Repository: libp2p/go-libp2p
Pull request #1178 (2021-09-08 17:18:16)

hole punching signaling
Now as a PR to master. Giving up on the plan to develop this in a feature branch.


Patch:
diff --git a/config/config.go b/config/config.go
index bce0f300..48df4d20 100644
--- a/config/config.go
+++ b/config/config.go
@@ -21,6 +21,7 @@ import (
 	bhost "github.com/libp2p/go-libp2p/p2p/host/basic"
 	"github.com/libp2p/go-libp2p/p2p/host/relay"
 	routed "github.com/libp2p/go-libp2p/p2p/host/routed"
+	holepunch "github.com/libp2p/go-libp2p/p2p/protocol/holepunch"
 
 	autonat "github.com/libp2p/go-libp2p-autonat"
 	blankhost "github.com/libp2p/go-libp2p-blankhost"
@@ -95,6 +96,9 @@ type Config struct {
 	EnableAutoRelay bool
 	AutoNATConfig
 	StaticRelays []peer.AddrInfo
+
+	EnableHolePunching  bool
+	HolePunchingOptions []holepunch.Option
 }
 
 func (cfg *Config) makeSwarm(ctx context.Context) (*swarm.Swarm, error) {
@@ -189,12 +193,14 @@ func (cfg *Config) NewNode(ctx context.Context) (host.Host, error) {
 	}
 
 	h, err := bhost.NewHost(ctx, swrm, &bhost.HostOpts{
-		ConnManager:       cfg.ConnManager,
-		AddrsFactory:      cfg.AddrsFactory,
-		NATManager:        cfg.NATManager,
-		EnablePing:        !cfg.DisablePing,
-		UserAgent:         cfg.UserAgent,
-		MultiaddrResolver: cfg.MultiaddrResolver,
+		ConnManager:         cfg.ConnManager,
+		AddrsFactory:        cfg.AddrsFactory,
+		NATManager:          cfg.NATManager,
+		EnablePing:          !cfg.DisablePing,
+		UserAgent:           cfg.UserAgent,
+		MultiaddrResolver:   cfg.MultiaddrResolver,
+		EnableHolePunching:  cfg.EnableHolePunching,
+		HolePunchingOptions: cfg.HolePunchingOptions,
 	})
 
 	if err != nil {
@@ -339,7 +345,7 @@ func (cfg *Config) NewNode(ctx context.Context) (host.Host, error) {
 		autonatOpts = append(autonatOpts, autonat.WithReachability(*cfg.AutoNATConfig.ForceReachability))
 	}
 
-	autonat, err := autonat.New(ctx, h, autonatOpts...)
+	autonat, err := autonat.New(h, autonatOpts...)
 	if err != nil {
 		h.Close()
 		return nil, fmt.Errorf("cannot enable autorelay; autonat failed to start: %v", err)
diff --git a/defaults.go b/defaults.go
index a60db9fe..e15a8e5c 100644
--- a/defaults.go
+++ b/defaults.go
@@ -5,16 +5,15 @@ package libp2p
 import (
 	"crypto/rand"
 
-	"github.com/libp2p/go-libp2p-core/crypto"
+	crypto "github.com/libp2p/go-libp2p-core/crypto"
 	mplex "github.com/libp2p/go-libp2p-mplex"
 	noise "github.com/libp2p/go-libp2p-noise"
-	"github.com/libp2p/go-libp2p-peerstore/pstoremem"
-	quic "github.com/libp2p/go-libp2p-quic-transport"
+	pstoremem "github.com/libp2p/go-libp2p-peerstore/pstoremem"
 	tls "github.com/libp2p/go-libp2p-tls"
 	yamux "github.com/libp2p/go-libp2p-yamux"
-	"github.com/libp2p/go-tcp-transport"
+	tcp "github.com/libp2p/go-tcp-transport"
 	ws "github.com/libp2p/go-ws-transport"
-	"github.com/multiformats/go-multiaddr"
+	multiaddr "github.com/multiformats/go-multiaddr"
 )
 
 // DefaultSecurity is the default security option.
@@ -41,7 +40,6 @@ var DefaultMuxers = ChainOptions(
 // libp2p instead of replacing them.
 var DefaultTransports = ChainOptions(
 	Transport(tcp.NewTCPTransport),
-	Transport(quic.NewTransport),
 	Transport(ws.New),
 )
 
diff --git a/examples/go.mod b/examples/go.mod
index 5133acee..60a95717 100644
--- a/examples/go.mod
+++ b/examples/go.mod
@@ -14,6 +14,7 @@ require (
 	github.com/libp2p/go-libp2p-discovery v0.5.1
 	github.com/libp2p/go-libp2p-kad-dht v0.13.0
 	github.com/libp2p/go-libp2p-noise v0.2.2
+	github.com/libp2p/go-libp2p-quic-transport v0.11.2
 	github.com/libp2p/go-libp2p-swarm v0.5.3
 	github.com/libp2p/go-libp2p-tls v0.2.0
 	github.com/multiformats/go-multiaddr v0.4.0
diff --git a/examples/go.sum b/examples/go.sum
index 52367b4b..2e8ce11b 100644
--- a/examples/go.sum
+++ b/examples/go.sum
@@ -429,11 +429,10 @@ github.com/libp2p/go-flow-metrics v0.0.1/go.mod h1:Iv1GH0sG8DtYN3SVJ2eG221wMiNpZ
 github.com/libp2p/go-flow-metrics v0.0.2/go.mod h1:HeoSNUrOJVK1jEpDqVEiUOIXqhbnS27omG0uWU5slZs=
 github.com/libp2p/go-flow-metrics v0.0.3 h1:8tAs/hSdNvUiLgtlSy3mxwxWP4I9y/jlkPFT7epKdeM=
 github.com/libp2p/go-flow-metrics v0.0.3/go.mod h1:HeoSNUrOJVK1jEpDqVEiUOIXqhbnS27omG0uWU5slZs=
+github.com/libp2p/go-libp2p-asn-util v0.0.0-20200825225859-85005c6cf052 h1:BM7aaOF7RpmNn9+9g6uTjGJ0cTzWr5j9i9IKeun2M8U=
 github.com/libp2p/go-libp2p-asn-util v0.0.0-20200825225859-85005c6cf052/go.mod h1:nRMRTab+kZuk0LnKZpxhOVH/ndsdr2Nr//Zltc/vwgo=
-github.com/libp2p/go-libp2p-asn-util v0.0.0-20210818120414-1f382a4aa43a h1:6yEuCOY31elgeJ2KA2JiREZjIznvH6lOWCdHRuhgEgc=
-github.com/libp2p/go-libp2p-asn-util v0.0.0-20210818120414-1f382a4aa43a/go.mod h1:wu+AnM9Ii2KgO5jMmS1rz9dvzTdj8BXqsPR9HR0XB7I=
-github.com/libp2p/go-libp2p-autonat v0.4.2 h1:YMp7StMi2dof+baaxkbxaizXjY1RPvU71CXfxExzcUU=
-github.com/libp2p/go-libp2p-autonat v0.4.2/go.mod h1:YxaJlpr81FhdOv3W3BTconZPfhaYivRdf53g+S2wobk=
+github.com/libp2p/go-libp2p-autonat v0.5.0 h1:/+3+4NcQV47DQ/duvRyFDP8oxv6CQTvSKYD5iWoPcYs=
+github.com/libp2p/go-libp2p-autonat v0.5.0/go.mod h1:085tmmuXn0nXgFwuF7a2tt4UxgTjuapbuml27v4htKY=
 github.com/libp2p/go-libp2p-blankhost v0.2.0 h1:3EsGAi0CBGcZ33GwRuXEYJLLPoVWyXJ1bcJzAJjINkk=
 github.com/libp2p/go-libp2p-blankhost v0.2.0/go.mod h1:eduNKXGTioTuQAUcZ5epXi9vMl+t4d8ugUBRQ4SqaNQ=
 github.com/libp2p/go-libp2p-circuit v0.4.0 h1:eqQ3sEYkGTtybWgr6JLqJY6QLtPWRErvFjFDfAOO1wc=
@@ -459,7 +458,6 @@ github.com/libp2p/go-libp2p-core v0.7.0/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJB
 github.com/libp2p/go-libp2p-core v0.8.0/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.1/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.2/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
-github.com/libp2p/go-libp2p-core v0.8.5/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.6/go.mod h1:dgHr0l0hIKfWpGpqAMbpo19pen9wJfdCGv51mTmdpmM=
 github.com/libp2p/go-libp2p-core v0.9.0 h1:t97Mv0LIBZlP2FXVRNKKVzHJCIjbIWGxYptGId4+htU=
 github.com/libp2p/go-libp2p-core v0.9.0/go.mod h1:ESsbz31oC3C1AvMJoGx26RTuCkNhmkSRCqZ0kQtJ2/8=
@@ -487,9 +485,8 @@ github.com/libp2p/go-libp2p-peerstore v0.2.8 h1:nJghUlUkFVvyk7ccsM67oFA6kqUkwyCM
 github.com/libp2p/go-libp2p-peerstore v0.2.8/go.mod h1:gGiPlXdz7mIHd2vfAsHzBNAMqSDkt2UBFwgcITgw1lA=
 github.com/libp2p/go-libp2p-pnet v0.2.0 h1:J6htxttBipJujEjz1y0a5+eYoiPcFHhSYHH6na5f0/k=
 github.com/libp2p/go-libp2p-pnet v0.2.0/go.mod h1:Qqvq6JH/oMZGwqs3N1Fqhv8NVhrdYcO0BW4wssv21LA=
+github.com/libp2p/go-libp2p-quic-transport v0.11.2 h1:p1YQDZRHH4Cv2LPtHubqlQ9ggz4CKng/REZuXZbZMhM=
 github.com/libp2p/go-libp2p-quic-transport v0.11.2/go.mod h1:wlanzKtIh6pHrq+0U3p3DY9PJfGqxMgPaGKaK5LifwQ=
-github.com/libp2p/go-libp2p-quic-transport v0.12.0 h1:7IjDH4XNkmJbOMD+mxRloTe4LzMTq+vqvm2nYNL1N7M=
-github.com/libp2p/go-libp2p-quic-transport v0.12.0/go.mod h1:EKHqxZbWE/FhDJZ6ebyZ/4v3X9zyuuuKIN0XR9vANT0=
 github.com/libp2p/go-libp2p-record v0.1.2/go.mod h1:pal0eNcT5nqZaTV7UGhqeGqxFgGdsU/9W//C8dqjQDk=
 github.com/libp2p/go-libp2p-record v0.1.3 h1:R27hoScIhQf/A8XJZ8lYpnqh9LatJ5YbHs28kCIfql0=
 github.com/libp2p/go-libp2p-record v0.1.3/go.mod h1:yNUff/adKIfPnYQXgp6FQmNu3gLJ6EMg7+/vv2+9pY4=
@@ -568,9 +565,8 @@ github.com/libp2p/zeroconf/v2 v2.0.0 h1:qYAHAqUVh4hMSfu+iDTZNqH07wLGAvb1+DW4Tx/q
 github.com/libp2p/zeroconf/v2 v2.0.0/go.mod h1:J85R/d9joD8u8F9aHM8pBXygtG9W02enEwS+wWeL6yo=
 github.com/lightstep/lightstep-tracer-common/golang/gogo v0.0.0-20190605223551-bc2310a04743/go.mod h1:qklhhLq1aX+mtWk9cPHPzaBjWImj5ULL6C7HFJtXQMM=
 github.com/lightstep/lightstep-tracer-go v0.18.1/go.mod h1:jlF1pusYV4pidLvZ+XD0UBX0ZE6WURAspgAczcDHrL4=
+github.com/lucas-clemente/quic-go v0.21.2 h1:8LqqL7nBQFDUINadW0fHV/xSaCQJgmJC0Gv+qUnjd78=
 github.com/lucas-clemente/quic-go v0.21.2/go.mod h1:vF5M1XqhBAHgbjKcJOXY3JZz3GP0T3FQhz/uyOUS38Q=
-github.com/lucas-clemente/quic-go v0.23.0 h1:5vFnKtZ6nHDFsc/F3uuiF4T3y/AXaQdxjUqiVw26GZE=
-github.com/lucas-clemente/quic-go v0.23.0/go.mod h1:paZuzjXCE5mj6sikVLMvqXk8lJV2AsqtJ6bDhjEfxx0=
 github.com/lunixbochs/vtclean v1.0.0/go.mod h1:pHhQNgMf3btfWnGBVipUOjRYhoOsdGqdm/+2c2E2WMI=
 github.com/lyft/protoc-gen-validate v0.0.13/go.mod h1:XbGvPuh87YZc5TdIa2/I4pLk0QoUACkjt2znoq26NVQ=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
@@ -578,12 +574,12 @@ github.com/mailru/easyjson v0.0.0-20180823135443-60711f1a8329/go.mod h1:C1wdFJiN
 github.com/mailru/easyjson v0.0.0-20190312143242-1de009706dbe/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
 github.com/marten-seemann/qpack v0.2.1/go.mod h1:F7Gl5L1jIgN1D11ucXefiuJS9UMVP2opoCp2jDKb7wc=
 github.com/marten-seemann/qtls-go1-15 v0.1.4/go.mod h1:GyFwywLKkRt+6mfU99csTEY1joMZz5vmB1WNZH3P81I=
+github.com/marten-seemann/qtls-go1-15 v0.1.5 h1:Ci4EIUN6Rlb+D6GmLdej/bCQ4nPYNtVXQB+xjiXE1nk=
 github.com/marten-seemann/qtls-go1-15 v0.1.5/go.mod h1:GyFwywLKkRt+6mfU99csTEY1joMZz5vmB1WNZH3P81I=
 github.com/marten-seemann/qtls-go1-16 v0.1.4 h1:xbHbOGGhrenVtII6Co8akhLEdrawwB2iHl5yhJRpnco=
 github.com/marten-seemann/qtls-go1-16 v0.1.4/go.mod h1:gNpI2Ol+lRS3WwSOtIUUtRwZEQMXjYK+dQSBFbethAk=
+github.com/marten-seemann/qtls-go1-17 v0.1.0-rc.1 h1:/rpmWuGvceLwwWuaKPdjpR4JJEUH0tq64/I3hvzaNLM=
 github.com/marten-seemann/qtls-go1-17 v0.1.0-rc.1/go.mod h1:fz4HIxByo+LlWcreM4CZOYNuz3taBQ8rN2X6FqvaWo8=
-github.com/marten-seemann/qtls-go1-17 v0.1.0 h1:P9ggrs5xtwiqXv/FHNwntmuLMNq3KaSIG93AtAZ48xk=
-github.com/marten-seemann/qtls-go1-17 v0.1.0/go.mod h1:fz4HIxByo+LlWcreM4CZOYNuz3taBQ8rN2X6FqvaWo8=
 github.com/marten-seemann/tcp v0.0.0-20210406111302-dfbc87cc63fd h1:br0buuQ854V8u83wA0rVZ8ttrq5CpaPZdvrK0LP2lOk=
 github.com/marten-seemann/tcp v0.0.0-20210406111302-dfbc87cc63fd/go.mod h1:QuCEs1Nt24+FYQEqAAncTDPJIuGs+LxK1MCiFL25pMU=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
@@ -979,7 +975,6 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180719180050-a680a1efc54d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
diff --git a/examples/ipfs-camp-2019/go.sum b/examples/ipfs-camp-2019/go.sum
index 793c6bca..834fcc55 100644
--- a/examples/ipfs-camp-2019/go.sum
+++ b/examples/ipfs-camp-2019/go.sum
@@ -206,7 +206,6 @@ github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt
 github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
-github.com/golang/mock v1.6.0 h1:ErTB+efbowRARo13NNdxyJji2egdxLGQhRaY+DUumQc=
 github.com/golang/mock v1.6.0/go.mod h1:p6yTPP+5HYm5mzsMV8JkE6ZKdX+/wYM6Hr+LicevLPs=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -430,11 +429,10 @@ github.com/libp2p/go-flow-metrics v0.0.1/go.mod h1:Iv1GH0sG8DtYN3SVJ2eG221wMiNpZ
 github.com/libp2p/go-flow-metrics v0.0.2/go.mod h1:HeoSNUrOJVK1jEpDqVEiUOIXqhbnS27omG0uWU5slZs=
 github.com/libp2p/go-flow-metrics v0.0.3 h1:8tAs/hSdNvUiLgtlSy3mxwxWP4I9y/jlkPFT7epKdeM=
 github.com/libp2p/go-flow-metrics v0.0.3/go.mod h1:HeoSNUrOJVK1jEpDqVEiUOIXqhbnS27omG0uWU5slZs=
+github.com/libp2p/go-libp2p-asn-util v0.0.0-20200825225859-85005c6cf052 h1:BM7aaOF7RpmNn9+9g6uTjGJ0cTzWr5j9i9IKeun2M8U=
 github.com/libp2p/go-libp2p-asn-util v0.0.0-20200825225859-85005c6cf052/go.mod h1:nRMRTab+kZuk0LnKZpxhOVH/ndsdr2Nr//Zltc/vwgo=
-github.com/libp2p/go-libp2p-asn-util v0.0.0-20210818120414-1f382a4aa43a h1:6yEuCOY31elgeJ2KA2JiREZjIznvH6lOWCdHRuhgEgc=
-github.com/libp2p/go-libp2p-asn-util v0.0.0-20210818120414-1f382a4aa43a/go.mod h1:wu+AnM9Ii2KgO5jMmS1rz9dvzTdj8BXqsPR9HR0XB7I=
-github.com/libp2p/go-libp2p-autonat v0.4.2 h1:YMp7StMi2dof+baaxkbxaizXjY1RPvU71CXfxExzcUU=
-github.com/libp2p/go-libp2p-autonat v0.4.2/go.mod h1:YxaJlpr81FhdOv3W3BTconZPfhaYivRdf53g+S2wobk=
+github.com/libp2p/go-libp2p-autonat v0.5.0 h1:/+3+4NcQV47DQ/duvRyFDP8oxv6CQTvSKYD5iWoPcYs=
+github.com/libp2p/go-libp2p-autonat v0.5.0/go.mod h1:085tmmuXn0nXgFwuF7a2tt4UxgTjuapbuml27v4htKY=
 github.com/libp2p/go-libp2p-blankhost v0.2.0 h1:3EsGAi0CBGcZ33GwRuXEYJLLPoVWyXJ1bcJzAJjINkk=
 github.com/libp2p/go-libp2p-blankhost v0.2.0/go.mod h1:eduNKXGTioTuQAUcZ5epXi9vMl+t4d8ugUBRQ4SqaNQ=
 github.com/libp2p/go-libp2p-circuit v0.4.0 h1:eqQ3sEYkGTtybWgr6JLqJY6QLtPWRErvFjFDfAOO1wc=
@@ -460,7 +458,6 @@ github.com/libp2p/go-libp2p-core v0.7.0/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJB
 github.com/libp2p/go-libp2p-core v0.8.0/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.1/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.2/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
-github.com/libp2p/go-libp2p-core v0.8.5/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.6/go.mod h1:dgHr0l0hIKfWpGpqAMbpo19pen9wJfdCGv51mTmdpmM=
 github.com/libp2p/go-libp2p-core v0.9.0 h1:t97Mv0LIBZlP2FXVRNKKVzHJCIjbIWGxYptGId4+htU=
 github.com/libp2p/go-libp2p-core v0.9.0/go.mod h1:ESsbz31oC3C1AvMJoGx26RTuCkNhmkSRCqZ0kQtJ2/8=
@@ -490,9 +487,8 @@ github.com/libp2p/go-libp2p-pnet v0.2.0 h1:J6htxttBipJujEjz1y0a5+eYoiPcFHhSYHH6n
 github.com/libp2p/go-libp2p-pnet v0.2.0/go.mod h1:Qqvq6JH/oMZGwqs3N1Fqhv8NVhrdYcO0BW4wssv21LA=
 github.com/libp2p/go-libp2p-pubsub v0.5.3 h1:XCn5xvgA/AKpbbaeqbomfKtQCbT9QsU39tYsVj0IndQ=
 github.com/libp2p/go-libp2p-pubsub v0.5.3/go.mod h1:gVOzwebXVdSMDQBTfH8ACO5EJ4SQrvsHqCmYsCZpD0E=
+github.com/libp2p/go-libp2p-quic-transport v0.11.2 h1:p1YQDZRHH4Cv2LPtHubqlQ9ggz4CKng/REZuXZbZMhM=
 github.com/libp2p/go-libp2p-quic-transport v0.11.2/go.mod h1:wlanzKtIh6pHrq+0U3p3DY9PJfGqxMgPaGKaK5LifwQ=
-github.com/libp2p/go-libp2p-quic-transport v0.12.0 h1:7IjDH4XNkmJbOMD+mxRloTe4LzMTq+vqvm2nYNL1N7M=
-github.com/libp2p/go-libp2p-quic-transport v0.12.0/go.mod h1:EKHqxZbWE/FhDJZ6ebyZ/4v3X9zyuuuKIN0XR9vANT0=
 github.com/libp2p/go-libp2p-record v0.1.2/go.mod h1:pal0eNcT5nqZaTV7UGhqeGqxFgGdsU/9W//C8dqjQDk=
 github.com/libp2p/go-libp2p-record v0.1.3 h1:R27hoScIhQf/A8XJZ8lYpnqh9LatJ5YbHs28kCIfql0=
 github.com/libp2p/go-libp2p-record v0.1.3/go.mod h1:yNUff/adKIfPnYQXgp6FQmNu3gLJ6EMg7+/vv2+9pY4=
@@ -571,9 +567,8 @@ github.com/libp2p/zeroconf/v2 v2.0.0 h1:qYAHAqUVh4hMSfu+iDTZNqH07wLGAvb1+DW4Tx/q
 github.com/libp2p/zeroconf/v2 v2.0.0/go.mod h1:J85R/d9joD8u8F9aHM8pBXygtG9W02enEwS+wWeL6yo=
 github.com/lightstep/lightstep-tracer-common/golang/gogo v0.0.0-20190605223551-bc2310a04743/go.mod h1:qklhhLq1aX+mtWk9cPHPzaBjWImj5ULL6C7HFJtXQMM=
 github.com/lightstep/lightstep-tracer-go v0.18.1/go.mod h1:jlF1pusYV4pidLvZ+XD0UBX0ZE6WURAspgAczcDHrL4=
+github.com/lucas-clemente/quic-go v0.21.2 h1:8LqqL7nBQFDUINadW0fHV/xSaCQJgmJC0Gv+qUnjd78=
 github.com/lucas-clemente/quic-go v0.21.2/go.mod h1:vF5M1XqhBAHgbjKcJOXY3JZz3GP0T3FQhz/uyOUS38Q=
-github.com/lucas-clemente/quic-go v0.23.0 h1:5vFnKtZ6nHDFsc/F3uuiF4T3y/AXaQdxjUqiVw26GZE=
-github.com/lucas-clemente/quic-go v0.23.0/go.mod h1:paZuzjXCE5mj6sikVLMvqXk8lJV2AsqtJ6bDhjEfxx0=
 github.com/lunixbochs/vtclean v1.0.0/go.mod h1:pHhQNgMf3btfWnGBVipUOjRYhoOsdGqdm/+2c2E2WMI=
 github.com/lyft/protoc-gen-validate v0.0.13/go.mod h1:XbGvPuh87YZc5TdIa2/I4pLk0QoUACkjt2znoq26NVQ=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
@@ -581,12 +576,12 @@ github.com/mailru/easyjson v0.0.0-20180823135443-60711f1a8329/go.mod h1:C1wdFJiN
 github.com/mailru/easyjson v0.0.0-20190312143242-1de009706dbe/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
 github.com/marten-seemann/qpack v0.2.1/go.mod h1:F7Gl5L1jIgN1D11ucXefiuJS9UMVP2opoCp2jDKb7wc=
 github.com/marten-seemann/qtls-go1-15 v0.1.4/go.mod h1:GyFwywLKkRt+6mfU99csTEY1joMZz5vmB1WNZH3P81I=
+github.com/marten-seemann/qtls-go1-15 v0.1.5 h1:Ci4EIUN6Rlb+D6GmLdej/bCQ4nPYNtVXQB+xjiXE1nk=
 github.com/marten-seemann/qtls-go1-15 v0.1.5/go.mod h1:GyFwywLKkRt+6mfU99csTEY1joMZz5vmB1WNZH3P81I=
 github.com/marten-seemann/qtls-go1-16 v0.1.4 h1:xbHbOGGhrenVtII6Co8akhLEdrawwB2iHl5yhJRpnco=
 github.com/marten-seemann/qtls-go1-16 v0.1.4/go.mod h1:gNpI2Ol+lRS3WwSOtIUUtRwZEQMXjYK+dQSBFbethAk=
+github.com/marten-seemann/qtls-go1-17 v0.1.0-rc.1 h1:/rpmWuGvceLwwWuaKPdjpR4JJEUH0tq64/I3hvzaNLM=
 github.com/marten-seemann/qtls-go1-17 v0.1.0-rc.1/go.mod h1:fz4HIxByo+LlWcreM4CZOYNuz3taBQ8rN2X6FqvaWo8=
-github.com/marten-seemann/qtls-go1-17 v0.1.0 h1:P9ggrs5xtwiqXv/FHNwntmuLMNq3KaSIG93AtAZ48xk=
-github.com/marten-seemann/qtls-go1-17 v0.1.0/go.mod h1:fz4HIxByo+LlWcreM4CZOYNuz3taBQ8rN2X6FqvaWo8=
 github.com/marten-seemann/tcp v0.0.0-20210406111302-dfbc87cc63fd h1:br0buuQ854V8u83wA0rVZ8ttrq5CpaPZdvrK0LP2lOk=
 github.com/marten-seemann/tcp v0.0.0-20210406111302-dfbc87cc63fd/go.mod h1:QuCEs1Nt24+FYQEqAAncTDPJIuGs+LxK1MCiFL25pMU=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
@@ -983,7 +978,6 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180719180050-a680a1efc54d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
diff --git a/examples/libp2p-host/host.go b/examples/libp2p-host/host.go
index 00eb06f9..fcb768a6 100644
--- a/examples/libp2p-host/host.go
+++ b/examples/libp2p-host/host.go
@@ -12,6 +12,7 @@ import (
 	"github.com/libp2p/go-libp2p-core/routing"
 	dht "github.com/libp2p/go-libp2p-kad-dht"
 	noise "github.com/libp2p/go-libp2p-noise"
+	libp2pquic "github.com/libp2p/go-libp2p-quic-transport"
 	libp2ptls "github.com/libp2p/go-libp2p-tls"
 )
 
