Starter Deal! First 3 month from only  $9.9 /month!
Starter Deal! First 3 month from only  $9.9 /month!
Grab It Now 
Chat
  • Web
    • TUIKit
      • Overview
      • Installaton
        • TUIKit
          • Vue
          • React
        • TUIChat Only
          • Vue
      • Features
        • Reactions
        • Read Receipt
        • Typing Status
        • User Online Status
      • Themes
        • Setting UI Styles
          • Web
          • Mobile
      • Customization
        • Customize Messages
      • Localization
    • SDK
      • Install Chat SDK
      • Initialize Chat SDK
      • Login and Logout
      • Client APIs
      • Message
        • Overview
        • Send a Message
        • Receive a Message
        • Historical Message
        • Forward Messages
        • Modify a Message
        • Delete Messages
        • Clear History Message
        • Recall a Message
        • Send an Online Message
        • Message Read Receipt
        • Query Messages
        • Targeted Group Message
        • Do not Notify
        • Key-Value Extensions
        • Translation
      • Conversation
        • Overview
        • Conversation List
        • Get Conversations
        • Unread Count
        • Pin Conversations
        • Delete Conversations
        • Mark
        • Conversation Group
      • Group
        • Overview
        • Group Management
        • Group Profile
        • Group Member Management
        • Group Member Profile
        • Custom Group Attribute
        • Group Counter
      • Community Topic
        • Community Management
      • User Profile and Relationship Chain
        • User Profile
        • User Status
        • Friend Management
        • Friend List
        • Block List
  • Android
    • Run Demo
    • UIKit
      • Overview
      • Getting Started
      • Installation
        • TUIKit
        • TUIChat Only
      • Features
        • Reactions
        • Read Receipt
        • User Online Status
        • Search Messages
      • Customization
        • Customize Messages
        • Customize Emojis and Stickers
      • Localization
    • SDK
      • Install Chat SDK
      • Initialize Chat SDK
      • Login and Logout
      • Message
        • Overview
        • Send a Message
        • Receive a Message
        • Retrieve Messages
        • Forward Messages
        • Modify a Message
        • Insert a Message
        • Delete Messages
        • Clear History Messages
        • Recall a Message
        • Send an Online Message
        • Message Read Receipt
        • Query Messages
        • Metions
        • Targeted Group Message
        • Do not Notify
        • Key-Value Extensions
        • Reactions
        • Translation
        • Pin Messages
      • Conversation
        • Overview
        • Conversation List
        • Get Conversations
        • Unread Count
        • Pin Conversations
        • Delete Conversations
        • Draft
        • Mark
        • Conversation Group
      • Group
        • Overview
        • Manage Group
        • Profile
        • Manage Members
        • Member Profile
        • Attribute
        • Counter
      • Community and Topic
        • Manage Community
        • Permission Group
      • User
        • User Profile
        • User Status
        • Manage Friends
        • Friend Group
        • Block Lists
      • Local Search
        • Search Messages
        • Search Friends
        • Search Groups
        • Search Group Members
      • Signaling
      • API Reference
        • Java
  • iOS and macOS
    • Run Demo
    • UIKit
      • Overview
      • Getting Started
      • Installation
        • TUIKit
        • TUIChat Only
      • Features
        • Reactions
        • Read Receipt
        • User Online Status
        • Search Messages
      • Customization
        • Customize Messages
        • Customize Emojis and Stickers
      • Localization
    • SDK
      • Installation
        • iOS
        • macOS
      • Initialize Chat SDK
      • Login and Logout
      • Message
        • Overview
        • Send a Message
        • Receive a Message
        • Retrieve Messages
        • Forward Messages
        • Modify a Message
        • Insert a Message
        • Delete Messages
        • Clear History Messages
        • Recall a Message
        • Send an Online Message
        • Message Read Receipt
        • Query Messages
        • Metions
        • Targeted Group Messages
        • Do not Notify
        • Key-Value Extensions
        • Reactions
        • Translation
        • Pin Messages
      • Conversation
        • Overview
        • Conversation List
        • Get Conversations
        • Unread Count
        • Pin Conversations
        • Delete Conversations
        • Draft
        • Mark
        • Conversation Group
      • Group
        • Overview
