I set up the Meta Bridge for Facebook Messenger using double puppeting, running both the bridge and my Synapse Matrix home server in Docker containers. However, I'm facing an issue when trying to send messages to users who turned on the new end-to-end encryption in Messenger. On the flip side, I can still chat with users who haven't enabled this encryption feature. Since I couldn't find anything about this in the documentation, I'm reporting it as a bug.

Please find the relevant logs below:

2024-01-29T11:37:50Z DBG decode.go:129:Decode() > Facebook server log: Write error response from server global_log=true

2024-01-29T11:37:50Z WRN decode.go:210:handleStoredProcedure() > Failed to set int64 field_index=2 field_name=TaskValue global_log=true struct_name=LSIssueNewTask val="{\"force_upsert\":false,\"use_open_messenger_transport\":false,\"metadata_only\":false,\"preview_only\":false,\"thread_fbid\":6...8,\"sync_group\":95}" val_type=string

2024-01-29T11:37:50Z TRC Meta send response action="handle matrix event" event_id=$K9wbrRtuloOAI39TPCThcy2jAJbVf7bbmGuE6wTzFkY event_type=m.room.message response={"LSIssueNewTask":[{"Context":209,"QueueName":"invalid_send_task_queue","Unrecognized":{"10":0,"2":"{\"force_upsert\":false,\"use_open_messenger_transport\":false,\"metadata_only\":false,\"preview_only\":false,\"thread_fbid\":6...8,\"sync_group\":95}"}}],"LSMailboxTaskCompletionApiOnTaskCompletion":[{"TaskId":73}],"LSMarkOptimisticMessageFailed":[{"Message":"Couldn't send.","OTID":"7157698346855956522"}],"LSRemoveTask":[{"TaskId":74}],"LSTaskExists":[{"TaskId":73},{"TaskId":73},{"TaskId":73},{"TaskId":73},{"TaskId":73},{"TaskId":73},{"TaskId":73},{"TaskId":74},{"TaskId":74}],"LSUpdateMessagesOptimisticContext":[{"Unrecognized":{"0":73}}],"LSUpdateSubscriptErrorMessage":[{"Message":"Couldn't send.","OTID":"7157698346855956522","ThreadKey":100009247374828}],"LSUpdateThreadSnippet":[{"IsAdminSnippet":true,"Snippet":"Message failed to send","ThreadKey":100009247374828,"Unrecognized":{"7":false}}],"LSWriteCTAIdToThreadsTable":[{"ThreadKey":100009247374828}]} thread_id=100009247374828 thread_receiver=1...1

2024-01-29T11:37:50Z WRN Sending message failed action="handle matrix event" event_id=$K9wbrRtuloOAI39TPCThcy2jAJbVf7bbmGuE6wTzFkY event_type=m.room.message thread_id=100009247374828 thread_receiver=1...1

2024-01-29T11:37:50Z ERR Sending message metrics for event error="server rejected message: Couldn't send." event_id=$K9wbrRtuloOAI39TPCThcy2jAJbVf7bbmGuE6wTzFkY event_type=m.room.message handling_step="Error sending" sender=@username:matrix.server.name thread_id=100009247374828 thread_receiver=1...1

2024-01-29T11:37:50Z DBG Sent message checkpoint message_checkpoint={"event_id":"$K9wbrRtuloOAI39TPCThcy2jAJbVf7bbmGuE6wTzFkY","event_type":"m.room.message","info":"server rejected message: Couldn't send.","message_type":"m.text","reported_by":"BRIDGE","retry_num":0,"room_id":"!vUTGHXtXdWONcrTDFL:matrix.server.name","status":"UNSUPPORTED","step":"REMOTE","timestamp":1706528270047}

2024-01-29T11:37:50Z DBG Request completed duration=65.162364 event_id=$K9wbrRtuloOAI39TPCThcy2jAJbVf7bbmGuE6wTzFkY event_type=m.room.message handling_step="Error sending" method=PUT req_body={"typing":false} req_id=2785 response_length=2 response_mime=application/json sender=@username:matrix.server.name status_code=200 thread_id=100009247374828 thread_receiver=1...1 url=http://matrixserver:8008/_matrix/client/v3/rooms/%21vUTGHXtXdWONcrTDFL:matrix.server.name/typing/@facebook_1...8:matrix.server.name?user_id=%40facebook_1...8%3Amatrix.server.name

2024-01-29T11:37:50Z DBG Request completed action="handle meta read receipt" duration=63.017916 method=POST read_at_ms=1706528270047 read_up_to_ms=1706528269495 req_body={"com.beeper.fully_read.extra":{"fi.mau.double_puppet_source":"mautrix-meta"},"com.beeper.read.extra":{"fi.mau.double_puppet_source":"mautrix-meta"},"m.fully_read":"$1EAN-dN4q2dzjPRK4Sg8OZU8slI_4EutEADpG9vp3bk","m.read":"$1EAN-dN4q2dzjPRK4Sg8OZU8slI_4EutEADpG9vp3bk"} req_id=2786 response_length=2 response_mime=application/json sender_id=1...1 status_code=200 thread_id=100009247374828 thread_receiver=1...1 url=http://matrixserver:8008/_matrix/client/v3/rooms/%21vUTGHXtXdWONcrTDFL:matrix.server.name/read_markers?user_id=%40username%3Amatrix.server.name

