export interface UserConfig {
    email?: string;
    email_hash?: string;
    api_key?: string;
    license_key?: string;
}
export interface Identity {
    email_hash?: string;
    api_key?: string;
}
export declare function loadUserConfig(): Promise<UserConfig>;
export declare function saveUserConfig(config: UserConfig): Promise<void>;
export declare function hashEmail(email: string): string;
/**
 * Resolve identity from config + environment.
 * Priority: ASSAY_API_KEY env > config api_key > config email_hash
 */
export declare function getIdentity(config: UserConfig): Identity;