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// The service worker's background responder, headless: request decrypt, balance,
// budgets, answered-elsewhere suppression, fallbacks. The bridge/ASP pay path
// itself is covered by the manager and bridge tests. Run: bun tools/nwc-sw-test.js
import { hex } from '@scure/base';
import * as nip04 from 'nostr-tools/nip04';
import * as nip44 from 'nostr-tools/nip44';
import { finalizeEvent, generateSecretKey, getPublicKey } from 'nostr-tools/pure';
import { respondFromBg } from '../src/nwc-respond.js';
let fails = 0;
const check = (name, ok, detail = '') => {
console.log(` ${ok ? '✓' : '✗'} ${name}${detail ? ' — ' + detail : ''}`);
if (!ok) fails++;
};
const serviceSk = generateSecretKey();
const clientSk = generateSecretKey();
const conn = {
id: 'c1', servicePk: getPublicKey(serviceSk), serviceSk: hex.encode(serviceSk),
clientPk: getPublicKey(clientSk), maxSat: 1000, dailySat: 2000,
};
const baseRec = () => ({
v: 3,
ark: { arkUrl: 'http://ark.test', esploraUrl: 'http://esp.test', network: 'mainnet', serverPubkey: 'ab'.repeat(32) },
mgr: {
v: 1, serverPubkey: 'ab'.repeat(32), nextKeyIndex: 5,
vtxos: [{ id: 'v1', bytes: '00', keyIndex: 1, amountSat: 5000, expiryHeight: 1, state: 'spendable' }],
actions: [], movements: [],
},
keys: { 1: hex.encode(generateSecretKey()), 5: hex.encode(generateSecretKey()) },
connections: [conn],
spends: [],
});
function makeReq(method, params = {}, scheme = 'nip44_v2', ageSec = 0) {
const payload = JSON.stringify({ method, params });
const content = scheme === 'nip44_v2'
? nip44.encrypt(payload, nip44.getConversationKey(clientSk, conn.servicePk))
: nip04.encrypt(clientSk, conn.servicePk, payload);
return finalizeEvent({
kind: 23194, created_at: Math.floor(Date.now() / 1000) - ageSec,
tags: [['p', conn.servicePk], ...(scheme === 'nip44_v2' ? [['encryption', 'nip44_v2']] : [])],
content,
}, clientSk);
}
function harness({ rec = baseRec(), answered = false } = {}) {
const published = [];
const fetchFn = async (url, opts) => {
if (url.includes('/publish')) {
published.push(JSON.parse(opts.body).event);
return { ok: true, json: async () => ({ ok: true }) };
}
if (url.includes('/answered')) return { ok: true, json: async () => ({ answered }) };
throw new Error('unexpected fetch ' + url);
};
const deps = {
notifier: 'http://notif.test',
fetchFn,
recordsFn: async () => [{ walletKey: 'w1', rec }],
saveFn: async () => {},
};
const decryptReply = (ev) => {
const scheme = ev.tags.find((t) => t[0] === 'encryption')?.[1];
return JSON.parse(scheme === 'nip44_v2'
? nip44.decrypt(ev.content, nip44.getConversationKey(clientSk, conn.servicePk))
: nip04.decrypt(clientSk, conn.servicePk, ev.content));
};
return { deps, published, decryptReply };
}
const ev = (e) => JSON.parse(JSON.stringify(e)); // strip verified symbol like a push payload would
console.log('[balance + info]');
{
const { deps, published, decryptReply } = harness();
const handled = await respondFromBg({ type: 'nwc', event: ev(makeReq('get_balance')) }, deps);
check('get_balance handled', handled === true);
const r = decryptReply(published[0]);
check('pouch balance in msat', r.result?.balance === 5000000, JSON.stringify(r));
}
{
const { deps, published, decryptReply } = harness();