2024-01-29T11:37:50Z DBG Sent read receipt to Matrix action="handle meta read receipt" event_id=$1EAN-dN4q2dzjPRK4Sg8OZU8slI_4EutEADpG9vp3bk read_at_ms=1706528270047 read_up_to_ms=1706528269495 sender_id=1...1 thread_id=100009247374828 thread_receiver=1...1

2024-01-29T11:37:50Z DBG Starting handling of transaction content={"pdu":0,"unstable_edu":3,"unstable_to_device":0} transaction_id=1701

2024-01-29T11:37:50Z DBG Finished dispatching events from transaction transaction_id=1701

2024-01-29T11:37:50Z DBG Request completed duration=185.698493 event_id=$K9wbrRtuloOAI39TPCThcy2jAJbVf7bbmGuE6wTzFkY event_type=m.room.message handling_step="Error sending" method=PUT req_body={"body":"\u003e \u003c@username:matrix.server.name\u003e Test 123 Test\n\n⚠ Your message was not bridged: server rejected message: Couldn't send.","format":"org.matrix.custom.html","formatted_body":"\u003cmx-reply\u003e\u003cblockquote\u003e\u003ca href=\"https://matrix.to/#/!vUTGHXtXdWONcrTDFL:matrix.server.name/$K9wbrRtuloOAI39TPCThcy2jAJbVf7bbmGuE6wTzFkY\"\u003eIn reply to\u003c/a\u003e \u003ca href=\"https://matrix.to/#/@username:matrix.server.name\"\u003e@username:matrix.server.name\u003c/a\u003e\u003cbr\u003eTest 123 Test\u003c/blockquote\u003e\u003c/mx-reply\u003e⚠ Your message was not bridged: server rejected message: Couldn\u0026#39;t send.","m.relates_to":{"m.in_reply_to":{"event_id":"$K9wbrRtuloOAI39TPCThcy2jAJbVf7bbmGuE6wTzFkY"}},"msgtype":"m.notice"} req_id=2787 response_length=59 response_mime=application/json sender=@username:matrix.server.name status_code=200 thread_id=100009247374828 thread_receiver=1...1 url=http://matrixserver:8008/_matrix/client/v3/rooms/%21vUTGHXtXdWONcrTDFL:matrix.server.name/send/m.room.message/mautrix-go_1706528270115250745_18?user_id=%40facebook_1...8%3Amatrix.server.name

2024-01-29T11:37:50Z DBG Timings for event event_id=$K9wbrRtuloOAI39TPCThcy2jAJbVf7bbmGuE6wTzFkY event_type=m.room.message handling_step="Error sending" sender=@username:matrix.server.name thread_id=100009247374828 thread_receiver=1...1 timings={"bridge":{"decrypt":"0s","init_receive":"197.8ms","queue":"0s","total_hs_to_portal":"198.8ms"},"portal":{"convert":"9.222µs","implicit_rr":"93ns","preproc":"182.443µs","total_send":"0s"}}

2024-01-29T11:37:50Z DBG Starting handling of transaction content={"pdu":1,"unstable_edu":0,"unstable_to_device":0} transaction_id=1703

2024-01-29T11:37:50Z DBG Finished dispatching events from transaction transaction_id=1703

2024-01-29T11:37:50Z DBG Sent message checkpoint message_checkpoint={"event_id":"$MnfCtuY2-ZblUfaiywgMxRUliYMlkjYIPLSnMUkDe_4","event_type":"m.room.message","message_type":"m.notice","reported_by":"BRIDGE","retry_num":0,"room_id":"!vUTGHXtXdWONcrTDFL:matrix.server.name","status":"SUCCESS","step":"BRIDGE","timestamp":1706528270347}

2024-01-29T11:37:51Z DBG Starting handling of transaction content={"pdu":0,"unstable_edu":1,"unstable_to_device":0} transaction_id=1704

2024-01-29T11:37:51Z DBG Finished dispatching events from transaction transaction_id=1704

2024-01-29T11:37:51Z DBG Creating task component=messagix label=21 payload={"last_read_watermark_ts":1706528271296,"sync_group":1,"thread_id":100009247374828} queueName=100009247374828 taskId=75 user_id=@username:matrix.server.name

2024-01-29T11:37:51Z DBG Updating sync groups LSExecuteFirstBlockForSyncTransaction=[{"CurrentCursor":"HCwAABbUmK4BFrKk7asGEwUWiuiVvuu8LQA","DatabaseId":1,"EpochId":7157693973903966250,"NextCursor":"HCwAABbWmK4BFrKk7asGEwUWiuiVvuu8LQA","SyncChannel":1,"SyncStatus":2}] LSUpsertSyncGroupThreadsRange=null component=messagix user_id=@username:matrix.server.name