@@ -60,6 +61,8 @@ func run() {
 		libp2p.Security(libp2ptls.ID, libp2ptls.New),
 		// support noise connections
 		libp2p.Security(noise.ID, noise.New),
+		// support QUIC - experimental
+		libp2p.Transport(libp2pquic.NewTransport),
 		// support any other default transports (TCP)
 		libp2p.DefaultTransports,
 		// Let's prevent our peer from having too many
diff --git a/examples/pubsub/chat/go.sum b/examples/pubsub/chat/go.sum
index cd37156a..3f2a7baa 100644
--- a/examples/pubsub/chat/go.sum
+++ b/examples/pubsub/chat/go.sum
@@ -207,7 +207,6 @@ github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt
 github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
-github.com/golang/mock v1.6.0 h1:ErTB+efbowRARo13NNdxyJji2egdxLGQhRaY+DUumQc=
 github.com/golang/mock v1.6.0/go.mod h1:p6yTPP+5HYm5mzsMV8JkE6ZKdX+/wYM6Hr+LicevLPs=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
@@ -402,7 +401,6 @@ github.com/libp2p/go-addr-util v0.1.0/go.mod h1:6I3ZYuFr2O/9D+SoyM0zEw0EF3YkldtT
 github.com/libp2p/go-buffer-pool v0.0.1/go.mod h1:xtyIz9PMobb13WaxR6Zo1Pd1zXJKYg0a8KiIvDp3TzQ=
 github.com/libp2p/go-buffer-pool v0.0.2 h1:QNK2iAFa8gjAe1SPz6mHSMuCcjs+X1wlHzeOSqcmlfs=
 github.com/libp2p/go-buffer-pool v0.0.2/go.mod h1:MvaB6xw5vOrDl8rYZGLFdKAuk/hRoRZd1Vi32+RXyFM=
-github.com/libp2p/go-cidranger v1.1.0/go.mod h1:KWZTfSr+r9qEo9OkI9/SIEeAtw+NNoU0dXIXt15Okic=
 github.com/libp2p/go-conn-security-multistream v0.2.0/go.mod h1:hZN4MjlNetKD3Rq5Jb/P5ohUnFLNzEAR4DLSzpn2QLU=
 github.com/libp2p/go-conn-security-multistream v0.2.1 h1:ft6/POSK7F+vl/2qzegnHDaXFU0iWB4yVTYrioC6Zy0=
 github.com/libp2p/go-conn-security-multistream v0.2.1/go.mod h1:cR1d8gA0Hr59Fj6NhaTpFhJZrjSYuNmhpT2r25zYR70=
@@ -411,9 +409,8 @@ github.com/libp2p/go-eventbus v0.2.1/go.mod h1:jc2S4SoEVPP48H9Wpzm5aiGwUCBMfGhVh
 github.com/libp2p/go-flow-metrics v0.0.1/go.mod h1:Iv1GH0sG8DtYN3SVJ2eG221wMiNpZxBdp967ls1g+k8=
 github.com/libp2p/go-flow-metrics v0.0.3 h1:8tAs/hSdNvUiLgtlSy3mxwxWP4I9y/jlkPFT7epKdeM=
 github.com/libp2p/go-flow-metrics v0.0.3/go.mod h1:HeoSNUrOJVK1jEpDqVEiUOIXqhbnS27omG0uWU5slZs=
-github.com/libp2p/go-libp2p-asn-util v0.0.0-20210818120414-1f382a4aa43a/go.mod h1:wu+AnM9Ii2KgO5jMmS1rz9dvzTdj8BXqsPR9HR0XB7I=
-github.com/libp2p/go-libp2p-autonat v0.4.2 h1:YMp7StMi2dof+baaxkbxaizXjY1RPvU71CXfxExzcUU=
-github.com/libp2p/go-libp2p-autonat v0.4.2/go.mod h1:YxaJlpr81FhdOv3W3BTconZPfhaYivRdf53g+S2wobk=
+github.com/libp2p/go-libp2p-autonat v0.5.0 h1:/+3+4NcQV47DQ/duvRyFDP8oxv6CQTvSKYD5iWoPcYs=
+github.com/libp2p/go-libp2p-autonat v0.5.0/go.mod h1:085tmmuXn0nXgFwuF7a2tt4UxgTjuapbuml27v4htKY=
 github.com/libp2p/go-libp2p-blankhost v0.2.0 h1:3EsGAi0CBGcZ33GwRuXEYJLLPoVWyXJ1bcJzAJjINkk=
 github.com/libp2p/go-libp2p-blankhost v0.2.0/go.mod h1:eduNKXGTioTuQAUcZ5epXi9vMl+t4d8ugUBRQ4SqaNQ=
 github.com/libp2p/go-libp2p-circuit v0.4.0 h1:eqQ3sEYkGTtybWgr6JLqJY6QLtPWRErvFjFDfAOO1wc=
@@ -435,7 +432,6 @@ github.com/libp2p/go-libp2p-core v0.7.0/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJB
 github.com/libp2p/go-libp2p-core v0.8.0/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.1/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.2/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
-github.com/libp2p/go-libp2p-core v0.8.5/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.6/go.mod h1:dgHr0l0hIKfWpGpqAMbpo19pen9wJfdCGv51mTmdpmM=
 github.com/libp2p/go-libp2p-core v0.9.0 h1:t97Mv0LIBZlP2FXVRNKKVzHJCIjbIWGxYptGId4+htU=
 github.com/libp2p/go-libp2p-core v0.9.0/go.mod h1:ESsbz31oC3C1AvMJoGx26RTuCkNhmkSRCqZ0kQtJ2/8=
@@ -459,9 +455,8 @@ github.com/libp2p/go-libp2p-pnet v0.2.0 h1:J6htxttBipJujEjz1y0a5+eYoiPcFHhSYHH6n
 github.com/libp2p/go-libp2p-pnet v0.2.0/go.mod h1:Qqvq6JH/oMZGwqs3N1Fqhv8NVhrdYcO0BW4wssv21LA=
 github.com/libp2p/go-libp2p-pubsub v0.5.3 h1:XCn5xvgA/AKpbbaeqbomfKtQCbT9QsU39tYsVj0IndQ=
 github.com/libp2p/go-libp2p-pubsub v0.5.3/go.mod h1:gVOzwebXVdSMDQBTfH8ACO5EJ4SQrvsHqCmYsCZpD0E=
+github.com/libp2p/go-libp2p-quic-transport v0.11.2 h1:p1YQDZRHH4Cv2LPtHubqlQ9ggz4CKng/REZuXZbZMhM=
 github.com/libp2p/go-libp2p-quic-transport v0.11.2/go.mod h1:wlanzKtIh6pHrq+0U3p3DY9PJfGqxMgPaGKaK5LifwQ=
-github.com/libp2p/go-libp2p-quic-transport v0.12.0 h1:7IjDH4XNkmJbOMD+mxRloTe4LzMTq+vqvm2nYNL1N7M=
-github.com/libp2p/go-libp2p-quic-transport v0.12.0/go.mod h1:EKHqxZbWE/FhDJZ6ebyZ/4v3X9zyuuuKIN0XR9vANT0=
 github.com/libp2p/go-libp2p-swarm v0.2.8/go.mod h1:JQKMGSth4SMqonruY0a8yjlPVIkb0mdNSwckW7OYziM=
 github.com/libp2p/go-libp2p-swarm v0.3.0/go.mod h1:hdv95GWCTmzkgeJpP+GK/9D9puJegb7H57B5hWQR5Kk=
 github.com/libp2p/go-libp2p-swarm v0.5.3 h1:hsYaD/y6+kZff1o1Mc56NcuwSg80lIphTS/zDk3mO4M=
@@ -534,9 +529,8 @@ github.com/libp2p/zeroconf/v2 v2.0.0 h1:qYAHAqUVh4hMSfu+iDTZNqH07wLGAvb1+DW4Tx/q
 github.com/libp2p/zeroconf/v2 v2.0.0/go.mod h1:J85R/d9joD8u8F9aHM8pBXygtG9W02enEwS+wWeL6yo=
 github.com/lightstep/lightstep-tracer-common/golang/gogo v0.0.0-20190605223551-bc2310a04743/go.mod h1:qklhhLq1aX+mtWk9cPHPzaBjWImj5ULL6C7HFJtXQMM=
 github.com/lightstep/lightstep-tracer-go v0.18.1/go.mod h1:jlF1pusYV4pidLvZ+XD0UBX0ZE6WURAspgAczcDHrL4=
+github.com/lucas-clemente/quic-go v0.21.2 h1:8LqqL7nBQFDUINadW0fHV/xSaCQJgmJC0Gv+qUnjd78=
 github.com/lucas-clemente/quic-go v0.21.2/go.mod h1:vF5M1XqhBAHgbjKcJOXY3JZz3GP0T3FQhz/uyOUS38Q=
-github.com/lucas-clemente/quic-go v0.23.0 h1:5vFnKtZ6nHDFsc/F3uuiF4T3y/AXaQdxjUqiVw26GZE=
-github.com/lucas-clemente/quic-go v0.23.0/go.mod h1:paZuzjXCE5mj6sikVLMvqXk8lJV2AsqtJ6bDhjEfxx0=
 github.com/lucasb-eyer/go-colorful v1.0.3 h1:QIbQXiugsb+q10B+MI+7DI1oQLdmnep86tWFlaaUAac=
 github.com/lucasb-eyer/go-colorful v1.0.3/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/lunixbochs/vtclean v1.0.0/go.mod h1:pHhQNgMf3btfWnGBVipUOjRYhoOsdGqdm/+2c2E2WMI=
@@ -546,12 +540,12 @@ github.com/mailru/easyjson v0.0.0-20180823135443-60711f1a8329/go.mod h1:C1wdFJiN
 github.com/mailru/easyjson v0.0.0-20190312143242-1de009706dbe/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
 github.com/marten-seemann/qpack v0.2.1/go.mod h1:F7Gl5L1jIgN1D11ucXefiuJS9UMVP2opoCp2jDKb7wc=
 github.com/marten-seemann/qtls-go1-15 v0.1.4/go.mod h1:GyFwywLKkRt+6mfU99csTEY1joMZz5vmB1WNZH3P81I=
+github.com/marten-seemann/qtls-go1-15 v0.1.5 h1:Ci4EIUN6Rlb+D6GmLdej/bCQ4nPYNtVXQB+xjiXE1nk=
 github.com/marten-seemann/qtls-go1-15 v0.1.5/go.mod h1:GyFwywLKkRt+6mfU99csTEY1joMZz5vmB1WNZH3P81I=
 github.com/marten-seemann/qtls-go1-16 v0.1.4 h1:xbHbOGGhrenVtII6Co8akhLEdrawwB2iHl5yhJRpnco=
 github.com/marten-seemann/qtls-go1-16 v0.1.4/go.mod h1:gNpI2Ol+lRS3WwSOtIUUtRwZEQMXjYK+dQSBFbethAk=
+github.com/marten-seemann/qtls-go1-17 v0.1.0-rc.1 h1:/rpmWuGvceLwwWuaKPdjpR4JJEUH0tq64/I3hvzaNLM=
 github.com/marten-seemann/qtls-go1-17 v0.1.0-rc.1/go.mod h1:fz4HIxByo+LlWcreM4CZOYNuz3taBQ8rN2X6FqvaWo8=
-github.com/marten-seemann/qtls-go1-17 v0.1.0 h1:P9ggrs5xtwiqXv/FHNwntmuLMNq3KaSIG93AtAZ48xk=
-github.com/marten-seemann/qtls-go1-17 v0.1.0/go.mod h1:fz4HIxByo+LlWcreM4CZOYNuz3taBQ8rN2X6FqvaWo8=
 github.com/marten-seemann/tcp v0.0.0-20210406111302-dfbc87cc63fd h1:br0buuQ854V8u83wA0rVZ8ttrq5CpaPZdvrK0LP2lOk=
 github.com/marten-seemann/tcp v0.0.0-20210406111302-dfbc87cc63fd/go.mod h1:QuCEs1Nt24+FYQEqAAncTDPJIuGs+LxK1MCiFL25pMU=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
@@ -939,7 +933,6 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180719180050-a680a1efc54d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
diff --git a/go.mod b/go.mod
index 86d741b4..4deff6b4 100644
--- a/go.mod
+++ b/go.mod
@@ -12,17 +12,15 @@ require (
 	github.com/ipfs/go-datastore v0.4.6
 	github.com/ipfs/go-detect-race v0.0.1
 	github.com/ipfs/go-ipfs-util v0.0.2
-	github.com/ipfs/go-log v1.0.5
 	github.com/ipfs/go-log/v2 v2.3.0
+	github.com/jbenet/go-cienv v0.1.0
 	github.com/jbenet/goprocess v0.1.4
 	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
 	github.com/koron/go-ssdp v0.0.2 // indirect
 	github.com/libp2p/go-addr-util v0.1.0
-	github.com/libp2p/go-buffer-pool v0.0.2
 	github.com/libp2p/go-conn-security-multistream v0.2.1
 	github.com/libp2p/go-eventbus v0.2.1
-	github.com/libp2p/go-libp2p-asn-util v0.0.0-20210818120414-1f382a4aa43a
-	github.com/libp2p/go-libp2p-autonat v0.4.2
+	github.com/libp2p/go-libp2p-autonat v0.5.0
 	github.com/libp2p/go-libp2p-blankhost v0.2.0
 	github.com/libp2p/go-libp2p-circuit v0.4.0
 	github.com/libp2p/go-libp2p-core v0.9.0
@@ -32,7 +30,6 @@ require (
 	github.com/libp2p/go-libp2p-netutil v0.1.0
 	github.com/libp2p/go-libp2p-noise v0.2.2
 	github.com/libp2p/go-libp2p-peerstore v0.2.8
-	github.com/libp2p/go-libp2p-quic-transport v0.12.0
 	github.com/libp2p/go-libp2p-swarm v0.5.3
 	github.com/libp2p/go-libp2p-testing v0.4.2
 	github.com/libp2p/go-libp2p-tls v0.2.0
@@ -48,7 +45,6 @@ require (
 	github.com/multiformats/go-multiaddr v0.4.0
 	github.com/multiformats/go-multiaddr-dns v0.3.1
 	github.com/multiformats/go-multistream v0.2.2
-	github.com/multiformats/go-varint v0.0.6
 	github.com/prometheus/common v0.30.0 // indirect
 	github.com/prometheus/procfs v0.7.3 // indirect
 	github.com/stretchr/testify v1.7.0
diff --git a/go.sum b/go.sum
index a6456fe5..4a5aaa31 100644
--- a/go.sum
+++ b/go.sum
@@ -418,8 +418,6 @@ github.com/libp2p/go-addr-util v0.1.0/go.mod h1:6I3ZYuFr2O/9D+SoyM0zEw0EF3YkldtT
 github.com/libp2p/go-buffer-pool v0.0.1/go.mod h1:xtyIz9PMobb13WaxR6Zo1Pd1zXJKYg0a8KiIvDp3TzQ=
 github.com/libp2p/go-buffer-pool v0.0.2 h1:QNK2iAFa8gjAe1SPz6mHSMuCcjs+X1wlHzeOSqcmlfs=
 github.com/libp2p/go-buffer-pool v0.0.2/go.mod h1:MvaB6xw5vOrDl8rYZGLFdKAuk/hRoRZd1Vi32+RXyFM=
-github.com/libp2p/go-cidranger v1.1.0 h1:ewPN8EZ0dd1LSnrtuwd4709PXVcITVeuwbag38yPW7c=
-github.com/libp2p/go-cidranger v1.1.0/go.mod h1:KWZTfSr+r9qEo9OkI9/SIEeAtw+NNoU0dXIXt15Okic=
 github.com/libp2p/go-conn-security-multistream v0.1.0/go.mod h1:aw6eD7LOsHEX7+2hJkDxw1MteijaVcI+/eP2/x3J1xc=
 github.com/libp2p/go-conn-security-multistream v0.2.0/go.mod h1:hZN4MjlNetKD3Rq5Jb/P5ohUnFLNzEAR4DLSzpn2QLU=
 github.com/libp2p/go-conn-security-multistream v0.2.1 h1:ft6/POSK7F+vl/2qzegnHDaXFU0iWB4yVTYrioC6Zy0=
@@ -434,14 +432,12 @@ github.com/libp2p/go-libp2p v0.6.1/go.mod h1:CTFnWXogryAHjXAKEbOf1OWY+VeAP3lDMZk
 github.com/libp2p/go-libp2p v0.7.0/go.mod h1:hZJf8txWeCduQRDC/WSqBGMxaTHCOYHt2xSU1ivxn0k=
 github.com/libp2p/go-libp2p v0.7.4/go.mod h1:oXsBlTLF1q7pxr+9w6lqzS1ILpyHsaBPniVO7zIHGMw=
 github.com/libp2p/go-libp2p v0.8.1/go.mod h1:QRNH9pwdbEBpx5DTJYg+qxcVaDMAz3Ee/qDKwXujH5o=
-github.com/libp2p/go-libp2p-asn-util v0.0.0-20210818120414-1f382a4aa43a h1:6yEuCOY31elgeJ2KA2JiREZjIznvH6lOWCdHRuhgEgc=
-github.com/libp2p/go-libp2p-asn-util v0.0.0-20210818120414-1f382a4aa43a/go.mod h1:wu+AnM9Ii2KgO5jMmS1rz9dvzTdj8BXqsPR9HR0XB7I=
 github.com/libp2p/go-libp2p-autonat v0.1.1/go.mod h1:OXqkeGOY2xJVWKAGV2inNF5aKN/djNA3fdpCWloIudE=
 github.com/libp2p/go-libp2p-autonat v0.2.0/go.mod h1:DX+9teU4pEEoZUqR1PiMlqliONQdNbfzE1C718tcViI=
 github.com/libp2p/go-libp2p-autonat v0.2.1/go.mod h1:MWtAhV5Ko1l6QBsHQNSuM6b1sRkXrpk0/LqCr+vCVxI=
 github.com/libp2p/go-libp2p-autonat v0.2.2/go.mod h1:HsM62HkqZmHR2k1xgX34WuWDzk/nBwNHoeyyT4IWV6A=
-github.com/libp2p/go-libp2p-autonat v0.4.2 h1:YMp7StMi2dof+baaxkbxaizXjY1RPvU71CXfxExzcUU=
-github.com/libp2p/go-libp2p-autonat v0.4.2/go.mod h1:YxaJlpr81FhdOv3W3BTconZPfhaYivRdf53g+S2wobk=
+github.com/libp2p/go-libp2p-autonat v0.5.0 h1:/+3+4NcQV47DQ/duvRyFDP8oxv6CQTvSKYD5iWoPcYs=
+github.com/libp2p/go-libp2p-autonat v0.5.0/go.mod h1:085tmmuXn0nXgFwuF7a2tt4UxgTjuapbuml27v4htKY=
 github.com/libp2p/go-libp2p-blankhost v0.1.1/go.mod h1:pf2fvdLJPsC1FsVrNP3DUUvMzUts2dsLLBEpo1vW1ro=
 github.com/libp2p/go-libp2p-blankhost v0.1.4/go.mod h1:oJF0saYsAXQCSfDq254GMNmLNz6ZTHTOvtF4ZydUvwU=
 github.com/libp2p/go-libp2p-blankhost v0.2.0 h1:3EsGAi0CBGcZ33GwRuXEYJLLPoVWyXJ1bcJzAJjINkk=
@@ -469,7 +465,6 @@ github.com/libp2p/go-libp2p-core v0.7.0/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJB
 github.com/libp2p/go-libp2p-core v0.8.0/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.1/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.2/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
-github.com/libp2p/go-libp2p-core v0.8.5/go.mod h1:FfewUH/YpvWbEB+ZY9AQRQ4TAD8sJBt/G1rVvhz5XT8=
 github.com/libp2p/go-libp2p-core v0.8.6/go.mod h1:dgHr0l0hIKfWpGpqAMbpo19pen9wJfdCGv51mTmdpmM=
 github.com/libp2p/go-libp2p-core v0.9.0 h1:t97Mv0LIBZlP2FXVRNKKVzHJCIjbIWGxYptGId4+htU=
 github.com/libp2p/go-libp2p-core v0.9.0/go.mod h1:ESsbz31oC3C1AvMJoGx26RTuCkNhmkSRCqZ0kQtJ2/8=
@@ -503,9 +498,8 @@ github.com/libp2p/go-libp2p-peerstore v0.2.8 h1:nJghUlUkFVvyk7ccsM67oFA6kqUkwyCM
 github.com/libp2p/go-libp2p-peerstore v0.2.8/go.mod h1:gGiPlXdz7mIHd2vfAsHzBNAMqSDkt2UBFwgcITgw1lA=
 github.com/libp2p/go-libp2p-pnet v0.2.0 h1:J6htxttBipJujEjz1y0a5+eYoiPcFHhSYHH6na5f0/k=
 github.com/libp2p/go-libp2p-pnet v0.2.0/go.mod h1:Qqvq6JH/oMZGwqs3N1Fqhv8NVhrdYcO0BW4wssv21LA=
+github.com/libp2p/go-libp2p-quic-transport v0.11.2 h1:p1YQDZRHH4Cv2LPtHubqlQ9ggz4CKng/REZuXZbZMhM=
 github.com/libp2p/go-libp2p-quic-transport v0.11.2/go.mod h1:wlanzKtIh6pHrq+0U3p3DY9PJfGqxMgPaGKaK5LifwQ=
-github.com/libp2p/go-libp2p-quic-transport v0.12.0 h1:7IjDH4XNkmJbOMD+mxRloTe4LzMTq+vqvm2nYNL1N7M=
-github.com/libp2p/go-libp2p-quic-transport v0.12.0/go.mod h1:EKHqxZbWE/FhDJZ6ebyZ/4v3X9zyuuuKIN0XR9vANT0=
 github.com/libp2p/go-libp2p-secio v0.1.0/go.mod h1:tMJo2w7h3+wN4pgU2LSYeiKPrfqBgkOsdiKK77hE7c8=
 github.com/libp2p/go-libp2p-secio v0.2.0/go.mod h1:2JdZepB8J5V9mBp79BmwsaPQhRPNN2NrnB2lKQcdy6g=
 github.com/libp2p/go-libp2p-secio v0.2.1/go.mod h1:cWtZpILJqkqrSkiYcDBh5lA3wbT2Q+hz3rJQq3iftD8=
@@ -611,9 +605,8 @@ github.com/libp2p/zeroconf/v2 v2.0.0 h1:qYAHAqUVh4hMSfu+iDTZNqH07wLGAvb1+DW4Tx/q
 github.com/libp2p/zeroconf/v2 v2.0.0/go.mod h1:J85R/d9joD8u8F9aHM8pBXygtG9W02enEwS+wWeL6yo=
 github.com/lightstep/lightstep-tracer-common/golang/gogo v0.0.0-20190605223551-bc2310a04743/go.mod h1:qklhhLq1aX+mtWk9cPHPzaBjWImj5ULL6C7HFJtXQMM=
 github.com/lightstep/lightstep-tracer-go v0.18.1/go.mod h1:jlF1pusYV4pidLvZ+XD0UBX0ZE6WURAspgAczcDHrL4=
+github.com/lucas-clemente/quic-go v0.21.2 h1:8LqqL7nBQFDUINadW0fHV/xSaCQJgmJC0Gv+qUnjd78=
 github.com/lucas-clemente/quic-go v0.21.2/go.mod h1:vF5M1XqhBAHgbjKcJOXY3JZz3GP0T3FQhz/uyOUS38Q=
-github.com/lucas-clemente/quic-go v0.23.0 h1:5vFnKtZ6nHDFsc/F3uuiF4T3y/AXaQdxjUqiVw26GZE=
-github.com/lucas-clemente/quic-go v0.23.0/go.mod h1:paZuzjXCE5mj6sikVLMvqXk8lJV2AsqtJ6bDhjEfxx0=
 github.com/lunixbochs/vtclean v1.0.0/go.mod h1:pHhQNgMf3btfWnGBVipUOjRYhoOsdGqdm/+2c2E2WMI=
 github.com/lyft/protoc-gen-validate v0.0.13/go.mod h1:XbGvPuh87YZc5TdIa2/I4pLk0QoUACkjt2znoq26NVQ=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
@@ -621,12 +614,12 @@ github.com/mailru/easyjson v0.0.0-20180823135443-60711f1a8329/go.mod h1:C1wdFJiN
 github.com/mailru/easyjson v0.0.0-20190312143242-1de009706dbe/go.mod h1:C1wdFJiN94OJF2b5HbByQZoLdCWB1Yqtg26g4irojpc=
 github.com/marten-seemann/qpack v0.2.1/go.mod h1:F7Gl5L1jIgN1D11ucXefiuJS9UMVP2opoCp2jDKb7wc=
 github.com/marten-seemann/qtls-go1-15 v0.1.4/go.mod h1:GyFwywLKkRt+6mfU99csTEY1joMZz5vmB1WNZH3P81I=
+github.com/marten-seemann/qtls-go1-15 v0.1.5 h1:Ci4EIUN6Rlb+D6GmLdej/bCQ4nPYNtVXQB+xjiXE1nk=
 github.com/marten-seemann/qtls-go1-15 v0.1.5/go.mod h1:GyFwywLKkRt+6mfU99csTEY1joMZz5vmB1WNZH3P81I=
 github.com/marten-seemann/qtls-go1-16 v0.1.4 h1:xbHbOGGhrenVtII6Co8akhLEdrawwB2iHl5yhJRpnco=
 github.com/marten-seemann/qtls-go1-16 v0.1.4/go.mod h1:gNpI2Ol+lRS3WwSOtIUUtRwZEQMXjYK+dQSBFbethAk=
+github.com/marten-seemann/qtls-go1-17 v0.1.0-rc.1 h1:/rpmWuGvceLwwWuaKPdjpR4JJEUH0tq64/I3hvzaNLM=
 github.com/marten-seemann/qtls-go1-17 v0.1.0-rc.1/go.mod h1:fz4HIxByo+LlWcreM4CZOYNuz3taBQ8rN2X6FqvaWo8=
-github.com/marten-seemann/qtls-go1-17 v0.1.0 h1:P9ggrs5xtwiqXv/FHNwntmuLMNq3KaSIG93AtAZ48xk=
-github.com/marten-seemann/qtls-go1-17 v0.1.0/go.mod h1:fz4HIxByo+LlWcreM4CZOYNuz3taBQ8rN2X6FqvaWo8=
 github.com/marten-seemann/tcp v0.0.0-20210406111302-dfbc87cc63fd h1:br0buuQ854V8u83wA0rVZ8ttrq5CpaPZdvrK0LP2lOk=
 github.com/marten-seemann/tcp v0.0.0-20210406111302-dfbc87cc63fd/go.mod h1:QuCEs1Nt24+FYQEqAAncTDPJIuGs+LxK1MCiFL25pMU=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
@@ -1022,7 +1015,6 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180719180050-a680a1efc54d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
diff --git a/options.go b/options.go
index 2f76a4aa..75549d34 100644
--- a/options.go
+++ b/options.go
@@ -20,6 +20,7 @@ import (
 	"github.com/libp2p/go-libp2p/config"
 	bhost "github.com/libp2p/go-libp2p/p2p/host/basic"
 	autorelay "github.com/libp2p/go-libp2p/p2p/host/relay"
+	holepunch "github.com/libp2p/go-libp2p/p2p/protocol/holepunch"
 
