From 4ae61dc4e1dcca6ae24131fcd9acc55124e3c0af Mon Sep 17 00:00:00 2001 From: Christophe Besson Date: Fri, 9 Oct 2026 12:16:51 +0200 Subject: feat: let the operator purge a group's chat (MNP 6.1) Signed chat_purge from the Chat settings deletes every stored message; epoch keys and attachments stay. The ack is broadcast so open chat panels empty. Co-Authored-By: Claude Opus 5.5 --- .../src/meshbay_node/transport/webrtc/admin.py | 2 ++ .../src/meshbay_node/transport/webrtc/chat.py | 41 +++++++++++++++++++++- .../src/meshbay_node/transport/webrtc/dispatch.py | 1 + 3 files changed, 43 insertions(+), 1 deletion(-) (limited to 'packages/meshbay-node/src/meshbay_node/transport/webrtc') diff --git a/packages/meshbay-node/src/meshbay_node/transport/webrtc/admin.py b/packages/meshbay-node/src/meshbay_node/transport/webrtc/admin.py index 48734ab..7b3b1c9 100644 --- a/packages/meshbay-node/src/meshbay_node/transport/webrtc/admin.py +++ b/packages/meshbay-node/src/meshbay_node/transport/webrtc/admin.py @@ -15,6 +15,7 @@ from meshbay_common.adminop import ( OP_CHAT_DIRECTORY, OP_CHAT_EPOCH, OP_CHAT_LINK_PREVIEW, + OP_CHAT_PURGE, OP_DIR_DELETE, OP_FILE_DELETE, OP_INVITE_CANCEL, @@ -68,6 +69,7 @@ _ADMIN_EXECUTORS = { OP_CHAT_LINK_PREVIEW: "_admin_exec_chat_link_preview", OP_SEARCH_LISTED: "_admin_exec_search_listed", OP_CHAT_EPOCH: "_admin_exec_chat_epoch", + OP_CHAT_PURGE: "_admin_exec_chat_purge", OP_ROOT_EJECT: "_admin_exec_root_eject", OP_ROOT_PLUG: "_admin_exec_root_plug", } diff --git a/packages/meshbay-node/src/meshbay_node/transport/webrtc/chat.py b/packages/meshbay-node/src/meshbay_node/transport/webrtc/chat.py index dc43ae2..f200884 100644 --- a/packages/meshbay-node/src/meshbay_node/transport/webrtc/chat.py +++ b/packages/meshbay-node/src/meshbay_node/transport/webrtc/chat.py @@ -7,7 +7,12 @@ import time import blake3 from meshbay_common import MNP_VERSION -from meshbay_common.adminop import OP_CHAT_DIRECTORY, OP_CHAT_EPOCH, OP_CHAT_LINK_PREVIEW +from meshbay_common.adminop import ( + OP_CHAT_DIRECTORY, + OP_CHAT_EPOCH, + OP_CHAT_LINK_PREVIEW, + OP_CHAT_PURGE, +) from meshbay_common.chatbox import NONCE_LEN as CHAT_NONCE_LEN from meshbay_common.chatbox import SIG_LEN as CHAT_SIG_LEN from meshbay_common.groupbox import PURPOSE_CHAT_KEYS, seal @@ -227,6 +232,40 @@ class ChatMixin: self._broadcast_to_group({"type": MNP.CHAT_EPOCH_ACK, "v": MNP_VERSION, "epoch": result["epoch"]}) + def _do_chat_purge(self, msg: dict) -> None: + """ + Delete the group's stored chat. Operator only, and signed. The subject is + the group id, so a signature for one group's purge purges no other. + + Always this connection's group, never one named in the message: the ack + is broadcast to this group, and an operator purges the chat they see. + """ + group_id = self._group_id + if not group_id: + self._send({"type": "error", "detail": "No group on this connection"}) + return + if not self._has_admin_authority(): + self._send({"type": "error", "detail": "No authorized key for this"}) + return + self._issue_admin_challenge(OP_CHAT_PURGE, group_id, group_id=group_id) + + async def _admin_exec_chat_purge( + self, pending: dict, transcript: bytes, sig: bytes, + ) -> None: + if not await self._verify_admin_sig(transcript, sig): + self._send({"type": "error", "detail": "Signature verification failed"}) + self._audit("admin_auth_failed", f"chat_purge:{pending['subject'][:8]}") + return + try: + result = await self._run_op(ops.purge_chat, pending["subject"]) + except ops.OpError as e: + self._send({"type": "error", "detail": e.message}) + return + self._audit("chat_purge", str(result["removed"])) + # Every open chat panel empties, not only the operator's. + self._broadcast_to_group({"type": MNP.CHAT_PURGE_ACK, + "v": MNP_VERSION, "removed": result["removed"]}) + async def _do_chat_keys_req(self, msg: dict) -> None: """ Hand this member every chat epoch key the group has, sealed. diff --git a/packages/meshbay-node/src/meshbay_node/transport/webrtc/dispatch.py b/packages/meshbay-node/src/meshbay_node/transport/webrtc/dispatch.py index a8b5767..5d4ed94 100644 --- a/packages/meshbay-node/src/meshbay_node/transport/webrtc/dispatch.py +++ b/packages/meshbay-node/src/meshbay_node/transport/webrtc/dispatch.py @@ -56,6 +56,7 @@ _HANDLERS = { MNP.CHAT_LINK_PREVIEW: ("_do_chat_link_preview", INLINE), MNP.SEARCH_LISTED: ("_do_search_listed", INLINE), MNP.CHAT_EPOCH: ("_do_chat_epoch", INLINE), + MNP.CHAT_PURGE: ("_do_chat_purge", INLINE), MNP.CHAT_KEYS_REQ: ("_do_chat_keys_req", SPAWNED), MNP.GROUP_ROSTER_REQ: ("_do_group_roster_req", SPAWNED), MNP.MEDIA_META_REQ: ("_do_media_meta_request", SPAWNED), -- cgit v1.2.3