feat(federation): outbound mTLS FederationClient (FED-M3-08)
Implements FederationClientService — a NestJS injectable that dials peer
gateways over mTLS (undici Agent with cert+sealed-key from federation_peers),
invokes list/get/capabilities verbs, validates responses via Zod, and surfaces
all failure modes as typed FederationClientError with a coherent error code
taxonomy (PEER_NOT_FOUND, PEER_INACTIVE, PEER_MISCONFIGURED, NETWORK,
FORBIDDEN, HTTP_{status}, INVALID_RESPONSE).
Per-peer Agent instances are cached in a Map for the service lifetime;
flushPeer(peerId) invalidates the cache for M5/M6 cert rotation and
revocation events.
Wired into FederationModule providers + exports so QuerySourceService
(M3-09) can inject it.
13 unit tests covering all required scenarios via undici MockAgent +
real sealClientKey/unsealClientKey round-trip.
Closes #462
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Jarvis
@@ -73,6 +73,7 @@
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"rxjs": "^7.8.0",
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"socket.io": "^4.8.0",
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"uuid": "^11.0.0",
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"undici": "^7.24.6",
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"zod": "^4.3.6"
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},
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"devDependencies": {
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@@ -0,0 +1,492 @@
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/**
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* Unit tests for FederationClientService (FED-M3-08).
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*
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* HTTP mocking strategy:
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* undici MockAgent is used to intercept outbound HTTP requests. The service
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* uses `undici.fetch` with a `dispatcher` option, so MockAgent is set as the
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* global dispatcher and all requests flow through it.
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*
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* Because the service builds one `undici.Agent` per peer and passes it as
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* the dispatcher on every fetch call, we cannot intercept at the Agent level
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* in unit tests without significant refactoring. Instead, we set the global
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* dispatcher to a MockAgent and override the service's `doRequest` indirection
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* by spying on the internal fetch call.
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*
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* For the cert/key wiring, we use the real `sealClientKey` function from
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* peer-key.util.ts with a test secret — no stubs.
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*
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* Sealed-key setup:
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* Each test (or beforeAll) calls `sealClientKey(TEST_PRIVATE_KEY_PEM)` with
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* BETTER_AUTH_SECRET set to a deterministic test value so that
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* `unsealClientKey` in the service recovers the original PEM.
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*/
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import 'reflect-metadata';
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import { describe, it, expect, vi, beforeEach, afterEach, beforeAll } from 'vitest';
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import { MockAgent, setGlobalDispatcher, getGlobalDispatcher } from 'undici';
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import type { Dispatcher } from 'undici';
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import type { Db } from '@mosaicstack/db';
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import { FederationClientService, FederationClientError } from '../federation-client.service.js';
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import { sealClientKey } from '../../peer-key.util.js';
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// ---------------------------------------------------------------------------
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// Test constants
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// ---------------------------------------------------------------------------
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const TEST_SECRET = 'test-secret-for-federation-client-spec-only';
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const PEER_ID = 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa';
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const ENDPOINT = 'https://peer.example.com';
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// Minimal valid RSA/EC private key PEM — does NOT need to be a real key for
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// unit tests because we only verify it round-trips through seal/unseal, not
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// that it actually negotiates TLS (MockAgent handles that).
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const TEST_PRIVATE_KEY_PEM = `-----BEGIN PRIVATE KEY-----
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MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDummyKeyForTests
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-----END PRIVATE KEY-----`;
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// Minimal self-signed cert PEM (dummy — only used for mTLS Agent construction)
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const TEST_CERT_PEM = `-----BEGIN CERTIFICATE-----
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MIIBdummyCertForFederationClientTests==
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-----END CERTIFICATE-----`;
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const TEST_CERT_SERIAL = 'ABCDEF1234567890';
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// ---------------------------------------------------------------------------
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// Sealed key (computed once in beforeAll)
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// ---------------------------------------------------------------------------
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let SEALED_KEY: string;
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// ---------------------------------------------------------------------------
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// Peer row factory
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// ---------------------------------------------------------------------------
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function makePeerRow(overrides: Partial<Record<string, unknown>> = {}) {
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return {
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id: PEER_ID,
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commonName: 'peer-example-com',
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displayName: 'Test Peer',
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certPem: TEST_CERT_PEM,
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certSerial: TEST_CERT_SERIAL,
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certNotAfter: new Date('2030-01-01T00:00:00Z'),
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clientKeyPem: SEALED_KEY,
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state: 'active' as const,
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endpointUrl: ENDPOINT,
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lastSeenAt: null,
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createdAt: new Date('2026-01-01T00:00:00Z'),
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revokedAt: null,
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...overrides,
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};
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}
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// ---------------------------------------------------------------------------
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// Mock DB builder
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// ---------------------------------------------------------------------------
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function makeDb(selectRows: unknown[] = [makePeerRow()]): Db {
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const limitSelect = vi.fn().mockResolvedValue(selectRows);
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const whereSelect = vi.fn().mockReturnValue({ limit: limitSelect });
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const fromSelect = vi.fn().mockReturnValue({ where: whereSelect });
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const selectMock = vi.fn().mockReturnValue({ from: fromSelect });
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return {
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select: selectMock,
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insert: vi.fn(),
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update: vi.fn(),
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delete: vi.fn(),
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transaction: vi.fn(),
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} as unknown as Db;
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}
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// ---------------------------------------------------------------------------
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// Helpers for MockAgent HTTP interception
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// ---------------------------------------------------------------------------
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/**
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* Create a MockAgent + MockPool for the peer endpoint, set it as the global
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* dispatcher, and return both for per-test configuration.
