upstream

type Upstream interface {
	ActiveInThePast(time.Duration) bool
	CachedRemoteDigestOfLocalHeight() blockdigest.Digest
	CachedRemoteHeight() uint64
	Connect(*util.Connection, []byte) error
	ConnectedTo() *zmqutil.Connected
	Destroy()
	GetBlockData(uint64) ([]byte, error)
	IsConnectedTo([]byte) bool
	IsConnected() bool
	LocalHeight() uint64
	Name() string
	RemoteAddr() (string, error)
	RemoteDigestOfHeight(uint64) (blockdigest.Digest, error)
	RemoteHeight() (uint64, error)
	ResetServer()
	ServerPublicKey() []byte
}