bolt12 zaps: pay offers, NWC pay/receive, per-user offers, NIP-44

- sendLightning fetches an invoice from lno1 offers (payer_note passthrough
  for NIP-177 zap intents) and pays it through the existing bolt12 path
- NWC: new nwc#2 pay/receive methods (BIP-321 URIs, payer proofs stubbed
  until CLN 26.06 createproof), nip44_v2 alongside nip04 with per-request
  scheme detection, dual 23196/23197 notifications, 13194 refreshed when
  its content or encryption tag goes stale
- standing per-user bolt12 offer via GET /offer; incoming bolt12 payments
  record invreq_payer_note as memo
- parse/fetchinvoice routes handle offers; zap display parses kind 9736
  receipts (amount tag + embedded intent) and drops a call to a sync()
  helper that never existed

Co-Authored-By: Claude Fable 5 <[email protected]>

1 files changed, 6 insertions, 2 deletions

diff --git a/lib/lightning.ts b/lib/lightning.ts
index 1c768981..8935f2ce 100644
--- a/lib/lightning.ts
+++ b/lib/lightning.ts
@@ -46,6 +46,7 @@ export async function listenForLightning() {
       bolt11,
       bolt12,
       description,
+      invreq_payer_note,
       pay_index,
       payment_hash,
       amount_received_msat,
@@ -97,7 +98,9 @@ export async function listenForLightning() {
       await credit({
         hash: bolt11 || bolt12,
         amount: received,
-        memo: invoice.memo,
+        // A bolt12 payer note (e.g. nostr:nip177:<zap-intent-id>) identifies
+        // this specific payment; the offer's own memo is just its static label
+        memo: invreq_payer_note || invoice.memo,
         ref: preimage,
         type: bolt12 ? PaymentType.bolt12 : PaymentType.lightning,
         payment_hash,
@@ -206,6 +209,7 @@ export async function replay(index) {
     bolt11,
     bolt12,
     description,
+    invreq_payer_note,
     amount_received_msat,
     payment_preimage: preimage,
     paid_at,
@@ -237,7 +241,7 @@ export async function replay(index) {
     p = await credit({
       hash: bolt11 || bolt12,
       amount: received,
-      memo: invoice.memo,
+      memo: invreq_payer_note || invoice.memo,
       ref: preimage,
       type: bolt12 ? PaymentType.bolt12 : PaymentType.lightning,
       created: paid_at ? paid_at * 1000 : undefined,