From 6cee15544f08fa64f1feab57fbaa7a9a24333cac Mon Sep 17 00:00:00 2001
From: Calin Culianu <calin.culianu@gmail.com>
Date: Mon, 4 Feb 2019 04:23:13 +0200
Subject: [PATCH] Implemented update_required for BitcoinCash and
 BitcoinCashTestnet (#717)

Anti-phishing:

If the client version < 3.3.4, will return the error message telling
user to upgrade at electroncash.org
---
 electrumx/lib/coins.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/electrumx/lib/coins.py b/electrumx/lib/coins.py
index b16928d..c09eaee 100644
--- a/electrumx/lib/coins.py
+++ b/electrumx/lib/coins.py
@@ -403,6 +403,17 @@ class BitcoinCash(BitcoinMixin, Coin):
     ]
     BLOCK_PROCESSOR = block_proc.LTORBlockProcessor
 
+    @classmethod
+    def upgrade_required(cls, client_ver):
+        if client_ver < (3, 3, 4):
+            return ('<br/><br/>'
+                    'Your transaction was successfully broadcast.<br/><br/>'
+                    'However, you are using a VULNERABLE version of Electron Cash.<br/>'
+                    'Download the latest version from this web site ONLY:<br/>'
+                    'https://electroncash.org/'
+                    '<br/><br/>')
+        return False
+
 
 class BitcoinSegwit(BitcoinMixin, Coin):
     NAME = "BitcoinSegwit"
@@ -600,6 +611,17 @@ class BitcoinCashTestnet(BitcoinTestnetMixin, Coin):
     ]
     BLOCK_PROCESSOR = block_proc.LTORBlockProcessor
 
+    @classmethod
+    def upgrade_required(cls, client_ver):
+        if client_ver < (3, 3, 4):
+            return ('<br/><br/>'
+                    'Your transaction was successfully broadcast.<br/><br/>'
+                    'However, you are using a VULNERABLE version of Electron Cash.<br/>'
+                    'Download the latest version from this web site ONLY:<br/>'
+                    'https://electroncash.org/'
+                    '<br/><br/>')
+        return False
+
 
 class BitcoinSVRegtest(BitcoinSVTestnet):
     NET = "regtest"