 	ma "github.com/multiformats/go-multiaddr"
 	madns "github.com/multiformats/go-multiaddr-dns"
@@ -417,3 +418,42 @@ func MultiaddrResolver(rslv *madns.Resolver) Option {
 		return nil
 	}
 }
+
+// Experimental
+// EnableHolePunching enables NAT traversal by enabling NATT'd peers to both initiate and respond to hole punching attempts
+// to create direct/NAT-traversed connections with other peers. (default: disabled)
+//
+// Dependencies:
+//  * Relay (enabled by default)
+//
+// This subsystem performs two functions:
+//
+// 1. On receiving an inbound Relay connection, it attempts to create a direct connection with the remote peer
+//    by initiating and co-ordinating a hole punch over the Relayed connection.
+// 2. If a peer sees a request to co-ordinate a hole punch on an outbound Relay connection,
+//    it will participate in the hole-punch to create a direct connection with the remote peer.
+//
+// If the hole punch is successful, all new streams will thereafter be created on the hole-punched connection.
+// The Relayed connection will eventually be closed after a grace period.
+//
+// All existing indefinite long-lived streams on the Relayed connection will have to re-opened on the hole-punched connection by the user.
+// Users can make use of the `Connected`/`Disconnected` notifications emitted by the Network for this purpose.
+//
+// It is not mandatory but nice to also enable the `AutoRelay` option (See `EnableAutoRelay`)
+// so the peer can discover and connect to Relay servers  if it discovers that it is NATT'd and has private reachability via AutoNAT.
+// This will then enable it to advertise Relay addresses which can be used to accept inbound Relay connections to then co-ordinate
+// a hole punch.
+//
+// If `EnableAutoRelay` is configured and the user is confident that the peer has private reachability/is NATT'd,
+// the `ForceReachabilityPrivate` option can be configured to short-circuit reachability discovery via AutoNAT
+// so the peer can immediately start connecting to Relay servers.
+//
+// If `EnableAutoRelay` is configured, the `StaticRelays` option can be used to configure a static set of Relay servers
+// for `AutoRelay` to connect to so that it does not need to discover Relay servers via Routing.
+func EnableHolePunching(opts ...holepunch.Option) Option {
+	return func(cfg *Config) error {
+		cfg.EnableHolePunching = true
+		cfg.HolePunchingOptions = opts
+		return nil
+	}
+}
diff --git a/p2p/host/basic/basic_host.go b/p2p/host/basic/basic_host.go
index 580ef289..cd279cbf 100644
--- a/p2p/host/basic/basic_host.go
+++ b/p2p/host/basic/basic_host.go
@@ -19,6 +19,7 @@ import (
 	"github.com/libp2p/go-libp2p-core/peerstore"
 	"github.com/libp2p/go-libp2p-core/protocol"
 	"github.com/libp2p/go-libp2p-core/record"
+	"github.com/libp2p/go-libp2p/p2p/protocol/holepunch"
 
 	addrutil "github.com/libp2p/go-addr-util"
 	"github.com/libp2p/go-eventbus"
@@ -72,6 +73,7 @@ type BasicHost struct {
 	network    network.Network
 	mux        *msmux.MultistreamMuxer
 	ids        *identify.IDService
+	hps        *holepunch.Service
 	pings      *ping.PingService
 	natmgr     NATManager
 	maResolver *madns.Resolver
@@ -136,6 +138,11 @@ type HostOpts struct {
 
 	// DisableSignedPeerRecord disables the generation of Signed Peer Records on this host.
 	DisableSignedPeerRecord bool
+
+	// EnableHolePunching enables the peer to initiate/respond to hole punching attempts for NAT traversal.
+	EnableHolePunching bool
+	// HolePunchingOptions are options for the hole punching service
+	HolePunchingOptions []holepunch.Option
 }
 
 // NewHost constructs a new *BasicHost and activates it by attaching its stream and connection handlers to the given inet.Network.
@@ -208,6 +215,13 @@ func NewHost(ctx context.Context, n network.Network, opts *HostOpts) (*BasicHost
 		return nil, fmt.Errorf("failed to create Identify service: %s", err)
 	}
 
+	if opts.EnableHolePunching {
+		h.hps, err = holepunch.NewService(h, h.ids, opts.HolePunchingOptions...)
+		if err != nil {
+			return nil, fmt.Errorf("failed to create hole punch service: %w", err)
+		}
+	}
+
 	if uint64(opts.NegotiationTimeout) != 0 {
 		h.negtimeout = opts.NegotiationTimeout
 	}
@@ -610,7 +624,7 @@ func (h *BasicHost) NewStream(ctx context.Context, p peer.ID, pids ...protocol.I
 		}
 	case <-ctx.Done():
 		s.Reset()
-		// wait for the negotiation to cancel.
+		// wait for `SelectOneOf` to error out because of resetting the stream.
 		<-errCh
 		return nil, ctx.Err()
 	}
@@ -643,8 +657,11 @@ func (h *BasicHost) Connect(ctx context.Context, pi peer.AddrInfo) error {
 	// absorb addresses into peerstore
 	h.Peerstore().AddAddrs(pi.ID, pi.Addrs, peerstore.TempAddrTTL)
 
-	if h.Network().Connectedness(pi.ID) == network.Connected {
-		return nil
+	forceDirect, _ := network.GetForceDirectDial(ctx)
+	if !forceDirect {
+		if h.Network().Connectedness(pi.ID) == network.Connected {
+			return nil
+		}
 	}
 
 	resolved, err := h.resolveAddrs(ctx, h.Peerstore().PeerInfo(pi.ID))
@@ -987,6 +1004,13 @@ func (h *BasicHost) Close() error {
 		if h.ids != nil {
 			h.ids.Close()
 		}
+		if h.autoNat != nil {
+			h.autoNat.Close()
+		}
+
+		if h.hps != nil {
+			h.hps.Close()
+		}
 
