diff --git a/types/src/tx_type/contract/mod.rs b/types/src/tx_type/contract/mod.rs
index e01b42b..f06d912 100644
--- a/types/src/tx_type/contract/mod.rs
+++ b/types/src/tx_type/contract/mod.rs
@@ -12,22 +12,24 @@ pub use liquidation::Liquidation;
 pub use prices::{ContractPrice, OraclePrices, SpotPriceInfo};
 pub use update_global_var::{Parameter, UpdateGlobalVar};
 
+use super::zklink_tx::ZkLinkTxType;
+
 impl Contract {
     pub const MSG_TYPE: u8 = 0xfe;
 }
 
 impl ContractMatching {
-    pub const TX_TYPE: u8 = 0x09;
+    pub const TX_TYPE: u8 = ZkLinkTxType::ContractMatching as u8;
 }
 impl Liquidation {
-    pub const TX_TYPE: u8 = 0x0a;
+    pub const TX_TYPE: u8 = ZkLinkTxType::Liquidation as u8;
 }
 impl AutoDeleveraging {
-    pub const TX_TYPE: u8 = 0x0b;
+    pub const TX_TYPE: u8 = ZkLinkTxType::AutoDeleveraging as u8;
 }
 impl UpdateGlobalVar {
-    pub const TX_TYPE: u8 = 0x0c;
+    pub const TX_TYPE: u8 = ZkLinkTxType::UpdateGlobalVar as u8;
 }
 impl Funding {
-    pub const TX_TYPE: u8 = 0x0d;
+    pub const TX_TYPE: u8 = ZkLinkTxType::Funding as u8;
 }
diff --git a/types/src/tx_type/mod.rs b/types/src/tx_type/mod.rs
index d3fc5b1..6b39626 100644
--- a/types/src/tx_type/mod.rs
+++ b/types/src/tx_type/mod.rs
@@ -19,6 +19,7 @@ use zklink_sdk_signers::zklink_signer::error::ZkSignerError;
 use zklink_sdk_signers::zklink_signer::pk_signer::{sha256_bytes, ZkLinkSigner};
 use zklink_sdk_signers::zklink_signer::signature::ZkLinkSignature;
 use zklink_sdk_signers::zklink_signer::PubKeyHash;
+use zklink_tx::ZkLinkTxType;
 
 pub mod validator;
 
@@ -34,25 +35,25 @@ pub mod withdraw;
 pub mod zklink_tx;
 
 impl Deposit {
-    pub const TX_TYPE: u8 = 0x01;
+    pub const TX_TYPE: u8 = ZkLinkTxType::Deposit as u8;
 }
 impl Withdraw {
-    pub const TX_TYPE: u8 = 0x03;
+    pub const TX_TYPE: u8 = ZkLinkTxType::Withdraw as u8;
 }
 impl Transfer {
-    pub const TX_TYPE: u8 = 0x04;
+    pub const TX_TYPE: u8 = ZkLinkTxType::Transfer as u8;
 }
 impl FullExit {
-    pub const TX_TYPE: u8 = 0x05;
+    pub const TX_TYPE: u8 = ZkLinkTxType::FullExit as u8;
 }
 impl ChangePubKey {
-    pub const TX_TYPE: u8 = 0x06;
+    pub const TX_TYPE: u8 = ZkLinkTxType::ChangePubKey as u8;
 }
 impl ForcedExit {
-    pub const TX_TYPE: u8 = 0x07;
+    pub const TX_TYPE: u8 = ZkLinkTxType::ForcedExit as u8;
 }
 impl OrderMatching {
-    pub const TX_TYPE: u8 = 0x08;
+    pub const TX_TYPE: u8 = ZkLinkTxType::OrderMatching as u8;
 }
 
 /// Construct the first part of the message that should be signed by Ethereum key.
diff --git a/types/src/tx_type/zklink_tx.rs b/types/src/tx_type/zklink_tx.rs
index 9bcb359..6405310 100644
--- a/types/src/tx_type/zklink_tx.rs
+++ b/types/src/tx_type/zklink_tx.rs
@@ -17,18 +17,18 @@ use wasm_bindgen::prelude::wasm_bindgen;
 #[wasm_bindgen]
 #[derive(Debug, Clone, Serialize, Deserialize, Eq, PartialEq)]
 pub enum ZkLinkTxType {
-    Deposit,
-    FullExit,
-    ChangePubKey,
-    Transfer,
-    Withdraw,
-    ForcedExit,
-    OrderMatching,
-    AutoDeleveraging,
-    ContractMatching,
-    Funding,
-    Liquidation,
-    UpdateGlobalVar,
+    Deposit = 0x01,
+    FullExit = 0x05,
+    ChangePubKey = 0x06,
+    Transfer = 0x04,
+    Withdraw = 0x03,
+    ForcedExit = 0x07,
+    OrderMatching = 0x08,
+    AutoDeleveraging = 0x0b,
+    ContractMatching = 0x09,
+    Funding = 0x0d,
+    Liquidation = 0x0a,
+    UpdateGlobalVar = 0x0c,
 }
 
 /// A set of L2 transaction supported by the zklink network.