fix(app): refuse a license cache this build cannot vouch for

app/Uplink/license.tsmodified+71-5

Changes to app/Uplink/license.ts

		⋯26 linesShow the 26 lines above this hunk@@ -27,9 +27,23 @@ const KEYCHAIN_SERVICE = 'com.stacksjs.uplink'
27	27	const KEYCHAIN_ACCOUNT = 'license-key'
28	28	const CACHE_PATH = join(DATA_DIR, 'license.json')
29	29
	30	+/**
	31	+ * Stamped into the cache file, and bumped whenever `LicenseState` changes
	32	+ * shape. A file carrying any other version is refused rather than read.
	33	+ *
	34	+ * Refusing costs one request to the license server, which the launch makes
	35	+ * anyway. Reading an older shape as though it were this one is how a Mac ends
	36	+ * up entitled for two weeks on a field that used to mean something else, with
	37	+ * nothing in the file to say which build wrote it.
	38	+ */
	39	+const STATE_VERSION = 1
	40	+
	41	+export const PLANS = ['monthly', 'yearly', 'lifetime'] as const
	42	+export type Plan = typeof PLANS[number]
	43	+
30	44	export interface LicenseState {
31	45	valid: boolean
32		- plan: 'monthly' | 'yearly' | 'lifetime' | null
	46	+ plan: Plan | null
33	47	status: string
34	48	email: string | null
35	49	/** ISO time the paid period ends; null for lifetime. */
		⋯51 linesShow the 51 lines above this hunk@@ -87,7 +101,7 @@ export async function checkLicenseKey(key: string, fetcher: typeof fetch = fetch
87	101	kind: 'answered',
88	102	state: {
89	103	valid: body.valid === true,
90		- plan: body.plan ?? null,
	104	+ plan: planOf(body.plan),
91	105	status: String(body.status ?? ''),
92	106	email: body.email ?? null,
93	107	expiresAt: body.expiresAt ?? null,
		⋯66 linesShow the 66 lines above this hunk@@ -160,15 +174,67 @@ export function readLicenseState(path = CACHE_PATH): LicenseState | null {
160	174	if (!existsSync(path))
161	175	return null
162	176	try {
163		- const state = JSON.parse(readFileSync(path, 'utf8')) as LicenseState
164		- return typeof state.checkedAt === 'number' ? state : null
	177	+ return parseLicenseState(JSON.parse(readFileSync(path, 'utf8')))
165	178	}
166	179	catch {
	180	+ // Not JSON at all.
167	181	return null
168	182	}
169	183	}
170	184
	185	+/**
	186	+ * The cached answer, or null for anything this build cannot vouch for.
	187	+ *
	188	+ * Null is not a failure worth reporting: the key is in the Keychain, the
	189	+ * launch asks the server, and an online Mac never notices. A Mac that is
	190	+ * offline at the moment it upgrades is asked to connect once, which is the
	191	+ * right thing to ask and the wrong thing to guess.
	192	+ */
	193	+export function parseLicenseState(input: unknown): LicenseState | null {
	194	+ if (!input || typeof input !== 'object')
	195	+ return null
	196	+ const state = input as Record<string, unknown>
	197	+
	198	+ // 0.1.4 wrote no version and the shape has not changed since, so an
	199	+ // unstamped file is this one. Refusing those would have locked out exactly
	200	+ // the Macs this cache exists for, the ones that are not online.
	201	+ const version = state.version === undefined ? STATE_VERSION : state.version
	202	+ if (version !== STATE_VERSION)
	203	+ return null
	204	+
	205	+ // `valid` and `checkedAt` are the two that decide whether Uplink answers at
	206	+ // all, and the rest is what the menubar prints. A file that is wrong about
	207	+ // any of them was not written by this build, so none of it is evidence.
	208	+ if (typeof state.valid !== 'boolean' || typeof state.checkedAt !== 'number' || !Number.isFinite(state.checkedAt))
	209	+ return null
	210	+ if (state.plan !== null && planOf(state.plan) === null)
	211	+ return null
	212	+ if (typeof state.status !== 'string' || typeof state.endsAtPeriodEnd !== 'boolean')
	213	+ return null
	214	+ if (state.email !== null && typeof state.email !== 'string')
	215	+ return null
	216	+ if (state.expiresAt !== null && typeof state.expiresAt !== 'string')
	217	+ return null
	218	+
	219	+ return {
	220	+ valid: state.valid,
	221	+ plan: planOf(state.plan),
	222	+ status: state.status,
	223	+ email: state.email,
	224	+ expiresAt: state.expiresAt,
	225	+ endsAtPeriodEnd: state.endsAtPeriodEnd,
	226	+ checkedAt: state.checkedAt,
	227	+ }
	228	+}
	229	+
	230	+function planOf(value: unknown): Plan | null {
	231	+ return typeof value === 'string' && (PLANS as readonly string[]).includes(value) ? value as Plan : null
	232	+}
	233	+
171	234	export function writeLicenseState(state: LicenseState | null, path = CACHE_PATH): void {
172	235	mkdirSync(join(path, '..'), { recursive: true })
173		- writeFileSync(path, `${JSON.stringify(state, null, 2)}\n`, { mode: 0o600 })
	236	+ // The version leads, so the first line of the file says which build's
	237	+ // meaning the rest carries.
	238	+ const body = state === null ? null : { version: STATE_VERSION, ...state }
	239	+ writeFileSync(path, `${JSON.stringify(body, null, 2)}\n`, { mode: 0o600 })
174	240	}

