/* BOLT-offers #12:
* - if it sends an invoice in response:
* - MUST use `offer_paths` if present, otherwise MUST use
* - MUST use `invreq_paths` if present, otherwise MUST use
* `invreq_payer_id` as the node id to send to.
*/
sent->their_paths = sent->invreq->offer_paths;
sent->their_paths = sent->invreq->invreq_paths;
if (sent->their_paths)
sent->direct_dest = NULL;
else