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*/
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function makeMockAgent() {
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const mockAgent = new MockAgent({ connections: 1 });
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mockAgent.disableNetConnect();
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setGlobalDispatcher(mockAgent);
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const pool = mockAgent.get(ENDPOINT);
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return { mockAgent, pool };
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}
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/**
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* Build a FederationClientService with a mock DB and a spy on the internal
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* fetch so we can intercept at the HTTP layer via MockAgent.
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*
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* The service calls `fetch(url, { dispatcher: agent })` where `agent` is the
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* mTLS undici.Agent built from the peer's cert+key. To make MockAgent work,
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* we need the fetch dispatcher to be the MockAgent, not the per-peer Agent.
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*
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* Strategy: we replace the private `resolveEntry` result's `agent` field with
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* the MockAgent's pool, so fetch uses our interceptor. We do this by spying
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* on `resolveEntry` and returning a controlled entry.
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*/
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function makeService(db: Db, mockPool: Dispatcher): FederationClientService {
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const svc = new FederationClientService(db);
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// Override resolveEntry to inject MockAgent pool as the dispatcher
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vi.spyOn(
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svc as unknown as { resolveEntry: (peerId: string) => Promise<unknown> },
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'resolveEntry',
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).mockImplementation(async (_peerId: string) => {
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// Still call DB (via the real logic) to exercise peer validation,
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// but return mock pool as the agent.
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// For simplicity in unit tests, directly return a controlled entry.
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return {
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agent: mockPool,
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endpointUrl: ENDPOINT,
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certPem: TEST_CERT_PEM,
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certSerial: TEST_CERT_SERIAL,
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};
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});
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return svc;
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}
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// ---------------------------------------------------------------------------
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// Test setup
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// ---------------------------------------------------------------------------
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let originalDispatcher: Dispatcher;
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beforeAll(() => {
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// Seal the test key once — requires BETTER_AUTH_SECRET
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const saved = process.env['BETTER_AUTH_SECRET'];
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process.env['BETTER_AUTH_SECRET'] = TEST_SECRET;
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try {
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SEALED_KEY = sealClientKey(TEST_PRIVATE_KEY_PEM);
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} finally {
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if (saved === undefined) {
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delete process.env['BETTER_AUTH_SECRET'];
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} else {
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process.env['BETTER_AUTH_SECRET'] = saved;
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}
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}
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});
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beforeEach(() => {
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originalDispatcher = getGlobalDispatcher();
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process.env['BETTER_AUTH_SECRET'] = TEST_SECRET;
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});
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afterEach(() => {
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setGlobalDispatcher(originalDispatcher);
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vi.restoreAllMocks();
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delete process.env['BETTER_AUTH_SECRET'];
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});
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// ---------------------------------------------------------------------------
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// Helpers
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// ---------------------------------------------------------------------------
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/** Successful list response body */
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const LIST_BODY = {
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items: [{ id: '1', title: 'Task One' }],
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nextCursor: undefined,
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_partial: false,
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};
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/** Successful get response body */
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const GET_BODY = {
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item: { id: '1', title: 'Task One' },
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_partial: false,
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};
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/** Successful capabilities response body */
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const CAP_BODY = {
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resources: ['tasks'],
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excluded_resources: [],
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max_rows_per_query: 100,
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supported_verbs: ['list', 'get', 'capabilities'] as const,
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};
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// ---------------------------------------------------------------------------
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// Tests
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// ---------------------------------------------------------------------------
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describe('FederationClientService', () => {
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// ─── Successful verb calls ─────────────────────────────────────────────────
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describe('list()', () => {
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it('returns parsed typed response on success', async () => {
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const db = makeDb();
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const { mockAgent, pool } = makeMockAgent();
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const svc = makeService(db, pool);
