marketplaces/docs/PACKAGES-USAGE.md

# Using `@marketplaces/auth` and `@marketplaces/payment`

How to install and consume the shared packages in `marketplaces` or any other project. For *why* they exist see [ADR-0001](context/adrs/ADR-0001-extract-auth-and-payment-into-shared-marketplaces-packages.md); for how they are built and released see [PACKAGE-EXTRACTION.md](PACKAGE-EXTRACTION.md).

## 1. Install

Nothing to set up. The packages are installed straight over git from release branches in [vitanovaPackages](https://sources.vitanova.network/sdarbinyan/vitanovaPackages.git), where the repo root *is* the package:

```json
"@marketplaces/auth": "git+https://sources.vitanova.network/sdarbinyan/vitanovaPackages.git#release/auth"
```

That is already in `marketplaces`' `package.json`, so a fresh clone plus `npm install` just works — **no npm registry, no auth token, no SSH tunnel, no CI secret.** Anonymous git read is the only requirement.

To add it to another project:

```bash
npm install "git+https://sources.vitanova.network/sdarbinyan/vitanovaPackages.git#release/auth"
```

**On pinning:** a branch ref tracks the tip, so `npm install` can pick up a new build. That is deliberate while the package churns. For reproducible installs, replace `#release/auth` with a commit SHA. See [ADR-0001](context/adrs/ADR-0001-extract-auth-and-payment-into-shared-marketplaces-packages.md) on blast radius.

## 2. Required providers

`@marketplaces/auth` has no knowledge of any specific app's environment config. It reads two injection tokens, both provided by the consuming app in `app.config.ts`:

```ts
import { AUTH_API_URL, TELEGRAM_BOT_USERNAME } from '@marketplaces/auth';
import { environment } from '../environments/environment';

export const appConfig: ApplicationConfig = {
  providers: [
    { provide: AUTH_API_URL, useValue: environment.authApiUrl },
    { provide: TELEGRAM_BOT_USERNAME, useValue: environment.telegramBot },
    // ...
  ]
};
```

| Token | Required | Meaning |
|---|---|---|
| `AUTH_API_URL` | yes | Base URL of the auth backend, e.g. `https://api.example.com`. Both auth mechanisms build their endpoints from this. |
| `TELEGRAM_BOT_USERNAME` | no | Bot username for QR/deep-link login URLs. Falls back to a default if absent. |

Missing `AUTH_API_URL` produces `NG0201: No provider found for InjectionToken @marketplaces/auth AUTH_API_URL` at the first injection — including in unit tests, where any `TestBed` that constructs a component touching auth must provide it:

```ts
TestBed.configureTestingModule({
  providers: [{ provide: AUTH_API_URL, useValue: 'https://test.local' }],
});
```

## 3. What is in the package

Two independent auth mechanisms. They deliberately share no state — a customer QR scan never authenticates an admin session or vice versa (distinct cookies, signals, guards, interceptors).

### `telegram/` — live today

Telegram QR/session auth against `{AUTH_API_URL}/users/sessions`. One backend endpoint set, used by both customer and admin login; only *storage* differs.

| Export | What it is |
|---|---|
| `AuthService` | Customer session. Signals: `session`, `status`, `isAuthenticated`, `showLoginDialog`, `displayName`. Methods: `checkSession()`, `createWebSession()`, `requestLogin()`, `hideLogin()`, `logout()`, `onTelegramLoginComplete()`, `getTelegramAppLoginUrl()`. Cookie `webSessionID`, `SameSite=Lax`. |
| `AdminAuthService` | Admin session. Same signal/method shape plus `getAdminToken()`/`setAdminTokens()`/`clearAdminTokens()` (reserved for when the backend issues admin JWTs) and `devBypassLogin()` (no-ops outside dev mode). Cookie `adminSessionID`, `SameSite=Strict`. |
| `TelegramSessionApiService` | Thin HTTP client + response normalization. Holds no state, writes no cookies. |
| `adminAuthGuard` | `CanActivateFn` — allows if the admin session is authenticated, otherwise opens the login dialog. |
| `adminAuthHeadersInterceptor` | Attaches `AdminWebSessionID` (and `Authorization: Bearer` when a token exists) to admin-gated paths only (`/admin/`, `/backoffice/`, `/builder/`, `/media/`). Never touches customer requests. |
| `AuthSession`, `WebSessionStart`, `AuthStatus`, `AdminAuthStatus` | Wire/state types. |

