From 61556ef01de20a23951690376662ca58b345eca4 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Fri, 28 Nov 2014 20:47:24 +0100
Subject: [PATCH] GasData changes & removed min gas price

---
 chain/block.go            | 36 ++++++++++++++----------------------
 chain/chain_manager.go    |  2 --
 chain/state_transition.go | 18 +++++++++++++++---
 miner/miner.go            |  1 -
 4 files changed, 29 insertions(+), 28 deletions(-)

diff --git a/chain/block.go b/chain/block.go
index a4ab560dc5..dccb7ca417 100644
--- a/chain/block.go
+++ b/chain/block.go
@@ -84,8 +84,6 @@ type Block struct {
 	Time int64
 	// The block number
 	Number *big.Int
-	// Minimum Gas Price
-	MinGasPrice *big.Int
 	// Gas limit
 	GasLimit *big.Int
 	// Gas used
@@ -124,16 +122,15 @@ func CreateBlock(root interface{},
 	extra string) *Block {
 
 	block := &Block{
-		PrevHash:    prevHash,
-		Coinbase:    base,
-		Difficulty:  Difficulty,
-		Nonce:       Nonce,
-		Time:        time.Now().Unix(),
-		Extra:       extra,
-		UncleSha:    nil,
-		GasUsed:     new(big.Int),
-		MinGasPrice: new(big.Int),
-		GasLimit:    new(big.Int),
+		PrevHash:   prevHash,
+		Coinbase:   base,
+		Difficulty: Difficulty,
+		Nonce:      Nonce,
+		Time:       time.Now().Unix(),
+		Extra:      extra,
+		UncleSha:   nil,
+		GasUsed:    new(big.Int),
+		GasLimit:   new(big.Int),
 	}
 	block.SetUncles([]*Block{})
 
@@ -300,12 +297,11 @@ func (self *Block) setHeader(header *ethutil.Value) {
 	self.LogsBloom = header.Get(6).Bytes()
 	self.Difficulty = header.Get(7).BigInt()
 	self.Number = header.Get(8).BigInt()
-	self.MinGasPrice = header.Get(9).BigInt()
-	self.GasLimit = header.Get(10).BigInt()
-	self.GasUsed = header.Get(11).BigInt()
-	self.Time = int64(header.Get(12).BigInt().Uint64())
-	self.Extra = header.Get(13).Str()
-	self.Nonce = header.Get(14).Bytes()
+	self.GasLimit = header.Get(9).BigInt()
+	self.GasUsed = header.Get(10).BigInt()
+	self.Time = int64(header.Get(11).BigInt().Uint64())
+	self.Extra = header.Get(12).Str()
+	self.Nonce = header.Get(13).Bytes()
 }
 
 func NewUncleBlockFromValue(header *ethutil.Value) *Block {
@@ -351,8 +347,6 @@ func (block *Block) miningHeader() []interface{} {
 		block.Difficulty,
 		// The block number
 		block.Number,
-		// Block minimum gas price
-		block.MinGasPrice,
 		// Block upper gas bound
 		block.GasLimit,
 		// Block gas used
@@ -380,7 +374,6 @@ func (block *Block) String() string {
 	Bloom:      %x
 	Difficulty: %v
 	Number:     %v
-	MinGas:     %v
 	MaxLimit:   %v
 	GasUsed:    %v
 	Time:       %v
@@ -399,7 +392,6 @@ func (block *Block) String() string {
 		block.LogsBloom,
 		block.Difficulty,
 		block.Number,
-		block.MinGasPrice,
 		block.GasLimit,
 		block.GasUsed,
 		block.Time,
diff --git a/chain/chain_manager.go b/chain/chain_manager.go
index df390a4c00..0c3a7a9289 100644
--- a/chain/chain_manager.go
+++ b/chain/chain_manager.go
@@ -59,8 +59,6 @@ func (bc *ChainManager) NewBlock(coinbase []byte) *Block {
 		nil,
 		"")
 
-	block.MinGasPrice = big.NewInt(10000000000000)
-
 	parent := bc.CurrentBlock
 	if parent != nil {
 		block.Difficulty = CalcDifficulty(block, parent)
diff --git a/chain/state_transition.go b/chain/state_transition.go
index afe0442990..f9b82c58b0 100644
--- a/chain/state_transition.go
+++ b/chain/state_transition.go
@@ -156,12 +156,24 @@ func (self *StateTransition) TransitionState() (err error) {
 	}
 
 	// Pay data gas
-	dataPrice := big.NewInt(int64(len(self.data)))
-	dataPrice.Mul(dataPrice, vm.GasData)
-	if err = self.UseGas(dataPrice); err != nil {
+	var dgas int64
+	for _, byt := range self.data {
+		if byt != 0 {
+			dgas += vm.GasData.Int64()
+		} else {
+			dgas += 1 // This is 1/5. If GasData changes this fails
+		}
+	}
+	if err = self.UseGas(big.NewInt(dgas)); err != nil {
 		return
 	}
 
+	//dataPrice := big.NewInt(int64(len(self.data)))
+	//dataPrice.Mul(dataPrice, vm.GasData)
+	//if err = self.UseGas(dataPrice); err != nil {
+	//	return
+	//}
+
 	if sender.Balance().Cmp(self.value) < 0 {
 		return fmt.Errorf("Insufficient funds to transfer value. Req %v, has %v", self.value, sender.Balance)
 	}
diff --git a/miner/miner.go b/miner/miner.go
index a678a68956..e3435f5a6d 100644
--- a/miner/miner.go
+++ b/miner/miner.go
@@ -177,7 +177,6 @@ func (self *Miner) mine() {
 		chainMan     = self.eth.ChainManager()
 		block        = chainMan.NewBlock(self.Coinbase)
 	)
-	block.MinGasPrice = self.MinAcceptedGasPrice
 
 	// Apply uncles
 	if len(self.uncles) > 0 {