        • Manage Group
        • Profile
        • Manage Members
        • Member Profile
        • Attribute
        • Counter
      • Community and Topic
        • Manage Community
        • Permission Group
      • User
        • User Profile
        • User Status
        • Manage Friends
        • Friend Group
        • Block Lists
      • Local Search
        • Search Messages
        • Search Friends
        • Search Groups
        • Search Group Members
      • Signaling
      • API Reference
        • Swift
        • Objective-C
  • Windows
    • SDK
      • Install Chat SDK
      • Initialize Chat SDK
      • Login and Logout
      • Message
        • Overview
        • Send a Message
        • Receive a Message
        • Retrieve Messages
        • Forward Messages
        • Modify a Message
        • Insert a Message
        • Delete Messages
        • Clear History Messages
        • Recall a Message
        • Send an Online Message
        • Message Read Receipt
        • Query Messages
        • Metions
        • Targeted Group Messages
        • Do not Notify
        • Key-Value Extensions
        • Reactions
        • Translation
        • Pin Messages
      • Conversation
        • Overview
        • Conversation List
        • Get Conversations
        • Unread Count
        • Pin Conversations
        • Delete Conversations
        • Draft
        • Mark
        • Conversation Group
      • Group
        • Overview
        • Manage Group
        • Profile
        • Manage Members
        • Member Profile
        • Attribute
        • Counter
      • Community and Topic
        • Manage Community
        • Permission Group
      • User
        • User Profile
        • User Status
        • Manage Friends
        • Friend Group
        • Block Lists
      • Local Search
        • Search Messages
        • Search Friends
        • Search Groups
        • Search Group Members
      • Signaling
      • API Reference
        • C++
        • C
  • Flutter
    • Run Demo
    • UIKIT
      • Overview
      • Installation
        • integrated
      • Features
        • Local Search
        • Offline Push
        • Online Status
        • Typing Status
        • Message Read Receipt
        • Message Reactions
        • Internationalization
        • Adding Custom Messages
        • Emoji & Stickers
      • Customization
        • Modifying UI Themes
        • Setting UI Styles
    • SDK
      • Install Chat SDK
        • Install
      • Initialize Chat SDK
        • Initialize
      • Login And Logout
        • Login and Logout
      • Message
        • Message Overview
        • Sending Message
        • Receiving Message
        • Historical Message
        • Forwarding Message
        • Modifying Message
        • Message Inserting
        • Deleting Message
        • Clearing Messages
        • Recalling Message
        • Online Message
        • Read Receipt
        • Querying Message
        • Group @ Message
        • Targeted Group Message
        • Notification Muting
        • Message Extension
      • Conversation
        • Conversation Overview
        • Conversation List
        • Getting Conversation
        • Conversation Unread Count
        • Pinning Conversation to the Top
        • Deleting Conversation
        • Conversation Draft
        • Conversation Group
      • Group
        • Group Overview
        • Group Management
        • Group Profile
        • Group Member Management
        • Group Member Profile
        • Custom Group Attribute
      • User
        • User Profile
        • Friend Management
        • Friend List
        • Blocklist
      • Offline Push
        • Offline Push
      • Signaling
        • Signaling Management
      • Local Search
        • Searching for Message
        • Searching for Friend
        • Searching Group
        • Searching for Group Member
      • API Reference
        • Client APIs
  • React Native
    • Run Demo
    • SDK
      • SDK Integration
      • Initialization
      • Login and Logout
      • Message
        • Message Overview
        • Sending Message
        • Receiving Message
        • Historical Message
        • Forwarding Message
        • Modifying Message
        • Message Inserting
        • Deleting Message
        • Clearing Messages
        • Recalling Message
        • Online Message
        • Read Receipt
        • Querying Message
        • Group @ Message
        • Targeted Group Message
        • Notification Muting
        • Message Extension
      • Group
        • Overview
        • Group Management
        • Group Profile
        • Group Member Management
        • Group Member Profile
        • Custom Group Attribute
        • Community Management
      • User
        • User Profile
        • Friend Management
        • Friend List
