Point of sale: a bill, an optional tip prompt, one invoice, and a ledger that keeps tips apart.

A new deferred feature (src/features/pos.js): type the amount in the display
unit, optionally a note, Charge. With the tip prompt on, the customer sees
the bill and picks a percentage (configurable, default 10/15/20), their own
figure, or no tip; one Lightning invoice is made for the total through the
Ark feature's receive (new hooks arkLnInvoice/arkLnWatch/arkLnUnwatch/
arkLnCancel wrap createLnInvoice and pollArkLn). Paid, expired and cancelled
sales are recorded with the bill and the tip as separate figures, and the
fiat rate at the time; the amount screen shows today's bills, tips and total.

Doors: Settings → Payments card, and a button under the payment address on
Receive (a receiveExtras hook the names pane renders).

Co-Authored-By: Claude Fable 5.1 <[email protected]>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/features/ark.js b/src/features/ark.js
index 5327a23..ef5d8fc 100644
--- a/src/features/ark.js
+++ b/src/features/ark.js
@@ -3238,6 +3238,16 @@ export function arkFeature(ctx) {
     },
     arkSpendableSat() { const b = arkBalance(); return b ? b.spendableSat : 0; },
     arkReady() { return arkAvailable(); },
+    // A Lightning invoice for another feature to watch (point of sale):
+    // the action id is the handle, the poller tells it when it settles.
+    async arkLnInvoice(amountSat, description) {
+      const mgr = await connectArk();
+      const a = await mgr.createLnInvoice(amountSat, description);
+      return { id: a.id, invoice: a.invoice, paymentHash: a.paymentHash, amountSat, expiresAt: a.expiresAt };
+    },
+    arkLnWatch(id, onSettle) { pollArkLn(id, onSettle); return true; },
+    arkLnUnwatch(id) { stopArkLnPoll(id); return true; },
+    async arkLnCancel(id) { const mgr = await connectArk(); await mgr.cancelLnInvoice(id); return true; },
     async arkMakeInvoice(amountSat, description) {
       const mgr = await connectArk();
       const a = await mgr.createLnInvoice(amountSat, description);