support passing bytes to fallback

src/multiParamManager.js

@@ -183,6 +183,9 @@ class MultiParamManager {
 
     if (this.funABI.inputs && this.funABI.inputs.length > 0) {
       contractProperty.classList.add(css.hasArgs)
+    } else if (this.funABI.type === 'fallback') {
+      contractProperty.classList.add(css.hasArgs)
+      this.contractActionsContainerSingle.querySelector('i').style.visibility = 'hidden'
     } else {
       this.contractActionsContainerSingle.querySelector('i').style.visibility = 'hidden'
       this.basicInputField.style.display = 'none'

src/universal-dapp.js

@@ -205,7 +205,7 @@ UniversalDApp.prototype.call = function (isUserAction, args, value, lookupOnly,
     }
   }
   // contractsDetails is used to resolve libraries
-  txFormat.buildData(args.contractName, args.contractAbi, self.data.contractsDetails, false, args.funABI, value, (error, data) => {
+  txFormat.buildData(args.contractName, args.contractAbi, self.data.contractsDetails, false, args.funABI, args.funABI.type !== 'fallback' ? value : '', (error, data) => {
     if (!error) {
       if (isUserAction) {
         if (!args.funABI.constant) {
@@ -214,6 +214,7 @@ UniversalDApp.prototype.call = function (isUserAction, args, value, lookupOnly,
           self._deps.logCallback(`${logMsg}`)
         }
       }
+      if (args.funABI.type === 'fallback') data.dataHex = value
       self.callFunction(args.address, data, args.funABI, (error, txResult) => {
         if (!error) {
           var isVM = executionContext.isVM()