Merge pull request #4849 from filecoin-project/feat/conngater

Connection Gater support

node/modules/lp2p/conngater.go

@@ -0,0 +1,17 @@
+package lp2p
+
+import (
+	"github.com/libp2p/go-libp2p"
+	"github.com/libp2p/go-libp2p/p2p/net/conngater"
+
+	"github.com/filecoin-project/lotus/node/modules/dtypes"
+)
+
+func ConnGater(ds dtypes.MetadataDS) (*conngater.BasicConnectionGater, error) {
+	return conngater.NewBasicConnectionGater(ds)
+}
+
+func ConnGaterOption(cg *conngater.BasicConnectionGater) (opts Libp2pOpts, err error) {
+	opts.Opts = append(opts.Opts, libp2p.ConnectionGater(cg))
+	return
+}