From 48125a25eb9f4ece2613559ced5075bde1c75c7a Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Tue, 28 Oct 2014 13:26:30 +0100
Subject: [PATCH] Added missing requires on SSTORE SLOAD

---
 vm/common.go   | 23 ++++++++++++-----------
 vm/vm_debug.go |  6 +++++-
 2 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/vm/common.go b/vm/common.go
index c73744506..16a0b5523 100644
--- a/vm/common.go
+++ b/vm/common.go
@@ -19,17 +19,18 @@ const (
 )
 
 var (
-	GasStep    = big.NewInt(1)
-	GasSha     = big.NewInt(20)
-	GasSLoad   = big.NewInt(20)
-	GasSStore  = big.NewInt(100)
-	GasBalance = big.NewInt(20)
-	GasCreate  = big.NewInt(100)
-	GasCall    = big.NewInt(20)
-	GasMemory  = big.NewInt(1)
-	GasData    = big.NewInt(5)
-	GasTx      = big.NewInt(500)
-	GasLog     = big.NewInt(32)
+	GasStep         = big.NewInt(1)
+	GasSha          = big.NewInt(20)
+	GasSLoad        = big.NewInt(20)
+	GasSStore       = big.NewInt(100)
+	GasSStoreRefund = big.NewInt(100)
+	GasBalance      = big.NewInt(20)
+	GasCreate       = big.NewInt(100)
+	GasCall         = big.NewInt(20)
+	GasMemory       = big.NewInt(1)
+	GasData         = big.NewInt(5)
+	GasTx           = big.NewInt(500)
+	GasLog          = big.NewInt(32)
 
 	Pow256 = ethutil.BigPow(2, 256)
 
diff --git a/vm/vm_debug.go b/vm/vm_debug.go
index d38373411..1e45813bc 100644
--- a/vm/vm_debug.go
+++ b/vm/vm_debug.go
@@ -169,9 +169,13 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 
 			gas.Set(ethutil.Big0)
 		case SLOAD:
+			require(1)
+
 			gas.Set(GasSLoad)
 		// Memory resize & Gas
 		case SSTORE:
+			require(2)
+
 			var mult *big.Int
 			y, x := stack.Peekn()
 			val := closure.GetStorage(x)
@@ -179,7 +183,7 @@ func (self *DebugVm) RunClosure(closure *Closure) (ret []byte, err error) {
 				// 0 => non 0
 				mult = ethutil.Big3
 			} else if val.BigInt().Cmp(ethutil.Big0) != 0 && len(y.Bytes()) == 0 {
-				state.Refund(closure.caller.Address(), big.NewInt(100), closure.Price)
+				state.Refund(closure.caller.Address(), GasSStoreRefund, closure.Price)
 
 				mult = ethutil.Big0
 			} else {