const Iota = require('@iota/core');


exports.createTransaction = async (to, wallet, token) => {
  const iota = Iota.composeAPI({
    provider: token.networkUrl
  });
  const value = parseInt(token.maxSupplyAllowed);

  // generates current account to send funds from
  const inputAddress = Iota.generateAddress(wallet.privateKey, wallet.nonce, 2);
  // generates new empty slot in in account array to send leftover funds to
  const newAddress = Iota.generateAddress(
    wallet.privateKey,
    wallet.nonce + 5,
    2
  );
  // get balance of current account
  const balances = await iota.getBalances([inputAddress], 100);
  const [ balance ] = balances.balances;

  // transfer funds to user, leftover funds to the newAddress created above
  const transfers = [
    {
      value,
      address: to
    },
    {
      value: balance - value,
      address: newAddress
    }
  ];

  const option = {
    inputs: [
      {
        address: inputAddress,
        keyIndex: wallet.nonce,
        balance: balance,
        security: 2
      }
    ]
  };
  const raw = await iota.prepareTransfers(wallet.privateKey, transfers, option);
  const hash = await iota.sendTrytes(raw, 3, 9);
  return hash[0].hash;
};

exports.sendTransaction = async (txn, options) => {
  return Object.assign(options, {
    hash: txn
  });
};