        • Blocklist
      • Offline Push
        • Offline Push
      • Local Search
        • Searching for Message
        • Searching for Friend
        • Searching Group
        • Searching for Group Member
      • Signaling
        • Signaling Management
  • Unity(Game Solution)
    • Run Demo
    • SDK
      • SDK Integration
      • Initialization
      • Login and Logout
      • Message
        • Message Overview
        • Sending Message
        • Receiving Message
        • Historical Message
        • Forwarding Message
        • Modifying Message
        • Deleting Message
        • Clearing Messages
        • Recalling Message
        • Online Message
        • Read Receipt
        • Querying Message
        • Group @ Message
        • Targeted Group Message
        • Notification Muting
        • Message Extension
      • Conversation
        • Conversation Overview
        • Conversation List
        • Getting Conversation
        • Conversation Unread Count
        • Pinning Conversation to the Top
        • Deleting Conversation
        • Conversation Draft
        • Conversation Mark
        • Conversation Group
      • Group
        • Group Overview
        • Group Management
        • Group Profile
        • Group Member Management
        • Group Member Profile
        • Custom Group Attribute
        • Group Counter
      • User
        • User Profile
        • User Status
        • Friend Management
        • Friend List
        • Blocklist
  • Unreal Engine(Game Solution)
    • SDK
      • SDK Integration
  • Free Demos
  • Server APIs
    • Generating UserSig
    • RESTful APIs
      • RESTful API Overview
      • RESTful API List
      • Message Related
        • Send Message
          • Sending One-to-One Messages to One User
          • Sending One-to-One Messages to Multiple Users
          • Sending Ordinary Messages in a Group
          • Sending System Messages in a Group
          • Broadcast Message of Audio-Video Group
          • Importing One-to-One Messages
          • Importing Group Messages
        • Historical Message
          • Modifying Historical One-to-one Messages
          • Modifying Historical Group Messages
          • Pulling Historical One-to-one Messages
          • Pulling Historical Group Messages
        • Delete Message
          • Deleting Messages Sent by a Specified User
        • Withdraw Message
          • Recalling One-to-One Messages
          • Recalling Group Messages
        • Read Receipt
          • Marking One-to-One Messages as Read
          • Pulling Group Message Read Receipt Details
          • Pulling Read Receipts for Group Messages
        • Message Extension
          • Pulling the Message Extension of a One-to-One Message
          • Configuring Message Extension for a One-to-One Message
          • Pulling Message Extension of a Group Message
          • Configuring Message Extension for a Group Message
        • Pushing to All Users
          • API for Pushing to All Users
          • Pushing to All Users
          • Setting Application Attribute Names
          • Getting Application Attribute Names
          • Getting User Attributes
          • Setting User Attributes
          • Deleting User Attributes
          • Getting User Tags
          • Adding User Tags
          • Deleting User Tags
          • Deleting All Tags of a User
      • Session Related
        • Conversation List
          • Pulling a conversation list
        • Session Unread Count
          • Setting the Unread Message Count of a Member
          • Querying Unread One-to-One Message Count
        • Delete Session
          • Deleting a conversation
        • Session Grouping Tag
          • Creating Conversation Group Data
          • Updating Conversation Group Data
          • Deleting Conversation Group Data
          • Creating or Updating Conversation Mark Data
          • Searching for Conversation Group Marks
          • Pulling Conversation Group Mark Data
      • Group Related
        • Group Management
          • Getting All Groups in an App
          • Creating a Group
          • Disbanding a Group
          • Getting the Groups a User Has Joined
        • Group Information
          • Getting Group Profiles
          • Modifying the Profile of a Group
          • Importing a Group Profile
        • Group Member Management
          • Adding Group Members
          • Deleting Group Members
          • Banning Group Members
          • Unbanning Group Members
          • Bulk Muting and Unmuting
          • Getting the List of Muted Group Members
          • Changing Group Owner
          • Querying the Roles of Users in a Group
          • Importing Group Members
        • Group Member Information
          • Getting Group Member Profiles
