ledger-bitsong-js/src/helperV2.js

Node API for BitSong App (Ledger Nano S/X)

import { signSendChunkv1 } from "./helperV1";
import { CLA, ERROR_CODE, errorCodeToString, INS, PAYLOAD_TYPE, processErrorResponse } from "./common";

export function serializePathv2(path) {
  if (!path || path.length !== 5) {
    throw new Error("Invalid path.");
  }

  const buf = Buffer.alloc(20);
  buf.writeUInt32LE(0x80000000 + path[0], 0);
  buf.writeUInt32LE(0x80000000 + path[1], 4);
  buf.writeUInt32LE(0x80000000 + path[2], 8);
  buf.writeUInt32LE(path[3], 12);
  buf.writeUInt32LE(path[4], 16);

  return buf;
}

export async function signSendChunkv2(app, chunkIdx, chunkNum, chunk) {
  let payloadType = PAYLOAD_TYPE.ADD;
  if (chunkIdx === 1) {
    payloadType = PAYLOAD_TYPE.INIT;
  }
  if (chunkIdx === chunkNum) {
    payloadType = PAYLOAD_TYPE.LAST;
  }

  return signSendChunkv1(app, payloadType, 0, chunk);
}

export async function publicKeyv2(app, data) {
  return app.transport.send(CLA, INS.GET_ADDR_SECP256K1, 0, 0, data, [ERROR_CODE.NoError]).then(response => {
    const errorCodeData = response.slice(-2);
    const returnCode = errorCodeData[0] * 256 + errorCodeData[1];
    const compressedPk = Buffer.from(response.slice(0, 33));

    return {
      pk: "OBSOLETE PROPERTY",
      compressed_pk: compressedPk,
      return_code: returnCode,
      error_message: errorCodeToString(returnCode),
    };
  }, processErrorResponse);
}