From 296166fea82a3e964b948f02e1d33dca3918c4eb Mon Sep 17 00:00:00 2001
From: yann300 <yann.levreau@gmail.com>
Date: Wed, 9 May 2018 18:05:10 +0200
Subject: [PATCH 1/3] Update txHelper.js

---
 remix-lib/src/execution/txHelper.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/remix-lib/src/execution/txHelper.js b/remix-lib/src/execution/txHelper.js
index d65c580819..28a8804aa2 100644
--- a/remix-lib/src/execution/txHelper.js
+++ b/remix-lib/src/execution/txHelper.js
@@ -21,6 +21,7 @@ module.exports = {
   },
 
   encodeFunctionId: function (funABI) {
+    if (funABI.type === 'fallback') return ''
     var abi = new ethers.Interface([funABI])
     abi = abi.functions[funABI.name]
     return abi.sighash

From ce64772df71452ffeae4a27316a05d40c03d443c Mon Sep 17 00:00:00 2001
From: yann300 <yann.levreau@gmail.com>
Date: Wed, 9 May 2018 18:25:38 +0200
Subject: [PATCH 2/3] better return

---
 remix-lib/src/execution/txHelper.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/remix-lib/src/execution/txHelper.js b/remix-lib/src/execution/txHelper.js
index 28a8804aa2..41478fabd9 100644
--- a/remix-lib/src/execution/txHelper.js
+++ b/remix-lib/src/execution/txHelper.js
@@ -21,7 +21,7 @@ module.exports = {
   },
 
   encodeFunctionId: function (funABI) {
-    if (funABI.type === 'fallback') return ''
+    if (funABI.type === 'fallback') return '0x'
     var abi = new ethers.Interface([funABI])
     abi = abi.functions[funABI.name]
     return abi.sighash

From e5250839dc4296a85591c700beffb7eb426d12f8 Mon Sep 17 00:00:00 2001
From: yann300 <yann.levreau@gmail.com>
Date: Wed, 9 May 2018 18:25:41 +0200
Subject: [PATCH 3/3] add test

---
 remix-lib/test/txFormat.js | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/remix-lib/test/txFormat.js b/remix-lib/test/txFormat.js
index b6a908f124..3935ec8db1 100644
--- a/remix-lib/test/txFormat.js
+++ b/remix-lib/test/txFormat.js
@@ -1,6 +1,7 @@
 'use strict'
 var tape = require('tape')
 var txFormat = require('../src/execution/txFormat')
+var txHelper = require('../src/execution/txHelper')
 var compiler = require('solc')
 var compilerInput = require('../src/helpers/compilerHelper').compilerInput
 var executionContext = require('../src/execution/execution-context')
@@ -149,6 +150,17 @@ function encodeFunctionCallTest (st) {
 
 /* *********************************************************** */
 
+tape('test fallback function', function (t) {
+  t.test('(fallback)', function (st) {
+    st.plan(2)
+    var output = compiler.compileStandardWrapper(compilerInput(fallbackFunction))
+    output = JSON.parse(output)
+    var contract = output.contracts['test.sol']['fallbackFunctionContract']
+    st.equal(txHelper.encodeFunctionId(contract.abi[0]), '0x805da4ad')
+    st.equal(txHelper.encodeFunctionId(contract.abi[1]), '0x')
+  })
+})
+
 var uintContract = `contract uintContractTest {
     uint _tp;
     address _ap;
@@ -186,3 +198,13 @@ contract testContractLinkLibrary {
         
  }
  }`
+
+var fallbackFunction = `pragma solidity ^0.4.4;
+
+contract fallbackFunctionContract { 
+    function get (uint _p, string _o) {
+        
+    }
+    
+    function () {}
+ }`