import { CID } from "multiformats/cid";
export declare function hashStringAsync(str: string): Promise<string>;
export declare function hashStringSync(str: string): string;
export declare function hashObjectSync(o: unknown): string;
export declare function hashObjectAsync(o: unknown): Promise<string>;
export declare function hashObjectCID(o: unknown): Promise<{
    cid: CID;
    bytes: Uint8Array;
    obj: unknown;
}>;
export declare function deepFreeze<T>(o: T): T | undefined;