 		_ = h.emitters.evtLocalProtocolsUpdated.Close()
 		_ = h.emitters.evtLocalAddrsUpdated.Close()
diff --git a/p2p/host/circuitv2/client/client.go b/p2p/host/circuitv2/client/client.go
deleted file mode 100644
index 60d7e758..00000000
--- a/p2p/host/circuitv2/client/client.go
+++ /dev/null
@@ -1,66 +0,0 @@
-package client
-
-import (
-	"context"
-	"sync"
-
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/proto"
-
-	"github.com/libp2p/go-libp2p-core/host"
-	"github.com/libp2p/go-libp2p-core/peer"
-
-	logging "github.com/ipfs/go-log"
-	tptu "github.com/libp2p/go-libp2p-transport-upgrader"
-)
-
-var log = logging.Logger("p2p-circuit")
-
-// Client implements the client-side of the p2p-circuit/v2 protocol:
-// - it implements dialing through v2 relays
-// - it listens for incoming connections through v2 relays.
-//
-// For backwards compatibility with v1 relays and older nodes, the client will
-// also accept relay connections through v1 relays and fallback dial peers using p2p-circuit/v1.
-// This allows us to use the v2 code as drop in replacement for v1 in a host without breaking
-// existing code and interoperability with older nodes.
-type Client struct {
-	ctx      context.Context
-	host     host.Host
-	upgrader *tptu.Upgrader
-
-	incoming chan accept
-
-	mx          sync.Mutex
-	activeDials map[peer.ID]*completion
-	hopCount    map[peer.ID]int
-}
-
-type accept struct {
-	conn          *Conn
-	writeResponse func() error
-}
-
-type completion struct {
-	ch    chan struct{}
-	relay peer.ID
-	err   error
-}
-
-// New constructs a new p2p-circuit/v2 client, attached to the given host and using the given
-// upgrader to perform connection upgrades.
-func New(ctx context.Context, h host.Host, upgrader *tptu.Upgrader) (*Client, error) {
-	return &Client{
-		ctx:         ctx,
-		host:        h,
-		upgrader:    upgrader,
-		incoming:    make(chan accept),
-		activeDials: make(map[peer.ID]*completion),
-		hopCount:    make(map[peer.ID]int),
-	}, nil
-}
-
-// Start registers the circuit (client) protocol stream handlers
-func (c *Client) Start() {
-	c.host.SetStreamHandler(proto.ProtoIDv1, c.handleStreamV1)
-	c.host.SetStreamHandler(proto.ProtoIDv2Stop, c.handleStreamV2)
-}
diff --git a/p2p/host/circuitv2/client/conn.go b/p2p/host/circuitv2/client/conn.go
deleted file mode 100644
index dc770768..00000000
--- a/p2p/host/circuitv2/client/conn.go
+++ /dev/null
@@ -1,145 +0,0 @@
-package client
-
-import (
-	"fmt"
-	"net"
-	"time"
-
-	"github.com/libp2p/go-libp2p-core/network"
-	"github.com/libp2p/go-libp2p-core/peer"
-
-	ma "github.com/multiformats/go-multiaddr"
-	manet "github.com/multiformats/go-multiaddr/net"
-)
-
-// HopTagWeight is the connection manager weight for connections carrying relay hop streams
-var HopTagWeight = 5
-
-type statLimitDuration struct{}
-type statLimitData struct{}
-
-var (
-	StatLimitDuration = statLimitDuration{}
-	StatLimitData     = statLimitData{}
-)
-
-type Conn struct {
-	stream network.Stream
-	remote peer.AddrInfo
-	stat   network.Stat
-
-	client *Client
-}
-
-type NetAddr struct {
-	Relay  string
-	Remote string
-}
-
-var _ net.Addr = (*NetAddr)(nil)
-
-func (n *NetAddr) Network() string {
-	return "libp2p-circuit-relay"
-}
-
-func (n *NetAddr) String() string {
-	return fmt.Sprintf("relay[%s-%s]", n.Remote, n.Relay)
-}
-
-// Conn interface
-var _ manet.Conn = (*Conn)(nil)
-
-func (c *Conn) Close() error {
-	c.untagHop()
-	return c.stream.Reset()
-}
-
-func (c *Conn) Read(buf []byte) (int, error) {
-	return c.stream.Read(buf)
-}
-
-func (c *Conn) Write(buf []byte) (int, error) {
-	return c.stream.Write(buf)
-}
-
-func (c *Conn) SetDeadline(t time.Time) error {
-	return c.stream.SetDeadline(t)
-}
-
-func (c *Conn) SetReadDeadline(t time.Time) error {
-	return c.stream.SetReadDeadline(t)
-}
-
-func (c *Conn) SetWriteDeadline(t time.Time) error {
-	return c.stream.SetWriteDeadline(t)
-}
-
-// TODO: is it okay to cast c.Conn().RemotePeer() into a multiaddr? might be "user input"
-func (c *Conn) RemoteMultiaddr() ma.Multiaddr {
-	// TODO: We should be able to do this directly without converting to/from a string.
-	relayAddr, err := ma.NewComponent(
-		ma.ProtocolWithCode(ma.P_P2P).Name,
-		c.stream.Conn().RemotePeer().Pretty(),
-	)
-	if err != nil {
-		panic(err)
-	}
-	return ma.Join(c.stream.Conn().RemoteMultiaddr(), relayAddr, circuitAddr)
-}
-
-func (c *Conn) LocalMultiaddr() ma.Multiaddr {
-	return c.stream.Conn().LocalMultiaddr()
-}
-
-func (c *Conn) LocalAddr() net.Addr {
-	na, err := manet.ToNetAddr(c.stream.Conn().LocalMultiaddr())
-	if err != nil {
-		log.Error("failed to convert local multiaddr to net addr:", err)
-		return nil
-	}
-	return na
-}
-
-func (c *Conn) RemoteAddr() net.Addr {
-	return &NetAddr{
-		Relay:  c.stream.Conn().RemotePeer().Pretty(),
-		Remote: c.remote.ID.Pretty(),
-	}
-}
-
-// ConnStat interface
-var _ network.ConnStat = (*Conn)(nil)
-
-func (c *Conn) Stat() network.Stat {
-	return c.stat
-}
-
-// tagHop tags the underlying relay connection so that it can be (somewhat) protected from the
-// connection manager as it is an important connection that proxies other connections.
-// This is handled here so that the user code doesnt need to bother with this and avoid
-// clown shoes situations where a high value peer connection is behind a relayed connection and it is
-// implicitly because the connection manager closed the underlying relay connection.
-func (c *Conn) tagHop() {
-	c.client.mx.Lock()
-	defer c.client.mx.Unlock()
-
-	p := c.stream.Conn().RemotePeer()
-	c.client.hopCount[p]++
-	if c.client.hopCount[p] == 1 {
-		c.client.host.ConnManager().TagPeer(p, "relay-hop-stream", HopTagWeight)
-	}
-}
-
-// untagHop removes the relay-hop-stream tag if necessary; it is invoked when a relayed connection
-// is closed.
-func (c *Conn) untagHop() {
-	c.client.mx.Lock()
-	defer c.client.mx.Unlock()
-
-	p := c.stream.Conn().RemotePeer()
-	c.client.hopCount[p]--
-	if c.client.hopCount[p] == 0 {
-		c.client.host.ConnManager().UntagPeer(p, "relay-hop-stream")
-		delete(c.client.hopCount, p)
-	}
-}
diff --git a/p2p/host/circuitv2/client/dial.go b/p2p/host/circuitv2/client/dial.go
deleted file mode 100644
index 535521fd..00000000
--- a/p2p/host/circuitv2/client/dial.go
+++ /dev/null
@@ -1,239 +0,0 @@
-package client
-
-import (
-	"context"
-	"fmt"
-	"time"
-
-	pbv1 "github.com/libp2p/go-libp2p-circuit/pb"
-	pbv2 "github.com/libp2p/go-libp2p/p2p/host/circuitv2/pb"
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/proto"
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/util"
-
-	"github.com/libp2p/go-libp2p-core/network"
-	"github.com/libp2p/go-libp2p-core/peer"
-	"github.com/libp2p/go-libp2p-core/peerstore"
-
-	ma "github.com/multiformats/go-multiaddr"
-)
-
-const maxMessageSize = 4096
-
-var DialTimeout = time.Minute
-var DialRelayTimeout = 5 * time.Second
-
-// relay protocol errors; used for signalling deduplication
-type relayError struct {
-	err string
-}
-
-func (e relayError) Error() string {
-	return e.err
-}
-
-func newRelayError(t string, args ...interface{}) error {
-	return relayError{err: fmt.Sprintf(t, args...)}
-}
-
-func isRelayError(err error) bool {
-	_, ok := err.(relayError)
-	return ok
-}
-
-// dialer
-func (c *Client) dial(ctx context.Context, a ma.Multiaddr, p peer.ID) (*Conn, error) {
-	// split /a/p2p-circuit/b into (/a, /p2p-circuit/b)
-	relayaddr, destaddr := ma.SplitFunc(a, func(c ma.Component) bool {
-		return c.Protocol().Code == ma.P_CIRCUIT
-	})
-
-	// If the address contained no /p2p-circuit part, the second part is nil.
-	if destaddr == nil {
-		return nil, fmt.Errorf("%s is not a relay address", a)
-	}
-
-	if relayaddr == nil {
-		return nil, fmt.Errorf("can't dial a p2p-circuit without specifying a relay: %s", a)
-	}
-
-	dinfo := peer.AddrInfo{ID: p}
-
-	// Strip the /p2p-circuit prefix from the destaddr so that we can pass the destination address
-	// (if present) for active relays
-	_, destaddr = ma.SplitFirst(destaddr)
-	if destaddr != nil {
-		dinfo.Addrs = append(dinfo.Addrs, destaddr)
-	}
-
-	rinfo, err := peer.AddrInfoFromP2pAddr(relayaddr)
-	if err != nil {
-		return nil, fmt.Errorf("error parsing relay multiaddr '%s': %w", relayaddr, err)
-	}
-
-	// deduplicate active relay dials to the same peer
-retry:
-	c.mx.Lock()
-	dedup, active := c.activeDials[p]
-	if !active {
-		dedup = &completion{ch: make(chan struct{}), relay: rinfo.ID}
-		c.activeDials[p] = dedup
-	}
-	c.mx.Unlock()
-
-	if active {
-		select {
-		case <-dedup.ch:
-			if dedup.err != nil {
-				if dedup.relay != rinfo.ID {
-					// different relay, retry
-					goto retry
-				}
-
-				if !isRelayError(dedup.err) {
-					// not a relay protocol error, retry
-					goto retry
-				}
-
-				// don't try the same relay if it failed to connect with a protocol error
-				return nil, fmt.Errorf("concurrent active dial through the same relay failed with a protocol error")
-			}
-
-			return nil, fmt.Errorf("concurrent active dial succeeded")
-
-		case <-ctx.Done():
-			return nil, ctx.Err()
-		}
-	}
-
-	conn, err := c.dialPeer(ctx, *rinfo, dinfo)
-
-	c.mx.Lock()
-	dedup.err = err
-	close(dedup.ch)
-	delete(c.activeDials, p)
-	c.mx.Unlock()
-
-	return conn, err
-}
-
-func (c *Client) dialPeer(ctx context.Context, relay, dest peer.AddrInfo) (*Conn, error) {
-	log.Debugf("dialing peer %s through relay %s", dest.ID, relay.ID)
-
-	if len(relay.Addrs) > 0 {
-		c.host.Peerstore().AddAddrs(relay.ID, relay.Addrs, peerstore.TempAddrTTL)
-	}
-
-	dialCtx, cancel := context.WithTimeout(ctx, DialRelayTimeout)
-	defer cancel()
-	s, err := c.host.NewStream(dialCtx, relay.ID, proto.ProtoIDv2Hop, proto.ProtoIDv1)
-	if err != nil {
-		return nil, fmt.Errorf("error opening hop stream to relay: %w", err)
-	}
-
-	switch s.Protocol() {
-	case proto.ProtoIDv2Hop:
-		return c.connectV2(s, dest)
-
-	case proto.ProtoIDv1:
-		return c.connectV1(s, dest)
-
-	default:
-		s.Reset()
-		return nil, fmt.Errorf("unexpected stream protocol: %s", s.Protocol())
-	}
-}
-
-func (c *Client) connectV2(s network.Stream, dest peer.AddrInfo) (*Conn, error) {
-	rd := util.NewDelimitedReader(s, maxMessageSize)
-	wr := util.NewDelimitedWriter(s)
-	defer rd.Close()
-
-	var msg pbv2.HopMessage
-
-	msg.Type = pbv2.HopMessage_CONNECT.Enum()
-	msg.Peer = util.PeerInfoToPeerV2(dest)
-
-	s.SetDeadline(time.Now().Add(DialTimeout))
-
-	err := wr.WriteMsg(&msg)
-	if err != nil {
-		s.Reset()
-		return nil, err
-	}
-
-	msg.Reset()
-
-	err = rd.ReadMsg(&msg)
-	if err != nil {
-		s.Reset()
-		return nil, err
-	}
-
-	s.SetDeadline(time.Time{})
-
-	if msg.GetType() != pbv2.HopMessage_STATUS {
-		s.Reset()
-		return nil, newRelayError("unexpected relay response; not a status message (%d)", msg.GetType())
-	}
-
-	status := msg.GetStatus()
-	if status != pbv2.Status_OK {
-		s.Reset()
-		return nil, newRelayError("error opening relay circuit: %s (%d)", pbv2.Status_name[int32(status)], status)
-	}
-
-	// check for a limit provided by the relay; if the limit is not nil, then this is a limited
-	// relay connection and we mark the connection as transient.
-	var stat network.Stat
-	if limit := msg.GetLimit(); limit != nil {
-		stat.Transient = true
-		stat.Extra = make(map[interface{}]interface{})
-		stat.Extra[StatLimitDuration] = time.Duration(limit.GetDuration()) * time.Second
-		stat.Extra[StatLimitData] = limit.GetData()
-	}
-
-	return &Conn{stream: s, remote: dest, stat: stat, client: c}, nil
-}
-
-func (c *Client) connectV1(s network.Stream, dest peer.AddrInfo) (*Conn, error) {
-	rd := util.NewDelimitedReader(s, maxMessageSize)
-	wr := util.NewDelimitedWriter(s)
-	defer rd.Close()
-
-	var msg pbv1.CircuitRelay
-
-	msg.Type = pbv1.CircuitRelay_HOP.Enum()
-	msg.SrcPeer = util.PeerInfoToPeerV1(c.host.Peerstore().PeerInfo(c.host.ID()))
-	msg.DstPeer = util.PeerInfoToPeerV1(dest)
-
-	s.SetDeadline(time.Now().Add(DialTimeout))
-
-	err := wr.WriteMsg(&msg)
-	if err != nil {
-		s.Reset()
-		return nil, err
-	}
-
-	msg.Reset()
-
-	err = rd.ReadMsg(&msg)
-	if err != nil {
-		s.Reset()
-		return nil, err
-	}
-
-	s.SetDeadline(time.Time{})
-
-	if msg.GetType() != pbv1.CircuitRelay_STATUS {
-		s.Reset()
-		return nil, newRelayError("unexpected relay response; not a status message (%d)", msg.GetType())
-	}
-
-	status := msg.GetCode()
-	if status != pbv1.CircuitRelay_SUCCESS {
-		s.Reset()
-		return nil, newRelayError("error opening relay circuit: %s (%d)", pbv1.CircuitRelay_Status_name[int32(status)], status)
-	}
-
-	return &Conn{stream: s, remote: dest, client: c}, nil
-}
diff --git a/p2p/host/circuitv2/client/handlers.go b/p2p/host/circuitv2/client/handlers.go
deleted file mode 100644
index 78704846..00000000
--- a/p2p/host/circuitv2/client/handlers.go
+++ /dev/null
@@ -1,172 +0,0 @@
-package client
-
-import (
-	"time"
-
-	pbv1 "github.com/libp2p/go-libp2p-circuit/pb"
-	pbv2 "github.com/libp2p/go-libp2p/p2p/host/circuitv2/pb"
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/util"
-
-	"github.com/libp2p/go-libp2p-core/network"
-)
-
-var (
-	StreamTimeout = 1 * time.Minute
-	AcceptTimeout = 10 * time.Second
-)
-
-func (c *Client) handleStreamV2(s network.Stream) {
-	log.Debugf("new relay/v2 stream from: %s", s.Conn().RemotePeer())
-
-	s.SetReadDeadline(time.Now().Add(StreamTimeout))
-
-	rd := util.NewDelimitedReader(s, maxMessageSize)
-	defer rd.Close()
-
-	writeResponse := func(status pbv2.Status) error {
-		wr := util.NewDelimitedWriter(s)
-
-		var msg pbv2.StopMessage
-		msg.Type = pbv2.StopMessage_STATUS.Enum()
-		msg.Status = status.Enum()
-
-		return wr.WriteMsg(&msg)
-	}
-
-	handleError := func(status pbv2.Status) {
-		log.Debugf("protocol error: %s (%d)", pbv2.Status_name[int32(status)], status)
-		err := writeResponse(status)
-		if err != nil {
-			s.Reset()
-			log.Debugf("error writing circuit response: %s", err.Error())
-		} else {
-			s.Close()
-		}
-	}
-
-	var msg pbv2.StopMessage
-
-	err := rd.ReadMsg(&msg)
-	if err != nil {
-		handleError(pbv2.Status_MALFORMED_MESSAGE)
-		return
-	}
-	// reset stream deadline as message has been read
-	s.SetReadDeadline(time.Time{})
-
-	if msg.GetType() != pbv2.StopMessage_CONNECT {
-		handleError(pbv2.Status_UNEXPECTED_MESSAGE)
-		return
-	}
-
-	src, err := util.PeerToPeerInfoV2(msg.GetPeer())
-	if err != nil {
-		handleError(pbv2.Status_MALFORMED_MESSAGE)
-		return
-	}
-
-	// check for a limit provided by the relay; if the limit is not nil, then this is a limited
-	// relay connection and we mark the connection as transient.
-	var stat network.Stat
-	if limit := msg.GetLimit(); limit != nil {
-		stat.Transient = true
-		stat.Extra = make(map[interface{}]interface{})
-		stat.Extra[StatLimitDuration] = time.Duration(limit.GetDuration()) * time.Second
-		stat.Extra[StatLimitData] = limit.GetData()
-	}
-
-	log.Debugf("incoming relay connection from: %s", src.ID)
-
-	select {
-	case c.incoming <- accept{
-		conn: &Conn{stream: s, remote: src, stat: stat, client: c},
-		writeResponse: func() error {
-			return writeResponse(pbv2.Status_OK)
-		},
-	}:
-	case <-time.After(AcceptTimeout):
-		handleError(pbv2.Status_CONNECTION_FAILED)
-	}
-}
-
-func (c *Client) handleStreamV1(s network.Stream) {
-	log.Debugf("new relay/v1 stream from: %s", s.Conn().RemotePeer())
-
-	s.SetReadDeadline(time.Now().Add(StreamTimeout))
-
-	rd := util.NewDelimitedReader(s, maxMessageSize)
-	defer rd.Close()
-
-	writeResponse := func(status pbv1.CircuitRelay_Status) error {
-		wr := util.NewDelimitedWriter(s)
-
-		var msg pbv1.CircuitRelay
-		msg.Type = pbv1.CircuitRelay_STATUS.Enum()
-		msg.Code = status.Enum()
-
-		return wr.WriteMsg(&msg)
-	}
-
-	handleError := func(status pbv1.CircuitRelay_Status) {
-		log.Debugf("protocol error: %s (%d)", pbv1.CircuitRelay_Status_name[int32(status)], status)
-		err := writeResponse(status)
-		if err != nil {
-			s.Reset()
-			log.Debugf("error writing circuit response: %s", err.Error())
-		} else {
-			s.Close()
-		}
-	}
-
-	var msg pbv1.CircuitRelay
-
-	err := rd.ReadMsg(&msg)
-	if err != nil {
-		handleError(pbv1.CircuitRelay_MALFORMED_MESSAGE)
-		return
-	}
-	// reset stream deadline as message has been read
-	s.SetReadDeadline(time.Time{})
-
-	switch msg.GetType() {
-	case pbv1.CircuitRelay_STOP:
-
-	case pbv1.CircuitRelay_HOP:
-		handleError(pbv1.CircuitRelay_HOP_CANT_SPEAK_RELAY)
-		return
-
-	case pbv1.CircuitRelay_CAN_HOP:
-		handleError(pbv1.CircuitRelay_HOP_CANT_SPEAK_RELAY)
-		return
-
-	default:
-		log.Debugf("unexpected relay handshake: %d", msg.GetType())
-		handleError(pbv1.CircuitRelay_MALFORMED_MESSAGE)
-		return
-	}
-
-	src, err := util.PeerToPeerInfoV1(msg.GetSrcPeer())
-	if err != nil {
-		handleError(pbv1.CircuitRelay_STOP_SRC_MULTIADDR_INVALID)
-		return
-	}
-
-	dst, err := util.PeerToPeerInfoV1(msg.GetDstPeer())
-	if err != nil || dst.ID != c.host.ID() {
-		handleError(pbv1.CircuitRelay_STOP_DST_MULTIADDR_INVALID)
-		return
-	}
-
-	log.Debugf("incoming relay connection from: %s", src.ID)
-
-	select {
-	case c.incoming <- accept{
-		conn: &Conn{stream: s, remote: src, client: c},
-		writeResponse: func() error {
-			return writeResponse(pbv1.CircuitRelay_SUCCESS)
-		},
-	}:
-	case <-time.After(AcceptTimeout):
-		handleError(pbv1.CircuitRelay_STOP_RELAY_REFUSED)
-	}
-}
diff --git a/p2p/host/circuitv2/client/listen.go b/p2p/host/circuitv2/client/listen.go
deleted file mode 100644
index fcfb9fa6..00000000
--- a/p2p/host/circuitv2/client/listen.go
+++ /dev/null
@@ -1,54 +0,0 @@
-package client
-
-import (
-	"net"
-
-	ma "github.com/multiformats/go-multiaddr"
-	manet "github.com/multiformats/go-multiaddr/net"
-)
-
-var _ manet.Listener = (*Listener)(nil)
-
-type Listener Client
-
-func (c *Client) Listener() *Listener {
-	return (*Listener)(c)
-}
-
-func (l *Listener) Accept() (manet.Conn, error) {
-	for {
-		select {
-		case evt := <-l.incoming:
-			err := evt.writeResponse()
-			if err != nil {
-				log.Debugf("error writing relay response: %s", err.Error())
-				evt.conn.stream.Reset()
-				continue
-			}
-
-			log.Debugf("accepted relay connection from %s through %s", evt.conn.remote.ID, evt.conn.RemoteMultiaddr())
-
-			evt.conn.tagHop()
-			return evt.conn, nil
-
-		case <-l.ctx.Done():
-			return nil, l.ctx.Err()
-		}
-	}
-}
-
-func (l *Listener) Addr() net.Addr {
-	return &NetAddr{
-		Relay:  "any",
-		Remote: "any",
-	}
-}
-
-func (l *Listener) Multiaddr() ma.Multiaddr {
-	return circuitAddr
-}
-
-func (l *Listener) Close() error {
-	// noop for now
-	return nil
-}
diff --git a/p2p/host/circuitv2/client/reservation.go b/p2p/host/circuitv2/client/reservation.go
deleted file mode 100644
index 479a1476..00000000
--- a/p2p/host/circuitv2/client/reservation.go
+++ /dev/null
@@ -1,122 +0,0 @@
-package client
-
-import (
-	"context"
-	"fmt"
-	"time"
-
-	pbv2 "github.com/libp2p/go-libp2p/p2p/host/circuitv2/pb"
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/proto"
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/util"
-
-	"github.com/libp2p/go-libp2p-core/host"
-	"github.com/libp2p/go-libp2p-core/peer"
-	"github.com/libp2p/go-libp2p-core/peerstore"
-	"github.com/libp2p/go-libp2p-core/record"
-
-	ma "github.com/multiformats/go-multiaddr"
-)
-
-var ReserveTimeout = time.Minute
-
-// Reservation is a struct carrying information about a relay/v2 slot reservation.
-type Reservation struct {
-	// Expiration is the expiration time of the reservation
-	Expiration time.Time
-	// Addrs contains the vouched public addresses of the reserving peer, which can be
-	// announced to the network
-	Addrs []ma.Multiaddr
-
-	// LimitDuration is the time limit for which the relay will keep a relayed connection
-	// open. If 0, there is no limit.
-	LimitDuration time.Duration
-	// LimitData is the number of bytes that the relay will relay in each direction before
-	// resetting a relayed connection.
-	LimitData uint64
-
-	// Voucher is a signed reservation voucher provided by the relay
-	Voucher *proto.ReservationVoucher
-}
-
-// Reserve reserves a slot in a relay and returns the reservation information.
-// Clients must reserve slots in order for the relay to relay connections to them.
-func Reserve(ctx context.Context, h host.Host, ai peer.AddrInfo) (*Reservation, error) {
-	if len(ai.Addrs) > 0 {
-		h.Peerstore().AddAddrs(ai.ID, ai.Addrs, peerstore.TempAddrTTL)
-	}
-
-	s, err := h.NewStream(ctx, ai.ID, proto.ProtoIDv2Hop)
-	if err != nil {
-		return nil, err
-	}
-	defer s.Close()
-
-	rd := util.NewDelimitedReader(s, maxMessageSize)
-	wr := util.NewDelimitedWriter(s)
-	defer rd.Close()
-
-	var msg pbv2.HopMessage
-	msg.Type = pbv2.HopMessage_RESERVE.Enum()
-
-	s.SetDeadline(time.Now().Add(ReserveTimeout))
-
-	if err := wr.WriteMsg(&msg); err != nil {
-		s.Reset()
-		return nil, fmt.Errorf("error writing reservation message: %w", err)
-	}
-
-	msg.Reset()
-
-	if err := rd.ReadMsg(&msg); err != nil {
-		s.Reset()
-		return nil, fmt.Errorf("error reading reservation response message: %w", err)
-	}
-
-	if msg.GetType() != pbv2.HopMessage_STATUS {
-		return nil, fmt.Errorf("unexpected relay response: not a status message (%d)", msg.GetType())
-	}
-
-	if status := msg.GetStatus(); status != pbv2.Status_OK {
-		return nil, fmt.Errorf("reservation failed: %s (%d)", pbv2.Status_name[int32(status)], status)
-	}
-
-	rsvp := msg.GetReservation()
-	if rsvp == nil {
-		return nil, fmt.Errorf("missing reservation info")
-	}
-
-	result := &Reservation{}
-	result.Expiration = time.Unix(int64(rsvp.GetExpire()), 0)
-
-	for _, ab := range rsvp.GetAddrs() {
-		a, err := ma.NewMultiaddrBytes(ab)
-		if err != nil {
-			log.Warnf("ignoring unparsable relay address: %s", err)
-			continue
-		}
-		result.Addrs = append(result.Addrs, a)
-	}
-
-	voucherBytes := rsvp.GetVoucher()
-	if voucherBytes != nil {
-		_, rec, err := record.ConsumeEnvelope(voucherBytes, proto.RecordDomain)
-		if err != nil {
-			return nil, fmt.Errorf("error consuming voucher envelope: %w", err)
-		}
-
-		voucher, ok := rec.(*proto.ReservationVoucher)
-		if !ok {
-			return nil, fmt.Errorf("unexpected voucher record type: %+T", rec)
-		}
-
-		result.Voucher = voucher
-	}
-
-	limit := msg.GetLimit()
-	if limit != nil {
-		result.LimitDuration = time.Duration(limit.GetDuration()) * time.Second
-		result.LimitData = limit.GetData()
-	}
-
-	return result, nil
-}
diff --git a/p2p/host/circuitv2/client/transport.go b/p2p/host/circuitv2/client/transport.go
deleted file mode 100644
index 406188cf..00000000
--- a/p2p/host/circuitv2/client/transport.go
+++ /dev/null
@@ -1,80 +0,0 @@
-package client
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/libp2p/go-libp2p-core/host"
-	"github.com/libp2p/go-libp2p-core/peer"
-	"github.com/libp2p/go-libp2p-core/transport"
-
-	tptu "github.com/libp2p/go-libp2p-transport-upgrader"
-	ma "github.com/multiformats/go-multiaddr"
-)
-
-var circuitProtocol = ma.ProtocolWithCode(ma.P_CIRCUIT)
-var circuitAddr = ma.Cast(circuitProtocol.VCode)
-
-// AddTransport constructs a new p2p-circuit/v2 client and adds it as a transport to the
-// host network
-func AddTransport(ctx context.Context, h host.Host, upgrader *tptu.Upgrader) error {
-	n, ok := h.Network().(transport.TransportNetwork)
-	if !ok {
-		return fmt.Errorf("%v is not a transport network", h.Network())
-	}
-
-	c, err := New(ctx, h, upgrader)
-	if err != nil {
-		return fmt.Errorf("error constructing circuit client: %w", err)
-	}
-
-	err = n.AddTransport(c)
-	if err != nil {
-		return fmt.Errorf("error adding circuit transport: %w", err)
-	}
-
-	err = n.Listen(circuitAddr)
-	if err != nil {
-		return fmt.Errorf("error listening to circuit addr: %w", err)
-	}
-
-	c.Start()
-
-	return nil
-}
-
-// Transport interface
-var _ transport.Transport = (*Client)(nil)
-
-func (c *Client) Dial(ctx context.Context, a ma.Multiaddr, p peer.ID) (transport.CapableConn, error) {
-	conn, err := c.dial(ctx, a, p)
-	if err != nil {
-		return nil, err
-	}
-
-	conn.tagHop()
-
-	return c.upgrader.UpgradeOutbound(ctx, c, conn, p)
-}
-
-func (c *Client) CanDial(addr ma.Multiaddr) bool {
-	_, err := addr.ValueForProtocol(ma.P_CIRCUIT)
-	return err == nil
-}
-
-func (c *Client) Listen(addr ma.Multiaddr) (transport.Listener, error) {
-	// TODO connect to the relay and reserve slot if specified
-	if _, err := addr.ValueForProtocol(ma.P_CIRCUIT); err != nil {
-		return nil, err
-	}
-
-	return c.upgrader.UpgradeListener(c, c.Listener()), nil
-}
-
-func (c *Client) Protocols() []int {
-	return []int{ma.P_CIRCUIT}
-}
-
-func (c *Client) Proxy() bool {
-	return true
-}
diff --git a/p2p/host/circuitv2/pb/circuit.pb.go b/p2p/host/circuitv2/pb/circuit.pb.go
deleted file mode 100644
index f908d0d7..00000000
--- a/p2p/host/circuitv2/pb/circuit.pb.go
+++ /dev/null
@@ -1,1766 +0,0 @@
-// Code generated by protoc-gen-gogo. DO NOT EDIT.
-// source: circuit.proto
-
-package circuit_pb
-
-import (
-	fmt "fmt"
-	github_com_gogo_protobuf_proto "github.com/gogo/protobuf/proto"
-	proto "github.com/gogo/protobuf/proto"
-	io "io"
-	math "math"
-	math_bits "math/bits"
-)
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
-
-type Status int32
-
-const (
-	Status_OK                      Status = 100
-	Status_RESERVATION_REFUSED     Status = 200
