From 83f9e4666899a04f98da9185e526479de33aa54b Mon Sep 17 00:00:00 2001
From: BhuzOr <giaquinta.adriano@gmail.com>
Date: Sun, 4 Jun 2017 15:16:49 +0200
Subject: [PATCH] Validate block timestamps

Reject blocks with timestamp too far in the future
Backport from BitShares: https://github.com/bitshares/bitshares-core/pull/17
---
 libraries/app/application.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libraries/app/application.cpp b/libraries/app/application.cpp
index ea5789b8..a700837a 100644
--- a/libraries/app/application.cpp
+++ b/libraries/app/application.cpp
@@ -493,6 +493,7 @@ namespace detail {
       { try {
 
          auto latency = graphene::time::now() - blk_msg.block.timestamp;
+         FC_ASSERT( (latency.count()/1000) > -5000, "Rejecting block with timestamp in the future" );
          if (!sync_mode || blk_msg.block.block_num() % 10000 == 0)
          {
             const auto& witness = blk_msg.block.witness(*_chain_db);