/**
 * OAuth Device Flow implementation for Qwen
 */
export interface DeviceAuthorization {
    device_code: string;
    user_code: string;
    verification_uri: string;
    verification_uri_complete: string;
    expires_in: number;
    interval: number;
    verifier: string;
}
export declare function authorizeDevice(): Promise<DeviceAuthorization>;
export declare function pollForToken(deviceCode: string, codeVerifier: string, intervalSeconds: number, expiresIn: number): Promise<{
    success: boolean;
    access_token?: string;
    refresh_token?: string;
    expires_in?: number;
    api_key?: string;
    error?: string;
}>;
/**
 * Refresh an expired access token using a refresh token
 * Uses mutex to prevent race conditions when multiple requests
 * try to refresh the token simultaneously
 */
export declare function refreshAccessToken(refreshToken: string): Promise<{
    success: boolean;
    access_token?: string;
    refresh_token?: string;
    expires_in?: number;
    api_key?: string;
    error?: string;
}>;
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