-	Status_RESOURCE_LIMIT_EXCEEDED Status = 201
-	Status_PERMISSION_DENIED       Status = 202
-	Status_CONNECTION_FAILED       Status = 203
-	Status_NO_RESERVATION          Status = 204
-	Status_MALFORMED_MESSAGE       Status = 400
-	Status_UNEXPECTED_MESSAGE      Status = 401
-)
-
-var Status_name = map[int32]string{
-	100: "OK",
-	200: "RESERVATION_REFUSED",
-	201: "RESOURCE_LIMIT_EXCEEDED",
-	202: "PERMISSION_DENIED",
-	203: "CONNECTION_FAILED",
-	204: "NO_RESERVATION",
-	400: "MALFORMED_MESSAGE",
-	401: "UNEXPECTED_MESSAGE",
-}
-
-var Status_value = map[string]int32{
-	"OK":                      100,
-	"RESERVATION_REFUSED":     200,
-	"RESOURCE_LIMIT_EXCEEDED": 201,
-	"PERMISSION_DENIED":       202,
-	"CONNECTION_FAILED":       203,
-	"NO_RESERVATION":          204,
-	"MALFORMED_MESSAGE":       400,
-	"UNEXPECTED_MESSAGE":      401,
-}
-
-func (x Status) Enum() *Status {
-	p := new(Status)
-	*p = x
-	return p
-}
-
-func (x Status) String() string {
-	return proto.EnumName(Status_name, int32(x))
-}
-
-func (x *Status) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(Status_value, data, "Status")
-	if err != nil {
-		return err
-	}
-	*x = Status(value)
-	return nil
-}
-
-func (Status) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_ed01bbc211f15e47, []int{0}
-}
-
-type HopMessage_Type int32
-
-const (
-	HopMessage_RESERVE HopMessage_Type = 0
-	HopMessage_CONNECT HopMessage_Type = 1
-	HopMessage_STATUS  HopMessage_Type = 2
-)
-
-var HopMessage_Type_name = map[int32]string{
-	0: "RESERVE",
-	1: "CONNECT",
-	2: "STATUS",
-}
-
-var HopMessage_Type_value = map[string]int32{
-	"RESERVE": 0,
-	"CONNECT": 1,
-	"STATUS":  2,
-}
-
-func (x HopMessage_Type) Enum() *HopMessage_Type {
-	p := new(HopMessage_Type)
-	*p = x
-	return p
-}
-
-func (x HopMessage_Type) String() string {
-	return proto.EnumName(HopMessage_Type_name, int32(x))
-}
-
-func (x *HopMessage_Type) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(HopMessage_Type_value, data, "HopMessage_Type")
-	if err != nil {
-		return err
-	}
-	*x = HopMessage_Type(value)
-	return nil
-}
-
-func (HopMessage_Type) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_ed01bbc211f15e47, []int{0, 0}
-}
-
-type StopMessage_Type int32
-
-const (
-	StopMessage_CONNECT StopMessage_Type = 0
-	StopMessage_STATUS  StopMessage_Type = 1
-)
-
-var StopMessage_Type_name = map[int32]string{
-	0: "CONNECT",
-	1: "STATUS",
-}
-
-var StopMessage_Type_value = map[string]int32{
-	"CONNECT": 0,
-	"STATUS":  1,
-}
-
-func (x StopMessage_Type) Enum() *StopMessage_Type {
-	p := new(StopMessage_Type)
-	*p = x
-	return p
-}
-
-func (x StopMessage_Type) String() string {
-	return proto.EnumName(StopMessage_Type_name, int32(x))
-}
-
-func (x *StopMessage_Type) UnmarshalJSON(data []byte) error {
-	value, err := proto.UnmarshalJSONEnum(StopMessage_Type_value, data, "StopMessage_Type")
-	if err != nil {
-		return err
-	}
-	*x = StopMessage_Type(value)
-	return nil
-}
-
-func (StopMessage_Type) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_ed01bbc211f15e47, []int{1, 0}
-}
-
-type HopMessage struct {
-	Type                 *HopMessage_Type `protobuf:"varint,1,req,name=type,enum=circuit.pb.HopMessage_Type" json:"type,omitempty"`
-	Peer                 *Peer            `protobuf:"bytes,2,opt,name=peer" json:"peer,omitempty"`
-	Reservation          *Reservation     `protobuf:"bytes,3,opt,name=reservation" json:"reservation,omitempty"`
-	Limit                *Limit           `protobuf:"bytes,4,opt,name=limit" json:"limit,omitempty"`
-	Status               *Status          `protobuf:"varint,5,opt,name=status,enum=circuit.pb.Status" json:"status,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}         `json:"-"`
-	XXX_unrecognized     []byte           `json:"-"`
-	XXX_sizecache        int32            `json:"-"`
-}
-
-func (m *HopMessage) Reset()         { *m = HopMessage{} }
-func (m *HopMessage) String() string { return proto.CompactTextString(m) }
-func (*HopMessage) ProtoMessage()    {}
-func (*HopMessage) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ed01bbc211f15e47, []int{0}
-}
-func (m *HopMessage) XXX_Unmarshal(b []byte) error {
-	return m.Unmarshal(b)
-}
-func (m *HopMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	if deterministic {
-		return xxx_messageInfo_HopMessage.Marshal(b, m, deterministic)
-	} else {
-		b = b[:cap(b)]
-		n, err := m.MarshalToSizedBuffer(b)
-		if err != nil {
-			return nil, err
-		}
-		return b[:n], nil
-	}
-}
-func (m *HopMessage) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_HopMessage.Merge(m, src)
-}
-func (m *HopMessage) XXX_Size() int {
-	return m.Size()
-}
-func (m *HopMessage) XXX_DiscardUnknown() {
-	xxx_messageInfo_HopMessage.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_HopMessage proto.InternalMessageInfo
-
-func (m *HopMessage) GetType() HopMessage_Type {
-	if m != nil && m.Type != nil {
-		return *m.Type
-	}
-	return HopMessage_RESERVE
-}
-
-func (m *HopMessage) GetPeer() *Peer {
-	if m != nil {
-		return m.Peer
-	}
-	return nil
-}
-
-func (m *HopMessage) GetReservation() *Reservation {
-	if m != nil {
-		return m.Reservation
-	}
-	return nil
-}
-
-func (m *HopMessage) GetLimit() *Limit {
-	if m != nil {
-		return m.Limit
-	}
-	return nil
-}
-
-func (m *HopMessage) GetStatus() Status {
-	if m != nil && m.Status != nil {
-		return *m.Status
-	}
-	return Status_OK
-}
-
-type StopMessage struct {
-	Type                 *StopMessage_Type `protobuf:"varint,1,req,name=type,enum=circuit.pb.StopMessage_Type" json:"type,omitempty"`
-	Peer                 *Peer             `protobuf:"bytes,2,opt,name=peer" json:"peer,omitempty"`
-	Limit                *Limit            `protobuf:"bytes,3,opt,name=limit" json:"limit,omitempty"`
-	Status               *Status           `protobuf:"varint,4,opt,name=status,enum=circuit.pb.Status" json:"status,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
-	XXX_unrecognized     []byte            `json:"-"`
-	XXX_sizecache        int32             `json:"-"`
-}
-
-func (m *StopMessage) Reset()         { *m = StopMessage{} }
-func (m *StopMessage) String() string { return proto.CompactTextString(m) }
-func (*StopMessage) ProtoMessage()    {}
-func (*StopMessage) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ed01bbc211f15e47, []int{1}
-}
-func (m *StopMessage) XXX_Unmarshal(b []byte) error {
-	return m.Unmarshal(b)
-}
-func (m *StopMessage) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	if deterministic {
-		return xxx_messageInfo_StopMessage.Marshal(b, m, deterministic)
-	} else {
-		b = b[:cap(b)]
-		n, err := m.MarshalToSizedBuffer(b)
-		if err != nil {
-			return nil, err
-		}
-		return b[:n], nil
-	}
-}
-func (m *StopMessage) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_StopMessage.Merge(m, src)
-}
-func (m *StopMessage) XXX_Size() int {
-	return m.Size()
-}
-func (m *StopMessage) XXX_DiscardUnknown() {
-	xxx_messageInfo_StopMessage.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_StopMessage proto.InternalMessageInfo
-
-func (m *StopMessage) GetType() StopMessage_Type {
-	if m != nil && m.Type != nil {
-		return *m.Type
-	}
-	return StopMessage_CONNECT
-}
-
-func (m *StopMessage) GetPeer() *Peer {
-	if m != nil {
-		return m.Peer
-	}
-	return nil
-}
-
-func (m *StopMessage) GetLimit() *Limit {
-	if m != nil {
-		return m.Limit
-	}
-	return nil
-}
-
-func (m *StopMessage) GetStatus() Status {
-	if m != nil && m.Status != nil {
-		return *m.Status
-	}
-	return Status_OK
-}
-
-type Peer struct {
-	Id                   []byte   `protobuf:"bytes,1,req,name=id" json:"id,omitempty"`
-	Addrs                [][]byte `protobuf:"bytes,2,rep,name=addrs" json:"addrs,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *Peer) Reset()         { *m = Peer{} }
-func (m *Peer) String() string { return proto.CompactTextString(m) }
-func (*Peer) ProtoMessage()    {}
-func (*Peer) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ed01bbc211f15e47, []int{2}
-}
-func (m *Peer) XXX_Unmarshal(b []byte) error {
-	return m.Unmarshal(b)
-}
-func (m *Peer) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	if deterministic {
-		return xxx_messageInfo_Peer.Marshal(b, m, deterministic)
-	} else {
-		b = b[:cap(b)]
-		n, err := m.MarshalToSizedBuffer(b)
-		if err != nil {
-			return nil, err
-		}
-		return b[:n], nil
-	}
-}
-func (m *Peer) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Peer.Merge(m, src)
-}
-func (m *Peer) XXX_Size() int {
-	return m.Size()
-}
-func (m *Peer) XXX_DiscardUnknown() {
-	xxx_messageInfo_Peer.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_Peer proto.InternalMessageInfo
-
-func (m *Peer) GetId() []byte {
-	if m != nil {
-		return m.Id
-	}
-	return nil
-}
-
-func (m *Peer) GetAddrs() [][]byte {
-	if m != nil {
-		return m.Addrs
-	}
-	return nil
-}
-
-type Reservation struct {
-	Expire               *uint64  `protobuf:"varint,1,opt,name=expire" json:"expire,omitempty"`
-	Addrs                [][]byte `protobuf:"bytes,2,rep,name=addrs" json:"addrs,omitempty"`
-	Voucher              []byte   `protobuf:"bytes,3,opt,name=voucher" json:"voucher,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *Reservation) Reset()         { *m = Reservation{} }
-func (m *Reservation) String() string { return proto.CompactTextString(m) }
-func (*Reservation) ProtoMessage()    {}
-func (*Reservation) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ed01bbc211f15e47, []int{3}
-}
-func (m *Reservation) XXX_Unmarshal(b []byte) error {
-	return m.Unmarshal(b)
-}
-func (m *Reservation) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	if deterministic {
-		return xxx_messageInfo_Reservation.Marshal(b, m, deterministic)
-	} else {
-		b = b[:cap(b)]
-		n, err := m.MarshalToSizedBuffer(b)
-		if err != nil {
-			return nil, err
-		}
-		return b[:n], nil
-	}
-}
-func (m *Reservation) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Reservation.Merge(m, src)
-}
-func (m *Reservation) XXX_Size() int {
-	return m.Size()
-}
-func (m *Reservation) XXX_DiscardUnknown() {
-	xxx_messageInfo_Reservation.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_Reservation proto.InternalMessageInfo
-
-func (m *Reservation) GetExpire() uint64 {
-	if m != nil && m.Expire != nil {
-		return *m.Expire
-	}
-	return 0
-}
-
-func (m *Reservation) GetAddrs() [][]byte {
-	if m != nil {
-		return m.Addrs
-	}
-	return nil
-}
-
-func (m *Reservation) GetVoucher() []byte {
-	if m != nil {
-		return m.Voucher
-	}
-	return nil
-}
-
-type Limit struct {
-	Duration             *uint32  `protobuf:"varint,1,opt,name=duration" json:"duration,omitempty"`
-	Data                 *uint64  `protobuf:"varint,2,opt,name=data" json:"data,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *Limit) Reset()         { *m = Limit{} }
-func (m *Limit) String() string { return proto.CompactTextString(m) }
-func (*Limit) ProtoMessage()    {}
-func (*Limit) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ed01bbc211f15e47, []int{4}
-}
-func (m *Limit) XXX_Unmarshal(b []byte) error {
-	return m.Unmarshal(b)
-}
-func (m *Limit) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	if deterministic {
-		return xxx_messageInfo_Limit.Marshal(b, m, deterministic)
-	} else {
-		b = b[:cap(b)]
-		n, err := m.MarshalToSizedBuffer(b)
-		if err != nil {
-			return nil, err
-		}
-		return b[:n], nil
-	}
-}
-func (m *Limit) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_Limit.Merge(m, src)
-}
-func (m *Limit) XXX_Size() int {
-	return m.Size()
-}
-func (m *Limit) XXX_DiscardUnknown() {
-	xxx_messageInfo_Limit.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_Limit proto.InternalMessageInfo
-
-func (m *Limit) GetDuration() uint32 {
-	if m != nil && m.Duration != nil {
-		return *m.Duration
-	}
-	return 0
-}
-
-func (m *Limit) GetData() uint64 {
-	if m != nil && m.Data != nil {
-		return *m.Data
-	}
-	return 0
-}
-
-func init() {
-	proto.RegisterEnum("circuit.pb.Status", Status_name, Status_value)
-	proto.RegisterEnum("circuit.pb.HopMessage_Type", HopMessage_Type_name, HopMessage_Type_value)
-	proto.RegisterEnum("circuit.pb.StopMessage_Type", StopMessage_Type_name, StopMessage_Type_value)
-	proto.RegisterType((*HopMessage)(nil), "circuit.pb.HopMessage")
-	proto.RegisterType((*StopMessage)(nil), "circuit.pb.StopMessage")
-	proto.RegisterType((*Peer)(nil), "circuit.pb.Peer")
-	proto.RegisterType((*Reservation)(nil), "circuit.pb.Reservation")
-	proto.RegisterType((*Limit)(nil), "circuit.pb.Limit")
-}
-
-func init() { proto.RegisterFile("circuit.proto", fileDescriptor_ed01bbc211f15e47) }
-
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-}
-
-func (m *HopMessage) Marshal() (dAtA []byte, err error) {
-	size := m.Size()
-	dAtA = make([]byte, size)
-	n, err := m.MarshalToSizedBuffer(dAtA[:size])
-	if err != nil {
-		return nil, err
-	}
-	return dAtA[:n], nil
-}
-
-func (m *HopMessage) MarshalTo(dAtA []byte) (int, error) {
-	size := m.Size()
-	return m.MarshalToSizedBuffer(dAtA[:size])
-}
-
-func (m *HopMessage) MarshalToSizedBuffer(dAtA []byte) (int, error) {
-	i := len(dAtA)
-	_ = i
-	var l int
-	_ = l
-	if m.XXX_unrecognized != nil {
-		i -= len(m.XXX_unrecognized)
-		copy(dAtA[i:], m.XXX_unrecognized)
-	}
-	if m.Status != nil {
-		i = encodeVarintCircuit(dAtA, i, uint64(*m.Status))
-		i--
-		dAtA[i] = 0x28
-	}
-	if m.Limit != nil {
-		{
-			size, err := m.Limit.MarshalToSizedBuffer(dAtA[:i])
-			if err != nil {
-				return 0, err
-			}
-			i -= size
-			i = encodeVarintCircuit(dAtA, i, uint64(size))
-		}
-		i--
-		dAtA[i] = 0x22
-	}
-	if m.Reservation != nil {
-		{
-			size, err := m.Reservation.MarshalToSizedBuffer(dAtA[:i])
-			if err != nil {
-				return 0, err
-			}
-			i -= size
-			i = encodeVarintCircuit(dAtA, i, uint64(size))
-		}
-		i--
-		dAtA[i] = 0x1a
-	}
-	if m.Peer != nil {
-		{
-			size, err := m.Peer.MarshalToSizedBuffer(dAtA[:i])
-			if err != nil {
-				return 0, err
-			}
-			i -= size
-			i = encodeVarintCircuit(dAtA, i, uint64(size))
-		}
-		i--
-		dAtA[i] = 0x12
-	}
-	if m.Type == nil {
-		return 0, github_com_gogo_protobuf_proto.NewRequiredNotSetError("type")
-	} else {
-		i = encodeVarintCircuit(dAtA, i, uint64(*m.Type))
-		i--
-		dAtA[i] = 0x8
-	}
-	return len(dAtA) - i, nil
-}
-
-func (m *StopMessage) Marshal() (dAtA []byte, err error) {
-	size := m.Size()
-	dAtA = make([]byte, size)
-	n, err := m.MarshalToSizedBuffer(dAtA[:size])
-	if err != nil {
-		return nil, err
-	}
-	return dAtA[:n], nil
-}
-
-func (m *StopMessage) MarshalTo(dAtA []byte) (int, error) {
-	size := m.Size()
-	return m.MarshalToSizedBuffer(dAtA[:size])
-}
-
-func (m *StopMessage) MarshalToSizedBuffer(dAtA []byte) (int, error) {
-	i := len(dAtA)
-	_ = i
-	var l int
-	_ = l
-	if m.XXX_unrecognized != nil {
-		i -= len(m.XXX_unrecognized)
-		copy(dAtA[i:], m.XXX_unrecognized)
-	}
-	if m.Status != nil {
-		i = encodeVarintCircuit(dAtA, i, uint64(*m.Status))
-		i--
-		dAtA[i] = 0x20
-	}
-	if m.Limit != nil {
-		{
-			size, err := m.Limit.MarshalToSizedBuffer(dAtA[:i])
-			if err != nil {
-				return 0, err
-			}
-			i -= size
-			i = encodeVarintCircuit(dAtA, i, uint64(size))
-		}
-		i--
-		dAtA[i] = 0x1a
-	}
-	if m.Peer != nil {
-		{
-			size, err := m.Peer.MarshalToSizedBuffer(dAtA[:i])
-			if err != nil {
-				return 0, err
-			}
-			i -= size
-			i = encodeVarintCircuit(dAtA, i, uint64(size))
-		}
-		i--
-		dAtA[i] = 0x12
-	}
-	if m.Type == nil {
-		return 0, github_com_gogo_protobuf_proto.NewRequiredNotSetError("type")
-	} else {
-		i = encodeVarintCircuit(dAtA, i, uint64(*m.Type))
-		i--
-		dAtA[i] = 0x8
-	}
-	return len(dAtA) - i, nil
-}
-
-func (m *Peer) Marshal() (dAtA []byte, err error) {
-	size := m.Size()
-	dAtA = make([]byte, size)
-	n, err := m.MarshalToSizedBuffer(dAtA[:size])
-	if err != nil {
-		return nil, err
-	}
-	return dAtA[:n], nil
-}
-
-func (m *Peer) MarshalTo(dAtA []byte) (int, error) {
-	size := m.Size()
-	return m.MarshalToSizedBuffer(dAtA[:size])
-}
-
-func (m *Peer) MarshalToSizedBuffer(dAtA []byte) (int, error) {
-	i := len(dAtA)
-	_ = i
-	var l int
-	_ = l
-	if m.XXX_unrecognized != nil {
-		i -= len(m.XXX_unrecognized)
-		copy(dAtA[i:], m.XXX_unrecognized)
-	}
-	if len(m.Addrs) > 0 {
-		for iNdEx := len(m.Addrs) - 1; iNdEx >= 0; iNdEx-- {
-			i -= len(m.Addrs[iNdEx])
-			copy(dAtA[i:], m.Addrs[iNdEx])
-			i = encodeVarintCircuit(dAtA, i, uint64(len(m.Addrs[iNdEx])))
-			i--
-			dAtA[i] = 0x12
-		}
-	}
-	if m.Id == nil {
-		return 0, github_com_gogo_protobuf_proto.NewRequiredNotSetError("id")
-	} else {
-		i -= len(m.Id)
-		copy(dAtA[i:], m.Id)
-		i = encodeVarintCircuit(dAtA, i, uint64(len(m.Id)))
-		i--
-		dAtA[i] = 0xa
-	}
-	return len(dAtA) - i, nil
-}
-
-func (m *Reservation) Marshal() (dAtA []byte, err error) {
-	size := m.Size()
-	dAtA = make([]byte, size)
-	n, err := m.MarshalToSizedBuffer(dAtA[:size])
-	if err != nil {
-		return nil, err
-	}
-	return dAtA[:n], nil
-}
-
-func (m *Reservation) MarshalTo(dAtA []byte) (int, error) {
-	size := m.Size()
-	return m.MarshalToSizedBuffer(dAtA[:size])
-}
-
-func (m *Reservation) MarshalToSizedBuffer(dAtA []byte) (int, error) {
-	i := len(dAtA)
-	_ = i
-	var l int
-	_ = l
-	if m.XXX_unrecognized != nil {
-		i -= len(m.XXX_unrecognized)
-		copy(dAtA[i:], m.XXX_unrecognized)
-	}
-	if m.Voucher != nil {
-		i -= len(m.Voucher)
-		copy(dAtA[i:], m.Voucher)
-		i = encodeVarintCircuit(dAtA, i, uint64(len(m.Voucher)))
-		i--
-		dAtA[i] = 0x1a
-	}
-	if len(m.Addrs) > 0 {
-		for iNdEx := len(m.Addrs) - 1; iNdEx >= 0; iNdEx-- {
-			i -= len(m.Addrs[iNdEx])
-			copy(dAtA[i:], m.Addrs[iNdEx])
-			i = encodeVarintCircuit(dAtA, i, uint64(len(m.Addrs[iNdEx])))
-			i--
-			dAtA[i] = 0x12
-		}
-	}
-	if m.Expire != nil {
-		i = encodeVarintCircuit(dAtA, i, uint64(*m.Expire))
-		i--
-		dAtA[i] = 0x8
-	}
-	return len(dAtA) - i, nil
-}
-
-func (m *Limit) Marshal() (dAtA []byte, err error) {
-	size := m.Size()
-	dAtA = make([]byte, size)
-	n, err := m.MarshalToSizedBuffer(dAtA[:size])
-	if err != nil {
-		return nil, err
-	}
-	return dAtA[:n], nil
-}
-
-func (m *Limit) MarshalTo(dAtA []byte) (int, error) {
-	size := m.Size()
-	return m.MarshalToSizedBuffer(dAtA[:size])
-}
-
-func (m *Limit) MarshalToSizedBuffer(dAtA []byte) (int, error) {
-	i := len(dAtA)
-	_ = i
-	var l int
-	_ = l
-	if m.XXX_unrecognized != nil {
-		i -= len(m.XXX_unrecognized)
-		copy(dAtA[i:], m.XXX_unrecognized)
-	}
-	if m.Data != nil {
-		i = encodeVarintCircuit(dAtA, i, uint64(*m.Data))
-		i--
-		dAtA[i] = 0x10
-	}
-	if m.Duration != nil {
-		i = encodeVarintCircuit(dAtA, i, uint64(*m.Duration))
-		i--
-		dAtA[i] = 0x8
-	}
-	return len(dAtA) - i, nil
-}
-
-func encodeVarintCircuit(dAtA []byte, offset int, v uint64) int {
-	offset -= sovCircuit(v)
-	base := offset
-	for v >= 1<<7 {
-		dAtA[offset] = uint8(v&0x7f | 0x80)
-		v >>= 7
-		offset++
-	}
-	dAtA[offset] = uint8(v)
-	return base
-}
-func (m *HopMessage) Size() (n int) {
-	if m == nil {
-		return 0
-	}
-	var l int
-	_ = l
-	if m.Type != nil {
-		n += 1 + sovCircuit(uint64(*m.Type))
-	}
-	if m.Peer != nil {
-		l = m.Peer.Size()
-		n += 1 + l + sovCircuit(uint64(l))
-	}
-	if m.Reservation != nil {
-		l = m.Reservation.Size()
-		n += 1 + l + sovCircuit(uint64(l))
-	}
-	if m.Limit != nil {
-		l = m.Limit.Size()
-		n += 1 + l + sovCircuit(uint64(l))
-	}
-	if m.Status != nil {
-		n += 1 + sovCircuit(uint64(*m.Status))
-	}
-	if m.XXX_unrecognized != nil {
-		n += len(m.XXX_unrecognized)
-	}
-	return n
-}
-
-func (m *StopMessage) Size() (n int) {
-	if m == nil {
-		return 0
-	}
-	var l int
-	_ = l
-	if m.Type != nil {
-		n += 1 + sovCircuit(uint64(*m.Type))
-	}
-	if m.Peer != nil {
-		l = m.Peer.Size()
-		n += 1 + l + sovCircuit(uint64(l))
-	}
-	if m.Limit != nil {
-		l = m.Limit.Size()
-		n += 1 + l + sovCircuit(uint64(l))
-	}
-	if m.Status != nil {
-		n += 1 + sovCircuit(uint64(*m.Status))
-	}
-	if m.XXX_unrecognized != nil {
-		n += len(m.XXX_unrecognized)
-	}
-	return n
-}
-
-func (m *Peer) Size() (n int) {
-	if m == nil {
-		return 0
-	}
-	var l int
-	_ = l
-	if m.Id != nil {
-		l = len(m.Id)
-		n += 1 + l + sovCircuit(uint64(l))
-	}
-	if len(m.Addrs) > 0 {
-		for _, b := range m.Addrs {
-			l = len(b)
-			n += 1 + l + sovCircuit(uint64(l))
-		}
-	}
-	if m.XXX_unrecognized != nil {
-		n += len(m.XXX_unrecognized)
-	}
-	return n
-}
-
-func (m *Reservation) Size() (n int) {
-	if m == nil {
-		return 0
-	}
-	var l int
-	_ = l
-	if m.Expire != nil {
-		n += 1 + sovCircuit(uint64(*m.Expire))
-	}
-	if len(m.Addrs) > 0 {
-		for _, b := range m.Addrs {
-			l = len(b)
-			n += 1 + l + sovCircuit(uint64(l))
-		}
-	}
-	if m.Voucher != nil {
-		l = len(m.Voucher)
-		n += 1 + l + sovCircuit(uint64(l))
-	}
-	if m.XXX_unrecognized != nil {
-		n += len(m.XXX_unrecognized)
-	}
-	return n
-}
-
-func (m *Limit) Size() (n int) {
-	if m == nil {
-		return 0
-	}
-	var l int
-	_ = l
-	if m.Duration != nil {
-		n += 1 + sovCircuit(uint64(*m.Duration))
-	}
-	if m.Data != nil {
-		n += 1 + sovCircuit(uint64(*m.Data))
-	}
-	if m.XXX_unrecognized != nil {
-		n += len(m.XXX_unrecognized)
-	}
-	return n
-}
-
-func sovCircuit(x uint64) (n int) {
-	return (math_bits.Len64(x|1) + 6) / 7
-}
-func sozCircuit(x uint64) (n int) {
-	return sovCircuit(uint64((x << 1) ^ uint64((int64(x) >> 63))))
-}
-func (m *HopMessage) Unmarshal(dAtA []byte) error {
-	var hasFields [1]uint64
-	l := len(dAtA)
-	iNdEx := 0
-	for iNdEx < l {
-		preIndex := iNdEx
-		var wire uint64
-		for shift := uint(0); ; shift += 7 {
-			if shift >= 64 {
-				return ErrIntOverflowCircuit
-			}
-			if iNdEx >= l {
-				return io.ErrUnexpectedEOF
-			}
-			b := dAtA[iNdEx]
-			iNdEx++
-			wire |= uint64(b&0x7F) << shift
-			if b < 0x80 {
-				break
-			}
-		}
-		fieldNum := int32(wire >> 3)
-		wireType := int(wire & 0x7)
-		if wireType == 4 {
-			return fmt.Errorf("proto: HopMessage: wiretype end group for non-group")
-		}
-		if fieldNum <= 0 {
-			return fmt.Errorf("proto: HopMessage: illegal tag %d (wire type %d)", fieldNum, wire)
-		}
-		switch fieldNum {
-		case 1:
-			if wireType != 0 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Type", wireType)
-			}
-			var v HopMessage_Type
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				v |= HopMessage_Type(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			m.Type = &v
-			hasFields[0] |= uint64(0x00000001)
-		case 2:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Peer", wireType)
-			}
-			var msglen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				msglen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if msglen < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			postIndex := iNdEx + msglen
-			if postIndex < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			if m.Peer == nil {
-				m.Peer = &Peer{}
-			}
-			if err := m.Peer.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
-			}
-			iNdEx = postIndex
-		case 3:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Reservation", wireType)
-			}
-			var msglen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				msglen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if msglen < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			postIndex := iNdEx + msglen
-			if postIndex < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			if m.Reservation == nil {
-				m.Reservation = &Reservation{}
-			}
-			if err := m.Reservation.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
-			}
-			iNdEx = postIndex
-		case 4:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Limit", wireType)
-			}
-			var msglen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				msglen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if msglen < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			postIndex := iNdEx + msglen
-			if postIndex < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			if m.Limit == nil {
-				m.Limit = &Limit{}
-			}
-			if err := m.Limit.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
-			}
-			iNdEx = postIndex
-		case 5:
-			if wireType != 0 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Status", wireType)
-			}
-			var v Status
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				v |= Status(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			m.Status = &v
-		default:
-			iNdEx = preIndex
-			skippy, err := skipCircuit(dAtA[iNdEx:])
-			if err != nil {
-				return err
-			}
-			if skippy < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
-			iNdEx += skippy
-		}
-	}
-	if hasFields[0]&uint64(0x00000001) == 0 {
-		return github_com_gogo_protobuf_proto.NewRequiredNotSetError("type")
-	}
-
-	if iNdEx > l {
-		return io.ErrUnexpectedEOF
-	}
-	return nil
-}
-func (m *StopMessage) Unmarshal(dAtA []byte) error {
-	var hasFields [1]uint64
-	l := len(dAtA)
-	iNdEx := 0
-	for iNdEx < l {
-		preIndex := iNdEx
-		var wire uint64
-		for shift := uint(0); ; shift += 7 {
-			if shift >= 64 {
-				return ErrIntOverflowCircuit
-			}
-			if iNdEx >= l {
-				return io.ErrUnexpectedEOF
-			}
-			b := dAtA[iNdEx]
-			iNdEx++
-			wire |= uint64(b&0x7F) << shift
-			if b < 0x80 {
-				break
-			}
-		}
-		fieldNum := int32(wire >> 3)
-		wireType := int(wire & 0x7)
-		if wireType == 4 {