tests/unit/uplink/license.test.tsmodified+87-2

Changes to tests/unit/uplink/license.test.ts

		@@ -1,6 +1,9 @@
1	1	import type { LicenseState } from '../../../app/Uplink/license'
2		-import { describe, expect, it } from 'bun:test'
3		-import { checkLicenseKey, describeLicense, isLicensed, keyFromLink, normalizeKey, OFFLINE_GRACE_MS, portalUrl } from '../../../app/Uplink/license'
	2	+import { afterEach, describe, expect, it } from 'bun:test'
	3	+import { mkdtempSync, rmSync } from 'node:fs'
	4	+import { tmpdir } from 'node:os'
	5	+import { join } from 'node:path'
	6	+import { checkLicenseKey, describeLicense, isLicensed, keyFromLink, normalizeKey, OFFLINE_GRACE_MS, parseLicenseState, portalUrl, readLicenseState, writeLicenseState } from '../../../app/Uplink/license'
4	7
5	8	const NOW = Date.parse('2026-10-01T12:00:00Z')
6	9	const KEY = 'UPLK-ABCD-EFGH-JKLM-NPQR'
		⋯61 linesShow the 61 lines above this hunk@@ -68,3 +71,85 @@ describe('activation links', () => {
68	71	expect(normalizeKey('UPLK-0000-1111-2222-3333')).toBeNull()
69	72	})
70	73	})
	74	+
	75	+const dirs: string[] = []
	76	+function tempDir(): string {
	77	+ const dir = mkdtempSync(join(tmpdir(), 'uplink-license-'))
	78	+ dirs.push(dir)
	79	+ return dir
	80	+}
	81	+afterEach(() => {
	82	+ for (const dir of dirs.splice(0))
	83	+ rmSync(dir, { recursive: true, force: true })
	84	+})
	85	+
	86	+describe('the cached answer', () => {
	87	+ it('reads back exactly what it wrote', () => {
	88	+ const path = join(tempDir(), 'license.json')
	89	+ writeLicenseState(state(), path)
	90	+ expect(readLicenseState(path)).toEqual(state())
	91	+
	92	+ writeLicenseState(state({ plan: 'lifetime', expiresAt: null, email: null }), path)
	93	+ expect(readLicenseState(path)).toEqual(state({ plan: 'lifetime', expiresAt: null, email: null }))
	94	+ })
	95	+
	96	+ /**
	97	+ * 0.1.4 shipped before the version existed, so a Mac activated then has an
	98	+ * unstamped file. Refusing it would ask exactly the wrong people, the ones
	99	+ * off-grid, to connect. The shape has not changed, so it is this version.
	100	+ */
	101	+ it('accepts the unstamped file 0.1.4 wrote', () => {
	102	+ const { version, ...unstamped } = { version: 1, ...state() }
	103	+ expect(version).toBe(1)
	104	+ expect(parseLicenseState(unstamped)).toEqual(state())
	105	+ })
	106	+
	107	+ it('refuses a version it does not understand rather than reading it', () => {
	108	+ expect(parseLicenseState({ ...state(), version: 2 })).toBeNull()
	109	+ expect(parseLicenseState({ ...state(), version: 0 })).toBeNull()
	110	+ expect(parseLicenseState({ ...state(), version: 'one' })).toBeNull()
	111	+ })
	112	+
	113	+ /**
	114	+ * The file entitles a Mac for two weeks without reaching the server, so
	115	+ * anything it is wrong about makes the whole file not evidence. Null just
	116	+ * means the launch asks the server, which it does anyway.
	117	+ */
	118	+ it('refuses a file that is wrong about any field', () => {
	119	+ expect(parseLicenseState({ ...state(), valid: 'true' })).toBeNull()
	120	+ expect(parseLicenseState({ ...state(), checkedAt: '123' })).toBeNull()
	121	+ expect(parseLicenseState({ ...state(), checkedAt: Number.NaN })).toBeNull()
	122	+ expect(parseLicenseState({ ...state(), plan: 'enterprise' })).toBeNull()
	123	+ expect(parseLicenseState({ ...state(), status: 42 })).toBeNull()
	124	+ expect(parseLicenseState({ ...state(), endsAtPeriodEnd: 'no' })).toBeNull()
	125	+ expect(parseLicenseState({ ...state(), email: 5 })).toBeNull()
	126	+ expect(parseLicenseState({ ...state(), expiresAt: 0 })).toBeNull()
	127	+ // And the shapes that are not a state at all.
	128	+ for (const body of [null, undefined, [], 'UPLK', 7, {}])
	129	+ expect(parseLicenseState(body)).toBeNull()
	130	+ })
	131	+
	132	+ it('survives a file that is missing or not JSON', () => {
	133	+ const path = join(tempDir(), 'license.json')
	134	+ expect(readLicenseState(path)).toBeNull()
	135	+ Bun.write(path, '{ not json')
	136	+ expect(readLicenseState(path)).toBeNull()
	137	+ })
	138	+
	139	+ /**
	140	+ * `checkLicenseKey` writes what the server said, so a plan name this build
	141	+ * does not know must be refused there rather than stored and refused on the
	142	+ * next read, which would cost the Mac its cache for no reason.
	143	+ */
	144	+ it('never stores a plan it would refuse to read back', async () => {
	145	+ const result = await checkLicenseKey(KEY, answering(200, { valid: true, plan: 'enterprise', status: 'active', email: null, expiresAt: null, endsAtPeriodEnd: false }), NOW)
	146	+ expect(result.kind).toBe('answered')
	147	+ if (result.kind !== 'answered')
	148	+ return
	149	+ expect(result.state.plan).toBeNull()
	150	+
	151	+ const path = join(tempDir(), 'license.json')
	152	+ writeLicenseState(result.state, path)
	153	+ expect(readLicenseState(path)).toEqual(result.state)
	154	+ })
	155	+})