Fix buy/sell transactions silently failing on-chain

bots/bot-sniper-1-geyser.yaml

@@ -63,7 +63,7 @@ compute_units:
   # Note: Savings don't show in "consumed CU" but improve tx priority/cost.
   # Note (Nov 23, 2025): with data size set to 512KB, transactions fail - increasing to 12.5MB resolves the issue.
   # Reference: https://www.anza.xyz/blog/cu-optimization-with-setloadedaccountsdatasizelimit
-  account_data_size: 12_500_000
+  # account_data_size: 12_500_000  # Disabled: causes MaxLoadedAccountsDataSizeExceeded with Token-2022
 
 # Filters for token selection
 filters:

bots/bot-sniper-2-logs.yaml

@@ -63,7 +63,7 @@ compute_units:
   # Note: Savings don't show in "consumed CU" but improve tx priority/cost.
   # Note (Nov 23, 2025): with data size set to 512KB, transactions fail - increasing to 12.5MB resolves the issue.
   # Reference: https://www.anza.xyz/blog/cu-optimization-with-setloadedaccountsdatasizelimit
-  account_data_size: 12_500_000
+  # account_data_size: 12_500_000  # Disabled: causes MaxLoadedAccountsDataSizeExceeded with Token-2022
 
 # Filters for token selection
 filters:

bots/bot-sniper-3-blocks.yaml

@@ -63,7 +63,7 @@ compute_units:
   # Note: Savings don't show in "consumed CU" but improve tx priority/cost.
   # Note (Nov 23, 2025): with data size set to 512KB, transactions fail - increasing to 12.5MB resolves the issue.
   # Reference: https://www.anza.xyz/blog/cu-optimization-with-setloadedaccountsdatasizelimit
-  account_data_size: 12_500_000
+  # account_data_size: 12_500_000  # Disabled: causes MaxLoadedAccountsDataSizeExceeded with Token-2022
 
 # Filters for token selection
 filters:

bots/bot-sniper-4-pp.yaml

@@ -61,7 +61,7 @@ compute_units:
   # Note: Savings don't show in "consumed CU" but improve tx priority/cost.
   # Note (Nov 23, 2025): with data size set to 512KB, transactions fail - increasing to 12.5MB resolves the issue.
   # Reference: https://www.anza.xyz/blog/cu-optimization-with-setloadedaccountsdatasizelimit
-  account_data_size: 12_500_000
+  # account_data_size: 12_500_000  # Disabled: causes MaxLoadedAccountsDataSizeExceeded with Token-2022
 
 # Filters for token selection
 filters:

src/core/client.py

@@ -280,26 +280,41 @@ async def build_and_send_transaction(
     async def confirm_transaction(
         self, signature: str, commitment: str = "confirmed"
     ) -> bool:
-        """Wait for transaction confirmation.
+        """Wait for transaction confirmation and verify execution success.
+
+        Confirms the transaction landed on-chain, then checks meta.err to
+        ensure the inner program instructions actually succeeded. A transaction
+        can be "confirmed" (included in a block) but still fail execution.
 
         Args:
             signature: Transaction signature
             commitment: Confirmation commitment level
 
         Returns:
-            Whether transaction was confirmed
+            Whether transaction was confirmed AND executed successfully
         """
         await self._rate_limiter.acquire()
         client = await self.get_client()
         try:
             await client.confirm_transaction(
                 signature, commitment=commitment, sleep_seconds=1
             )
-            return True
         except Exception:
             logger.exception(f"Failed to confirm transaction {signature}")
             return False
 
+        # Verify the transaction actually succeeded (no program errors)
+        result = await self._get_transaction_result(str(signature))
+        if result:
+            tx_err = result.get("meta", {}).get("err")
+            if tx_err:
+                logger.error(
+                    f"Transaction {str(signature)[:16]}... confirmed but failed: {tx_err}"
+                )
+                return False
+
+        return True
+
     async def get_transaction_token_balance(
         self, signature: str, user_pubkey: Pubkey, mint: Pubkey
     ) -> int | None:
@@ -354,6 +369,15 @@ async def get_buy_transaction_details(
             return None, None
 
         meta = result.get("meta", {})
+
+        # Check for transaction execution errors (e.g., MaxLoadedAccountsDataSizeExceeded)
+        tx_err = meta.get("err")
+        if tx_err:
+            logger.error(
+                f"Transaction {signature[:16]}... failed with error: {tx_err}"
+            )
+            return None, None
+
         mint_str = str(mint)
 
         # Get tokens received from pre/post token balance diff

src/trading/platform_aware.py

@@ -156,7 +156,8 @@ async def execute(self, token_info: TokenInfo) -> TradeResult:
                 else:
                     raise ValueError(
                         f"Failed to parse transaction details: tokens={tokens_raw}, "
-                        f"sol_spent={sol_spent}"
+                        f"sol_spent={sol_spent} (tx: {tx_signature}). "
+                        f"The transaction may have failed on-chain — check explorer."
                     )
 
                 return TradeResult(