import { Storage, StorageKey, StorageKeyReturnType } from '@tezos-x/octez.connect-types';
export declare class IndexedDBStorage extends Storage {
    private readonly dbName;
    private readonly storeNames;
    private db;
    private isSupported;
    /**
     * @param dbName Name of the database.
     * @param storeNames An array of object store names to create in the database.
     *                   The first store in the array will be used as the default if none is specified.
     */
    constructor(dbName?: string, storeNames?: string[]);
    private isIndexedDBSupported;
    private initDB;
    /**
     * Performs a transaction on the given object store.
     * @param mode Transaction mode.
     * @param storeName The name of the object store.
     * @param operation The operation to perform with the object store.
     */
    private transaction;
    /**
     * Retrieves a value by key from the specified object store.
     * If no store is specified, the default (first in the list) is used.
     */
    get<K extends StorageKey>(key: K, storeName?: string): Promise<StorageKeyReturnType[K]>;
    get(key: string, storeName?: string): Promise<string | undefined>;
    /**
     * Stores a key/value pair in the specified object store.
     */
    set<K extends StorageKey>(key: K, value: StorageKeyReturnType[K], storeName?: string): Promise<void>;
    set(key: string, value: string, storeName?: string): Promise<void>;
    /**
     * Deletes an entry by key from the specified object store.
     */
    delete<K extends StorageKey>(key: K, storeName?: string): Promise<void>;
    delete(key: string, storeName?: string): Promise<void>;
    /**
     * Retrieves all values from the specified object store.
     */
    getAll(storeName?: string): Promise<string[]>;
    /**
     * Retrieves all keys from the specified object store.
     */
    getAllKeys(storeName?: string): Promise<IDBValidKey[]>;
    /**
     * Clears all entries from the specified object store.
     */
    clearStore(storeName?: string): Promise<void>;
    getPrefixedKey<K extends StorageKey>(key: K): string;
    subscribeToStorageChanged(callback: (arg: {
        eventType: 'storageCleared' | 'entryModified';
        key: string | null;
        oldValue: string | null;
        newValue: string | null;
    }) => {}): Promise<void>;
    /**
     * Copies all key/value pairs from the source store into a target store.
     * @param targetDBName Name of the target database.
     * @param targetStoreName Name of the target object store.
     * @param skipKeys Keys to skip.
     * @param sourceStoreName (Optional) Source store name – defaults to the default store.
     */
    fillStore(targetDBName: string, targetStoreName: string, skipKeys?: string[], sourceStoreName?: string): Promise<void>;
}