Manually mark dialog as unread
boolFalse#bc799737 = Bool;
boolTrue#997275b5 = Bool;
---functions---
messages.markDialogUnread#c286d98f flags:# unread:flags.0?true peer:InputDialogPeer = Bool;| Name | Type | Description | 
|---|---|---|
| flags | # | Flags, see TL conditional fields | 
| unread | flags.0?true | Mark as unread/read | 
| parent_peer | flags.1?InputPeer | If set, must be equal to the ID of a monoforum, and will affect the monoforum topic passed in peer. | 
| peer | InputDialogPeer | Dialog | 
| Code | Type | Description | 
|---|---|---|
| 400 | PEER_ID_INVALID | The provided peer id is invalid. | 
Telegram supports direct messages to channels, which can also be used to suggest (even paid) channel posts.