Make txHex optional for submitTransaction

Summary: ETH transactions has no notion of txHex

Reviewers: arik, barath

Reviewed By: barath

Subscribers: ben

Differential Revision: https://phabricator.bitgo.com/D6150

Author: RobertBaron

package.json

@@ -1,6 +1,6 @@
 {
   "name": "bitgo",
-  "version": "3.5.0",
+  "version": "3.5.1",
   "description": "BitGo Javascript SDK",
   "main": "./src/index.js",
   "keywords": [

src/v2/wallet.js

@@ -558,7 +558,7 @@ Wallet.prototype.signTransaction = function(params, callback) {
  * @param callback
  */
 Wallet.prototype.submitTransaction = function(params, callback) {
-  common.validateParams(params, ['txHex'], ['otp'], callback);
+  common.validateParams(params, [], ['otp', 'txHex'], callback);
   return this.bitgo.post(this.baseCoin.url('/wallet/' + this.id() + '/tx/send'))
   .send(params)
   .result()