From 7c953bb675a134babe6ea59d8e678a3e979757f1 Mon Sep 17 00:00:00 2001
From: Jae Kwon <jkwon.work@gmail.com>
Date: Wed, 18 Mar 2015 23:12:53 -0700
Subject: [PATCH] deprecate GAS_PRICE

---
 vm/common.go  |  5 +++--
 vm/opcodes.go | 24 ++++++++++++------------
 vm/vm.go      | 11 +++++------
 3 files changed, 20 insertions(+), 20 deletions(-)

diff --git a/vm/common.go b/vm/common.go
index 4ca4657f7..6ac0f6bbb 100644
--- a/vm/common.go
+++ b/vm/common.go
@@ -11,8 +11,9 @@ var (
 
 type Word [32]byte
 
-func (w Word) Copy() Word    { return w }
-func (w Word) Bytes() []byte { return w[:] } // copied.
+func (w Word) String() string { return string(w[:]) }
+func (w Word) Copy() Word     { return w }
+func (w Word) Bytes() []byte  { return w[:] } // copied.
 func (w Word) IsZero() bool {
 	accum := byte(0)
 	for _, byt := range w {
diff --git a/vm/opcodes.go b/vm/opcodes.go
index b570525cd..902c77703 100644
--- a/vm/opcodes.go
+++ b/vm/opcodes.go
@@ -52,7 +52,7 @@ const (
 	CALLDATACOPY
 	CODESIZE
 	CODECOPY
-	GASPRICE
+	GASPRICE_DEPRECATED
 	EXTCODESIZE
 	EXTCODECOPY
 )
@@ -204,17 +204,17 @@ var opCodeToString = map[OpCode]string{
 	SHA3: "SHA3",
 
 	// 0x30 range - closure state
-	ADDRESS:      "ADDRESS",
-	BALANCE:      "BALANCE",
-	ORIGIN:       "ORIGIN",
-	CALLER:       "CALLER",
-	CALLVALUE:    "CALLVALUE",
-	CALLDATALOAD: "CALLDATALOAD",
-	CALLDATASIZE: "CALLDATASIZE",
-	CALLDATACOPY: "CALLDATACOPY",
-	CODESIZE:     "CODESIZE",
-	CODECOPY:     "CODECOPY",
-	GASPRICE:     "TXGASPRICE",
+	ADDRESS:             "ADDRESS",
+	BALANCE:             "BALANCE",
+	ORIGIN:              "ORIGIN",
+	CALLER:              "CALLER",
+	CALLVALUE:           "CALLVALUE",
+	CALLDATALOAD:        "CALLDATALOAD",
+	CALLDATASIZE:        "CALLDATASIZE",
+	CALLDATACOPY:        "CALLDATACOPY",
+	CODESIZE:            "CODESIZE",
+	CODECOPY:            "CODECOPY",
+	GASPRICE_DEPRECATED: "TXGASPRICE_DEPRECATED",
 
 	// 0x40 range - block operations
 	BLOCKHASH:             "BLOCKHASH",
diff --git a/vm/vm.go b/vm/vm.go
index 45b3d211e..116ad1ecb 100644
--- a/vm/vm.go
+++ b/vm/vm.go
@@ -41,7 +41,6 @@ type VMParams struct {
 	BlockHash      Word
 	BlockTime      int64
 	GasLimit       uint64
-	GasPrice       uint64
 	CallStackLimit uint64
 	Origin         Word
 }
@@ -69,8 +68,8 @@ func NewVM(appState AppState, params VMParams) *VM {
 // When the function returns, *gas will be the amount of remaining gas.
 func (vm *VM) Call(caller, callee *Account, code, input []byte, value uint64, gas *uint64) (output []byte, err error) {
 
-	if len(callee.Code) == 0 {
-		panic("Call() requires callee with code")
+	if len(code) == 0 {
+		panic("Call() requires code")
 	}
 
 	fmt.Printf("(%d) (%X) %X (code=%d) gas: %v (d) %X\n", vm.callDepth, caller.Address[:4], callee.Address, len(callee.Code), *gas, input)
@@ -351,9 +350,9 @@ func (vm *VM) Call(caller, callee *Account, code, input []byte, value uint64, ga
 			copy(dest, data)
 			fmt.Printf(" => [%v, %v, %v] %X\n", memOff, codeOff, length, data)
 
-		case GASPRICE: // 0x3A
-			stack.Push64(vm.params.GasPrice)
-			fmt.Printf(" => %X\n", vm.params.GasPrice)
+		case GASPRICE_DEPRECATED: // 0x3A
+			stack.Push(Zero)
+			fmt.Printf(" => %X (GASPRICE IS DEPRECATED)\n")
 
 		case EXTCODESIZE: // 0x3B
 			addr := stack.Pop()