NWC: budgets reset by the day, week or month; a revoked connection says so; a closed wallet keeps its coins renewed. Three asks from a subscription service builder (PullCap, by DM, 2026-10-16) testing a 1-sat-an-hour pull against a locked phone. (1) "For a monthly subscription a monthly cap would be tighter": a connection's budget now resets every day, week (Monday) or month, in UTC (nwc-budget.js: the window key stamps the spent counter; both the app and the worker count by it), chosen on the form, read on the card ("21,000 a month · 0 spent this month"); the worker now also counts what the APP spent this window (the counter rides the mirror) — it only ever counted its own log before, so a daily budget could be exceeded across the two; get_budget answers used/total/renews_at/renewal_period (NIP-47), in get_info's method list and the 13194 event. (2) "Does V3 reply with an NWC error when a connection is revoked, or just stop answering?" — it stopped: the open app dropped the request, the mirror forgot the key, the device even de-registered it from the push notifier, so a revocation looked exactly like a phone that is off. Now a revoked connection is kept for 30 days (revokedAt; the earlier date wins in a merge): still subscribed, still registered for pushes, still in the mirror flagged, and every request on it — from the app or the worker, in the asker's scheme — is answered UNAUTHORIZED "this connection was revoked"; no capability event for it; after the grace it is forgotten. (3) "If a user is only woken once a month by an NWC request, will V3 renew the coins on its own?" — only for one cycle: the app registers a standing order per coin, but a coin the worker SPENDS voids its order and the change had none until the app next opened, and a renewed coin sat unclaimed until then too. Now every NWC wake, after the answer and inside what is left of the push budget (tendRenewals, sw-nwc.js): claim orders whose round has run — and drive a claim left in flight on, since one takes several round trips and confirmations — then register an order for every coin without one (backstopMargin shared with the app; limited to the output keys the mirror carries; the mirror now also carries the output key a standing order or a claim in flight burned, which was below the window). Standing orders merge by unlock hash when the app returns (mergeScheduled, in mergeArkStates), so it adopts the worker's. tools/ark/bg-renewal-test.js on regtest, end to end: the worker registers from the mirror alone, a worker spend kills the order and the next wake covers the change, the round runs with nobody online and the next wake claims the renewed coin — and covers it in the same wake — then the app merges it all (fresh coin, right balance, the order adopted, not busy, one history row). tools/nwc-budget-test.js (windows, renews_at, counting with the worker's unabsorbed spends); nwc-sw-test.js (monthly budget over app+worker spends, last month's not counted, get_budget, UNAUTHORIZED in both schemes, the mirror's keys and flags, tending: claim/drive/register and their limits); nwc-test.js (monthly refusal naming the period, get_budget, a counter from last month reads as nothing, the revoked connection answered UNAUTHORIZED, no 13194, revokedAt in the snapshot, forgotten after 31 days, the earlier date wins); nwc-settings-ui-test.js (the form's period choice, the card's wording, Revoke dates it); ark-renewal-sync, sync-blob, sync-outbox and spending-restore tests pass.

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01J1Kon8bxJoHRpJdSzshCkp

1 files changed, 11 insertions, 1 deletions

diff --git a/src/nwc-bg.js b/src/nwc-bg.js
index 92786c0..3bdef08 100644
--- a/src/nwc-bg.js
+++ b/src/nwc-bg.js
@@ -88,6 +88,11 @@ export function buildBg({ ark, mgrState, keyFor, connections, offer, autowithdra
   const keys = {};
   const idx = new Set((mgrState.vtxos || []).filter((v) => v.state !== 'spent').map((v) => v.keyIndex));
   for (let i = 0; i < BG_KEY_LOOKAHEAD; i++) idx.add((mgrState.nextKeyIndex || 1) + i);
+  // A standing renewal order (and a renewal in flight) burned its output key
+  // when it was registered, below the counter by now: the worker needs that
+  // key to claim the renewed coin while the app is closed.
+  for (const e of mgrState.scheduled || []) if (e.outKeyIndex != null) idx.add(e.outKeyIndex);
+  for (const a of mgrState.actions || []) if (a.type === 'refresh' && a.step !== 'done' && a.outKeyIndex != null) idx.add(a.outKeyIndex);
   idx.add(0); // the receive-address key: mailbox/refund defaults land on it
   for (const i of idx) keys[String(i)] = keyFor(3, i);
   const keys5 = {};
@@ -107,9 +112,14 @@ export function buildBg({ ark, mgrState, keyFor, connections, offer, autowithdra
     // { on, threshold, keep, target: { kind, address, url?, spkHex? } } — the
     // destination is resolved by the app, so the worker never needs a relay
     autowithdraw: autowithdraw || null,
+    // The budget's spent counter rides along (stamped with its window) so the
+    // worker counts what the app spent; a revoked one rides along flagged, to
+    // be refused rather than ignored.
     connections: (connections || []).map((c) => ({
       id: c.id, servicePk: c.servicePk, serviceSk: c.serviceSk, clientPk: c.clientPk,
-      maxSat: c.maxSat, dailySat: c.dailySat,
+      maxSat: c.maxSat, dailySat: c.dailySat, period: c.period || 'day',
+      spentDate: c.spentDate || null, spentToday: c.spentToday || 0,
+      revoked: !!c.revoked,
     })),
   };
 }