Truncate Channel

Truncating a channel removes all messages but preserves the channel data and members. To delete both the channel and its messages, use Delete Channel instead.

Truncation can be performed client-side or server-side. Client-side truncation requires the TruncateChannel permission.

On server-side calls, use the user_id field to identify who performed the truncation.

By default, truncation hides messages. To permanently delete messages, set hard_delete to true.

Truncate a Channel

import StreamChat

let controller = client.channelController(for: .init(type: .messaging, id: "general"))

// Controllers

controller.truncateChannel()

// Or with parameters:
controller.truncateChannel(
  skipPush: true,
  hardDelete: true,
  systemMessage: "Dear Everyone. The channel has been truncated."
)

// State layer (async-await)

try await chat.truncate()

// Or with parameters:
try await chat.truncate(
  systemMessage: "Dear Everyone. The channel has been truncated.",
  hardDelete: true,
  skipPush: true
)

Truncate Options

FieldTypeDescriptionOptional
truncated_atDateTruncate messages up to this time
user_idstringUser who performed the truncation (server-side only)
messageobjectA system message to add after truncation
skip_pushboolDo not send a push notification for the system message
hard_deleteboolPermanently delete messages instead of hiding them