await respondFromBg({ type: 'nwc', event: ev(makeReq('get_info', {}, 'nip04')) }, deps);
const r = decryptReply(published[0]);
check('nip04 get_info answered in nip04', r.result?.alias === 'Coinos' && published[0].tags.find((t) => t[0] === 'encryption')[1] === 'nip04');
}
console.log('\n[guards]');
{
const { deps } = harness();
const stale = ev(makeReq('get_balance', {}, 'nip44_v2', 300));
check('stale request refused', (await respondFromBg({ type: 'nwc', event: stale }, deps)) === false);
}
{
const { deps } = harness();
const foreign = ev(finalizeEvent({
kind: 23194, created_at: Math.floor(Date.now() / 1000),
tags: [['p', conn.servicePk]], content: 'junk',
}, generateSecretKey()));
check('foreign signer refused', (await respondFromBg({ type: 'nwc', event: foreign }, deps)) === false);
}
{
const { deps } = harness();
check('no payload event → wake the user', (await respondFromBg({ type: 'nwc', servicePubkey: conn.servicePk }, deps)) === false);
}
console.log('\n[pay budgets]');
// a real (long-expired) 21-sat invoice — decode only, nothing is paid
const INV21 = 'lnbc210n1p4xuk2wpp506wkjr0xk3677nu7je9c55vq4lzlkyd0ztcq2mlvumap0zpe3alqhp5ppg7g8qwpdv34hgpymhw446y37duzwcn388yp3pw05n7tlulyn2scqzysxqrrssrzjqv3dpepm8kfdxrk3sl6wzqdf49s9c0h9ljtjrek6c08r6aejlwcnur0dwyqqvusqqqqqqqlgqqqq86qqjqsp5dc0jrq94ke2f4dzx8c2dwqsc6a65eu56dt2j599l7kxp7q2hs6zq9qxpqysgqdjeft8gkl0uga24e502pvcp5vgsfap3dxuutcpgfaj33fffuqs9psmnrklshp3fg3py7vlnzsea90vj9ahqq5t9xuy67u3pk0sfnheqpn95f2g';
{
const rec = baseRec();
rec.connections = [{ ...conn, maxSat: 10 }];
const { deps, published, decryptReply } = harness({ rec });
const handled = await respondFromBg({ type: 'nwc', event: ev(makeReq('pay_invoice', { invoice: INV21 })) }, deps);
check('over per-payment limit refused', handled && decryptReply(published[0]).error?.code === 'QUOTA_EXCEEDED');
}
{
const rec = baseRec();
rec.spends = [{ connId: 'c1', amountSat: 1990, feeSat: 0, ts: Date.now() }];
const { deps, published, decryptReply } = harness({ rec });
const handled = await respondFromBg({ type: 'nwc', event: ev(makeReq('pay_invoice', { invoice: INV21 })) }, deps);
check('over daily budget refused', handled && decryptReply(published[0]).error?.code === 'QUOTA_EXCEEDED');
}
{
const { deps, published } = harness({ answered: true });
const handled = await respondFromBg({ type: 'nwc', event: ev(makeReq('pay_invoice', { invoice: INV21 })) }, deps);
check('answered elsewhere → silent', handled === true && published.length === 0);
}
{
const rec = baseRec();
rec.mgr.vtxos = []; // nothing spendable in the mirror
const { deps } = harness({ rec });
const handled = await respondFromBg({ type: 'nwc', event: ev(makeReq('pay_invoice', { invoice: INV21 })) }, deps);
check('empty mirror → wake the user', handled === false);
}
{
const rec = baseRec();
delete rec.keys['5']; // change index outside the mirrored window
const { deps } = harness({ rec });
const handled = await respondFromBg({ type: 'nwc', event: ev(makeReq('pay_invoice', { invoice: INV21 })) }, deps);
check('exhausted key window → wake the user', handled === false);
}
console.log(fails ? `\n❌ ${fails} failure(s)` : '\n✅ background responder behaves');
process.exit(fails ? 1 : 0);
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