> ## Documentation Index
> Fetch the complete documentation index at: https://doc.va777.net/llms.txt
> Use this file to discover all available pages before exploring further.

# Continuous polling

> How to poll v1 bet records continuously without gaps.

## Polling bet records continuously

When you poll [List bet records](https://doc.va777.net/en/v1/api-reference/betlog/list-by-time.md) or [List historical bet records](https://doc.va777.net/en/v1/api-reference/betlog/history/list-by-time.md) over consecutive time ranges for records and reconciliation, **make each query's start time equal to the previous query's end time** so no records are missed.

Polling 1 minute at a time:

| Query | Start time | End time |
| - | - | - |
| 1 | `2025-12-01T00:00:00.000+08:00` | `2025-12-01T00:01:00.000+08:00` |
| 2 | `2025-12-01T00:01:00.000+08:00` | `2025-12-01T00:02:00.000+08:00` |
| 3 | `2025-12-01T00:02:00.000+08:00` | `2025-12-01T00:03:00.000+08:00` |

> [!WARNING]
>
> With this approach, bets within less than 1 millisecond of the boundary between two queries can be returned twice. Remove duplicates on your side.


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