Get chat history request
| Name | Type | Description | Notes |
|---|---|---|---|
| Txid | int | Order ID; omit or `0` to return the latest order with chat for the user. | [optional] |
| Lastreceived | int | Timestamp of the last received message for backward incremental fetch; omit on first load. | [optional] |
| Firstreceived | int | Timestamp of first received message for paging backward; omit on first load. | [optional] |