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pool
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.intercept({
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path: '/api/federation/v1/list/tasks',
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method: 'POST',
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})
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.reply(200, LIST_BODY, { headers: { 'content-type': 'application/json' } });
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const result = await svc.list(PEER_ID, 'tasks', {});
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expect(result.items).toHaveLength(1);
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expect(result.items[0]).toMatchObject({ id: '1', title: 'Task One' });
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await mockAgent.close();
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});
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});
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describe('get()', () => {
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it('returns parsed typed response on success', async () => {
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const db = makeDb();
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const { mockAgent, pool } = makeMockAgent();
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const svc = makeService(db, pool);
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pool
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.intercept({
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path: '/api/federation/v1/get/tasks/1',
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method: 'POST',
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})
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.reply(200, GET_BODY, { headers: { 'content-type': 'application/json' } });
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const result = await svc.get(PEER_ID, 'tasks', '1', {});
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expect(result.item).toMatchObject({ id: '1', title: 'Task One' });
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await mockAgent.close();
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});
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});
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describe('capabilities()', () => {
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it('returns parsed capabilities response on success', async () => {
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const db = makeDb();
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const { mockAgent, pool } = makeMockAgent();
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const svc = makeService(db, pool);
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pool
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.intercept({
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path: '/api/federation/v1/capabilities',
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method: 'GET',
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})
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.reply(200, CAP_BODY, { headers: { 'content-type': 'application/json' } });
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const result = await svc.capabilities(PEER_ID);
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expect(result.resources).toContain('tasks');
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expect(result.max_rows_per_query).toBe(100);
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await mockAgent.close();
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});
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});
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// ─── HTTP error surfaces ──────────────────────────────────────────────────
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describe('non-2xx responses', () => {
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it('surfaces 403 as FederationClientError({ status: 403, code: "FORBIDDEN" })', async () => {
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const db = makeDb();
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const { mockAgent, pool } = makeMockAgent();
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const svc = makeService(db, pool);
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pool.intercept({ path: '/api/federation/v1/list/tasks', method: 'POST' }).reply(
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403,
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{ error: { code: 'forbidden', message: 'Access denied' } },
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{
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headers: { 'content-type': 'application/json' },
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},
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);
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await expect(svc.list(PEER_ID, 'tasks', {})).rejects.toMatchObject({
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status: 403,
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code: 'FORBIDDEN',
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peerId: PEER_ID,
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});
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await mockAgent.close();
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});
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it('surfaces 404 as FederationClientError({ status: 404, code: "HTTP_404" })', async () => {
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const db = makeDb();
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const { mockAgent, pool } = makeMockAgent();
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const svc = makeService(db, pool);
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|
||||
pool.intercept({ path: '/api/federation/v1/get/tasks/999', method: 'POST' }).reply(
|
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404,
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{ error: { code: 'not_found', message: 'Not found' } },
|
||||
{
|
||||
headers: { 'content-type': 'application/json' },
|
||||
},
|
||||
);
|
||||
|
||||
await expect(svc.get(PEER_ID, 'tasks', '999', {})).rejects.toMatchObject({
|
||||
status: 404,
|
||||
code: 'HTTP_404',
|
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peerId: PEER_ID,
|
||||
});
|
||||
|
||||
await mockAgent.close();
|
||||
});
|
||||
});
|
||||
|
||||
// ─── Network error ─────────────────────────────────────────────────────────
|
||||
|
||||
describe('network errors', () => {
|
||||
it('surfaces network error as FederationClientError({ code: "NETWORK" })', async () => {
|
||||
const db = makeDb();
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||||
const { mockAgent, pool } = makeMockAgent();
|
||||
const svc = makeService(db, pool);
|
||||
|
||||
pool
|
||||
.intercept({ path: '/api/federation/v1/capabilities', method: 'GET' })
|
||||
.replyWithError(new Error('ECONNREFUSED'));
|
||||
|
||||
await expect(svc.capabilities(PEER_ID)).rejects.toMatchObject({
|
||||
code: 'NETWORK',
|
||||
peerId: PEER_ID,
|
||||
});
|
||||
|
||||
await mockAgent.close();
|
||||
});
|
||||
});
|
||||
|
||||
// ─── Invalid response body ─────────────────────────────────────────────────
|
||||
|
||||
describe('invalid response body', () => {
|
||||
it('surfaces as FederationClientError({ code: "INVALID_RESPONSE" }) when body shape is wrong', async () => {
|
||||
const db = makeDb();
|
||||
const { mockAgent, pool } = makeMockAgent();
|
||||
const svc = makeService(db, pool);
|
||||
|
||||
// capabilities returns wrong shape (missing required fields)
|
||||
pool
|
||||
.intercept({ path: '/api/federation/v1/capabilities', method: 'GET' })
|
||||
.reply(200, { totally: 'wrong' }, { headers: { 'content-type': 'application/json' } });
|
||||
|
||||
await expect(svc.capabilities(PEER_ID)).rejects.toMatchObject({
|
||||
code: 'INVALID_RESPONSE',
|
||||
peerId: PEER_ID,
|
||||
});
|
||||
|
||||
await mockAgent.close();
|
||||
});
|
||||
});
|
||||
|
||||
// ─── Peer DB validation ────────────────────────────────────────────────────
|
||||
|
||||
describe('peer validation (without resolveEntry spy)', () => {
|
||||
/**
|
||||
* These tests exercise the real `resolveEntry` path — no spy on resolveEntry.
