Read channel send restriction

Operation boundary

Caller: Trusted backend only
Scope: Restriction for the actual source Channel; person IDs must be canonical and CMD-derived keys are invalid; login, receiving and protocol ACKs remain allowed.
Success: Reads current Channel Slot authority; a missing person Channel returns allow/version 0, a missing non-person Channel returns 404.
Recovery: On 503, keep the policy unknown and retry reads with backoff; unavailable authority is not evidence of allow.

GET/channel/send_ban

Read one current Slot-owned send policy without returning credentials.

Query Parameters

channel_id*string

Actual source Channel ID, at most 1024 UTF-8 bytes; person IDs must be canonical and CMD-derived IDs are rejected.

Match^\S(?:[\s\S]*\S)?$

Length1 <= length <= 1024

channel_type*integer

Source Channel type; 1 denotes a canonical person Channel, 2 a group.

Range1 <= value <= 255

{  "status": 200,  "data": {    "channel_id": "string",    "channel_type": 1,    "send_ban": 0,    "send_ban_version": "string"  }}