/**
 * In-memory passkey storage adapter.
 *
 * Useful for tests and server-side environments. Data is lost when the process
 * restarts.
 */
import type { StorageAdapter, StoredPasskey } from "../types.js";
export declare class MemoryStorage implements StorageAdapter {
    private passkeys;
    save(passkey: StoredPasskey): Promise<void>;
    get(keyId: string): Promise<StoredPasskey | null>;
    getByContract(contractId: string): Promise<StoredPasskey[]>;
    getAll(): Promise<StoredPasskey[]>;
    delete(keyId: string): Promise<void>;
    update(keyId: string, updates: Partial<Omit<StoredPasskey, "keyId" | "publicKey">>): Promise<void>;
    clear(): Promise<void>;
}
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