block/state: gas price for block and tx

block/block.go

@@ -107,12 +107,16 @@ type Header struct {
 	Height         uint
 	Time           time.Time
 	Fees           uint64
+	GasPrice       uint64
 	NumTxs         uint
 	LastBlockHash  []byte
 	LastBlockParts PartSetHeader
 	StateHash      []byte
 }
 
+// possible for actual gas price to be less than 1
+var GasPriceDivisor = 1000000
+
 func (h *Header) Hash() []byte {
 	buf := new(bytes.Buffer)
 	hasher, n, err := sha256.New(), new(int64), new(error)

block/tx.go

@@ -10,14 +10,15 @@ import (
 )
 
 var (
-	ErrTxInvalidAddress    = errors.New("Error invalid address")
-	ErrTxDuplicateAddress  = errors.New("Error duplicate address")
-	ErrTxInvalidAmount     = errors.New("Error invalid amount")
-	ErrTxInsufficientFunds = errors.New("Error insufficient funds")
-	ErrTxUnknownPubKey     = errors.New("Error unknown pubkey")
-	ErrTxInvalidPubKey     = errors.New("Error invalid pubkey")
-	ErrTxInvalidSignature  = errors.New("Error invalid signature")
-	ErrTxInvalidSequence   = errors.New("Error invalid sequence")
+	ErrTxInvalidAddress       = errors.New("Error invalid address")
+	ErrTxDuplicateAddress     = errors.New("Error duplicate address")
+	ErrTxInvalidAmount        = errors.New("Error invalid amount")
+	ErrTxInsufficientFunds    = errors.New("Error insufficient funds")
+	ErrTxInsufficientGasPrice = errors.New("Error insufficient gas price")
+	ErrTxUnknownPubKey        = errors.New("Error unknown pubkey")
+	ErrTxInvalidPubKey        = errors.New("Error invalid pubkey")
+	ErrTxInvalidSignature     = errors.New("Error invalid signature")
+	ErrTxInvalidSequence      = errors.New("Error invalid sequence")
 )
 
 /*