-			return fmt.Errorf("proto: StopMessage: wiretype end group for non-group")
-		}
-		if fieldNum <= 0 {
-			return fmt.Errorf("proto: StopMessage: illegal tag %d (wire type %d)", fieldNum, wire)
-		}
-		switch fieldNum {
-		case 1:
-			if wireType != 0 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Type", wireType)
-			}
-			var v StopMessage_Type
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				v |= StopMessage_Type(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			m.Type = &v
-			hasFields[0] |= uint64(0x00000001)
-		case 2:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Peer", wireType)
-			}
-			var msglen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				msglen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if msglen < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			postIndex := iNdEx + msglen
-			if postIndex < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			if m.Peer == nil {
-				m.Peer = &Peer{}
-			}
-			if err := m.Peer.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
-			}
-			iNdEx = postIndex
-		case 3:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Limit", wireType)
-			}
-			var msglen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				msglen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if msglen < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			postIndex := iNdEx + msglen
-			if postIndex < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			if m.Limit == nil {
-				m.Limit = &Limit{}
-			}
-			if err := m.Limit.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
-			}
-			iNdEx = postIndex
-		case 4:
-			if wireType != 0 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Status", wireType)
-			}
-			var v Status
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				v |= Status(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			m.Status = &v
-		default:
-			iNdEx = preIndex
-			skippy, err := skipCircuit(dAtA[iNdEx:])
-			if err != nil {
-				return err
-			}
-			if skippy < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
-			iNdEx += skippy
-		}
-	}
-	if hasFields[0]&uint64(0x00000001) == 0 {
-		return github_com_gogo_protobuf_proto.NewRequiredNotSetError("type")
-	}
-
-	if iNdEx > l {
-		return io.ErrUnexpectedEOF
-	}
-	return nil
-}
-func (m *Peer) Unmarshal(dAtA []byte) error {
-	var hasFields [1]uint64
-	l := len(dAtA)
-	iNdEx := 0
-	for iNdEx < l {
-		preIndex := iNdEx
-		var wire uint64
-		for shift := uint(0); ; shift += 7 {
-			if shift >= 64 {
-				return ErrIntOverflowCircuit
-			}
-			if iNdEx >= l {
-				return io.ErrUnexpectedEOF
-			}
-			b := dAtA[iNdEx]
-			iNdEx++
-			wire |= uint64(b&0x7F) << shift
-			if b < 0x80 {
-				break
-			}
-		}
-		fieldNum := int32(wire >> 3)
-		wireType := int(wire & 0x7)
-		if wireType == 4 {
-			return fmt.Errorf("proto: Peer: wiretype end group for non-group")
-		}
-		if fieldNum <= 0 {
-			return fmt.Errorf("proto: Peer: illegal tag %d (wire type %d)", fieldNum, wire)
-		}
-		switch fieldNum {
-		case 1:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Id", wireType)
-			}
-			var byteLen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				byteLen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if byteLen < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			postIndex := iNdEx + byteLen
-			if postIndex < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.Id = append(m.Id[:0], dAtA[iNdEx:postIndex]...)
-			if m.Id == nil {
-				m.Id = []byte{}
-			}
-			iNdEx = postIndex
-			hasFields[0] |= uint64(0x00000001)
-		case 2:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Addrs", wireType)
-			}
-			var byteLen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				byteLen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if byteLen < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			postIndex := iNdEx + byteLen
-			if postIndex < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.Addrs = append(m.Addrs, make([]byte, postIndex-iNdEx))
-			copy(m.Addrs[len(m.Addrs)-1], dAtA[iNdEx:postIndex])
-			iNdEx = postIndex
-		default:
-			iNdEx = preIndex
-			skippy, err := skipCircuit(dAtA[iNdEx:])
-			if err != nil {
-				return err
-			}
-			if skippy < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
-			iNdEx += skippy
-		}
-	}
-	if hasFields[0]&uint64(0x00000001) == 0 {
-		return github_com_gogo_protobuf_proto.NewRequiredNotSetError("id")
-	}
-
-	if iNdEx > l {
-		return io.ErrUnexpectedEOF
-	}
-	return nil
-}
-func (m *Reservation) Unmarshal(dAtA []byte) error {
-	l := len(dAtA)
-	iNdEx := 0
-	for iNdEx < l {
-		preIndex := iNdEx
-		var wire uint64
-		for shift := uint(0); ; shift += 7 {
-			if shift >= 64 {
-				return ErrIntOverflowCircuit
-			}
-			if iNdEx >= l {
-				return io.ErrUnexpectedEOF
-			}
-			b := dAtA[iNdEx]
-			iNdEx++
-			wire |= uint64(b&0x7F) << shift
-			if b < 0x80 {
-				break
-			}
-		}
-		fieldNum := int32(wire >> 3)
-		wireType := int(wire & 0x7)
-		if wireType == 4 {
-			return fmt.Errorf("proto: Reservation: wiretype end group for non-group")
-		}
-		if fieldNum <= 0 {
-			return fmt.Errorf("proto: Reservation: illegal tag %d (wire type %d)", fieldNum, wire)
-		}
-		switch fieldNum {
-		case 1:
-			if wireType != 0 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Expire", wireType)
-			}
-			var v uint64
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				v |= uint64(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			m.Expire = &v
-		case 2:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Addrs", wireType)
-			}
-			var byteLen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				byteLen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if byteLen < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			postIndex := iNdEx + byteLen
-			if postIndex < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.Addrs = append(m.Addrs, make([]byte, postIndex-iNdEx))
-			copy(m.Addrs[len(m.Addrs)-1], dAtA[iNdEx:postIndex])
-			iNdEx = postIndex
-		case 3:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Voucher", wireType)
-			}
-			var byteLen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				byteLen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if byteLen < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			postIndex := iNdEx + byteLen
-			if postIndex < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.Voucher = append(m.Voucher[:0], dAtA[iNdEx:postIndex]...)
-			if m.Voucher == nil {
-				m.Voucher = []byte{}
-			}
-			iNdEx = postIndex
-		default:
-			iNdEx = preIndex
-			skippy, err := skipCircuit(dAtA[iNdEx:])
-			if err != nil {
-				return err
-			}
-			if skippy < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
-			iNdEx += skippy
-		}
-	}
-
-	if iNdEx > l {
-		return io.ErrUnexpectedEOF
-	}
-	return nil
-}
-func (m *Limit) Unmarshal(dAtA []byte) error {
-	l := len(dAtA)
-	iNdEx := 0
-	for iNdEx < l {
-		preIndex := iNdEx
-		var wire uint64
-		for shift := uint(0); ; shift += 7 {
-			if shift >= 64 {
-				return ErrIntOverflowCircuit
-			}
-			if iNdEx >= l {
-				return io.ErrUnexpectedEOF
-			}
-			b := dAtA[iNdEx]
-			iNdEx++
-			wire |= uint64(b&0x7F) << shift
-			if b < 0x80 {
-				break
-			}
-		}
-		fieldNum := int32(wire >> 3)
-		wireType := int(wire & 0x7)
-		if wireType == 4 {
-			return fmt.Errorf("proto: Limit: wiretype end group for non-group")
-		}
-		if fieldNum <= 0 {
-			return fmt.Errorf("proto: Limit: illegal tag %d (wire type %d)", fieldNum, wire)
-		}
-		switch fieldNum {
-		case 1:
-			if wireType != 0 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Duration", wireType)
-			}
-			var v uint32
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				v |= uint32(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			m.Duration = &v
-		case 2:
-			if wireType != 0 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Data", wireType)
-			}
-			var v uint64
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				v |= uint64(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			m.Data = &v
-		default:
-			iNdEx = preIndex
-			skippy, err := skipCircuit(dAtA[iNdEx:])
-			if err != nil {
-				return err
-			}
-			if skippy < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) < 0 {
-				return ErrInvalidLengthCircuit
-			}
-			if (iNdEx + skippy) > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
-			iNdEx += skippy
-		}
-	}
-
-	if iNdEx > l {
-		return io.ErrUnexpectedEOF
-	}
-	return nil
-}
-func skipCircuit(dAtA []byte) (n int, err error) {
-	l := len(dAtA)
-	iNdEx := 0
-	depth := 0
-	for iNdEx < l {
-		var wire uint64
-		for shift := uint(0); ; shift += 7 {
-			if shift >= 64 {
-				return 0, ErrIntOverflowCircuit
-			}
-			if iNdEx >= l {
-				return 0, io.ErrUnexpectedEOF
-			}
-			b := dAtA[iNdEx]
-			iNdEx++
-			wire |= (uint64(b) & 0x7F) << shift
-			if b < 0x80 {
-				break
-			}
-		}
-		wireType := int(wire & 0x7)
-		switch wireType {
-		case 0:
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return 0, ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return 0, io.ErrUnexpectedEOF
-				}
-				iNdEx++
-				if dAtA[iNdEx-1] < 0x80 {
-					break
-				}
-			}
-		case 1:
-			iNdEx += 8
-		case 2:
-			var length int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return 0, ErrIntOverflowCircuit
-				}
-				if iNdEx >= l {
-					return 0, io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				length |= (int(b) & 0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if length < 0 {
-				return 0, ErrInvalidLengthCircuit
-			}
-			iNdEx += length
-		case 3:
-			depth++
-		case 4:
-			if depth == 0 {
-				return 0, ErrUnexpectedEndOfGroupCircuit
-			}
-			depth--
-		case 5:
-			iNdEx += 4
-		default:
-			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
-		}
-		if iNdEx < 0 {
-			return 0, ErrInvalidLengthCircuit
-		}
-		if depth == 0 {
-			return iNdEx, nil
-		}
-	}
-	return 0, io.ErrUnexpectedEOF
-}
-
-var (
-	ErrInvalidLengthCircuit        = fmt.Errorf("proto: negative length found during unmarshaling")
-	ErrIntOverflowCircuit          = fmt.Errorf("proto: integer overflow")
-	ErrUnexpectedEndOfGroupCircuit = fmt.Errorf("proto: unexpected end of group")
-)
diff --git a/p2p/host/circuitv2/pb/circuit.proto b/p2p/host/circuitv2/pb/circuit.proto
deleted file mode 100644
index b73555cb..00000000
--- a/p2p/host/circuitv2/pb/circuit.proto
+++ /dev/null
@@ -1,60 +0,0 @@
-syntax = "proto2";
-
-package circuit.pb;
-
-message HopMessage {
-  enum Type {
-    RESERVE = 0;
-    CONNECT = 1;
-    STATUS = 2;
-  }
-
-  required Type type = 1;
-
-  optional Peer peer = 2;
-  optional Reservation reservation = 3;
-  optional Limit limit = 4;
-
-  optional Status status = 5;
-}
-
-message StopMessage {
-  enum Type {
-    CONNECT = 0;
-    STATUS = 1;
-  }
-
-  required Type type = 1;
-
-  optional Peer peer = 2;
-  optional Limit limit = 3;
-
-  optional Status status = 4;
-}
-
-message Peer {
-  required bytes id = 1;
-  repeated bytes addrs = 2;
-}
-
-message Reservation {
-  optional uint64 expire = 1; // Unix expiration time (UTC)
-  repeated bytes addrs = 2;   // relay addrs for reserving peer
-  optional bytes voucher = 3; // reservation voucher
-}
-
-message Limit {
-  optional uint32 duration = 1; // seconds
-  optional uint64 data = 2;     // bytes
-}
-
-enum Status {
-  OK                      = 100;
-  RESERVATION_REFUSED     = 200;
-  RESOURCE_LIMIT_EXCEEDED = 201;
-  PERMISSION_DENIED       = 202;
-  CONNECTION_FAILED       = 203;
-  NO_RESERVATION          = 204;
-  MALFORMED_MESSAGE       = 400;
-  UNEXPECTED_MESSAGE      = 401;
-}
diff --git a/p2p/host/circuitv2/pb/voucher.pb.go b/p2p/host/circuitv2/pb/voucher.pb.go
deleted file mode 100644
index 6fed0082..00000000
--- a/p2p/host/circuitv2/pb/voucher.pb.go
+++ /dev/null
@@ -1,438 +0,0 @@
-// Code generated by protoc-gen-gogo. DO NOT EDIT.
-// source: voucher.proto
-
-package circuit_pb
-
-import (
-	fmt "fmt"
-	github_com_gogo_protobuf_proto "github.com/gogo/protobuf/proto"
-	proto "github.com/gogo/protobuf/proto"
-	io "io"
-	math "math"
-	math_bits "math/bits"
-)
-
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
-
-type ReservationVoucher struct {
-	Relay                []byte   `protobuf:"bytes,1,req,name=relay" json:"relay,omitempty"`
-	Peer                 []byte   `protobuf:"bytes,2,req,name=peer" json:"peer,omitempty"`
-	Expiration           *uint64  `protobuf:"varint,3,req,name=expiration" json:"expiration,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
-}
-
-func (m *ReservationVoucher) Reset()         { *m = ReservationVoucher{} }
-func (m *ReservationVoucher) String() string { return proto.CompactTextString(m) }
-func (*ReservationVoucher) ProtoMessage()    {}
-func (*ReservationVoucher) Descriptor() ([]byte, []int) {
-	return fileDescriptor_a22a9b0d3335ba25, []int{0}
-}
-func (m *ReservationVoucher) XXX_Unmarshal(b []byte) error {
-	return m.Unmarshal(b)
-}
-func (m *ReservationVoucher) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	if deterministic {
-		return xxx_messageInfo_ReservationVoucher.Marshal(b, m, deterministic)
-	} else {
-		b = b[:cap(b)]
-		n, err := m.MarshalToSizedBuffer(b)
-		if err != nil {
-			return nil, err
-		}
-		return b[:n], nil
-	}
-}
-func (m *ReservationVoucher) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_ReservationVoucher.Merge(m, src)
-}
-func (m *ReservationVoucher) XXX_Size() int {
-	return m.Size()
-}
-func (m *ReservationVoucher) XXX_DiscardUnknown() {
-	xxx_messageInfo_ReservationVoucher.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_ReservationVoucher proto.InternalMessageInfo
-
-func (m *ReservationVoucher) GetRelay() []byte {
-	if m != nil {
-		return m.Relay
-	}
-	return nil
-}
-
-func (m *ReservationVoucher) GetPeer() []byte {
-	if m != nil {
-		return m.Peer
-	}
-	return nil
-}
-
-func (m *ReservationVoucher) GetExpiration() uint64 {
-	if m != nil && m.Expiration != nil {
-		return *m.Expiration
-	}
-	return 0
-}
-
-func init() {
-	proto.RegisterType((*ReservationVoucher)(nil), "circuit.pb.ReservationVoucher")
-}
-
-func init() { proto.RegisterFile("voucher.proto", fileDescriptor_a22a9b0d3335ba25) }
-
-var fileDescriptor_a22a9b0d3335ba25 = []byte{
-	// 135 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x2d, 0xcb, 0x2f, 0x4d,
-	0xce, 0x48, 0x2d, 0xd2, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x4a, 0xce, 0x2c, 0x4a, 0x2e,
-	0xcd, 0x2c, 0xd1, 0x2b, 0x48, 0x52, 0x8a, 0xe3, 0x12, 0x0a, 0x4a, 0x2d, 0x4e, 0x2d, 0x2a, 0x4b,
-	0x2c, 0xc9, 0xcc, 0xcf, 0x0b, 0x83, 0xa8, 0x13, 0x12, 0xe1, 0x62, 0x2d, 0x4a, 0xcd, 0x49, 0xac,
-	0x94, 0x60, 0x54, 0x60, 0xd2, 0xe0, 0x09, 0x82, 0x70, 0x84, 0x84, 0xb8, 0x58, 0x0a, 0x52, 0x53,
-	0x8b, 0x24, 0x98, 0xc0, 0x82, 0x60, 0xb6, 0x90, 0x1c, 0x17, 0x57, 0x6a, 0x45, 0x41, 0x66, 0x11,
-	0x58, 0xbb, 0x04, 0xb3, 0x02, 0x93, 0x06, 0x4b, 0x10, 0x92, 0x88, 0x13, 0xcf, 0x89, 0x47, 0x72,
-	0x8c, 0x17, 0x1e, 0xc9, 0x31, 0x3e, 0x78, 0x24, 0xc7, 0x08, 0x08, 0x00, 0x00, 0xff, 0xff, 0xc0,
-	0x81, 0x3a, 0xee, 0x89, 0x00, 0x00, 0x00,
-}
-
-func (m *ReservationVoucher) Marshal() (dAtA []byte, err error) {
-	size := m.Size()
-	dAtA = make([]byte, size)
-	n, err := m.MarshalToSizedBuffer(dAtA[:size])
-	if err != nil {
-		return nil, err
-	}
-	return dAtA[:n], nil
-}
-
-func (m *ReservationVoucher) MarshalTo(dAtA []byte) (int, error) {
-	size := m.Size()
-	return m.MarshalToSizedBuffer(dAtA[:size])
-}
-
-func (m *ReservationVoucher) MarshalToSizedBuffer(dAtA []byte) (int, error) {
-	i := len(dAtA)
-	_ = i
-	var l int
-	_ = l
-	if m.XXX_unrecognized != nil {
-		i -= len(m.XXX_unrecognized)
-		copy(dAtA[i:], m.XXX_unrecognized)
-	}
-	if m.Expiration == nil {
-		return 0, github_com_gogo_protobuf_proto.NewRequiredNotSetError("expiration")
-	} else {
-		i = encodeVarintVoucher(dAtA, i, uint64(*m.Expiration))
-		i--
-		dAtA[i] = 0x18
-	}
-	if m.Peer == nil {
-		return 0, github_com_gogo_protobuf_proto.NewRequiredNotSetError("peer")
-	} else {
-		i -= len(m.Peer)
-		copy(dAtA[i:], m.Peer)
-		i = encodeVarintVoucher(dAtA, i, uint64(len(m.Peer)))
-		i--
-		dAtA[i] = 0x12
-	}
-	if m.Relay == nil {
-		return 0, github_com_gogo_protobuf_proto.NewRequiredNotSetError("relay")
-	} else {
-		i -= len(m.Relay)
-		copy(dAtA[i:], m.Relay)
-		i = encodeVarintVoucher(dAtA, i, uint64(len(m.Relay)))
-		i--
-		dAtA[i] = 0xa
-	}
-	return len(dAtA) - i, nil
-}
-
-func encodeVarintVoucher(dAtA []byte, offset int, v uint64) int {
-	offset -= sovVoucher(v)
-	base := offset
-	for v >= 1<<7 {
-		dAtA[offset] = uint8(v&0x7f | 0x80)
-		v >>= 7
-		offset++
-	}
-	dAtA[offset] = uint8(v)
-	return base
-}
-func (m *ReservationVoucher) Size() (n int) {
-	if m == nil {
-		return 0
-	}
-	var l int
-	_ = l
-	if m.Relay != nil {
-		l = len(m.Relay)
-		n += 1 + l + sovVoucher(uint64(l))
-	}
-	if m.Peer != nil {
-		l = len(m.Peer)
-		n += 1 + l + sovVoucher(uint64(l))
-	}
-	if m.Expiration != nil {
-		n += 1 + sovVoucher(uint64(*m.Expiration))
-	}
-	if m.XXX_unrecognized != nil {
-		n += len(m.XXX_unrecognized)
-	}
-	return n
-}
-
-func sovVoucher(x uint64) (n int) {
-	return (math_bits.Len64(x|1) + 6) / 7
-}
-func sozVoucher(x uint64) (n int) {
-	return sovVoucher(uint64((x << 1) ^ uint64((int64(x) >> 63))))
-}
-func (m *ReservationVoucher) Unmarshal(dAtA []byte) error {
-	var hasFields [1]uint64
-	l := len(dAtA)
-	iNdEx := 0
-	for iNdEx < l {
-		preIndex := iNdEx
-		var wire uint64
-		for shift := uint(0); ; shift += 7 {
-			if shift >= 64 {
-				return ErrIntOverflowVoucher
-			}
-			if iNdEx >= l {
-				return io.ErrUnexpectedEOF
-			}
-			b := dAtA[iNdEx]
-			iNdEx++
-			wire |= uint64(b&0x7F) << shift
-			if b < 0x80 {
-				break
-			}
-		}
-		fieldNum := int32(wire >> 3)
-		wireType := int(wire & 0x7)
-		if wireType == 4 {
-			return fmt.Errorf("proto: ReservationVoucher: wiretype end group for non-group")
-		}
-		if fieldNum <= 0 {
-			return fmt.Errorf("proto: ReservationVoucher: illegal tag %d (wire type %d)", fieldNum, wire)
-		}
-		switch fieldNum {
-		case 1:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Relay", wireType)
-			}
-			var byteLen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowVoucher
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				byteLen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if byteLen < 0 {
-				return ErrInvalidLengthVoucher
-			}
-			postIndex := iNdEx + byteLen
-			if postIndex < 0 {
-				return ErrInvalidLengthVoucher
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.Relay = append(m.Relay[:0], dAtA[iNdEx:postIndex]...)
-			if m.Relay == nil {
-				m.Relay = []byte{}
-			}
-			iNdEx = postIndex
-			hasFields[0] |= uint64(0x00000001)
-		case 2:
-			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Peer", wireType)
-			}
-			var byteLen int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowVoucher
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				byteLen |= int(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if byteLen < 0 {
-				return ErrInvalidLengthVoucher
-			}
-			postIndex := iNdEx + byteLen
-			if postIndex < 0 {
-				return ErrInvalidLengthVoucher
-			}
-			if postIndex > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.Peer = append(m.Peer[:0], dAtA[iNdEx:postIndex]...)
-			if m.Peer == nil {
-				m.Peer = []byte{}
-			}
-			iNdEx = postIndex
-			hasFields[0] |= uint64(0x00000002)
-		case 3:
-			if wireType != 0 {
-				return fmt.Errorf("proto: wrong wireType = %d for field Expiration", wireType)
-			}
-			var v uint64
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return ErrIntOverflowVoucher
-				}
-				if iNdEx >= l {
-					return io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				v |= uint64(b&0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			m.Expiration = &v
-			hasFields[0] |= uint64(0x00000004)
-		default:
-			iNdEx = preIndex
-			skippy, err := skipVoucher(dAtA[iNdEx:])
-			if err != nil {
-				return err
-			}
-			if skippy < 0 {
-				return ErrInvalidLengthVoucher
-			}
-			if (iNdEx + skippy) < 0 {
-				return ErrInvalidLengthVoucher
-			}
-			if (iNdEx + skippy) > l {
-				return io.ErrUnexpectedEOF
-			}
-			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
-			iNdEx += skippy
-		}
-	}
-	if hasFields[0]&uint64(0x00000001) == 0 {
-		return github_com_gogo_protobuf_proto.NewRequiredNotSetError("relay")
-	}
-	if hasFields[0]&uint64(0x00000002) == 0 {
-		return github_com_gogo_protobuf_proto.NewRequiredNotSetError("peer")
-	}
-	if hasFields[0]&uint64(0x00000004) == 0 {
-		return github_com_gogo_protobuf_proto.NewRequiredNotSetError("expiration")
-	}
-
-	if iNdEx > l {
-		return io.ErrUnexpectedEOF
-	}
-	return nil
-}
-func skipVoucher(dAtA []byte) (n int, err error) {
-	l := len(dAtA)
-	iNdEx := 0
-	depth := 0
-	for iNdEx < l {
-		var wire uint64
-		for shift := uint(0); ; shift += 7 {
-			if shift >= 64 {
-				return 0, ErrIntOverflowVoucher
-			}
-			if iNdEx >= l {
-				return 0, io.ErrUnexpectedEOF
-			}
-			b := dAtA[iNdEx]
-			iNdEx++
-			wire |= (uint64(b) & 0x7F) << shift
-			if b < 0x80 {
-				break
-			}
-		}
-		wireType := int(wire & 0x7)
-		switch wireType {
-		case 0:
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return 0, ErrIntOverflowVoucher
-				}
-				if iNdEx >= l {
-					return 0, io.ErrUnexpectedEOF
-				}
-				iNdEx++
-				if dAtA[iNdEx-1] < 0x80 {
-					break
-				}
-			}
-		case 1:
-			iNdEx += 8
-		case 2:
-			var length int
-			for shift := uint(0); ; shift += 7 {
-				if shift >= 64 {
-					return 0, ErrIntOverflowVoucher
-				}
-				if iNdEx >= l {
-					return 0, io.ErrUnexpectedEOF
-				}
-				b := dAtA[iNdEx]
-				iNdEx++
-				length |= (int(b) & 0x7F) << shift
-				if b < 0x80 {
-					break
-				}
-			}
-			if length < 0 {
-				return 0, ErrInvalidLengthVoucher
-			}
-			iNdEx += length
-		case 3:
-			depth++
-		case 4:
-			if depth == 0 {
-				return 0, ErrUnexpectedEndOfGroupVoucher
-			}
-			depth--
-		case 5:
-			iNdEx += 4
-		default:
-			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
-		}
-		if iNdEx < 0 {
-			return 0, ErrInvalidLengthVoucher
-		}
-		if depth == 0 {
-			return iNdEx, nil
-		}
-	}
-	return 0, io.ErrUnexpectedEOF
-}
-
-var (
-	ErrInvalidLengthVoucher        = fmt.Errorf("proto: negative length found during unmarshaling")
-	ErrIntOverflowVoucher          = fmt.Errorf("proto: integer overflow")
-	ErrUnexpectedEndOfGroupVoucher = fmt.Errorf("proto: unexpected end of group")
-)
diff --git a/p2p/host/circuitv2/pb/voucher.proto b/p2p/host/circuitv2/pb/voucher.proto
deleted file mode 100644
index 08644025..00000000
--- a/p2p/host/circuitv2/pb/voucher.proto
+++ /dev/null
@@ -1,9 +0,0 @@
-syntax = "proto2";
-
-package circuit.pb;
-
-message ReservationVoucher {
-  required bytes relay = 1;
-  required bytes peer = 2;
-  required uint64 expiration = 3;
-}
diff --git a/p2p/host/circuitv2/proto/protocol.go b/p2p/host/circuitv2/proto/protocol.go
deleted file mode 100644
index d27fc509..00000000
--- a/p2p/host/circuitv2/proto/protocol.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package proto
-
-const (
-	ProtoIDv1     = "/libp2p/circuit/relay/0.1.0"
-	ProtoIDv2Hop  = "/libp2p/circuit/relay/0.2.0/hop"
-	ProtoIDv2Stop = "/libp2p/circuit/relay/0.2.0/stop"
-)
diff --git a/p2p/host/circuitv2/proto/voucher.go b/p2p/host/circuitv2/proto/voucher.go
deleted file mode 100644
index 6b4c24c8..00000000
--- a/p2p/host/circuitv2/proto/voucher.go
+++ /dev/null
@@ -1,72 +0,0 @@
-package proto
-
-import (
-	"time"
-
-	pbv2 "github.com/libp2p/go-libp2p/p2p/host/circuitv2/pb"
-
-	"github.com/libp2p/go-libp2p-core/peer"
-	"github.com/libp2p/go-libp2p-core/record"
-)
-
-const RecordDomain = "libp2p-relay-rsvp"
-
-// TODO: register in multicodec table in https://github.com/multiformats/multicodec
-var RecordCodec = []byte{0x03, 0x02}
-
-func init() {
-	record.RegisterType(&ReservationVoucher{})
-}
-
-type ReservationVoucher struct {
-	// Relay is the ID of the peer providing relay service
-	Relay peer.ID
-	// Peer is the ID of the peer receiving relay service through Relay
-	Peer peer.ID
-	// Expiration is the expiration time of the reservation
-	Expiration time.Time
-}
-
-var _ record.Record = (*ReservationVoucher)(nil)
-
-func (rv *ReservationVoucher) Domain() string {
-	return RecordDomain
-}
-
-func (rv *ReservationVoucher) Codec() []byte {
-	return RecordCodec
-}
-
-func (rv *ReservationVoucher) MarshalRecord() ([]byte, error) {
-	relay := []byte(rv.Relay)
-	peer := []byte(rv.Peer)
-	expiration := uint64(rv.Expiration.Unix())
-	pbrv := &pbv2.ReservationVoucher{
-		Relay:      relay,
-		Peer:       peer,
-		Expiration: &expiration,
-	}
-
-	return pbrv.Marshal()
-}
-
-func (rv *ReservationVoucher) UnmarshalRecord(blob []byte) error {
-	pbrv := pbv2.ReservationVoucher{}
-	err := pbrv.Unmarshal(blob)
-	if err != nil {
-		return err
-	}
-
-	rv.Relay, err = peer.IDFromBytes(pbrv.GetRelay())
-	if err != nil {
-		return err
-	}
-
-	rv.Peer, err = peer.IDFromBytes(pbrv.GetPeer())
-	if err != nil {
-		return err
-	}
-
-	rv.Expiration = time.Unix(int64(pbrv.GetExpiration()), 0)
-	return nil
-}
diff --git a/p2p/host/circuitv2/relay/acl.go b/p2p/host/circuitv2/relay/acl.go
deleted file mode 100644
