diff --git a/token-core/tcx/src/handler.rs b/token-core/tcx/src/handler.rs
index 529b4882..401ff28c 100644
--- a/token-core/tcx/src/handler.rs
+++ b/token-core/tcx/src/handler.rs
@@ -983,7 +983,6 @@ pub(crate) fn sign_authentication_message(data: &[u8]) -> Result<Vec<u8>> {
     })
 }
 
-// TODO: add eth sub addr support
 pub(crate) fn derive_sub_accounts(data: &[u8]) -> Result<Vec<u8>> {
     let param: DeriveSubAccountsParam =
         DeriveSubAccountsParam::decode(data).expect("DeriveSubAccountsParam");
diff --git a/token-core/tcx/src/lib.rs b/token-core/tcx/src/lib.rs
index ddb4477a..9ed4f2c4 100644
--- a/token-core/tcx/src/lib.rs
+++ b/token-core/tcx/src/lib.rs
@@ -100,7 +100,7 @@ pub unsafe extern "C" fn call_tcx_api(hex_str: *const c_char) -> *const c_char {
         "zksync_private_key_to_pubkey_hash" => {
             landingpad(|| zksync_private_key_to_pubkey_hash(&action.param.unwrap().value))
         }
-        "generate_mnemonic" => landingpad(|| generate_mnemonic()),
+        // "generate_mnemonic" => landingpad(|| generate_mnemonic()),
         "remove_wallets" => landingpad(|| remove_wallet(&action.param.unwrap().value)),
         "encrypt_data_to_ipfs" => landingpad(|| encrypt_data_to_ipfs(&action.param.unwrap().value)),
         "decrypt_data_from_ipfs" => {