DRY up the use of fromHex and put it in ethutil

xeth/types.go

@@ -17,15 +17,6 @@ import (
 func toHex(b []byte) string {
 	return "0x" + ethutil.Bytes2Hex(b)
 }
-func fromHex(s string) []byte {
-	if len(s) > 1 {
-		if s[0:2] == "0x" {
-			s = s[2:]
-		}
-		return ethutil.Hex2Bytes(s)
-	}
-	return nil
-}
 
 type Object struct {
 	*state.StateObject
@@ -123,7 +114,7 @@ func (self *Block) ToString() string {
 }
 
 func (self *Block) GetTransaction(hash string) *Transaction {
-	tx := self.ref.Transaction(fromHex(hash))
+	tx := self.ref.Transaction(ethutil.FromHex(hash))
 	if tx == nil {
 		return nil
 	}