diff --git a/signers/src/zklink_signer/utils.rs b/signers/src/zklink_signer/utils.rs
index c62ca64d..44f6cd81 100644
--- a/signers/src/zklink_signer/utils.rs
+++ b/signers/src/zklink_signer/utils.rs
@@ -100,6 +100,7 @@ fn get_bits_le_fixed(fr: &Fr, size: usize) -> Vec<bool> {
 }
 
 pub fn rescue_hash_orders(msg: &[u8]) -> Vec<u8> {
+    assert_eq!(msg.len(), 178);
     let msg_bits = bytes_into_be_bits(msg);
     let hash_fr = rescue_hash_fr(msg_bits);
     let hash_bits = get_bits_le_fixed(&hash_fr, 248);
diff --git a/types/src/basic_types/params.rs b/types/src/basic_types/params.rs
index 6d6dcb33..2359a7a5 100644
--- a/types/src/basic_types/params.rs
+++ b/types/src/basic_types/params.rs
@@ -21,7 +21,7 @@ pub const USED_BALANCE_SUBTREE_DEPTH: usize = 8;
 pub const TOTAL_ACCOUNT_NUMBER: usize = usize::pow(2, USED_ACCOUNT_SUBTREE_DEPTH as u32);
 pub const MAX_ACCOUNT_ID: AccountId = AccountId(TOTAL_ACCOUNT_NUMBER as u32 - 1);
 /// The total token number and maximum token id allowed for the current zklink layer2(if not enough, modify this parameter and update circuit).
-pub const TOTAL_TOKEN_NUMBER: usize = usize::pow(2, USED_BALANCE_SUBTREE_DEPTH as u32);
+pub const TOTAL_TOKEN_NUMBER: usize = 65536;
 pub const MAX_TOKEN_ID: TokenId = TokenId(TOTAL_TOKEN_NUMBER as u32 - 1);
 /// One slot is a leaf of order subtree, slot number = 2 ^ ORDER_SUB_TREE_DEPTH, max slot id = slot number - 1
 pub const TOTAL_SLOT_NUMBER: usize = usize::pow(2, ORDER_SUB_TREE_DEPTH as u32);
@@ -210,6 +210,8 @@ pub const SIGNED_BATCH_FUNDING_BIT_WIDTH: usize = TX_TYPE_BIT_WIDTH
     + TOKEN_BIT_WIDTH
     + FEE_BIT_WIDTH;
 
+/// 0 can not be used as token id
+pub const TOKEN_ID_ZERO: u32 = 0;
 pub const CONTRACT_PRICE_BIT_WIDTH: usize = PRICE_BIT_WIDTH + PAIR_BIT_WIDTH;
 pub const CONTRACT_PRICE_BYTES: usize = CONTRACT_PRICE_BIT_WIDTH / 8;
 pub const MARGIN_PRICE_BIT_WIDTH: usize = PRICE_BIT_WIDTH + TOKEN_BIT_WIDTH;
diff --git a/types/src/tx_type/validator.rs b/types/src/tx_type/validator.rs
index 47ac7d40..159cad47 100644
--- a/types/src/tx_type/validator.rs
+++ b/types/src/tx_type/validator.rs
@@ -3,7 +3,7 @@ use crate::basic_types::pack::{is_fee_amount_packable, is_token_amount_packable}
 use crate::basic_types::params::{
     GLOBAL_ASSET_ACCOUNT_ID, MARGIN_TOKENS_NUMBER, MAX_ACCOUNT_ID, MAX_CHAIN_ID, MAX_NONCE,
     MAX_ORDER_NONCE, MAX_PRICE, MAX_SLOT_ID, MAX_SUB_ACCOUNT_ID, MAX_TOKEN_ID, MIN_PRICE,
-    USDX_TOKEN_ID_LOWER_BOUND, USDX_TOKEN_ID_UPPER_BOUND, USED_POSITION_NUMBER,
+    TOKEN_ID_ZERO, USDX_TOKEN_ID_LOWER_BOUND, USDX_TOKEN_ID_UPPER_BOUND, USED_POSITION_NUMBER,
     USED_POSITION_PAIR_ID_RANGE,
 };
 use crate::prelude::{
@@ -77,7 +77,9 @@ pub fn token_validator(token_id: &TokenId) -> Result<(), ValidationError> {
     if *token_id > MAX_TOKEN_ID {
         return Err(ValidationError::new("token id out of range"));
     }
-    if **token_id >= USDX_TOKEN_ID_LOWER_BOUND && **token_id <= USDX_TOKEN_ID_UPPER_BOUND {
+    if **token_id == TOKEN_ID_ZERO
+        || **token_id >= USDX_TOKEN_ID_LOWER_BOUND && **token_id <= USDX_TOKEN_ID_UPPER_BOUND
+    {
         return Err(ValidationError::new("token id should not use 0 or [2, 16]"));
     }
     Ok(())
diff --git a/types/src/tx_type/zklink_tx.rs b/types/src/tx_type/zklink_tx.rs
index 2150dbaa..5dccee30 100644
--- a/types/src/tx_type/zklink_tx.rs
+++ b/types/src/tx_type/zklink_tx.rs
@@ -29,25 +29,6 @@ pub enum ZkLinkTxType {
     UpdateGlobalVar,
 }
 
-impl ZkLinkTxType {
-    pub fn op_codes(&self) -> Vec<u8> {
-        match self {
-            ZkLinkTxType::Deposit => vec![Deposit::TX_TYPE],
-            ZkLinkTxType::Transfer => vec![Transfer::TX_TYPE],
-            ZkLinkTxType::Withdraw => vec![Withdraw::TX_TYPE],
-            ZkLinkTxType::FullExit => vec![FullExit::TX_TYPE],
-            ZkLinkTxType::ChangePubKey => vec![ChangePubKey::TX_TYPE],
-            ZkLinkTxType::ForcedExit => vec![ForcedExit::TX_TYPE],
-            ZkLinkTxType::OrderMatching => vec![OrderMatching::TX_TYPE],
-            ZkLinkTxType::ContractMatching => vec![ContractMatching::TX_TYPE],
-            ZkLinkTxType::Liquidation => vec![Liquidation::TX_TYPE],
-            ZkLinkTxType::AutoDeleveraging => vec![AutoDeleveraging::TX_TYPE],
-            ZkLinkTxType::UpdateGlobalVar => vec![UpdateGlobalVar::TX_TYPE],
-            ZkLinkTxType::Funding => vec![Funding::TX_TYPE],
-        }
-    }
-}
-
 /// A set of L2 transaction supported by the zklink network.
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(tag = "type")]