refactor: optimize transaction bytes validation logic

qubipy/rpc/rpc_client.py

@@ -54,7 +54,8 @@ def broadcast_transaction(self, tx: bytes) -> Dict[str, Any]:
             QubiPy_Exceptions: If there is an issue broadcasting the transaction.
         """
 
-        check_bytes(tx)
+        if is_tx_bytes_invalid(tx):
+            raise QubiPy_Exceptions(QubiPy_Exceptions.INVALID_TX_BYTES)
 
         tx_encoded = base64.b64encode(tx).decode('utf-8')
         payload = json.dumps({

qubipy/utils.py

@@ -42,21 +42,20 @@ def check_ticks_format(start_tick: int, end_tick: int):
 
     if start_tick <= 0 or end_tick <= 0:
         raise QubiPy_Exceptions(QubiPy_Exceptions.INVALID_START_TICK_AND_END_TICK)
-
-def check_bytes(tx: bytes):
 
+
+def is_tx_bytes_invalid(tx: bytes) -> bool:
     """
     Validates that the input transaction data is in bytes format.
 
     Args:
-        tx (bytes): The transaction data to validate. Must be of type bytes or bytearray.
+        tx (bytes): The transaction data to validate. Must be of type bytes or bytearray
+                   and not empty.
 
-    Raises:
-        QubiPy_Exceptions: If the transaction data is not in bytes or bytearray format.
+    Returns:
+        bool: True if the transaction data is invalid, False if valid
     """
-
-    if not isinstance(tx, (bytes, bytearray)):
-            raise QubiPy_Exceptions(QubiPy_Exceptions.INVALID_TX_BYTES)
+    return not isinstance(tx, (bytes, bytearray)) or len(tx) == 0
 
 
 def is_wallet_id_invalid(wallet_id: str) -> bool: