getAppProtocols (43)

The getAppProtocols message is sent to a contact to query which custom, named application protocols they support. This is used for service discovery before attempting to send protocol-specific data.

Core Data Types

This message has no payload.

Payload Structure

The getAppProtocols message is defined by its type code and carries no data in its payload.

Field	Data Type	Min	Max	Description
N/A	N/A	0	0	The payload is always empty.

Behavioral Notes

• Discovery: A client sends this message to a contact to discover what application protocols it can interact with.
• Response: A node that receives this message SHOULD respond with an appProtocols message, listing the protocol IDs it supports.