neoneo-go/pkg/network/peer.go
2022-10-12 10:16:07 +03:00

90 lines
3.5 KiB
Go

package network
import (
"context"
"net"
"github.com/nspcc-dev/neo-go/pkg/network/payload"
)
// Peer represents a network node neo-go is connected to.
type Peer interface {
// RemoteAddr returns the remote address that we're connected to now.
RemoteAddr() net.Addr
// PeerAddr returns the remote address that should be used to establish
// a new connection to the node. It can differ from the RemoteAddr
// address in case the remote node is a client and its current
// connection port is different from the one the other node should use
// to connect to it. It's only valid after the handshake is completed.
// Before that, it returns the same address as RemoteAddr.
PeerAddr() net.Addr
Disconnect(error)
// EnqueueMessage is a blocking packet enqueuer similar to EnqueueP2PMessage,
// but using the lowest priority queue.
EnqueueMessage(*Message) error
// BroadcastPacket is a context-bound packet enqueuer, it either puts the
// given packet into the queue or exits with errors if the context expires
// or peer disconnects. It accepts a slice of bytes that
// can be shared with other queues (so that message marshalling can be
// done once for all peers). It returns an error if the peer has not yet
// completed handshaking.
BroadcastPacket(context.Context, []byte) error
// BroadcastHPPacket is the same as BroadcastPacket, but uses a high-priority
// queue.
BroadcastHPPacket(context.Context, []byte) error
// EnqueueP2PMessage is a temporary wrapper that sends a message via
// EnqueueP2PPacket if there is no error in serializing it.
EnqueueP2PMessage(*Message) error
// EnqueueP2PPacket is a blocking packet enqueuer, it doesn't return until
// it puts the given packet into the queue. It accepts a slice of bytes that
// can be shared with other queues (so that message marshalling can be
// done once for all peers). It returns an error if the peer has not yet
// completed handshaking. This queue is intended to be used for unicast
// peer to peer communication that is more important than broadcasts
// (handled by BroadcastPacket) but less important than high-priority
// messages (handled by EnqueueHPPacket and BroadcastHPPacket).
EnqueueP2PPacket([]byte) error
// EnqueueHPPacket is a blocking high priority packet enqueuer, it
// doesn't return until it puts the given packet into the high-priority
// queue.
EnqueueHPPacket([]byte) error
Version() *payload.Version
LastBlockIndex() uint32
Handshaked() bool
IsFullNode() bool
// SendPing enqueues a ping message to be sent to the peer and does
// appropriate protocol handling like timeouts and outstanding pings
// management.
SendPing(*Message) error
// SendVersion checks handshake status and sends a version message to
// the peer.
SendVersion() error
SendVersionAck(*Message) error
// StartProtocol is a goroutine to be run after the handshake. It
// implements basic peer-related protocol handling.
StartProtocol()
HandleVersion(*payload.Version) error
HandleVersionAck() error
// HandlePing checks ping contents against Peer's state and updates it.
HandlePing(ping *payload.Ping) error
// HandlePong checks pong contents against Peer's state and updates it.
HandlePong(pong *payload.Ping) error
// AddGetAddrSent is to inform local peer context that a getaddr command
// is sent. The decision to send getaddr is server-wide, but it needs to be
// accounted for in peer's context, thus this method.
AddGetAddrSent()
// CanProcessAddr checks whether an addr command is expected to come from
// this peer and can be processed.
CanProcessAddr() bool
}