export type KeychainKey = 'ai-api-key' | 'watchdog-nsec' | 'demo-nsec' | `ai:${string}`;
export interface KeychainBackend {
    store(key: KeychainKey, value: string): Promise<void>;
    retrieve(key: KeychainKey): Promise<string | null>;
    delete(key: KeychainKey): Promise<void>;
    backendName(): string;
}
export declare function getKeychain(): KeychainBackend;
export declare function getKeychainBackendName(): string;
export declare const ALL_KEYS: KeychainKey[];