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455
multi-ai-brainstorm/qwen-client.js
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455
multi-ai-brainstorm/qwen-client.js
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/**
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* Qwen API Client for Multi-AI Brainstorm
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* Integrates with PromptArch's Qwen OAuth service
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*/
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const DEFAULT_ENDPOINT = "https://dashscope-intl.aliyuncs.com/compatible-mode/v1";
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const PROMPTARCH_PROXY = "https://www.rommark.dev/tools/promptarch/api/qwen/chat";
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const CREDENTIALS_PATH = `${process.env.HOME}/.claude/qwen-credentials.json`;
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// Qwen OAuth Configuration (from Qwen Code source)
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const QWEN_OAUTH_BASE_URL = 'https://chat.qwen.ai';
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const QWEN_OAUTH_DEVICE_CODE_ENDPOINT = `${QWEN_OAUTH_BASE_URL}/api/v1/oauth2/device/code`;
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const QWEN_OAUTH_TOKEN_ENDPOINT = `${QWEN_OAUTH_BASE_URL}/api/v1/oauth2/token`;
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const QWEN_OAUTH_CLIENT_ID = 'f0304373b74a44d2b584a3fb70ca9e56';
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const QWEN_OAUTH_SCOPE = 'openid profile email model.completion';
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const QWEN_OAUTH_GRANT_TYPE = 'urn:ietf:params:oauth:grant-type:device_code';
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/**
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* Qwen API Client Class
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*/
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class QwenClient {
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constructor() {
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this.apiKey = null;
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this.accessToken = null;
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this.refreshToken = null;
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this.tokenExpiresAt = null;
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this.endpoint = DEFAULT_ENDPOINT;
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this.model = "coder-model";
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}
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/**
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* Initialize client with credentials
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*/
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async initialize() {
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try {
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const fs = require('fs');
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if (fs.existsSync(CREDENTIALS_PATH)) {
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const credentials = JSON.parse(fs.readFileSync(CREDENTIALS_PATH, 'utf8'));
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// Handle both API key and OAuth token credentials
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if (credentials.accessToken) {
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this.accessToken = credentials.accessToken;
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this.refreshToken = credentials.refreshToken;
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this.tokenExpiresAt = credentials.tokenExpiresAt;
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this.endpoint = credentials.endpoint || DEFAULT_ENDPOINT;
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// Check if token needs refresh
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if (this.isTokenExpired()) {
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await this.refreshAccessToken();
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}
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return true;
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} else if (credentials.apiKey) {
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this.apiKey = credentials.apiKey;
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this.endpoint = credentials.endpoint || DEFAULT_ENDPOINT;
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return true;
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}
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}
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} catch (error) {
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// No credentials stored yet
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}
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return false;
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}
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/**
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* Check if access token is expired
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*/
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isTokenExpired() {
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if (!this.tokenExpiresAt) return false;
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// Add 5 minute buffer before expiration
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return Date.now() >= (this.tokenExpiresAt - 5 * 60 * 1000);
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}
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/**
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* Prompt user for authentication method
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*/
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async promptForCredentials() {
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const readline = require('readline');
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const rl = readline.createInterface({
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input: process.stdin,
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output: process.stdout
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});
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return new Promise((resolve, reject) => {
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rl.question(
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'\n🔐 Choose authentication method:\n' +
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' 1. OAuth (Recommended) - Free 2000 requests/day with qwen.ai account\n' +
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' 2. API Key - Get it at https://help.aliyun.com/zh/dashscope/\n\n' +
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'Enter choice (1 or 2): ',
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async (choice) => {
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rl.close();
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if (choice === '1') {
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try {
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await this.performOAuthFlow();
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resolve(true);
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} catch (error) {
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reject(error);
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}
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} else if (choice === '2') {
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await this.promptForAPIKey();
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resolve(true);
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} else {
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reject(new Error('Invalid choice. Please enter 1 or 2.'));
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}
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}
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);
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});
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}
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/**
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* Prompt user for API key only
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*/
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async promptForAPIKey() {
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const readline = require('readline');
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const rl = readline.createInterface({
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input: process.stdin,
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output: process.stdout
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});
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return new Promise((resolve, reject) => {
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rl.question('Enter your Qwen API key (get it at https://help.aliyun.com/zh/dashscope/): ', (key) => {
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if (!key || key.trim().length === 0) {
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rl.close();
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reject(new Error('API key is required'));
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return;
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}
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this.apiKey = key.trim();
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this.saveCredentials();
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rl.close();
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resolve(true);
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});
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});
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}
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/**
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* Save credentials to file
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*/
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saveCredentials() {
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try {
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const fs = require('fs');
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const path = require('path');
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const dir = path.dirname(CREDENTIALS_PATH);
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if (!fs.existsSync(dir)) {
