How to parse error messages?

[0xgautam]

I am using the RPC client for one of my projects that use the Jupiter Swap API.

I am getting the following transaction error when executing a swap

SendTransactionPreflightFailureMessage { message: "Transaction simulation failed: Error processing Instruction 6: custom program error: 0x1771", data: RpcSimulateTransactionResult(RpcSimulateTransactionResult { err: Some(InstructionError(6, Custom(6001))), logs: Some(["Program ComputeBudget111111111111111111111111111111 invoke [1]", "Program ComputeBudget111111111111111111111111111111 success", "Program ComputeBudget111111111111111111111111111111 invoke [1]", "Program ComputeBudget111111111111111111111111111111 success", "Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL invoke [1]", "Program log: CreateIdempotent", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]", "Program log: Instruction: GetAccountDataSize", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 1569 of 1394295 compute units", "Program return: TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA pQAAAAAAAAA=", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program 11111111111111111111111111111111 invoke [2]", "Program 11111111111111111111111111111111 success", "Program log: Initialize the associated token account", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]", "Program log: Instruction: InitializeImmutableOwner", "Program log: Please upgrade to SPL Token 2022 for immutable owner support", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 1405 of 1387708 compute units", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]", "Program log: Instruction: InitializeAccount3", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 3158 of 1383826 compute units", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL consumed 19315 of 1399700 compute units", "Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL success", "Program 11111111111111111111111111111111 invoke [1]", "Program 11111111111111111111111111111111 success", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [1]", "Program log: Instruction: SyncNative", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 3045 of 1380235 compute units", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL invoke [1]", "Program log: CreateIdempotent", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]", "Program log: Instruction: GetAccountDataSize", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 1569 of 1367285 compute units", "Program return: TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA pQAAAAAAAAA=", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program 11111111111111111111111111111111 invoke [2]", "Program 11111111111111111111111111111111 success", "Program log: Initialize the associated token account", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]", "Program log: Instruction: InitializeImmutableOwner", "Program log: Please upgrade to SPL Token 2022 for immutable owner support", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 1405 of 1360698 compute units", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]", "Program log: Instruction: InitializeAccount3", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 4188 of 1356816 compute units", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL consumed 24845 of 1377190 compute units", "Program ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL success", "Program JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4 invoke [1]", "Program log: Instruction: SharedAccountsRoute", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [2]", "Program log: Instruction: Transfer", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 4735 of 1349101 compute units", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program whirLbMiicVdio4qvUfM5KAg6Ct8VwpYzGff3uctyCc invoke [2]", "Program log: Instruction: SwapV2", "Program log: fee_growth: 1362940586679331", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [3]", "Program log: Instruction: TransferChecked", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 6238 of 1288958 compute units", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA invoke [3]", "Program log: Instruction: TransferChecked", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA consumed 6147 of 1278758 compute units", "Program TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA success", "Program whirLbMiicVdio4qvUfM5KAg6Ct8VwpYzGff3uctyCc consumed 70419 of 1340206 compute units", "Program whirLbMiicVdio4qvUfM5KAg6Ct8VwpYzGff3uctyCc success", "Program JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4 invoke [2]", "Program JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4 consumed 182 of 1268035 compute units", "Program JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4 success", "Program JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4 consumed 86118 of 1352345 compute units", "Program JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4 failed: custom program error: 0x1771"]), accounts: None, units_consumed: Some(133773), return_data: None, inner_instructions: None }) }

I know that this is a slippage tolerance issue based on Jupiter Swap docs. However I am not sure how to parse this and get the error message in the code.

My code currently looks like this:

async def execute_swap_trade(swap_data: dict, wallet_keypair: Keypair, client: Client):
    """Execute swap trade with Jupiter API."""
    print("Executing swap trade...")
    success, tx_id, error = await sign_and_send_transaction(
        swap_data, wallet_keypair, client)

    print(f"Success: {success}, tx_id: {tx_id}, error: {error}")

    tx_status, tx_err = check_transaction_status(client, tx_id)

    if tx_err:
        print(f"Transaction error: {tx_err}")
        raise Exception(tx_err)
    return tx_status, tx_id, tx_err

def check_transaction_status(client: Client, tx_id: str) -> bool:
    # Get the transaction
    tx = client.get_transaction(tx_sig=Signature.from_string(
        tx_id), max_supported_transaction_version=0)

    if tx.value.transaction.meta.err is not None:
        if tx.value.transaction.meta.err.InsufficientFundsForFee:
            print("Insufficient funds for fee")
            return False, "Insufficient funds for fee. Please top up your account."

        return False, tx.value.transaction.meta.err

    return True, None

Is there a way I can get the error message?

Thanks!