Read metric for a single message exposure, describing how long the message was visible in the chat viewport.
Constructor schema is available as of layer 224. Switch »| Name | Type | Description |
|---|---|---|
| msg_id | int | ID of the message |
| view_id | long | Random non-zero 64-bit ID generated for this exposure |
| time_in_view_ms | int | Total exposure time in milliseconds of at least one pixel of the message, after the 300 ms entry grace period |
| active_time_in_view_ms | int | Part of time_in_view_ms accumulated while the user is active |
| height_to_viewport_ratio_permille | int | round(max_message_height * 1000 / max_viewport_height), may exceed 1000 when the message is taller than the viewport |
| seen_range_ratio_permille | int | round(max_seen_vertical_range * 1000 / max_message_height), clamped to the 0–1000 range |