acceptFile (13)

The acceptFile message is sent by the file recipient back to the sender in response to a fileHeader. It signals that the user has agreed to download the file and that the sender can begin transmitting file data when requested.

Core Data Types

• string: A standard UTF-8 encoded string.

Payload Structure

The payload contains the unique ID of the file transfer being accepted.

Field	Data Type	Min	Max	Description
uid	string	*	*	The unique identifier of the file transfer session, matching the uid from the corresponding fileHeader.

Behavioral Notes

• Trigger: This message is sent only after the recipient user manually accepts an incoming file transfer prompt that was initiated by a fileHeader.
• Sender Action: Upon receiving acceptFile, the original sender's client marks the transfer as accepted. It does not proactively send file data; instead, it waits for the recipient to request specific chunks using requestFileData messages. This allows the receiver to control the flow of data.