# InputMessageReadMetric

Read metric for a single message exposure, describing how long the message was visible in the chat viewport.

```tl
inputMessageReadMetric#402b4495 msg_id:int view_id:long time_in_view_ms:int active_time_in_view_ms:int height_to_viewport_ratio_permille:int seen_range_ratio_permille:int = InputMessageReadMetric;
```

### Constructors

| Constructor | Description |
| --- | --- |
| [inputMessageReadMetric](/constructor/inputMessageReadMetric.md) | Read metric for a single message exposure, describing how long the message was visible in the chat viewport