export declare function decodeFirst<Type>(input: Uint8Array): Type;
export declare function toBuffer(base64urlString: string, from?: "base64" | "base64url"): Uint8Array;
export declare function shouldRemoveLeadingZero(bytes: Uint8Array): boolean;
export declare function parseAuthenticatorData(authData: Uint8Array): {
    rpIdHash: Uint8Array;
    flagsBuf: Uint8Array;
    flags: {
        up: boolean;
        uv: boolean;
        be: boolean;
        bs: boolean;
        at: boolean;
        ed: boolean;
        flagsInt: number;
    };
    counter: number;
    counterBuf: Uint8Array;
    aaguid: Uint8Array | undefined;
    credentialID: Uint8Array | undefined;
    credentialPublicKey: Uint8Array | undefined;
    credentialPublicKeyDecoded: Uint8Array | undefined;
};
export declare function concatUint8Arrays(a: Uint8Array, b: Uint8Array): Uint8Array;