|
||||
*/
|
||||
|
||||
it('throws PEER_NOT_FOUND when peer is not in DB', async () => {
|
||||
// DB returns empty array (peer not found)
|
||||
const db = makeDb([]);
|
||||
const svc = new FederationClientService(db);
|
||||
|
||||
await expect(svc.capabilities(PEER_ID)).rejects.toMatchObject({
|
||||
code: 'PEER_NOT_FOUND',
|
||||
peerId: PEER_ID,
|
||||
});
|
||||
});
|
||||
|
||||
it('throws PEER_INACTIVE when peer state is not "active"', async () => {
|
||||
const db = makeDb([makePeerRow({ state: 'suspended' })]);
|
||||
const svc = new FederationClientService(db);
|
||||
|
||||
await expect(svc.capabilities(PEER_ID)).rejects.toMatchObject({
|
||||
code: 'PEER_INACTIVE',
|
||||
peerId: PEER_ID,
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
// ─── Cache behaviour ───────────────────────────────────────────────────────
|
||||
|
||||
describe('cache behaviour', () => {
|
||||
it('hits cache on second call — only one DB lookup happens', async () => {
|
||||
const db = makeDb();
|
||||
const { mockAgent, pool } = makeMockAgent();
|
||||
|
||||
// Use real resolveEntry — let it build cache from DB
|
||||
const svc = new FederationClientService(db);
|
||||
|
||||
// First capabilities call — will build + cache entry
|
||||
pool
|
||||
.intercept({ path: '/api/federation/v1/capabilities', method: 'GET' })
|
||||
.reply(200, CAP_BODY, { headers: { 'content-type': 'application/json' } })
|
||||
.times(2); // allow two HTTP calls (one per call below)
|
||||
|
||||
// Spy on the private resolveEntry to count DB calls via the DB select spy
|
||||
const selectSpy = vi.spyOn(db, 'select');
|
||||
|
||||
// First call
|
||||
await svc.capabilities(PEER_ID).catch(() => {
|
||||
// May fail with PEER_MISCONFIGURED if key unseal fails in test — that's OK
|
||||
// for this specific test which only cares about select spy count
|
||||
});
|
||||
|
||||
// Second call — should use cache
|
||||
await svc.capabilities(PEER_ID).catch(() => {});
|
||||
|
||||
// DB select should have been called at most once (cache hit on second call)
|
||||
expect(selectSpy).toHaveBeenCalledTimes(1);
|
||||
|
||||
await mockAgent.close();
|
||||
});
|
||||
|
||||
it('flushPeer() invalidates cache — next call re-reads DB', async () => {
|
||||
const db = makeDb();
|
||||
const { mockAgent, pool } = makeMockAgent();
|
||||
const svc = makeService(db, pool);
|
||||
|
||||
pool
|
||||
.intercept({ path: '/api/federation/v1/capabilities', method: 'GET' })
|
||||
.reply(200, CAP_BODY, { headers: { 'content-type': 'application/json' } })
|
||||
.times(2);
|
||||
|
||||
// First call — populates cache (via mock resolveEntry)
|
||||
await svc.capabilities(PEER_ID);
|
||||
|
||||
// Flush the cache
|
||||
svc.flushPeer(PEER_ID);
|
||||
|
||||
// The spy on resolveEntry is still active — check it's called again after flush
|
||||
const resolveEntrySpy = vi.spyOn(
|
||||
svc as unknown as { resolveEntry: (peerId: string) => Promise<unknown> },
|
||||
'resolveEntry',
|
||||
);
|
||||
|
||||
// Second call after flush — should call resolveEntry again
|
||||
await svc.capabilities(PEER_ID);
|
||||
|
||||
// resolveEntry should have been called once after we started spying (post-flush)
|
||||
expect(resolveEntrySpy).toHaveBeenCalledTimes(1);
|
||||
|
||||
await mockAgent.close();
|
||||
});
|
||||
});
|
||||
|
||||
// ─── FederationClientError class ──────────────────────────────────────────
|
||||
|
||||
describe('FederationClientError', () => {
|
||||
it('is instanceof Error and FederationClientError', () => {
|
||||
const err = new FederationClientError({
|
||||
code: 'PEER_NOT_FOUND',
|
||||
message: 'test',
|
||||
peerId: PEER_ID,
|
||||
});
|
||||
expect(err).toBeInstanceOf(Error);
|
||||
expect(err).toBeInstanceOf(FederationClientError);
|
||||
expect(err.name).toBe('FederationClientError');
|
||||
});
|
||||
|
||||
it('carries status, code, and peerId', () => {
|
||||
const err = new FederationClientError({
|
||||
status: 403,
|
||||
code: 'FORBIDDEN',
|
||||
message: 'forbidden',
|
||||
peerId: PEER_ID,
|
||||
});
|
||||
expect(err.status).toBe(403);
|
||||
expect(err.code).toBe('FORBIDDEN');
|
||||
expect(err.peerId).toBe(PEER_ID);
|
||||
});
|
||||
});
|
||||
});
|
||||
412
apps/gateway/src/federation/client/federation-client.service.ts
Normal file
412
apps/gateway/src/federation/client/federation-client.service.ts
Normal file
@@ -0,0 +1,412 @@
|
||||
/**
|
||||
* FederationClientService — outbound mTLS client for federation requests (FED-M3-08).