2024-01-29T11:37:51Z INF Updated database by transaction... component=messagix database_id=1 new_cursor=HCwAABbWmK4BFrKk7asGEwUWiuiVvuu8LQA sendSyncParams=false syncChannel=1 user_id=@username:matrix.server.name

2024-01-29T11:37:51Z TRC Got new event table={"LSExecuteFinallyBlockForSyncTransaction":[{"EpochId":7157693973903966250,"SyncDatabaseId":1}],"LSExecuteFirstBlockForSyncTransaction":[{"CurrentCursor":"HCwAABbUmK4BFrKk7asGEwUWiuiVvuu8LQA","DatabaseId":1,"EpochId":7157693973903966250,"NextCursor":"HCwAABbWmK4BFrKk7asGEwUWiuiVvuu8LQA","SyncChannel":1,"SyncStatus":2}],"LSMarkThreadRead":[{"LastReadWatermarkTimestampMs":1706528271296,"ThreadKey":100009247374828}],"LSUpdateParentFolderReadWatermark":[{"ThreadKey":100009247374828,"Unrecognized":{"1":{"all_read":"","unread_plural":" nieuwe chatberichten","unread_singular":" nieuw chatbericht"}}}],"LSUpsertSequenceId":[{"LastAppliedMailboxSequenceId":1426987}],"LSWriteCTAIdToThreadsTable":[{"ThreadKey":100009247374828}]} user_id=@username:matrix.server.name

2024-01-29T11:37:51Z DBG Request completed action="handle meta read receipt" duration=25.939217 method=POST read_at_ms=1706528271797 read_up_to_ms=1706528271296 req_body={"com.beeper.fully_read.extra":{"fi.mau.double_puppet_source":"mautrix-meta"},"com.beeper.read.extra":{"fi.mau.double_puppet_source":"mautrix-meta"},"m.fully_read":"$1EAN-dN4q2dzjPRK4Sg8OZU8slI_4EutEADpG9vp3bk","m.read":"$1EAN-dN4q2dzjPRK4Sg8OZU8slI_4EutEADpG9vp3bk"} req_id=2788 response_length=2 response_mime=application/json sender_id=1...1 status_code=200 thread_id=100009247374828 thread_receiver=1...1 url=http://matrixserver:8008/_matrix/client/v3/rooms/%21vUTGHXtXdWONcrTDFL:matrix.server.name/read_markers?user_id=%40username%3Amatrix.server.name

2024-01-29T11:37:51Z DBG Sent read receipt to Matrix action="handle meta read receipt" event_id=$1EAN-dN4q2dzjPRK4Sg8OZU8slI_4EutEADpG9vp3bk read_at_ms=1706528271797 read_up_to_ms=1706528271296 sender_id=1...1 thread_id=100009247374828 thread_receiver=1...1

2024-01-29T11:37:52Z TRC Read receipt send response action="handle matrix receipt" event_id=$MnfCtuY2-ZblUfaiywgMxRUliYMlkjYIPLSnMUkDe_4 response={"LSRemoveTask":[{"TaskId":75}],"LSTaskExists":[{"TaskId":75},{"TaskId":75}],"LSWriteCTAIdToThreadsTable":[{"ThreadKey":100009247374828}]} thread_id=100009247374828 thread_receiver=1...1

2024-01-29T11:37:52Z DBG Read receipt sent action="handle matrix receipt" event_id=$MnfCtuY2-ZblUfaiywgMxRUliYMlkjYIPLSnMUkDe_4 read_watermark=2024-01-29T11:37:51.296Z thread_id=100009247374828 thread_receiver=1...1

2024-01-29T11:37:56Z TRC Got ping response component=messagix user_id=@username:matrix.server.name

Thank you for your attention to this matter. I am happy to provide any further information or clarification needed to resolve this issue. I appreciate the efforts put into developing and maintaining this integration.

It's not a bug. Encryption will be supported eventually

• a459d342 Add support for incoming profile share messages
• dd29ed96 Try adding support for connecting via messenger.com or fb tor
• 687ecaf1 Add proxy support

In reply to @surak:gnomos.org
I'm also interested in this, I just had to reactivate my fb account and now I feel dirty

In reply to @tulir:maunium.net
messenger might work now if you set the mode in the config appropriately

In reply to @tulir:maunium.net
I didn't actually test it so let me know if you do test

In reply to @cos:hacklab.fi
looks like the bridge doesn't handle leaving chats properly. bridge restart sucks user back into them.

Which would need using the actual FB or Messenger side ;)

While I think too that leaving chat in Matrix side should.. well.. either leave the chat in FB side too, or do some other means to not just come back...

Maybe some happy middleground would be !fb leave-chat or whatever would be called to cater both ignorant user pampering and actually wanting to just leave the damn thing? =)