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fs.mkdirSync(dir, { recursive: true });
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}
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const credentials = {
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endpoint: this.endpoint
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};
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// Save OAuth tokens
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if (this.accessToken) {
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credentials.accessToken = this.accessToken;
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credentials.refreshToken = this.refreshToken;
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credentials.tokenExpiresAt = this.tokenExpiresAt;
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}
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// Save API key
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else if (this.apiKey) {
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credentials.apiKey = this.apiKey;
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}
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fs.writeFileSync(
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CREDENTIALS_PATH,
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JSON.stringify(credentials, null, 2)
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);
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console.log(`✓ Credentials saved to ${CREDENTIALS_PATH}`);
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} catch (error) {
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console.warn('Could not save credentials:', error.message);
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}
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}
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/**
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* Generate PKCE code verifier and challenge pair
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*/
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generatePKCEPair() {
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const crypto = require('crypto');
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const codeVerifier = crypto.randomBytes(32).toString('base64url');
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const codeChallenge = crypto.createHash('sha256')
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.update(codeVerifier)
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.digest('base64url');
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return { code_verifier: codeVerifier, code_challenge: codeChallenge };
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}
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/**
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* Convert object to URL-encoded form data
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*/
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objectToUrlEncoded(data) {
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return Object.keys(data)
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.map((key) => `${encodeURIComponent(key)}=${encodeURIComponent(data[key])}`)
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.join('&');
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}
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/**
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* Perform OAuth 2.0 Device Code Flow (from Qwen Code implementation)
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*/
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async performOAuthFlow() {
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const { exec } = require('child_process');
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console.log('\n🔐 Starting Qwen OAuth Device Code Flow...\n');
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// Generate PKCE parameters
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const { code_verifier, code_challenge } = this.generatePKCEPair();
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// Step 1: Request device authorization
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console.log('Requesting device authorization...');
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const deviceAuthResponse = await fetch(QWEN_OAUTH_DEVICE_CODE_ENDPOINT, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/x-www-form-urlencoded',
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'Accept': 'application/json',
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},
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body: this.objectToUrlEncoded({
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client_id: QWEN_OAUTH_CLIENT_ID,
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scope: QWEN_OAUTH_SCOPE,
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code_challenge: code_challenge,
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code_challenge_method: 'S256',
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}),
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});
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if (!deviceAuthResponse.ok) {
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const error = await deviceAuthResponse.text();
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throw new Error(`Device authorization failed: ${deviceAuthResponse.status} - ${error}`);
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}
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const deviceAuth = await deviceAuthResponse.json();
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if (!deviceAuth.device_code) {
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throw new Error('Invalid device authorization response');
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}
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// Step 2: Display authorization instructions
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console.log('\n=== Qwen OAuth Device Authorization ===\n');
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console.log('1. Visit this URL in your browser:\n');
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console.log(` ${deviceAuth.verification_uri_complete}\n`);
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console.log('2. Sign in to your qwen.ai account and authorize\n');
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console.log('Waiting for authorization to complete...\n');
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// Try to open browser automatically
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try {
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const openCommand = process.platform === 'darwin' ? 'open' :
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process.platform === 'win32' ? 'start' : 'xdg-open';
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exec(`${openCommand} "${deviceAuth.verification_uri_complete}"`, (err) => {
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if (err) {
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console.debug('Could not open browser automatically');
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}
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});
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} catch (err) {
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console.debug('Failed to open browser:', err.message);
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}
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// Step 3: Poll for token
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let pollInterval = 2000; // Start with 2 seconds
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const maxAttempts = Math.ceil(deviceAuth.expires_in / (pollInterval / 1000));
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let attempt = 0;
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while (attempt < maxAttempts) {
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attempt++;
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try {
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console.debug(`Polling for token (attempt ${attempt}/${maxAttempts})...`);
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const tokenResponse = await fetch(QWEN_OAUTH_TOKEN_ENDPOINT, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/x-www-form-urlencoded',
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'Accept': 'application/json',
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},
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body: this.objectToUrlEncoded({
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grant_type: QWEN_OAUTH_GRANT_TYPE,
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client_id: QWEN_OAUTH_CLIENT_ID,
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device_code: deviceAuth.device_code,
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code_verifier: code_verifier,
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}),
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});
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// Check for pending authorization (standard OAuth RFC 8628 response)
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if (tokenResponse.status === 400) {
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const errorData = await tokenResponse.json();
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if (errorData.error === 'authorization_pending') {
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// User hasn't authorized yet, continue polling
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await new Promise(resolve => setTimeout(resolve, pollInterval));
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continue;
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}
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if (errorData.error === 'slow_down') {
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// Polling too frequently, increase interval
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pollInterval = Math.min(pollInterval * 1.5, 10000);
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await new Promise(resolve => setTimeout(resolve, pollInterval));
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continue;
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}
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// Other 400 errors (authorization_declined, expired_token, etc.)
