Module sc_network::request_responses

Collection of request-response protocols.

The RequestResponsesBehaviour struct defined in this module provides support for zero or more so-called “request-response” protocols.

A request-response protocol works in the following way:

• For every emitted request, a new substream is open and the protocol is negotiated. If the remote supports the protocol, the size of the request is sent as a LEB128 number, followed with the request itself. The remote then sends the size of the response as a LEB128 number, followed with the response.

• Requests have a certain time limit before they time out. This time includes the time it takes to send/receive the request and response.

• If provided, a “requests processing” channel is used to handle incoming requests.

Structs

• Config
  The configuration for a Behaviour protocol.
• IncomingRequest
  A single request received by a peer on a request-response protocol.
• OutgoingResponse
  Response for an incoming request to be send by a request protocol handler.
• ProtocolConfig
  Configuration for a single request-response protocol.
• RequestId
  The ID of an inbound or outbound request.
• RequestResponsesBehaviour
  Implementation of NetworkBehaviour that provides support for request-response protocols.

Enums

• Event
  Event generated by the RequestResponsesBehaviour.
• IfDisconnected
  When sending a request, what to do on a disconnected recipient.
• InboundFailure
  Possible failures occurring in the context of receiving an inbound request and sending a response.
• OutboundFailure
  Possible failures occurring in the context of sending an outbound request and receiving the response.
• RegisterError
  Error when registering a protocol.
• RequestFailure
  Error in a request.
• ResponseFailure
  Error when processing a request sent by a remote.