lotus/node/modules/libp2p/relay.go

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package libp2p
import (
"fmt"
"github.com/libp2p/go-libp2p"
circuit "github.com/libp2p/go-libp2p-circuit"
coredisc "github.com/libp2p/go-libp2p-core/discovery"
routing "github.com/libp2p/go-libp2p-core/routing"
discovery "github.com/libp2p/go-libp2p-discovery"
basichost "github.com/libp2p/go-libp2p/p2p/host/basic"
relay "github.com/libp2p/go-libp2p/p2p/host/relay"
"go.uber.org/fx"
"github.com/filecoin-project/go-lotus/node/modules/helpers"
)
func Relay(disable, enableHop bool) func() (opts Libp2pOpts, err error) {
return func() (opts Libp2pOpts, err error) {
if disable {
// Enabled by default.
opts.Opts = append(opts.Opts, libp2p.DisableRelay())
} else {
relayOpts := []circuit.RelayOpt{circuit.OptDiscovery}
if enableHop {
relayOpts = append(relayOpts, circuit.OptHop)
}
opts.Opts = append(opts.Opts, libp2p.EnableRelay(relayOpts...))
}
return
}
}
// TODO: should be use baseRouting or can we use higher level router here?
func Discovery(router BaseIpfsRouting) (coredisc.Discovery, error) {
crouter, ok := router.(routing.ContentRouting)
if !ok {
return nil, fmt.Errorf("no suitable routing for discovery")
}
return discovery.NewRoutingDiscovery(crouter), nil
}
// NOTE: only set when relayHop is set
func AdvertiseRelay(mctx helpers.MetricsCtx, d coredisc.Discovery) {
relay.Advertise(mctx, d)
}
// NOTE: only set when relayHop is not set
func AutoRelay(mctx helpers.MetricsCtx, lc fx.Lifecycle, router BaseIpfsRouting, h RawHost, d coredisc.Discovery) error {
ctx := helpers.LifecycleCtx(mctx, lc)
// TODO: review: LibP2P doesn't set this as host in config.go, why?
_ = relay.NewAutoRelay(ctx, h.(*basichost.BasicHost), d, router)
return nil
}