# Functions
GetTransferData unmarshals extension data.
ToExtensionData converts a message to a graphsync extension.
# Constants
ExtensionDataTransfer1_1 is the identifier for the v1.1 data transfer extension to graphsync.
ExtensionIncomingRequest1_1 is the identifier for data sent by the IncomingRequest hook.
ExtensionOutgoingBlock1_1 is the identifier for data sent by the OutgoingBlock hook.
# Variables
ProtocolMap maps graphsync extensions to their libp2p protocols.
# Interfaces
GsExtended is a small interface used by GetTransferData.