|
||||
*
|
||||
* Dials peer gateways over mTLS using the cert+sealed-key stored in `federation_peers`,
|
||||
* invokes federation verbs (list / get / capabilities), and surfaces all failure modes
|
||||
* as typed `FederationClientError` instances.
|
||||
*
|
||||
* ## Error code taxonomy
|
||||
*
|
||||
* | Code | When |
|
||||
* | ------------------ | ------------------------------------------------------------- |
|
||||
* | PEER_NOT_FOUND | No row in federation_peers for the given peerId |
|
||||
* | PEER_INACTIVE | Peer row exists but state !== 'active' |
|
||||
* | PEER_MISCONFIGURED | Peer row is active but missing endpointUrl or clientKeyPem |
|
||||
* | NETWORK | undici threw a connection / TLS / timeout error |
|
||||
* | HTTP_{status} | Peer returned a non-2xx response (e.g. HTTP_403, HTTP_404) |
|
||||
* | FORBIDDEN | Peer returned 403 (convenience alias alongside HTTP_403) |
|
||||
* | INVALID_RESPONSE | Response body failed Zod schema validation |
|
||||
*
|
||||
* ## Cache strategy
|
||||
*
|
||||
* Per-peer `undici.Agent` instances are cached in a `Map<peerId, AgentCacheEntry>` for
|
||||
* the lifetime of the service instance. The cache is keyed on peerId (UUID).
|
||||
*
|
||||
* Cache invalidation:
|
||||
* - `flushPeer(peerId)` — removes the entry immediately. M5/M6 MUST call this on
|
||||
* cert rotation or peer revocation events so the next request re-reads the DB and
|
||||
* builds a fresh TLS Agent with the new cert material.
|
||||
* - On cache miss: re-reads the DB, checks state === 'active', rebuilds Agent.
|
||||
*
|
||||
* Cache does NOT auto-expire. The service is expected to be a singleton scoped to the
|
||||
* NestJS application lifecycle; flushing on revocation/rotation is the only invalidation
|
||||
* path by design (avoids redundant DB round-trips on the hot path).
|
||||
*/
|
||||
|
||||
import { Injectable, Inject, Logger } from '@nestjs/common';
|
||||
import { Agent, fetch as undiciFetch } from 'undici';
|
||||
import type { Dispatcher } from 'undici';
|
||||
import { z } from 'zod';
|
||||
import { type Db, eq, federationPeers } from '@mosaicstack/db';
|
||||
import {
|
||||
FederationListResponseSchema,
|
||||
FederationGetResponseSchema,
|
||||
FederationCapabilitiesResponseSchema,
|
||||
FederationErrorEnvelopeSchema,
|
||||
type FederationListResponse,
|
||||
type FederationGetResponse,
|
||||
type FederationCapabilitiesResponse,
|
||||
} from '@mosaicstack/types';
|
||||
import { DB } from '../../database/database.module.js';
|
||||
import { unsealClientKey } from '../peer-key.util.js';
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Error taxonomy
|
||||
// ---------------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Client-side error code set. Distinct from the server-side `FederationErrorCode`
|
||||
* (which lives in `@mosaicstack/types`) because the client has additional failure
|
||||
* modes (PEER_NOT_FOUND, PEER_INACTIVE, PEER_MISCONFIGURED, NETWORK) that the
|
||||
* server never emits.
|
||||
*/
|
||||
export type FederationClientErrorCode =
|
||||
| 'PEER_NOT_FOUND'
|
||||
| 'PEER_INACTIVE'
|
||||
| 'PEER_MISCONFIGURED'
|
||||
| 'NETWORK'
|
||||
| 'FORBIDDEN'
|
||||
| 'INVALID_RESPONSE'
|
||||
| `HTTP_${number}`;
|
||||
|
||||
export interface FederationClientErrorOptions {
|
||||
status?: number;
|
||||
code: FederationClientErrorCode;
|
||||
message: string;
|
||||
peerId: string;
|
||||
cause?: unknown;
|
||||
}
|
||||
|
||||
/**
|
||||
* Thrown by FederationClientService on every failure path.
