From 7bb5ac045e5e2f06bbae085114aeffc80af58de4 Mon Sep 17 00:00:00 2001
From: Jeffrey Wilcke <geffobscura@gmail.com>
Date: Sat, 15 Aug 2015 00:33:52 +0200
Subject: [PATCH] xeth: added a transact mu

Added a transact mutex. The transact mutex will fix an issue where
transactions were created with the same nonce resulting in some
transactions being dropped. This happened when two concurrent calls
would call the `Transact` method (which is OK) which would both call
`GetNonce`. While the managed is thread safe it does not help us in this
case.
---
 xeth/xeth.go | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/xeth/xeth.go b/xeth/xeth.go
index 5a57608bc1..0ad0e507a2 100644
--- a/xeth/xeth.go
+++ b/xeth/xeth.go
@@ -89,8 +89,7 @@ type XEth struct {
 	messagesMu sync.RWMutex
 	messages   map[int]*whisperFilter
 
-	// regmut   sync.Mutex
-	// register map[string][]*interface{} // TODO improve return type
+	transactMu sync.Mutex
 
 	agent *miner.RemoteAgent
 
@@ -952,8 +951,9 @@ func (self *XEth) Transact(fromStr, toStr, nonceStr, valueStr, gasStr, gasPriceS
 		}
 	*/
 
-	// TODO: align default values to have the same type, e.g. not depend on
-	// common.Value conversions later on
+	self.transactMu.Lock()
+	defer self.transactMu.Unlock()
+
 	var nonce uint64
 	if len(nonceStr) != 0 {
 		nonce = common.Big(nonceStr).Uint64()