/// <reference types="chrome" />
import type { IConfigCatCache, IConfigCatKernel } from "configcat-common";
export declare class LocalStorageCache implements IConfigCatCache {
    private readonly storage;
    static setup(kernel: IConfigCatKernel, localStorageGetter?: () => chrome.storage.LocalStorageArea | null): IConfigCatKernel;
    constructor(storage: chrome.storage.LocalStorageArea);
    set(key: string, value: string): Promise<void>;
    get(key: string): Promise<string | undefined>;
}
export declare function toUtf8Base64(str: string): string;
export declare function fromUtf8Base64(str: string): string;
//# sourceMappingURL=Cache.d.ts.map