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EphemeralMessagesBot/README.md
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# EphemeralMessagesBot
Demonstrates ephemeral messages: group messages that Telegram shows only to one receiver.
Demonstrates Telegram Bot API 10.2 and 10.3 ephemeral messages: group messages that Telegram shows only to one receiver.
## Behavior
- `/ephemeral` replies with a **Reveal a secret** inline button. The command is registered with Telegram as
an ephemeral command.
- Pressing the button (`reveal` callback data) sends a personal message visible only to the user who
pressed it. After three seconds the bot edits the message, then deletes it three seconds later.
- Pressing the button (`reveal` callback data) uses `EphemeralMessageParameters` to replace the callback-query
message with a personal rich message visible only to the user who pressed it. After three seconds the bot replaces
its text with typed rich blocks, then deletes it three seconds later.
- `/ephemeral_photo` waits for a photo from the same user and chat, sends it back ephemerally by its Telegram file ID,
downloads it, and edits the ephemeral media using a new multipart upload. A second edit sets
`showCaptionAboveMedia = true`.
- `/ephemeral_live_photo` waits for a Live Photo, sends it ephemerally by existing file IDs, then downloads and
re-uploads both its main file and secondary `photo` file in one `editEphemeralMessageMedia` request. This exercises
ktgbotapi 37.0.0's secondary multipart attachment collection.
- When the bot receives an ephemeral content message, it sends two ephemeral replies: one through the
general `reply` API and one through the explicit `replyToEphemeral` API.
general `reply` API and one through the explicit `replyToEphemeral` API. The explicit form also uses
`EphemeralMessageParameters`.
- Updates and basic bot information are printed to standard output.
## Setup
Create a bot token, keep it secret, and add the bot to a group. The bot must be allowed to send messages
there; this example does not request or validate group permissions itself. Use a Telegram environment that
supports ephemeral messages.
supports ephemeral messages. The photo demonstrations download all selected media into memory before uploading it
again.
## Run