/**
 * Opens an IndexedDB database with the given name and calls the upgradeNeeded callback if the database needs to be created or upgraded.
 * @param name The name of the database to open
 * @param upgradeNeeded The callback to call if the database needs to be created or upgraded
 */
export declare function openIndexDB(name: string, upgradeNeeded: (database: IDBDatabase) => void): Promise<IDBDatabase>;
/**
 * Gets a value from the database for the given store and key.
 * @param database defines the database to get the value from
 * @param storeName defines the name of the store to get the value from
 * @param key defines the key of the value to get
 */
export declare function getFromIndexDB<T>(database: IDBDatabase, storeName: string, key: string): Promise<T | null>;
/**
 * Puts a value in the database for the given store and key.
 * @param database defines the database to put the value in
 * @param storeName defines the name of the store to put the value in
 * @param data defines the value to put in the database
 */
export declare function putInIndexDB<T>(database: IDBDatabase, storeName: string, data: T): Promise<void>;