['required', 'string', 'max:191'], 'transaction_time' => ['required', 'date'], 'fund_type' => ['required', 'string', 'max:50'], 'flow_type' => ['nullable', 'string', 'max:100'], 'transaction_amount' => ['required', 'numeric'], 'balance' => ['nullable', 'numeric'], 'transaction_summary' => ['nullable', 'string', 'max:1000'], ]; } }