Add normalization to gossip transaction processing to preserve type field

apps/blockchain-node/src/aitbc_chain/main.py

@@ -102,6 +102,7 @@ class BlockchainNode:
         
         async def process_txs():
             from .mempool import get_mempool
+            from .rpc.router import _normalize_transaction_data
             mempool = get_mempool()
             while True:
                 try:
@@ -110,6 +111,8 @@ class BlockchainNode:
                         import json
                         tx_data = json.loads(tx_data)
                     chain_id = tx_data.get("chain_id", settings.chain_id)
+                    # Normalize transaction data to ensure type field is preserved
+                    tx_data = _normalize_transaction_data(tx_data, chain_id)
                     mempool.add(tx_data, chain_id=chain_id)
                 except Exception as exc:
                     logger.error(f"Error processing transaction from gossip: {exc}")

apps/blockchain-node/src/aitbc_chain/rpc/router.py

@@ -308,7 +308,12 @@ async def submit_transaction(tx_data: TransactionRequest) -> Dict[str, Any]:
             "signature": tx_data.sig
         }
         
+        _logger.info(f"[ROUTER] Submitting transaction: type={tx_data.type}, normalized_type={tx_data_dict.get('type')}")
+        
         tx_data_dict = _normalize_transaction_data(tx_data_dict, chain_id)
+        
+        _logger.info(f"[ROUTER] After normalization: type={tx_data_dict.get('type')}, keys={list(tx_data_dict.keys())}")
+        
         _validate_transaction_admission(tx_data_dict, mempool)
 
         tx_hash = mempool.add(tx_data_dict, chain_id=chain_id)