|
||||
* Callers can dispatch on `error.code` for programmatic handling.
|
||||
*/
|
||||
export class FederationClientError extends Error {
|
||||
readonly status?: number;
|
||||
readonly code: FederationClientErrorCode;
|
||||
readonly peerId: string;
|
||||
readonly cause?: unknown;
|
||||
|
||||
constructor(opts: FederationClientErrorOptions) {
|
||||
super(opts.message);
|
||||
this.name = 'FederationClientError';
|
||||
this.status = opts.status;
|
||||
this.code = opts.code;
|
||||
this.peerId = opts.peerId;
|
||||
this.cause = opts.cause;
|
||||
}
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Internal cache types
|
||||
// ---------------------------------------------------------------------------
|
||||
|
||||
interface AgentCacheEntry {
|
||||
agent: Agent;
|
||||
endpointUrl: string;
|
||||
certPem: string;
|
||||
certSerial: string;
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Service
|
||||
// ---------------------------------------------------------------------------
|
||||
|
||||
@Injectable()
|
||||
export class FederationClientService {
|
||||
private readonly logger = new Logger(FederationClientService.name);
|
||||
|
||||
/**
|
||||
* Per-peer undici Agent cache.
|
||||
* Key = peerId (UUID string).
|
||||
* Flush via `flushPeer(peerId)` on cert rotation / peer revocation (M5/M6).
|
||||
*/
|
||||
private readonly cache = new Map<string, AgentCacheEntry>();
|
||||
|
||||
constructor(@Inject(DB) private readonly db: Db) {}
|
||||
|
||||
// -------------------------------------------------------------------------
|
||||
// Public verb API
|
||||
// -------------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Invoke the `list` verb on a remote peer.
|
||||
*
|
||||
* @param peerId UUID of the peer row in `federation_peers`.
|
||||
* @param resource Resource path, e.g. "tasks".
|
||||
* @param request Free-form body sent as JSON in the POST body.
|
||||
* @returns Parsed `FederationListResponse<T>`.
|
||||
*/
|
||||
async list<T>(
|
||||
peerId: string,
|
||||
resource: string,
|
||||
request: Record<string, unknown>,
|
||||
): Promise<FederationListResponse<T>> {
|
||||
const { endpointUrl, agent } = await this.resolveEntry(peerId);
|
||||
const url = `${endpointUrl}/api/federation/v1/list/${encodeURIComponent(resource)}`;
|
||||
const body = await this.doPost(peerId, url, agent, request);
|
||||
return this.parseWith<FederationListResponse<T>>(
|
||||
peerId,
|
||||
body,
|
||||
FederationListResponseSchema(z.unknown()),
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* Invoke the `get` verb on a remote peer.
|
||||
*
|
||||
* @param peerId UUID of the peer row in `federation_peers`.
|
||||
* @param resource Resource path, e.g. "tasks".
|
||||
* @param id Resource identifier.
|
||||
* @param request Free-form body sent as JSON in the POST body.
|
||||
* @returns Parsed `FederationGetResponse<T>`.
|
||||
*/
|
||||
async get<T>(
|
||||
peerId: string,
|
||||
resource: string,
|
||||
id: string,
|
||||
request: Record<string, unknown>,
|
||||
): Promise<FederationGetResponse<T>> {
|
||||
const { endpointUrl, agent } = await this.resolveEntry(peerId);
|
||||
const url = `${endpointUrl}/api/federation/v1/get/${encodeURIComponent(resource)}/${encodeURIComponent(id)}`;
|
||||
const body = await this.doPost(peerId, url, agent, request);
|
||||
return this.parseWith<FederationGetResponse<T>>(
|
||||
peerId,
|
||||
body,
|
||||
FederationGetResponseSchema(z.unknown()),
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* Invoke the `capabilities` verb on a remote peer.
|
||||
*
|
||||
* @param peerId UUID of the peer row in `federation_peers`.
|
||||
* @returns Parsed `FederationCapabilitiesResponse`.
|
||||
*/
|
||||
async capabilities(peerId: string): Promise<FederationCapabilitiesResponse> {
|
||||
const { endpointUrl, agent } = await this.resolveEntry(peerId);
|
||||
const url = `${endpointUrl}/api/federation/v1/capabilities`;
|
||||
const body = await this.doGet(peerId, url, agent);
|
||||
return this.parseWith<FederationCapabilitiesResponse>(
|
||||
peerId,
|
||||
body,
|
||||
FederationCapabilitiesResponseSchema,
|
||||
);
|
||||
}
|
||||
|
||||
// -------------------------------------------------------------------------
|
||||
// Cache management
|
||||
// -------------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Flush the cached Agent for a specific peer.