          • Modifying the Profile of a Group Member
        • Group Custom Attributes
          • Getting Group Custom Attributes
          • Modifying Group Custom Attributes
          • Clearing Group Custom Attributes
          • Resetting Group Custom Attributes
          • Deleting Group Custom Attributes
        • Live Group Management
          • Getting the Number of Online Users in an Audio-Video Group
          • Getting the List of Online Members in Audio-Video Group
          • Setting Audio-Video Group Member Marks
          • Getting the List of Banned Group Members.
        • Community Management
          • Creating Topic
          • Deleting Topic
          • Getting Topic Profile
          • Modifying Topic Profile
          • Importing Topic Profiles
        • Group Counter
          • Getting Group Counters
          • Updating Group Counters
          • Deleting Group Counters
      • User Management
        • Account Management
          • Importing a Single Account
          • Importing Multiple Accounts
          • Deleting Accounts
          • Querying Accounts
        • User Information
          • Setting Profiles
          • Pulling Profiles
        • User Status
          • Invalidating Account Login States
          • Querying Account Online Status
        • Friend Management
          • Adding Friends
          • Importing Friends
          • Updating Friends
          • Deleting Friends
          • Deleting All Friends
          • Verifying Friends
          • Pulling Friends
          • Pulling Specified Friends
        • Friend Lists
          • Adding Lists
          • Deleting Lists
          • Pulling Lists
        • Blocklist
          • Blocklisting Users
          • Unblocklisting Users
          • Pulling a Blacklist
          • Verifying Users on a Blocklist
      • Global Mute Management
        • Setting Global Mute
        • Querying Global Mute
      • Operations Management
        • Pulling Operations Data
        • Downloading Recent Messages
        • Getting Server IP Addresses
      • Chatbots
        • Pulling Chatbot Accounts
        • Creating Chatbot Accounts
        • Deleting Chatbot Accounts
    • Webhooks
      • Webhook Overview
      • Webhook Command List
      • Operations Management Callbacks
        • API Overclocking Alarm Callbacks
      • Online Status Webhooks
        • Status Change Webhooks
      • Relationship Chain Webhooks
        • After a Profile Is Updated
        • Before a Friend Is Added
        • Before a Friend Request Is Responded
        • After a Friend Is Added
        • After a Friend Is Deleted
        • After a User Is Added to Blocklist
        • After a User Is Removed from Blocklist
      • One-to-One Message Webhooks
        • Before a One-to-One Message Is Sent
        • After a One-to-One Message Is Sent
        • After a One-to-One message Is Marked as Read
        • After A One-to-One Message Is Recalled
      • Group Webhooks
        • Before a Group Is Created
        • After a Group Is Created
        • Before Applying to Join a Group
        • Before Inviting a User to a Group
        • After a User Joins a Group
        • After a User Leaves a Group
        • Before Group Message Is Sent
        • After a Group Message Is Sent
        • After a Group Is Full
        • After a Group Is Disbanded
        • After Group Profile Is Modified
        • Callback After Recalling Group Messages
        • Webhook for Online and Offline Status of Audio-Video Group Members
        • Webhook for Exceptions When Group Messages Are Sent
        • Before a Topic Is Created
        • After a Topic Is Created
        • After a Topic Is Deleted
        • Topic Profile Change Webhook
        • Callback After Group Member Profile Changed
        • Callback After Group Attribute Changed
        • Callback After Read Receipt
        • Callback After the Group Owner Changed
      • Webhook Mutual Authentication Configuration Guide
        • Apache Mutual Authentication Configuration
        • Nginx Mutual Authentication Configuration
      • Chatbot webhooks
        • Chatbot Passthrough Message Callback
  • Console Guide
    • Creating and Upgrading an Application
    • Basic Configuration
    • Feature Configuration
    • Account Management
    • Group Management
    • Webhook Configuration
  • Product Introduction
    • Message Management
      • One-to-One Message
      • Message Storage
      • Offline Push
      • Group Message
      • Message Formats
    • Account System
      • Login Authentication
      • Online Status Management
    • Group Related
      • Group System
      • Group Management
    • User Profile and Relationship Chain
      • Profile Management
      • Relationship Chain Management
  • Purchase Guide
    • Billing Overview
    • Pricing
  • Error Codes
Chat

