From 731a33b3bd4a3585d6e627f81699d1c154c7ebe9 Mon Sep 17 00:00:00 2001
From: Radu Ioan Fericean <radu@fericean.ro>
Date: Wed, 6 Jan 2016 14:29:11 +0200
Subject: [PATCH] unique refund account ids

---
 engine/calldesc.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/engine/calldesc.go b/engine/calldesc.go
index 667f1656b..d372f1c98 100644
--- a/engine/calldesc.go
+++ b/engine/calldesc.go
@@ -745,10 +745,15 @@ func (cd *CallDescriptor) RefundIncrements() (left float64, err error) {
 	cd.account = nil // make sure it's not cached
 	// get account list for locking
 	// all must be locked in order to use cache
+	accMap := make(map[string]struct{})
 	var accountIDs []string
 	for _, increment := range cd.Increments {
-		accountIDs = append(accountIDs, increment.BalanceInfo.AccountId)
+		accMap[increment.BalanceInfo.AccountId] = struct{}{}
 	}
+	for key := range accMap {
+		accountIDs = append(accountIDs, key)
+	}
+	// start increment refunding loop
 	Guardian.Guard(func() (interface{}, error) {
 		accountsCache := make(map[string]*Account)
 		for _, increment := range cd.Increments {