peer

type Client interface {
	// RequestAny synchronously sends request to the first connected peer that matches the specified minVersion in
	// random order.
	// A peer is considered a match if its version is greater than or equal to the specified minVersion
	// Returns errNoPeersMatchingVersion if no peer could be found matching specified version
	// and errRequestFailed if the request should be retried.
	RequestAny(minVersion version.Application, request []byte) ([]byte, error)

	// Request synchronously sends request to the selected nodeID
	// Returns response bytes
	// Returns errRequestFailed if request should be retried
	Request(nodeID ids.NodeID, request []byte) ([]byte, error)

	// Gossip sends given gossip message to peers
	Gossip(gossip []byte) error
}

type Network interface {
	validators.Connector
	common.AppHandler

	// RequestAny synchronously sends request to the first connected peer that matches the specified minVersion in
	// random order.
	// A peer is considered a match if its version is greater than or equal to the specified minVersion
	// Returns an error if the request could not be sent to a peer with the desired [minVersion].
	RequestAny(minVersion version.Application, message []byte, handler message.ResponseHandler) error

	// Request sends message to given nodeID, notifying handler when there's a response or timeout
	Request(nodeID ids.NodeID, message []byte, handler message.ResponseHandler) error

	// Gossip sends given gossip message to peers
	Gossip(gossip []byte) error

	// Shutdown stops all peer channel listeners and marks the node to have stopped
	// n.Start() can be called again but the peers will have to be reconnected
	// by calling OnPeerConnected for each peer
	Shutdown()

	// SetGossipHandler sets the provided gossip handler as the gossip handler
	SetGossipHandler(handler message.GossipHandler)

	// SetRequestHandler sets the provided request handler as the request handler
	SetRequestHandler(handler message.RequestHandler)

	// Size returns the size of the network in number of connected peers
	Size() uint32
}