Typical usage:

```ts
import { AuthService, AdminAuthService, adminAuthGuard, adminAuthHeadersInterceptor } from '@marketplaces/auth';

// routes
{ path: 'backoffice', canActivate: [adminAuthGuard], loadComponent: ... }

// http
provideHttpClient(withInterceptors([adminAuthHeadersInterceptor, ...]))

// component
private readonly auth = inject(AuthService);
readonly isLoggedIn = this.auth.isAuthenticated;   // signal
```

**Security note:** the Telegram session API has no concept of "admin." The frontend cannot distinguish an admin Telegram session from a regular one — it only decides *where to store* the result. Real admin authorization must be enforced server-side on every admin request. See [TRACK-S](backend/TRACK-S-SECURITY-RBAC-CONTRACT.md).

### `ed25519/` — prepared, backend not shipped

Challenge/response admin auth: `GET /api/admin/auth/challenge` → sign nonce with a device-local non-extractable Ed25519 key → `POST /api/admin/auth/verify` → JWT pair. Calling these today 404s/connection-errors, which surfaces as the `backend-unavailable` error screen. Nothing is mocked.

| Export | What it is |
|---|---|
| `AuthFacade` | The surface components should use. `isAuthenticated`, `status`, `role`, `loginPhase`, `lastError`; `login(redirectTo?)`, `logout(redirectTo?)`, `restoreSession()`, `can(permission)`. |
| `Ed25519AuthService` | Low-level flow orchestrator (exported under this name so it doesn't collide with the telegram `AuthService`). |
| `SessionService` | JWT/refresh pair + derived claims, auto-refresh before expiry. |
| `Ed25519KeypairService` | WebCrypto Ed25519 keypair in IndexedDB. Private key is non-extractable and never leaves the device. |
| `PermissionService` | Derives permissions from the JWT `role` claim. UI-only gate. |
| `JwtService` | Decode only, never verification — the frontend has no trusted key; signature checking is the backend's job on every request. |
| `Ed25519VerificationService` / `NoopEd25519VerificationService` | Abstract seam + fail-closed default binding. |
| `AdminRole`, `Permission`, `ROLE_PERMISSIONS`, `AuthChallenge`, `AuthTokenPair`, `JwtClaims`, `AuthError`, `AuthErrorCode`, … | Types and wire contracts. |

Bind the verification seam in `app.config.ts`:

```ts
{ provide: Ed25519VerificationService, useClass: NoopEd25519VerificationService },
```

## 4. What deliberately stayed in the app

`AdminPermissionsService` and `requireAdminPermission` live in `marketplaces` (`src/app/core/admin-auth/`), not in the package. They read this app's mock Users domain to derive a permission set — app-specific, not a portable auth concern. If another project needs permission gating it should use the package's `PermissionService` (JWT-claim-driven) instead.

## 5. `@marketplaces/payment`

Published at `0.1.0` but **scaffold only** — no implementation yet, nothing exported, and `marketplaces` does not depend on it. `core/finance` and `core/pricing` still live in the app. Payment business logic is server-side by design (see [Phase 1](backend/PHASE-1-MONEY-FX-PAYMENTS-CONTRACT.md) and [Phase 7](backend/PHASE-7-PAYMENTS-RECONCILIATION-CONTRACT.md)); the eventual package is a thin client for FX/pricing/checkout gateways.

## 6. Making a change to a package

1. Clone [vitanovaPackages](https://sources.vitanova.network/sdarbinyan/vitanovaPackages.git).
2. Edit under `packages/auth/src` (or `packages/payment/src`), export from `index.ts`.
3. `npx changeset` at the repo root — pick the package and bump type, write one line about the change.
4. Commit, push, open a PR to `main`. CI builds, tests, and rejects the PR if the changeset is missing.
5. On merge, CI rebuilds and force-pushes `release/auth` / `release/payment`, and opens a "Version Packages" PR if there are unreleased changesets.
6. In `marketplaces`, run `npm update @marketplaces/auth`, then the build + test suite before merging.

Never commit to a `release/*` branch — they are generated and force-pushed. Never edit `node_modules/@marketplaces/*` — overwritten on every install.