msgReaction (34)

The msgReaction message is used to apply a reaction (typically an emoji) to a previously sent message. It allows for richer, non-verbal communication within a chat conversation.

Core Data Types

• IxiBytes: See IxiBytes Encoding.
• string: A standard UTF-8 encoded string, prefixed with its length.

Payload Structure

The payload is a composite object containing the ID of the message to react to and the reaction content itself.

Field	Data Type	Min	Max	Description
targetMessageId	IxiBytes	16	64	The unique ID of the message to which the reaction is being applied.
reaction	string	1	*	The reaction content, typically a single UTF-8 emoji character. An empty string can signify removing a reaction.

Behavioral Notes

• Associativity: The sender of the reaction is identified by the sender address of the StreamMessage envelope. The recipient client uses this address to associate the reaction with the correct user.
• UI Update: When a client receives this message, it should update the chat interface to display the reaction on the message identified by targetMessageId.
• Removing Reactions: Sending a msgReaction with the same targetMessageId and an empty reaction string can be used as a signal to remove a previously added reaction.