AugurProject/augur-ui

import { updateModal } from "modules/modal/actions/update-modal";
import { closeModal } from "modules/modal/actions/close-modal";
import TX from "ethereumjs-tx";
import { prefixHex } from "speedomatic";

import { MODAL_LEDGER } from "modules/modal/constants/modal-types";

const ledgerSigner = async (rawTxArgs, ledgerLib, derivationPath, dispatch) => {
  dispatch(
    updateModal({
      type: MODAL_LEDGER
    })
  );
  const tx = rawTxArgs[0];
  tx.v = tx.chainId; // NOTE: solves issue w/ lib setting the wrong chainId during signing, might not need in the future

  const callback = rawTxArgs[1];

  const formattedTx = new TX(rawTxArgs[0]);

  return ledgerLib
    .signTransaction(derivationPath, formattedTx.serialize().toString("hex"))
    .then(res => {
      tx.r = prefixHex(res.r);
      tx.s = prefixHex(res.s);
      tx.v = prefixHex(res.v);

      const signedTx = new TX(tx);

      callback(null, prefixHex(signedTx.serialize().toString("hex")));

      dispatch(closeModal());
    })
    .catch(err => {
      callback(err);

      dispatch(
        updateModal({
          type: MODAL_LEDGER,
          error: `Failed to Sign with "${err}" On Leger device, Make sure Contract data is Enabled`
        })
      );
    });
};

export default ledgerSigner;