import { PersistedIdentity } from './types';
export interface StorageProvider {
    load(): Promise<PersistedIdentity | null>;
    save(identity: PersistedIdentity): Promise<void>;
    exists(): Promise<boolean>;
}
export declare class FileStorage implements StorageProvider {
    private filePath;
    constructor(customPath?: string);
    load(): Promise<PersistedIdentity | null>;
    save(identity: PersistedIdentity): Promise<void>;
    exists(): Promise<boolean>;
}
export declare class MemoryStorage implements StorageProvider {
    private static instances;
    private key;
    constructor(key?: string);
    load(): Promise<PersistedIdentity | null>;
    save(identity: PersistedIdentity): Promise<void>;
    exists(): Promise<boolean>;
    static clear(): void;
}
export declare class EnvironmentStorage {
    static load(): PersistedIdentity | null;
}
export declare class CombinedStorage implements StorageProvider {
    private providers;
    private primaryProvider;
    constructor(providers: StorageProvider[]);
    load(): Promise<PersistedIdentity | null>;
    save(identity: PersistedIdentity): Promise<void>;
    exists(): Promise<boolean>;
}
export declare class StorageFactory {
    static create(options?: {
        storage?: 'file' | 'memory' | 'auto';
        customPath?: string;
        memoryKey?: string;
        encryptionPassword?: string;
    }): StorageProvider;
}