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throw new Error(`Authorization failed: ${errorData.error} - ${errorData.error_description || 'No description'}`);
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}
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if (!tokenResponse.ok) {
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const error = await tokenResponse.text();
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throw new Error(`Token request failed: ${tokenResponse.status} - ${error}`);
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}
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// Success! We have the token
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const tokenData = await tokenResponse.json();
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if (!tokenData.access_token) {
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throw new Error('Token response missing access_token');
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}
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// Save credentials
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this.accessToken = tokenData.access_token;
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this.refreshToken = tokenData.refresh_token;
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this.tokenExpiresAt = tokenData.expires_in ?
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Date.now() + (tokenData.expires_in * 1000) : null;
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this.saveCredentials();
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console.log('\n✓ OAuth authentication successful!');
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console.log('✓ Access token obtained and saved.\n');
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return;
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} catch (error) {
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// Check if this is a fatal error (not pending/slow_down)
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if (error.message.includes('Authorization failed') ||
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error.message.includes('Token request failed')) {
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throw error;
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}
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// For other errors, wait and retry
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await new Promise(resolve => setTimeout(resolve, pollInterval));
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}
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}
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throw new Error('OAuth authentication timeout');
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}
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/**
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* Refresh access token using refresh token
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*/
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async refreshAccessToken() {
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if (!this.refreshToken) {
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throw new Error('No refresh token available. Please re-authenticate.');
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}
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console.log('🔄 Refreshing access token...');
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const tokenResponse = await fetch(QWEN_OAUTH_TOKEN_ENDPOINT, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/x-www-form-urlencoded',
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},
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body: this.objectToUrlEncoded({
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grant_type: 'refresh_token',
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refresh_token: this.refreshToken,
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client_id: QWEN_OAUTH_CLIENT_ID,
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}),
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});
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if (!tokenResponse.ok) {
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const error = await tokenResponse.text();
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throw new Error(`Token refresh failed: ${tokenResponse.status} - ${error}`);
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}
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const tokens = await tokenResponse.json();
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this.accessToken = tokens.access_token;
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if (tokens.refresh_token) {
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this.refreshToken = tokens.refresh_token;
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}
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this.tokenExpiresAt = tokens.expires_in ?
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Date.now() + (tokens.expires_in * 1000) : null;
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this.saveCredentials();
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console.log('✓ Token refreshed successfully');
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}
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/**
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* Get the authentication key (prefer OAuth access token, fallback to API key)
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*/
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getAuthKey() {
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return this.accessToken || this.apiKey;
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}
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/**
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* Make a chat completion request
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*/
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async chatCompletion(messages, options = {}) {
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const authKey = this.getAuthKey();
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if (!authKey) {
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throw new Error('Qwen API key not configured. Run /multi-ai-brainstorm first to set up.');
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}
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// Check if OAuth token needs refresh
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if (this.accessToken && this.isTokenExpired()) {
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await this.refreshAccessToken();
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}
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const {
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model = this.model,
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stream = false,
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temperature = 0.7,
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maxTokens = 2000
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} = options;
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const payload = {
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model,
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messages,
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stream,
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temperature,
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max_tokens: maxTokens
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};
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try {
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const response = await fetch(PROMPTARCH_PROXY, {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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'Authorization': `Bearer ${authKey}`
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},
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body: JSON.stringify({
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endpoint: this.endpoint,
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...payload
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})
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});
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if (!response.ok) {
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const error = await response.text();
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throw new Error(`Qwen API error (${response.status}): ${error}`);
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}
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const data = await response.json();
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return data.choices?.[0]?.message?.content || '';
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} catch (error) {
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if (error.message.includes('fetch')) {
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throw new Error('Network error. Please check your internet connection.');
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}
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throw error;
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}
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}
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/**
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* Check if client is authenticated
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*/
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isAuthenticated() {
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return !!(this.accessToken || this.apiKey);
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}
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}
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// Singleton instance
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const client = new QwenClient();
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module.exports = client;
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