diff --git a/rpc/api.go b/rpc/api.go
index 9f0b88b48f68360c5d020aea84d389b630bc79f2..1626fd0afc9142e6367630f8c3f4232028529f1e 100644
--- a/rpc/api.go
+++ b/rpc/api.go
@@ -2,7 +2,6 @@ package rpc
 
 import (
 	"encoding/json"
-	"fmt"
 	"math/big"
 	"path"
 	"strings"
@@ -15,11 +14,6 @@ import (
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
-var (
-	defaultGasPrice = big.NewInt(150000000000)
-	defaultGas      = big.NewInt(500000)
-)
-
 type EthereumApi struct {
 	eth    *xeth.XEth
 	xethMu sync.RWMutex
@@ -109,16 +103,15 @@ func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) (err error)
 	// TODO: align default values to have the same type, e.g. not depend on
 	// common.Value conversions later on
 	if args.Gas.Cmp(big.NewInt(0)) == 0 {
-		args.Gas = defaultGas
+		args.Gas = p.xeth().DefaultGas()
 	}
 
 	if args.GasPrice.Cmp(big.NewInt(0)) == 0 {
-		args.GasPrice = defaultGasPrice
+		args.GasPrice = p.xeth().DefaultGasPrice()
 	}
 
 	*reply, err = p.xeth().Transact(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
 	if err != nil {
-		fmt.Println("err:", err)
 		return err
 	}
 
@@ -199,7 +192,7 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 	case "eth_mining":
 		*reply = p.xeth().IsMining()
 	case "eth_gasPrice":
-		*reply = common.ToHex(defaultGasPrice.Bytes())
+		*reply = common.ToHex(p.xeth().DefaultGas().Bytes())
 	case "eth_accounts":
 		*reply = p.xeth().Accounts()
 	case "eth_blockNumber":
diff --git a/xeth/xeth.go b/xeth/xeth.go
index 504a93f5872f3af7b2dd0e5a0ee4a43469bef826..690db51350baca631e27b62efc660c70803b8e0e 100644
--- a/xeth/xeth.go
+++ b/xeth/xeth.go
@@ -25,6 +25,8 @@ import (
 var (
 	pipelogger       = logger.NewLogger("XETH")
 	filterTickerTime = 5 * time.Minute
+	defaultGasPrice  = big.NewInt(10000000000000) //150000000000
+	defaultGas       = big.NewInt(90000)          //500000
 )
 
 // to resolve the import cycle
@@ -154,6 +156,9 @@ func (self *XEth) stop() {
 	close(self.quit)
 }
 
+func (self *XEth) DefaultGas() *big.Int      { return defaultGas }
+func (self *XEth) DefaultGasPrice() *big.Int { return defaultGasPrice }
+
 func (self *XEth) AtStateNum(num int64) *XEth {
 	chain := self.Backend().ChainManager()
 	var block *types.Block
@@ -486,11 +491,6 @@ func (self *XEth) PushTx(encodedTx string) (string, error) {
 	return common.ToHex(tx.Hash()), nil
 }
 
-var (
-	defaultGasPrice = big.NewInt(10000000000000)
-	defaultGas      = big.NewInt(90000)
-)
-
 func (self *XEth) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr string) (string, error) {
 	statedb := self.State().State() //self.chainManager.TransState()
 	msg := callmsg{