autorelay

Documentation

Index

• func Filter(addrs []ma.Multiaddr) []ma.Multiaddr
• type AutoRelay
  • func NewAutoRelay(bhost *basic.BasicHost, opts ...Option) (*AutoRelay, error)
  • func (r *AutoRelay) Close() error
  • func (r *AutoRelay) Start()
• type AutoRelayHost
  • func NewAutoRelayHost(h host.Host, ar *AutoRelay) *AutoRelayHost
  • func (h *AutoRelayHost) Close() error
  • func (h *AutoRelayHost) Start()
• type Option
  • func WithBackoff(d time.Duration) Option
  • func WithBootDelay(d time.Duration) Option
  • func WithClock(cl clock.Clock) Option
  • func WithMaxCandidateAge(d time.Duration) Option
  • func WithMaxCandidates(n int) Option
  • func WithMinCandidates(n int) Option
  • func WithMinInterval(interval time.Duration) Option
  • func WithNumRelays(n int) Option
  • func WithPeerSource(f PeerSource) Option
  • func WithStaticRelays(static []peer.AddrInfo) Option
• type PeerSource

Functions

func Filter

func Filter(addrs []ma.Multiaddr) []ma.Multiaddr

Filter filters out all relay addresses.

Types

type AutoRelay

type AutoRelay struct {
	// contains filtered or unexported fields
}

func NewAutoRelay

func NewAutoRelay(bhost *basic.BasicHost, opts ...Option) (*AutoRelay, error)

func (*AutoRelay) Close

func (r *AutoRelay) Close() error

func (*AutoRelay) Start

func (r *AutoRelay) Start()

type AutoRelayHost

type AutoRelayHost struct {
	host.Host
	// contains filtered or unexported fields
}

func NewAutoRelayHost

func NewAutoRelayHost(h host.Host, ar *AutoRelay) *AutoRelayHost

func (*AutoRelayHost) Close

func (h *AutoRelayHost) Close() error

func (*AutoRelayHost) Start

func (h *AutoRelayHost) Start()

type Option

type Option func(*config) error

func WithBackoff

func WithBackoff(d time.Duration) Option

WithBackoff sets the time we wait after failing to obtain a reservation with a candidate.

func WithBootDelay

func WithBootDelay(d time.Duration) Option

WithBootDelay set the boot delay for finding relays. We won't attempt any reservation if we've have less than a minimum number of candidates. This prevents us to connect to the "first best" relay, and allows us to carefully select the relay. However, in case we haven't found enough relays after the boot delay, we use what we have.

func WithClock

func WithClock(cl clock.Clock) Option

func WithMaxCandidateAge

func WithMaxCandidateAge(d time.Duration) Option

WithMaxCandidateAge sets the maximum age of a candidate. When we are connected to the desired number of relays, we don't ask the peer source for new candidates. This can lead to AutoRelay's candidate list becoming outdated, and means we won't be able to quickly establish a new relay connection if our existing connection breaks, if all the candidates have become stale.

func WithMaxCandidates

func WithMaxCandidates(n int) Option

WithMaxCandidates sets the number of relay candidates that we buffer.

func WithMinCandidates

func WithMinCandidates(n int) Option

WithMinCandidates sets the minimum number of relay candidates we collect before to get a reservation with any of them (unless we've been running for longer than the boot delay). This is to make sure that we don't just randomly connect to the first candidate that we discover.

func WithMinInterval

func WithMinInterval(interval time.Duration) Option

WithMinInterval sets the minimum interval after which peerSource callback will be called for more candidates even if AutoRelay needs new candidates.

func WithNumRelays

func WithNumRelays(n int) Option

WithNumRelays sets the number of relays we strive to obtain reservations with.

func WithPeerSource

func WithPeerSource(f PeerSource) Option

WithPeerSource defines a callback for AutoRelay to query for more relay candidates.

func WithStaticRelays

func WithStaticRelays(static []peer.AddrInfo) Option

type PeerSource

type PeerSource func(ctx context.Context, num int) <-chan peer.AddrInfo

AutoRelay will call this function when it needs new candidates because it is not connected to the desired number of relays or we get disconnected from one of the relays. Implementations must send *at most* numPeers, and close the channel when they don't intend to provide any more peers. AutoRelay will not call the callback again until the channel is closed. Implementations should send new peers, but may send peers they sent before. AutoRelay implements a per-peer backoff (see WithBackoff). See WithMinInterval for setting the minimum interval between calls to the callback. The context.Context passed may be canceled when AutoRelay feels satisfied, it will be canceled when the node is shutting down. If the context is canceled you MUST close the output channel at some point.