/** OAuth 2.0 device authorization grant (RFC 8628) */
export declare const DEVICE_AUTHORIZATION_GRANT_TYPE = "urn:ietf:params:oauth:grant-type:device_code";
/**
 * Normalize a user code for lookup (case-insensitive, ignores hyphen/spacing).
 */
export declare function normalizeDeviceUserCode(userCode: string): string;
/**
 * RFC 8628-style user code: 8 wearable characters as XXXX-XXXX.
 */
export declare function generateDeviceUserCode(): string;
export declare function generateDeviceCode(): string;