v0.12.0

N.B. This release requires a homeserver with Matrix v1.1 support, which bumps up the minimum homeserver versions to Synapse 1.54 and Dendrite 0.8.7. Minimum Conduit version remains at 0.4.0.

Added

• Added provisioning API for resolving Telegram identifiers (like usernames).
• Added support for bridging Telegram custom emojis to Matrix.
• Added option to not bridge chats with lots of members.
• Added option to include captions in the same message as the media to implement MSC2530. Sending captions the same way is also supported and enabled by default.
• Added commands to kick or ban relaybot users from Telegram.
• Added support for Telegram's disappearing messages.
• Added support for bridging forwarded messages as forwards on Telegram.
  • Forwarding is not allowed in relay mode as the bot wouldn't be able to specify who sent the message.
  • Matrix doesn't have real forwarding (there's no forwarding metadata), so only messages bridged from Telegram can be forwarded.
  • Double puppeted messages from Telegram currently can't be forwarded without removing the fi.mau.double_puppet_source key from the content.
  • If forwarding fails (e.g. due to it being blocked in the source chat), the bridge will automatically fall back to sending it as a normal new message.
• Added options to make encryption more secure.
  • The encryption -> verification_levels config options can be used to make the bridge require encrypted messages to come from cross-signed devices, with trust-on-first-use validation of the cross-signing master key.
  • The encryption -> require option can be used to make the bridge ignore any unencrypted messages.
  • Key rotation settings can be configured with the encryption -> rotation config.

Improved

• Improved handling the bridge user leaving chats on Telegram, and new users being added on Telegram.
• Improved animated sticker conversion options: added support for animated webp and added option to convert video stickers (webm) to the specified image format.
• Audio and video metadata is now bridged properly to Telegram.
• Added database index on Telegram usernames (used when bridging username @-mentions in messages).
• Changed /login/send_code provisioning API to return a proper error when the phone number is not registered on Telegram.
  • The same login code can be used for registering an account, but registering is not currently supported in the provisioning API.
• Removed plaintext_highlights config option (the code using it was already removed in v0.11.0).
• Enabled appservice ephemeral events by default for new installations.
  • Existing bridges can turn it on by enabling ephemeral_events and disabling sync_with_custom_puppets in the config, then regenerating the registration file.
• Updated to API layer 144 so that Telegram would send new message types like premium stickers to the bridge.
• Updated Docker image to Alpine 3.16 and made it smaller.

Fixed

• Fixed command prefix in game and poll messages (thanks to @cynhr in #804).