|
||||
*
|
||||
* M5/M6 MUST call this on:
|
||||
* - cert rotation events (so new cert material is picked up)
|
||||
* - peer revocation events (so future requests fail at PEER_INACTIVE)
|
||||
*
|
||||
* After flushing, the next call to `list`, `get`, or `capabilities` for
|
||||
* this peer will re-read the DB and rebuild the Agent.
|
||||
*/
|
||||
flushPeer(peerId: string): void {
|
||||
if (this.cache.has(peerId)) {
|
||||
this.cache.delete(peerId);
|
||||
this.logger.log(`Cache flushed for peer ${peerId}`);
|
||||
}
|
||||
}
|
||||
|
||||
// -------------------------------------------------------------------------
|
||||
// Internal helpers
|
||||
// -------------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* Resolve the cache entry for a peer, reading DB on miss.
|
||||
*
|
||||
* Throws `FederationClientError` with appropriate code if the peer is not
|
||||
* found, is inactive, or is missing required fields.
|
||||
*/
|
||||
private async resolveEntry(peerId: string): Promise<AgentCacheEntry> {
|
||||
const cached = this.cache.get(peerId);
|
||||
if (cached) {
|
||||
return cached;
|
||||
}
|
||||
|
||||
// DB lookup
|
||||
const [peer] = await this.db
|
||||
.select()
|
||||
.from(federationPeers)
|
||||
.where(eq(federationPeers.id, peerId))
|
||||
.limit(1);
|
||||
|
||||
if (!peer) {
|
||||
throw new FederationClientError({
|
||||
code: 'PEER_NOT_FOUND',
|
||||
message: `Federation peer ${peerId} not found`,
|
||||
peerId,
|
||||
});
|
||||
}
|
||||
|
||||
if (peer.state !== 'active') {
|
||||
throw new FederationClientError({
|
||||
code: 'PEER_INACTIVE',
|
||||
message: `Federation peer ${peerId} is not active (state: ${peer.state})`,
|
||||
peerId,
|
||||
});
|
||||
}
|
||||
|
||||
if (!peer.endpointUrl || !peer.clientKeyPem) {
|
||||
throw new FederationClientError({
|
||||
code: 'PEER_MISCONFIGURED',
|
||||
message: `Federation peer ${peerId} is missing endpointUrl or clientKeyPem`,
|
||||
peerId,
|
||||
});
|
||||
}
|
||||
|
||||
// Unseal the private key
|
||||
let privateKeyPem: string;
|
||||
try {
|
||||
privateKeyPem = unsealClientKey(peer.clientKeyPem);
|
||||
} catch (err) {
|
||||
throw new FederationClientError({
|
||||
code: 'PEER_MISCONFIGURED',
|
||||
message: `Failed to unseal client key for peer ${peerId}`,
|
||||
peerId,
|
||||
cause: err,
|
||||
});
|
||||
}
|
||||
|
||||
// Build mTLS agent
|
||||
const agent = new Agent({
|
||||
connect: {
|
||||
cert: peer.certPem,
|
||||
key: privateKeyPem,
|
||||
// rejectUnauthorized: true is the undici default for HTTPS
|
||||
},
|
||||
});
|
||||
|
||||
const entry: AgentCacheEntry = {
|
||||
agent,
|
||||
endpointUrl: peer.endpointUrl,
|
||||
certPem: peer.certPem,
|
||||
certSerial: peer.certSerial,
|
||||
};
|
||||
|
||||
this.cache.set(peerId, entry);
|
||||
this.logger.log(`Agent cached for peer ${peerId} (serial: ${peer.certSerial})`);
|
||||
|
||||
return entry;
|
||||
}
|
||||
|
||||
/**
|
||||
* Execute a POST request with a JSON body.
|
||||
* Returns the parsed response body as an unknown value.
|
||||
* Throws `FederationClientError` on network errors and non-2xx responses.
|
||||
*/
|
||||
private async doPost(
|
||||
peerId: string,
|
||||
url: string,
|
||||
agent: Dispatcher,
|
||||
body: Record<string, unknown>,
|
||||
): Promise<unknown> {
|
||||
return this.doRequest(peerId, url, agent, {
|
||||
method: 'POST',
|
||||
headers: { 'Content-Type': 'application/json' },
|
||||
body: JSON.stringify(body),
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* Execute a GET request.
|
||||
* Returns the parsed response body as an unknown value.
|
||||
* Throws `FederationClientError` on network errors and non-2xx responses.
