export declare const HmacAlgorithm: Readonly<{
    SHA1: "sha1";
    SHA256: "sha256";
    SHA512: "sha512";
}>;
export type HmacAlgorithm = (typeof HmacAlgorithm)[keyof typeof HmacAlgorithm];
export type Hmac = (algorithm: HmacAlgorithm, key: Uint8Array, message: Uint8Array) => Promise<Uint8Array>;