/**
 * IndexedDB passkey storage adapter.
 *
 * Recommended for web apps: larger limits than localStorage, an async API that
 * doesn't block the main thread, and native `Uint8Array` support.
 */
import type { StorageAdapter, StoredPasskey } from "../types.js";
export declare class IndexedDBStorage implements StorageAdapter {
    private dbName;
    private dbPromise;
    constructor(dbName?: string);
    private getDB;
    private withStore;
    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>;
    /** Close the database connection. */
    close(): Promise<void>;
    /** Delete the entire database. */
    static deleteDatabase(dbName?: string): Promise<void>;
}
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