diff --git a/common/constants.go b/common/constants.go
index c0d9004c67..9566b4bf42 100644
--- a/common/constants.go
+++ b/common/constants.go
@@ -77,6 +77,7 @@ var BaseTopUp = big.NewInt(100)
 var BaseRecall = big.NewInt(100)
 var TIPTRC21Fee = big.NewInt(38383838)
 var TIPTRC21FeeTestnet = big.NewInt(38383838)
+var BlockNumberGas50x = big.NewInt(TIPTRC21Fee.Int64() + 30000000)
 var LimitTimeFinality = uint64(30) // limit in 30 block
 
 var IgnoreSignerCheckBlockArray = map[uint64]bool{
diff --git a/common/gas.go b/common/gas.go
new file mode 100644
index 0000000000..a5b5690a76
--- /dev/null
+++ b/common/gas.go
@@ -0,0 +1,34 @@
+package common
+
+import "math/big"
+
+var MinGasPrice50x = big.NewInt(12500000000)
+var GasPrice50x = big.NewInt(12500000000)
+
+func GetGasFee(blockNumber, gas uint64) *big.Int {
+	fee := new(big.Int).SetUint64(gas)
+
+	if blockNumber >= BlockNumberGas50x.Uint64() {
+		fee = fee.Mul(fee, GasPrice50x)
+	} else if blockNumber > TIPTRC21Fee.Uint64() {
+		fee = fee.Mul(fee, TRC21GasPrice)
+	}
+
+	return fee
+}
+
+func GetGasPrice(number *big.Int) *big.Int {
+	if number == nil || number.Cmp(BlockNumberGas50x) < 0 {
+		return new(big.Int).Set(TRC21GasPrice)
+	} else {
+		return new(big.Int).Set(GasPrice50x)
+	}
+}
+
+func GetMinGasPrice(number *big.Int) *big.Int {
+	if number == nil || number.Cmp(BlockNumberGas50x) < 0 {
+		return new(big.Int).Set(MinGasPrice)
+	} else {
+		return new(big.Int).Set(MinGasPrice50x)
+	}
+}