Signaling Management

Overview

Signaling APIs are a set of invitation process control APIs based on IM messages. They can be used to implement a variety of real-time features, including:
Audio-video chat rooms: mic on or mic off
Chatting: audio/video calls
Education: control of the process for teachers to invite students to "raise hands"

Features

Signaling APIs support the following features:

One-to-one chat invitation

You can use the invite signaling API to make an point-to-point call. When receiving the invitation notification onReceiveNewInvitation, the invitee can choose to accept the invitation, reject, or wait until the invitation times out.

Group chat invitation

Members of the group can initiate a group call invitation via inviteInGroup within the group. When receiving the invitation onReceiveNewInvitation, an invitee can choose to accept, reject, or wait until the invitation times out.

Canceling an invitation

Before an invitation times out and the invitee processes the invitation, the inviter can cancel the invitation via cancel. After the inviter cancels the invitation, an invitee will receive a cancellation notification onInvitationCancelled, and the invitation process ends.


Accepting an invitation

When receiving an invitation onReceiveNewInvitation, an invitee can accept the invitation via accept before the invitation times out and the inviter cancels the invitation. If the invitee accepts the invitation, the inviter will receive an invitation acceptance notification onInviteeAccepted. After the processing (including acceptance, rejection, and timeout) at the invitee side ends, the invitation process ends.


Rejecting an invitation

When receiving an invitation notification onReceiveNewInvitation, an invitee can reject the invitation via reject before the invitation times out and the inviter cancels the invitation. If the invitee rejects the invitation, the inviter will receive an invitation rejection notification onInviteeRejected. After the processing (including acceptance, rejection, and timeout) at the invitee side ends, the invitation process ends.

Invitation timeout

If the timeout duration of the invitation API is greater than 0 and an invitee does not respond within the timeout duration, the invitation times out, and the inviter and invitee will receive a timeout notification onInvitationTimeout. After the processing (including acceptance, rejection, and timeout) at the invitee side ends, the invitation process ends. If the timeout duration of the invitation API is 0, there will be no timeout notification.


Use Cases

Audio/Video call

In the open-source project TRTCFlutterScenesDemo, we developed an audio/video call solution suitable for one-to-one and multi-person chatting based on TRTC. You can directly modify the demo for adaptation. The following takes the one-to-one video call process as an example to introduce how signaling APIs work with the TRTC SDK.
One-to-one video call process:
1. The inviter enters the TRTC room based on the room ID generated at the service layer and calls the signaling invitation API invite to initiate an audio/video call request, including the room ID in the custom field of the invitation API.
2. The invitee receives the signaling invitation notification onReceiveNewInvitation and gets the room ID based on the custom data. The invitee's phone begins to ring.
3. The invitee processes the invitation notification:
Accepting the invitation: the invitee calls the accept signaling API and enters the TRTC room based on the room ID, and calls the openCamera() function to enable the local camera. The inviter and invitee receive the onRemoteUserEnterRoom callback from the TRTC SDK, and the systems of the two parties record the start time of the call.
Rejecting the invitation: the invitee calls the reject signaling API to end the call.
If the invitee is on the phone with someone else, the invitee calls the reject signaling API to reject the invitation and specify the rejection reason (busy local line) in the custom data.
4. After the invitee answers the call and the audio/video channel between the inviter and invitee is established, both the inviter and invitee will receive the onUserVideoAvailable event notification from the TRTC SDK, which indicates that they have received each other's video image. At this point, they can call the startRemoteView API of the TRTC SDK to display the remote video image, and the remote audio will be played back by default.
5. After the call ends (either the inviter or invitee hangs up), the party who hangs up exits the TRTC room. The other party receives the onRemoteUserLeaveRoom callback from the TRTC SDK, and its system calculates the total duration of the call and initiates an invitation again, including the call end event and call duration in the custom data to facilitate UI display.
Flowchart


Education: teacher inviting students to "raise hands"

In this scenario, the teacher asks students to "raise hands" and then chooses one of the students to speak. The process is as follows:
1. The teacher calls the inviteInGroup API to invite students to "raise hands", specifying the "hand raising" operation in the custom field data. The students receive the onReceiveNewInvitation callback.
2. Based on the inviteeList and data fields in onReceiveNewInvitation, a student determines that he/she is one of the invitees and the operation is hand raising. Then the student calls the accept API to raise her/his hand.
3. If a student raises her/his hand, others can receive the onInviteeAccepted callback. The system determines that the data field is hand raising and displays the list of students who raise hands.
4. The teacher calls the inviteInGroup API to invite one of the students who raise their hands to speak. At this time, the system specifies the "speaking" operation in the custom field data. The students receive the onReceiveNewInvitation callback.
5. Based on the inviteeList and data fields in the onReceiveNewInvitation callback, a student determines that he/she is one of the invitees and the operation is speaking. Then the student calls the accept API to speak.
6. If a student speaks, others can receive the onInviteeAccepted callback, and their systems determine that the data field is speaking and display the list of students who speak.