diff --git a/abi/src/lib.rs b/abi/src/lib.rs
index e16e684..908f834 100644
--- a/abi/src/lib.rs
+++ b/abi/src/lib.rs
@@ -283,17 +283,21 @@ macro_rules! create_zkwasm_apis {
                 }
                 let command = unsafe {wasm_input(0)};
                 let command_length = ((command & 0xff00) >> 8)  as usize;
+                zkwasm_rust_sdk::dbg!("cmd length: {}\n", command_length);
                 unsafe { zkwasm_rust_sdk::require(command_length < 16) };
                 params.push(command);
                 for _  in 0..command_length - 1 {
                     params.push(unsafe {wasm_input(0)});
                 }
+                zkwasm_rust_sdk::dbg!("sig verify\n");
                 verify_tx_signature(params.clone());
+                zkwasm_rust_sdk::dbg!("success\n");
                 handle_tx(params);
                 let trace = unsafe {wasm_trace_size()};
                 zkwasm_rust_sdk::dbg!("trace track: {}\n", trace);
             }
 
+            zkwasm_rust_sdk::dbg!("trace after tx handlers\n");
             unsafe { zkwasm_rust_sdk::require(preempt()) };
 
             let bytes = finalize();