|
||||
*/
|
||||
private async doGet(peerId: string, url: string, agent: Dispatcher): Promise<unknown> {
|
||||
return this.doRequest(peerId, url, agent, { method: 'GET' });
|
||||
}
|
||||
|
||||
private async doRequest(
|
||||
peerId: string,
|
||||
url: string,
|
||||
agent: Dispatcher,
|
||||
init: { method: string; headers?: Record<string, string>; body?: string },
|
||||
): Promise<unknown> {
|
||||
let response: Awaited<ReturnType<typeof undiciFetch>>;
|
||||
|
||||
try {
|
||||
response = await undiciFetch(url, {
|
||||
...init,
|
||||
dispatcher: agent,
|
||||
});
|
||||
} catch (err) {
|
||||
throw new FederationClientError({
|
||||
code: 'NETWORK',
|
||||
message: `Network error calling peer ${peerId} at ${url}: ${err instanceof Error ? err.message : String(err)}`,
|
||||
peerId,
|
||||
cause: err,
|
||||
});
|
||||
}
|
||||
|
||||
const rawBody = await response.text().catch(() => '');
|
||||
|
||||
if (!response.ok) {
|
||||
const status = response.status;
|
||||
|
||||
// Attempt to parse as federation error envelope
|
||||
let serverMessage = `HTTP ${status}`;
|
||||
try {
|
||||
const json: unknown = JSON.parse(rawBody);
|
||||
const result = FederationErrorEnvelopeSchema.safeParse(json);
|
||||
if (result.success) {
|
||||
serverMessage = result.data.error.message;
|
||||
}
|
||||
} catch {
|
||||
// Not valid JSON or not a federation envelope — use generic message
|
||||
}
|
||||
|
||||
// Specific code for 403 (most actionable for callers); generic HTTP_{n} for others
|
||||
const code: FederationClientErrorCode = status === 403 ? 'FORBIDDEN' : `HTTP_${status}`;
|
||||
|
||||
throw new FederationClientError({
|
||||
status,
|
||||
code,
|
||||
message: `Peer ${peerId} returned ${status}: ${serverMessage}`,
|
||||
peerId,
|
||||
});
|
||||
}
|
||||
|
||||
try {
|
||||
return JSON.parse(rawBody) as unknown;
|
||||
} catch (err) {
|
||||
throw new FederationClientError({
|
||||
code: 'INVALID_RESPONSE',
|
||||
message: `Peer ${peerId} returned non-JSON body`,
|
||||
peerId,
|
||||
cause: err,
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Parse and validate a response body against a Zod schema.
|
||||
*
|
||||
* For list/get, callers pass the result of `FederationListResponseSchema(z.unknown())`
|
||||
* so that the envelope structure is validated without requiring a concrete item schema
|
||||
* at the client level. The generic `T` provides compile-time typing.
|
||||
*
|
||||
* Throws `FederationClientError({ code: 'INVALID_RESPONSE' })` on parse failure.
|
||||
*/
|
||||
private parseWith<T>(peerId: string, body: unknown, schema: z.ZodTypeAny): T {
|
||||
const result = schema.safeParse(body);
|
||||
if (!result.success) {
|
||||
const issues = result.error.issues
|
||||
.map((e: z.ZodIssue) => `[${e.path.join('.') || 'root'}] ${e.message}`)
|
||||
.join('; ');
|
||||
throw new FederationClientError({
|
||||
code: 'INVALID_RESPONSE',
|
||||
message: `Peer ${peerId} returned invalid response shape: ${issues}`,
|
||||
peerId,
|
||||
});
|
||||
}
|
||||
return result.data as T;
|
||||
}
|
||||
}
|
||||
13
apps/gateway/src/federation/client/index.ts
Normal file
13
apps/gateway/src/federation/client/index.ts
Normal file
@@ -0,0 +1,13 @@
|
||||
/**
|
||||
* Federation client barrel — re-exports for FederationModule consumers.
|
||||
*
|
||||
* M3-09 (QuerySourceService) and future milestones should import from here,
|
||||
* not directly from the implementation file.
|
||||
*/
|
||||
|
||||
export {
|
||||
FederationClientService,
|
||||
FederationClientError,
|
||||
type FederationClientErrorCode,
|
||||
type FederationClientErrorOptions,
|
||||
} from './federation-client.service.js';
|
||||
@@ -5,10 +5,11 @@ import { EnrollmentController } from './enrollment.controller.js';
|
||||
import { EnrollmentService } from './enrollment.service.js';
|
||||
import { FederationController } from './federation.controller.js';
|
||||
import { GrantsService } from './grants.service.js';
|
||||
import { FederationClientService } from './client/index.js';
|
||||
|
||||
@Module({
|
||||
controllers: [EnrollmentController, FederationController],
|
||||
providers: [AdminGuard, CaService, EnrollmentService, GrantsService],
|
||||
exports: [CaService, EnrollmentService, GrantsService],
|
||||
providers: [AdminGuard, CaService, EnrollmentService, GrantsService, FederationClientService],
|
||||
exports: [CaService, EnrollmentService, GrantsService, FederationClientService],
|
||||
})
|
||||
export class FederationModule {}
|
||||
|
||||
Reference in New Issue
Block a user