From d654fa0d4eb547880acc55caed85de7ea5f466a8 Mon Sep 17 00:00:00 2001
From: facuMH <facumolina15@gmail.com>
Date: Wed, 11 Sep 2024 16:25:19 +0200
Subject: [PATCH] adjust berlin stati costs to not account for warm access

---
 go/interpreter/lfvm/gas.go               | 14 ++++++------
 go/interpreter/lfvm/instructions.go      |  4 ++--
 go/interpreter/lfvm/instructions_test.go | 29 ++++--------------------
 3 files changed, 14 insertions(+), 33 deletions(-)

diff --git a/go/interpreter/lfvm/gas.go b/go/interpreter/lfvm/gas.go
index 680ac0047..916b7828d 100644
--- a/go/interpreter/lfvm/gas.go
+++ b/go/interpreter/lfvm/gas.go
@@ -79,10 +79,10 @@ func initBerlinGasPrice() {
 	static_gas_prices_berlin[EXTCODESIZE] = 100
 	static_gas_prices_berlin[EXTCODEHASH] = 100
 	static_gas_prices_berlin[BALANCE] = 100
-	static_gas_prices_berlin[CALL] = 100
-	static_gas_prices_berlin[CALLCODE] = 100
-	static_gas_prices_berlin[STATICCALL] = 100
-	static_gas_prices_berlin[DELEGATECALL] = 100
+	static_gas_prices_berlin[CALL] = 0
+	static_gas_prices_berlin[CALLCODE] = 0
+	static_gas_prices_berlin[STATICCALL] = 0
+	static_gas_prices_berlin[DELEGATECALL] = 0
 	static_gas_prices_berlin[SELFDESTRUCT] = 5000
 }
 
@@ -230,11 +230,11 @@ func getStaticGasPriceInternal(op OpCode) tosca.Gas {
 	case CREATE2:
 		return 32000
 	case CALL:
-		return 700 // Should be 100 according to evm.code
+		return 700
 	case CALLCODE:
 		return 700
 	case STATICCALL:
-		return 700 // Should be 100 according to evm.code
+		return 700
 	case RETURN:
 		return 0
 	case STOP:
@@ -244,7 +244,7 @@ func getStaticGasPriceInternal(op OpCode) tosca.Gas {
 	case INVALID:
 		return 0
 	case DELEGATECALL:
-		return 700 // Should be 100 according to evm.code
+		return 700
 	case SELFDESTRUCT:
 		return 0 // should be 5000 according to evm.code
 
diff --git a/go/interpreter/lfvm/instructions.go b/go/interpreter/lfvm/instructions.go
index 5477d026f..4481fbf39 100644
--- a/go/interpreter/lfvm/instructions.go
+++ b/go/interpreter/lfvm/instructions.go
@@ -1087,9 +1087,9 @@ func getAccessCost(accessStatus tosca.AccessStatus) tosca.Gas {
 	// however, the warm access cost is charged as part of the base gas cost.
 	// (https://eips.ethereum.org/EIPS/eip-2929)
 	if accessStatus == tosca.ColdAccess {
-		return tosca.Gas(2500)
+		return tosca.Gas(2600)
 	}
-	return tosca.Gas(0)
+	return tosca.Gas(100)
 }
 
 func genericCall(c *context, kind tosca.CallKind) {
diff --git a/go/interpreter/lfvm/instructions_test.go b/go/interpreter/lfvm/instructions_test.go
index 530c07646..c8a5775f6 100644
--- a/go/interpreter/lfvm/instructions_test.go
+++ b/go/interpreter/lfvm/instructions_test.go
@@ -881,31 +881,12 @@ func TestExpansionCostOverflow(t *testing.T) {
 	}
 }
 
-func TestCallChargesAppropriatelyForColdWarmAccess(t *testing.T) {
-
-	tests := map[string]struct {
-		accessStatus tosca.AccessStatus
-		cost         tosca.Gas
-	}{
-		"warm": {
-			accessStatus: tosca.WarmAccess,
-		},
-		"cold": {
-			accessStatus: tosca.ColdAccess,
-			cost:         2500,
-		},
+func TestGetAccessCost_RespondsWithProperGasPrice(t *testing.T) {
+	if want, got := tosca.Gas(100), getAccessCost(tosca.WarmAccess); want != got {
+		t.Errorf("unexpected gas cost, wanted %d, got %d", want, got)
 	}
-
-	for name, test := range tests {
-		t.Run(name, func(t *testing.T) {
-
-			cost := getAccessCost(test.accessStatus)
-
-			if cost != test.cost {
-				t.Errorf("unexpected gas cost, wanted %v, got %v", test.cost, cost)
-			}
-
-		})
+	if want, got := tosca.Gas(2600), getAccessCost(tosca.ColdAccess); want != got {
+		t.Errorf("unexpected gas cost, wanted %d, got %d", want, got)
 	}
 }