License & Auth

FBEngineConfig *config = [[FBEngineConfig alloc] init];
config.licenseToken = @"/* license token, {token} JSON, or .lic contents */";
self.beautyEffectEngine = [FBBeautyEffectEngine createEngineWithConfig:config];

BeautyEffectEngine.EngineConfig config = new BeautyEffectEngine.EngineConfig();
config.licenseToken = "/* license token, {token} JSON, or .lic contents */";
mBeautyEngine = new BeautyEffectEngine(this, config);

facebetter::EngineConfig config;
config.license_token = "/* license token, {token} JSON, or .lic contents */";
config.resource_path = "/path/to/resource.fbd";
auto engine = facebetter::BeautyEffectEngine::Create(config);

final engine = await FBEngine.create(
  FBEngineConfig(licenseToken: '/* license token, {token} JSON, or .lic contents */'),
);

config.appId = "your appId";
config.appKey = "your appKey";

import { BeautyEffectEngine, EngineConfig, createDirectAuthFetcher } from 'facebetter';

// A. Server already returned a v2 token
const config = new EngineConfig({
  licenseToken: await fetch('/api/facebetter/auth', { method: 'POST' }).then((r) => r.text()),
});

// B. Production: proxy the SDK auth request (recommended)
const config = new EngineConfig({
  authProxyUrl: '/api/facebetter/auth',
});

// C. Local debug only — keys appear in the frontend
const config = new EngineConfig({
  fetchAuthResponse: createDirectAuthFetcher({
    appId: 'your-app-id',
    appKey: 'your-app-key',
  }),
});

const engine = new BeautyEffectEngine(config);
await engine.init();

import { createHmac } from 'node:crypto';

app.post('/api/facebetter/auth', async (req, res) => {
  const { nonce, timestamp, platform, user_agent } = req.body;
  const appId = process.env.FB_APP_ID;
  const appKey = process.env.FB_APP_KEY;
  const payload = `v2|${appId}|${timestamp}|${nonce}|${platform}`;
  const hmac = createHmac('sha256', appKey).update(payload).digest('hex');

  const upstream = await fetch('https://facebetter.pixpark.net/facebetter/v2/auth', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({
      app_id: appId,
      hmac_signature: hmac,
      timestamp,
      nonce,
      platform,
      user_agent,
    }),
  });
  res.status(upstream.status).send(await upstream.text());
});