index 05010513..00000000
--- a/p2p/host/circuitv2/relay/acl.go
+++ /dev/null
@@ -1,17 +0,0 @@
-package relay
-
-import (
-	"github.com/libp2p/go-libp2p-core/peer"
-
-	ma "github.com/multiformats/go-multiaddr"
-)
-
-// ACLFilter is an Access Control mechanism for relayed connect.
-type ACLFilter interface {
-	// AllowReserve returns true if a reservation from a peer with the given peer ID and multiaddr
-	// is allowed.
-	AllowReserve(p peer.ID, a ma.Multiaddr) bool
-	// AllowConnect returns true if a source peer, with a given multiaddr is allowed to connect
-	// to a destination peer.
-	AllowConnect(src peer.ID, srcAddr ma.Multiaddr, dest peer.ID) bool
-}
diff --git a/p2p/host/circuitv2/relay/constraints.go b/p2p/host/circuitv2/relay/constraints.go
deleted file mode 100644
index 1b0087ec..00000000
--- a/p2p/host/circuitv2/relay/constraints.go
+++ /dev/null
@@ -1,124 +0,0 @@
-package relay
-
-import (
-	"errors"
-	"sync"
-	"time"
-
-	asnutil "github.com/libp2p/go-libp2p-asn-util"
-	"github.com/libp2p/go-libp2p-core/peer"
-	ma "github.com/multiformats/go-multiaddr"
-	manet "github.com/multiformats/go-multiaddr/net"
-)
-
-var validity = 30 * time.Minute
-
-var (
-	errTooManyReservations        = errors.New("too many reservations")
-	errTooManyReservationsForPeer = errors.New("too many reservations for peer")
-	errTooManyReservationsForIP   = errors.New("too many peers for IP address")
-	errTooManyReservationsForASN  = errors.New("too many peers for ASN")
-)
-
-// constraints implements various reservation constraints
-type constraints struct {
-	rc *Resources
-
-	mutex sync.Mutex
-	total []time.Time
-	peers map[peer.ID][]time.Time
-	ips   map[string][]time.Time
-	asns  map[string][]time.Time
-}
-
-// newConstraints creates a new constraints object.
-// The methods are *not* thread-safe; an external lock must be held if synchronization
-// is required.
-func newConstraints(rc *Resources) *constraints {
-	return &constraints{
-		rc:    rc,
-		peers: make(map[peer.ID][]time.Time),
-		ips:   make(map[string][]time.Time),
-		asns:  make(map[string][]time.Time),
-	}
-}
-
-// AddReservation adds a reservation for a given peer with a given multiaddr.
-// If adding this reservation violates IP constraints, an error is returned.
-func (c *constraints) AddReservation(p peer.ID, a ma.Multiaddr) error {
-	c.mutex.Lock()
-	defer c.mutex.Unlock()
-
-	now := time.Now()
-	c.cleanup(now)
-
-	if len(c.total) >= c.rc.MaxReservations {
-		return errTooManyReservations
-	}
-
-	ip, err := manet.ToIP(a)
-	if err != nil {
-		return errors.New("no IP address associated with peer")
-	}
-
-	peerReservations := c.peers[p]
-	if len(peerReservations) >= c.rc.MaxReservationsPerPeer {
-		return errTooManyReservationsForPeer
-	}
-
-	ipReservations := c.ips[ip.String()]
-	if len(ipReservations) >= c.rc.MaxReservationsPerIP {
-		return errTooManyReservationsForIP
-	}
-
-	var asnReservations []time.Time
-	var asn string
-	if ip.To4() == nil {
-		asn, _ = asnutil.Store.AsnForIPv6(ip)
-		if asn != "" {
-			asnReservations = c.asns[asn]
-			if len(asnReservations) >= c.rc.MaxReservationsPerASN {
-				return errTooManyReservationsForASN
-			}
-		}
-	}
-
-	expiry := now.Add(validity)
-	c.total = append(c.total, expiry)
-
-	peerReservations = append(peerReservations, expiry)
-	c.peers[p] = peerReservations
-
-	ipReservations = append(ipReservations, expiry)
-	c.ips[ip.String()] = ipReservations
-
-	if asn != "" {
-		asnReservations = append(asnReservations, expiry)
-		c.asns[asn] = asnReservations
-	}
-	return nil
-}
-
-func (c *constraints) cleanupList(l []time.Time, now time.Time) []time.Time {
-	var index int
-	for i, t := range l {
-		if t.After(now) {
-			break
-		}
-		index = i + 1
-	}
-	return l[index:]
-}
-
-func (c *constraints) cleanup(now time.Time) {
-	c.total = c.cleanupList(c.total, now)
-	for k, peerReservations := range c.peers {
-		c.peers[k] = c.cleanupList(peerReservations, now)
-	}
-	for k, ipReservations := range c.ips {
-		c.ips[k] = c.cleanupList(ipReservations, now)
-	}
-	for k, asnReservations := range c.asns {
-		c.asns[k] = c.cleanupList(asnReservations, now)
-	}
-}
diff --git a/p2p/host/circuitv2/relay/options.go b/p2p/host/circuitv2/relay/options.go
deleted file mode 100644
index 34641152..00000000
--- a/p2p/host/circuitv2/relay/options.go
+++ /dev/null
@@ -1,27 +0,0 @@
-package relay
-
-type Option func(*Relay) error
-
-// WithResources is a Relay option that sets specific relay resources for the relay.
-func WithResources(rc Resources) Option {
-	return func(r *Relay) error {
-		r.rc = rc
-		return nil
-	}
-}
-
-// WithLimit is a Relay option that sets only the relayed connection limits for the relay.
-func WithLimit(limit *RelayLimit) Option {
-	return func(r *Relay) error {
-		r.rc.Limit = limit
-		return nil
-	}
-}
-
-// WithACL is a Relay option that supplies an ACLFilter for access control.
-func WithACL(acl ACLFilter) Option {
-	return func(r *Relay) error {
-		r.acl = acl
-		return nil
-	}
-}
diff --git a/p2p/host/circuitv2/relay/relay.go b/p2p/host/circuitv2/relay/relay.go
deleted file mode 100644
index 8ddddd17..00000000
--- a/p2p/host/circuitv2/relay/relay.go
+++ /dev/null
@@ -1,510 +0,0 @@
-package relay
-
-import (
-	"context"
-	"fmt"
-	"io"
-	"sync"
-	"sync/atomic"
-	"time"
-
-	pbv2 "github.com/libp2p/go-libp2p/p2p/host/circuitv2/pb"
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/proto"
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/util"
-
-	"github.com/libp2p/go-libp2p-core/host"
-	"github.com/libp2p/go-libp2p-core/network"
-	"github.com/libp2p/go-libp2p-core/peer"
-	"github.com/libp2p/go-libp2p-core/record"
-
-	logging "github.com/ipfs/go-log"
-	pool "github.com/libp2p/go-buffer-pool"
-	ma "github.com/multiformats/go-multiaddr"
-	manet "github.com/multiformats/go-multiaddr/net"
-)
-
-const (
-	ReservationTagWeight = 10
-
-	StreamTimeout    = time.Minute
-	ConnectTimeout   = 30 * time.Second
-	HandshakeTimeout = time.Minute
-
-	maxMessageSize = 4096
-)
-
-var log = logging.Logger("relay")
-
-// Relay is the (limited) relay service object.
-type Relay struct {
-	closed uint32
-	ctx    context.Context
-	cancel func()
-
-	host        host.Host
-	rc          Resources
-	acl         ACLFilter
-	constraints *constraints
-
-	mx    sync.Mutex
-	rsvp  map[peer.ID]time.Time
-	conns map[peer.ID]int
-
-	selfAddr ma.Multiaddr
-}
-
-// New constructs a new limited relay that can provide relay services in the given host.
-func New(h host.Host, opts ...Option) (*Relay, error) {
-	ctx, cancel := context.WithCancel(context.Background())
-
-	r := &Relay{
-		ctx:    ctx,
-		cancel: cancel,
-		host:   h,
-		rc:     DefaultResources(),
-		acl:    nil,
-		rsvp:   make(map[peer.ID]time.Time),
-		conns:  make(map[peer.ID]int),
-	}
-
-	for _, opt := range opts {
-		err := opt(r)
-		if err != nil {
-			return nil, fmt.Errorf("error applying relay option: %w", err)
-		}
-	}
-
-	r.constraints = newConstraints(&r.rc)
-	r.selfAddr = ma.StringCast(fmt.Sprintf("/p2p/%s", h.ID()))
-
-	h.SetStreamHandler(proto.ProtoIDv2Hop, r.handleStream)
-	h.Network().Notify(
-		&network.NotifyBundle{
-			DisconnectedF: r.disconnected,
-		})
-	go r.background()
-
-	return r, nil
-}
-
-func (r *Relay) Close() error {
-	if atomic.CompareAndSwapUint32(&r.closed, 0, 1) {
-		r.host.RemoveStreamHandler(proto.ProtoIDv2Hop)
-		r.cancel()
-		r.mx.Lock()
-		for p := range r.rsvp {
-			r.host.ConnManager().UntagPeer(p, "relay-reservation")
-		}
-		r.mx.Unlock()
-	}
-	return nil
-}
-
-func (r *Relay) handleStream(s network.Stream) {
-	s.SetReadDeadline(time.Now().Add(StreamTimeout))
-
-	log.Infof("new relay stream from: %s", s.Conn().RemotePeer())
-
-	rd := util.NewDelimitedReader(s, maxMessageSize)
-	defer rd.Close()
-
-	var msg pbv2.HopMessage
-
-	err := rd.ReadMsg(&msg)
-	if err != nil {
-		r.handleError(s, pbv2.Status_MALFORMED_MESSAGE)
-		return
-	}
-	// reset stream deadline as message has been read
-	s.SetReadDeadline(time.Time{})
-
-	switch msg.GetType() {
-	case pbv2.HopMessage_RESERVE:
-		r.handleReserve(s)
-
-	case pbv2.HopMessage_CONNECT:
-		r.handleConnect(s, &msg)
-
-	default:
-		r.handleError(s, pbv2.Status_MALFORMED_MESSAGE)
-	}
-}
-
-func (r *Relay) handleReserve(s network.Stream) {
-	defer s.Close()
-
-	p := s.Conn().RemotePeer()
-	a := s.Conn().RemoteMultiaddr()
-
-	if util.IsRelayAddr(a) {
-		log.Debugf("refusing relay reservation for %s; reservation attempt over relay connection")
-		r.handleError(s, pbv2.Status_PERMISSION_DENIED)
-		return
-	}
-
-	if r.acl != nil && !r.acl.AllowReserve(p, a) {
-		log.Debugf("refusing relay reservation for %s; permission denied", p)
-		r.handleError(s, pbv2.Status_PERMISSION_DENIED)
-		return
-	}
-
-	r.mx.Lock()
-	now := time.Now()
-
-	_, exists := r.rsvp[p]
-	if !exists {
-		if err := r.constraints.AddReservation(p, a); err != nil {
-			r.mx.Unlock()
-			log.Debugf("refusing relay reservation for %s; IP constraint violation: %s", p, err)
-			r.handleError(s, pbv2.Status_RESERVATION_REFUSED)
-			return
-		}
-	}
-
-	expire := now.Add(r.rc.ReservationTTL)
-	r.rsvp[p] = expire
-	r.host.ConnManager().TagPeer(p, "relay-reservation", ReservationTagWeight)
-	r.mx.Unlock()
-
-	log.Debugf("reserving relay slot for %s", p)
-
-	// Delivery of the reservation might fail for a number of reasons.
-	// For example, the stream might be reset or the connection might be closed before the reservation is received.
-	// In that case, the reservation will just be garbage collected later.
-	if err := r.writeResponse(s, pbv2.Status_OK, r.makeReservationMsg(p, expire), r.makeLimitMsg(p)); err != nil {
-		log.Debugf("error writing reservation response; retracting reservation for %s", p)
-		s.Reset()
-	}
-}
-
-func (r *Relay) handleConnect(s network.Stream, msg *pbv2.HopMessage) {
-	src := s.Conn().RemotePeer()
-	a := s.Conn().RemoteMultiaddr()
-
-	if util.IsRelayAddr(a) {
-		log.Debugf("refusing connection from %s; connection attempt over relay connection")
-		r.handleError(s, pbv2.Status_PERMISSION_DENIED)
-		return
-	}
-
-	dest, err := util.PeerToPeerInfoV2(msg.GetPeer())
-	if err != nil {
-		r.handleError(s, pbv2.Status_MALFORMED_MESSAGE)
-		return
-	}
-
-	if r.acl != nil && !r.acl.AllowConnect(src, s.Conn().RemoteMultiaddr(), dest.ID) {
-		log.Debugf("refusing connection from %s to %s; permission denied", src, dest.ID)
-		r.handleError(s, pbv2.Status_PERMISSION_DENIED)
-		return
-	}
-
-	r.mx.Lock()
-	_, rsvp := r.rsvp[dest.ID]
-	if !rsvp {
-		r.mx.Unlock()
-		log.Debugf("refusing connection from %s to %s; no reservation", src, dest.ID)
-		r.handleError(s, pbv2.Status_NO_RESERVATION)
-		return
-	}
-
-	srcConns := r.conns[src]
-	if srcConns >= r.rc.MaxCircuits {
-		r.mx.Unlock()
-		log.Debugf("refusing connection from %s to %s; too many connections from %s", src, dest.ID, src)
-		r.handleError(s, pbv2.Status_RESOURCE_LIMIT_EXCEEDED)
-		return
-	}
-	r.conns[src]++
-
-	destConns := r.conns[dest.ID]
-	if destConns >= r.rc.MaxCircuits {
-		r.conns[src]--
-		r.mx.Unlock()
-		log.Debugf("refusing connection from %s to %s; too many connecitons to %s", src, dest.ID, dest.ID)
-		r.handleError(s, pbv2.Status_RESOURCE_LIMIT_EXCEEDED)
-		return
-	}
-	r.conns[dest.ID]++
-	r.mx.Unlock()
-
-	cleanup := func() {
-		r.mx.Lock()
-		r.conns[src]--
-		r.conns[dest.ID]--
-		r.mx.Unlock()
-	}
-
-	ctx, cancel := context.WithTimeout(r.ctx, ConnectTimeout)
-	defer cancel()
-
-	ctx = network.WithNoDial(ctx, "relay connect")
-
-	bs, err := r.host.NewStream(ctx, dest.ID, proto.ProtoIDv2Stop)
-	if err != nil {
-		log.Debugf("error opening relay stream to %s: %s", dest.ID, err)
-		cleanup()
-		r.handleError(s, pbv2.Status_CONNECTION_FAILED)
-		return
-	}
-
-	// handshake
-	rd := util.NewDelimitedReader(bs, maxMessageSize)
-	wr := util.NewDelimitedWriter(bs)
-	defer rd.Close()
-
-	var stopmsg pbv2.StopMessage
-	stopmsg.Type = pbv2.StopMessage_CONNECT.Enum()
-	stopmsg.Peer = util.PeerInfoToPeerV2(peer.AddrInfo{ID: src})
-	stopmsg.Limit = r.makeLimitMsg(dest.ID)
-
-	bs.SetDeadline(time.Now().Add(HandshakeTimeout))
-
-	err = wr.WriteMsg(&stopmsg)
-	if err != nil {
-		log.Debugf("error writing stop handshake")
-		bs.Reset()
-		cleanup()
-		r.handleError(s, pbv2.Status_CONNECTION_FAILED)
-		return
-	}
-
-	stopmsg.Reset()
-
-	err = rd.ReadMsg(&stopmsg)
-	if err != nil {
-		log.Debugf("error reading stop response: %s", err.Error())
-		bs.Reset()
-		cleanup()
-		r.handleError(s, pbv2.Status_CONNECTION_FAILED)
-		return
-	}
-
-	if t := stopmsg.GetType(); t != pbv2.StopMessage_STATUS {
-		log.Debugf("unexpected stop response; not a status message (%d)", t)
-		bs.Reset()
-		cleanup()
-		r.handleError(s, pbv2.Status_CONNECTION_FAILED)
-		return
-	}
-
-	if status := stopmsg.GetStatus(); status != pbv2.Status_OK {
-		log.Debugf("relay stop failure: %d", status)
-		bs.Reset()
-		cleanup()
-		r.handleError(s, pbv2.Status_CONNECTION_FAILED)
-		return
-	}
-
-	var response pbv2.HopMessage
-	response.Type = pbv2.HopMessage_STATUS.Enum()
-	response.Status = pbv2.Status_OK.Enum()
-	response.Limit = r.makeLimitMsg(dest.ID)
-
-	wr = util.NewDelimitedWriter(s)
-	err = wr.WriteMsg(&response)
-	if err != nil {
-		log.Debugf("error writing relay response: %s", err)
-		bs.Reset()
-		s.Reset()
-		cleanup()
-		return
-	}
-
-	// reset deadline
-	bs.SetDeadline(time.Time{})
-
-	log.Infof("relaying connection from %s to %s", src, dest.ID)
-
-	goroutines := new(int32)
-	*goroutines = 2
-
-	done := func() {
-		if atomic.AddInt32(goroutines, -1) == 0 {
-			s.Close()
-			bs.Close()
-			cleanup()
-		}
-	}
-
-	if r.rc.Limit != nil {
-		deadline := time.Now().Add(r.rc.Limit.Duration)
-		s.SetDeadline(deadline)
-		bs.SetDeadline(deadline)
-		go r.relayLimited(s, bs, src, dest.ID, r.rc.Limit.Data, done)
-		go r.relayLimited(bs, s, dest.ID, src, r.rc.Limit.Data, done)
-	} else {
-		go r.relayUnlimited(s, bs, src, dest.ID, done)
-		go r.relayUnlimited(bs, s, dest.ID, src, done)
-	}
-}
-
-func (r *Relay) relayLimited(src, dest network.Stream, srcID, destID peer.ID, limit int64, done func()) {
-	defer done()
-
-	buf := pool.Get(r.rc.BufferSize)
-	defer pool.Put(buf)
-
-	limitedSrc := io.LimitReader(src, limit)
-
-	count, err := io.CopyBuffer(dest, limitedSrc, buf)
-	if err != nil {
-		log.Debugf("relay copy error: %s", err)
-		// Reset both.
-		src.Reset()
-		dest.Reset()
-	} else {
-		// propagate the close
-		dest.CloseWrite()
-		if count == limit {
-			// we've reached the limit, discard further input
-			src.CloseRead()
-		}
-	}
-
-	log.Debugf("relayed %d bytes from %s to %s", count, srcID, destID)
-}
-
-func (r *Relay) relayUnlimited(src, dest network.Stream, srcID, destID peer.ID, done func()) {
-	defer done()
-
-	buf := pool.Get(r.rc.BufferSize)
-	defer pool.Put(buf)
-
-	count, err := io.CopyBuffer(dest, src, buf)
-	if err != nil {
-		log.Debugf("relay copy error: %s", err)
-		// Reset both.
-		src.Reset()
-		dest.Reset()
-	} else {
-		// propagate the close
-		dest.CloseWrite()
-	}
-
-	log.Debugf("relayed %d bytes from %s to %s", count, srcID, destID)
-}
-
-func (r *Relay) handleError(s network.Stream, status pbv2.Status) {
-	log.Debugf("relay error: %s (%d)", pbv2.Status_name[int32(status)], status)
-	err := r.writeResponse(s, status, nil, nil)
-	if err != nil {
-		s.Reset()
-		log.Debugf("error writing relay response: %s", err.Error())
-	} else {
-		s.Close()
-	}
-}
-
-func (r *Relay) writeResponse(s network.Stream, status pbv2.Status, rsvp *pbv2.Reservation, limit *pbv2.Limit) error {
-	wr := util.NewDelimitedWriter(s)
-
-	var msg pbv2.HopMessage
-	msg.Type = pbv2.HopMessage_STATUS.Enum()
-	msg.Status = status.Enum()
-	msg.Reservation = rsvp
-	msg.Limit = limit
-
-	return wr.WriteMsg(&msg)
-}
-
-func (r *Relay) makeReservationMsg(p peer.ID, expire time.Time) *pbv2.Reservation {
-	expireUnix := uint64(expire.Unix())
-
-	var addrBytes [][]byte
-	for _, addr := range r.host.Addrs() {
-		if !manet.IsPublicAddr(addr) {
-			continue
-		}
-
-		addr = addr.Encapsulate(r.selfAddr)
-		addrBytes = append(addrBytes, addr.Bytes())
-	}
-
-	rsvp := &pbv2.Reservation{
-		Expire: &expireUnix,
-		Addrs:  addrBytes,
-	}
-
-	voucher := &proto.ReservationVoucher{
-		Relay:      r.host.ID(),
-		Peer:       p,
-		Expiration: expire,
-	}
-
-	envelope, err := record.Seal(voucher, r.host.Peerstore().PrivKey(r.host.ID()))
-	if err != nil {
-		log.Errorf("error sealing voucher for %s: %s", p, err)
-		return rsvp
-	}
-
-	blob, err := envelope.Marshal()
-	if err != nil {
-		log.Errorf("error marshalling voucher for %s: %s", p, err)
-		return rsvp
-	}
-
-	rsvp.Voucher = blob
-
-	return rsvp
-}
-
-func (r *Relay) makeLimitMsg(p peer.ID) *pbv2.Limit {
-	if r.rc.Limit == nil {
-		return nil
-	}
-
-	duration := uint32(r.rc.Limit.Duration / time.Second)
-	data := uint64(r.rc.Limit.Data)
-
-	return &pbv2.Limit{
-		Duration: &duration,
-		Data:     &data,
-	}
-}
-
-func (r *Relay) background() {
-	ticker := time.NewTicker(time.Minute)
-	defer ticker.Stop()
-
-	for {
-		select {
-		case <-ticker.C:
-			r.gc()
-		case <-r.ctx.Done():
-			return
-		}
-	}
-}
-
-func (r *Relay) gc() {
-	r.mx.Lock()
-	defer r.mx.Unlock()
-
-	now := time.Now()
-
-	for p, expire := range r.rsvp {
-		if expire.Before(now) {
-			delete(r.rsvp, p)
-			r.host.ConnManager().UntagPeer(p, "relay-reservation")
-		}
-	}
-
-	for p, count := range r.conns {
-		if count == 0 {
-			delete(r.conns, p)
-		}
-	}
-}
-
-func (r *Relay) disconnected(n network.Network, c network.Conn) {
-	p := c.RemotePeer()
-	if n.Connectedness(p) == network.Connected {
-		return
-	}
-
-	r.mx.Lock()
-	defer r.mx.Unlock()
-
-	delete(r.rsvp, p)
-}
diff --git a/p2p/host/circuitv2/relay/resources.go b/p2p/host/circuitv2/relay/resources.go
deleted file mode 100644
index 0ae01698..00000000
--- a/p2p/host/circuitv2/relay/resources.go
+++ /dev/null
@@ -1,66 +0,0 @@
-package relay
-
-import (
-	"time"
-)
-
-// Resources are the resource limits associated with the relay service.
-type Resources struct {
-	// Limit is the (optional) relayed connection limits.
-	Limit *RelayLimit
-
-	// ReservationTTL is the duration of a new (or refreshed reservation).
-	// Defaults to 1hr.
-	ReservationTTL time.Duration
-
-	// MaxReservations is the maximum number of active relay slots; defaults to 128.
-	MaxReservations int
-	// MaxCircuits is the maximum number of open relay connections for each peer; defaults to 16.
-	MaxCircuits int
-	// BufferSize is the size of the relayed connection buffers; defaults to 2048.
-	BufferSize int
-
-	// MaxReservationsPerPeer is the maximum number of reservations originating from the same
-	// peer; default is 4.
-	MaxReservationsPerPeer int
-	// MaxReservationsPerIP is the maximum number of reservations originating from the same
-	// IP address; default is 8.
-	MaxReservationsPerIP int
-	// MaxReservationsPerASN is the maximum number of reservations origination from the same
-	// ASN; default is 32
-	MaxReservationsPerASN int
-}
-
-// RelayLimit are the per relayed connection resource limits.
-type RelayLimit struct {
-	// Duration is the time limit before resetting a relayed connection; defaults to 2min.
-	Duration time.Duration
-	// Data is the limit of data relayed (on each direction) before resetting the connection.
-	// Defaults to 128KB
-	Data int64
-}
-
-// DefaultResources returns a Resources object with the default filled in.
-func DefaultResources() Resources {
-	return Resources{
-		Limit: DefaultLimit(),
-
-		ReservationTTL: time.Hour,
-
-		MaxReservations: 128,
-		MaxCircuits:     16,
-		BufferSize:      2048,
-
-		MaxReservationsPerPeer: 4,
-		MaxReservationsPerIP:   8,
-		MaxReservationsPerASN:  32,
-	}
-}
-
-// DefaultLimit returns a RelayLimit object with the defaults filled in.
-func DefaultLimit() *RelayLimit {
-	return &RelayLimit{
-		Duration: 2 * time.Minute,
-		Data:     1 << 17, // 128K
-	}
-}
diff --git a/p2p/host/circuitv2/util/io.go b/p2p/host/circuitv2/util/io.go
deleted file mode 100644
index 911bad19..00000000
--- a/p2p/host/circuitv2/util/io.go
+++ /dev/null
@@ -1,67 +0,0 @@
-package util
-
-import (
-	"errors"
-	"io"
-
-	pool "github.com/libp2p/go-buffer-pool"
-	"github.com/libp2p/go-msgio/protoio"
-
-	"github.com/gogo/protobuf/proto"
-	"github.com/multiformats/go-varint"
-)
-
-type DelimitedReader struct {
-	r   io.Reader
-	buf []byte
-}
-
-// The gogo protobuf NewDelimitedReader is buffered, which may eat up stream data.
-// So we need to implement a compatible delimited reader that reads unbuffered.
-// There is a slowdown from unbuffered reading: when reading the message
-// it can take multiple single byte Reads to read the length and another Read
-// to read the message payload.
-// However, this is not critical performance degradation as
-// - the reader is utilized to read one (dialer, stop) or two messages (hop) during
-//   the handshake, so it's a drop in the water for the connection lifetime.
-// - messages are small (max 4k) and the length fits in a couple of bytes,
-//   so overall we have at most three reads per message.
-func NewDelimitedReader(r io.Reader, maxSize int) *DelimitedReader {
-	return &DelimitedReader{r: r, buf: pool.Get(maxSize)}
-}
-
-func (d *DelimitedReader) Close() {
-	if d.buf != nil {
-		pool.Put(d.buf)
-		d.buf = nil
-	}
-}
-
-func (d *DelimitedReader) ReadByte() (byte, error) {
-	buf := d.buf[:1]
-	_, err := d.r.Read(buf)
-	return buf[0], err
-}
-
-func (d *DelimitedReader) ReadMsg(msg proto.Message) error {
-	mlen, err := varint.ReadUvarint(d)
-	if err != nil {
-		return err
-	}
-
-	if uint64(len(d.buf)) < mlen {
-		return errors.New("message too large")
-	}
-
-	buf := d.buf[:mlen]
-	_, err = io.ReadFull(d.r, buf)
-	if err != nil {
-		return err
-	}
-
-	return proto.Unmarshal(buf, msg)
-}
-
-func NewDelimitedWriter(w io.Writer) protoio.WriteCloser {
-	return protoio.NewDelimitedWriter(w)
-}
diff --git a/p2p/host/circuitv2/util/ma.go b/p2p/host/circuitv2/util/ma.go
deleted file mode 100644
index 0dd820e2..00000000
--- a/p2p/host/circuitv2/util/ma.go
+++ /dev/null
@@ -1,10 +0,0 @@
-package util
-
-import (
-	ma "github.com/multiformats/go-multiaddr"
-)
-
-func IsRelayAddr(a ma.Multiaddr) bool {
-	_, err := a.ValueForProtocol(ma.P_CIRCUIT)
-	return err == nil
-}
diff --git a/p2p/host/circuitv2/util/pbconv.go b/p2p/host/circuitv2/util/pbconv.go
deleted file mode 100644
index 63074acc..00000000
--- a/p2p/host/circuitv2/util/pbconv.go
+++ /dev/null
@@ -1,97 +0,0 @@
-package util
-
-import (
-	"errors"
-
-	pbv1 "github.com/libp2p/go-libp2p-circuit/pb"
-	pbv2 "github.com/libp2p/go-libp2p/p2p/host/circuitv2/pb"
-
-	"github.com/libp2p/go-libp2p-core/peer"
-
-	ma "github.com/multiformats/go-multiaddr"
-)
-
-func PeerToPeerInfoV1(p *pbv1.CircuitRelay_Peer) (peer.AddrInfo, error) {
-	if p == nil {
-		return peer.AddrInfo{}, errors.New("nil peer")
-	}
-
-	id, err := peer.IDFromBytes(p.Id)
-	if err != nil {
-		return peer.AddrInfo{}, err
-	}
-
-	var addrs []ma.Multiaddr
-	if len(p.Addrs) > 0 {
-		addrs = make([]ma.Multiaddr, 0, len(p.Addrs))
-	}
-
-	for _, addrBytes := range p.Addrs {
-		a, err := ma.NewMultiaddrBytes(addrBytes)
-		if err == nil {
-			addrs = append(addrs, a)
-		}
-	}
-
-	return peer.AddrInfo{ID: id, Addrs: addrs}, nil
-}
-
-func PeerInfoToPeerV1(pi peer.AddrInfo) *pbv1.CircuitRelay_Peer {
-	var addrs [][]byte
-	if len(pi.Addrs) > 0 {
-		addrs = make([][]byte, 0, len(pi.Addrs))
-	}
-
-	for _, addr := range pi.Addrs {
-		addrs = append(addrs, addr.Bytes())
-	}
-
-	p := new(pbv1.CircuitRelay_Peer)
-	p.Id = []byte(pi.ID)
-	p.Addrs = addrs
-
-	return p
-}
-
-func PeerToPeerInfoV2(p *pbv2.Peer) (peer.AddrInfo, error) {
-	if p == nil {
-		return peer.AddrInfo{}, errors.New("nil peer")
-	}
-
-	id, err := peer.IDFromBytes(p.Id)
-	if err != nil {
-		return peer.AddrInfo{}, err
-	}
-
-	var addrs []ma.Multiaddr
-	if len(p.Addrs) > 0 {
-		addrs = make([]ma.Multiaddr, 0, len(p.Addrs))
-	}
-
-	for _, addrBytes := range p.Addrs {
-		a, err := ma.NewMultiaddrBytes(addrBytes)
-		if err == nil {
-			addrs = append(addrs, a)
-		}
-	}
-
-	return peer.AddrInfo{ID: id, Addrs: addrs}, nil
-}
-
-func PeerInfoToPeerV2(pi peer.AddrInfo) *pbv2.Peer {
-	var addrs [][]byte
-
-	if len(pi.Addrs) > 0 {
-		addrs = make([][]byte, 0, len(pi.Addrs))
-	}
-
-	for _, addr := range pi.Addrs {
-		addrs = append(addrs, addr.Bytes())
-	}
-
-	p := new(pbv2.Peer)
-	p.Id = []byte(pi.ID)
-	p.Addrs = addrs
-
-	return p
-}
diff --git a/p2p/host/relay/autorelay.go b/p2p/host/relay/autorelay.go
index a8092add..11c1a3c9 100644
--- a/p2p/host/relay/autorelay.go
+++ b/p2p/host/relay/autorelay.go
@@ -33,8 +33,11 @@ var (
 // These are the known PL-operated relays
 var DefaultRelays = []string{
 	"/ip4/147.75.80.110/tcp/4001/p2p/QmbFgm5zan8P6eWWmeyfncR5feYEMPbht5b1FW1C37aQ7y",
+	"/ip4/147.75.80.110/udp/4001/quic/p2p/QmbFgm5zan8P6eWWmeyfncR5feYEMPbht5b1FW1C37aQ7y",
 	"/ip4/147.75.195.153/tcp/4001/p2p/QmW9m57aiBDHAkKj9nmFSEn7ZqrcF1fZS4bipsTCHburei",
+	"/ip4/147.75.195.153/udp/4001/quic/p2p/QmW9m57aiBDHAkKj9nmFSEn7ZqrcF1fZS4bipsTCHburei",
 	"/ip4/147.75.70.221/tcp/4001/p2p/Qme8g49gm3q4Acp7xWBKg3nAa9fxZ1YmyDJdyGgoG6LsXh",
+	"/ip4/147.75.70.221/udp/4001/quic/p2p/Qme8g49gm3q4Acp7xWBKg3nAa9fxZ1YmyDJdyGgoG6LsXh",
 }
 
