/*
 * Copyright 2020 - MATTR Limited
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { getNativeRnBbsSignatures } from "./getNativeRnBbsSignatures";
import type { Bls12381ToBbsRequest, BbsKeyPair } from "./types";
import { UInt8ArrayToArray } from "./utilities";

const RnBbsSignatures = getNativeRnBbsSignatures();

/**
 * Converts a BLS12-381 G2 key to a BBS+ key
 * @param request Request for the key conversion
 *
 * @returns A BbsKeyPair
 */
export const bls12381toBbs = async (request: Bls12381ToBbsRequest): Promise<BbsKeyPair> => {
  try {
    const result = await RnBbsSignatures.bls12381G2PublicKeyToBbsPublicKey({
      publicKey: UInt8ArrayToArray(request.keyPair.publicKey),
      messageCount: request.messageCount,
    });
    return {
      secretKey: request.keyPair.secretKey,
      publicKey: new Uint8Array(result),
      messageCount: request.messageCount,
    };
  } catch (ex) {
    console.log(ex);
    throw new Error("Failed to convert key");
  }
};