message: Make payment ID a string rather than a number
diff: @@ -845,7 +845,7 @@ class Eth extends BaseCoin {
  const gasPrice = Math.round((feeEstimate.feeEstimate) / gasLimit);
  const gasPriceMax = gasPrice * 5;
  // Payment id a random number so its different for every tx
  - const paymentId = Math.floor(Math.random() * 10000000000);
  + const paymentId = Math.floor(Math.random() * 10000000000).toString();
  const hopDigest: Buffer = Eth.getHopDigest([recipientAddress, recipientAmount, gasPriceMax, gasLimit, paymentId]);
  const userReqSig = optionalDeps.ethUtil.addHexPrefix(secp256k1.sign(hopDigest, userPrvBuffer).signature.toString('hex'));
  