 // AutoRelay is a Host that uses relays for connectivity when a NAT is detected.
diff --git a/p2p/protocol/holepunch/coordination.go b/p2p/protocol/holepunch/coordination.go
new file mode 100644
index 00000000..64d4d297
--- /dev/null
+++ b/p2p/protocol/holepunch/coordination.go
@@ -0,0 +1,404 @@
+package holepunch
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/libp2p/go-libp2p-core/host"
+	"github.com/libp2p/go-libp2p-core/network"
+	"github.com/libp2p/go-libp2p-core/peer"
+	"github.com/libp2p/go-libp2p-core/protocol"
+	pb "github.com/libp2p/go-libp2p/p2p/protocol/holepunch/pb"
+	"github.com/libp2p/go-libp2p/p2p/protocol/identify"
+
+	logging "github.com/ipfs/go-log/v2"
+	"github.com/libp2p/go-msgio/protoio"
+	ma "github.com/multiformats/go-multiaddr"
+	manet "github.com/multiformats/go-multiaddr/net"
+)
+
+// Protocol is the libp2p protocol for Hole Punching.
+const Protocol protocol.ID = "/libp2p/dcutr"
+
+// StreamTimeout is the timeout for the hole punch protocol stream.
+var StreamTimeout = 1 * time.Minute
+
+// TODO Should we have options for these ?
+const (
+	maxMsgSize  = 4 * 1024 // 4K
+	dialTimeout = 5 * time.Second
+	maxRetries  = 3
+	retryWait   = 2 * time.Second
+)
+
+var (
+	log = logging.Logger("p2p-holepunch")
+	// ErrHolePunchActive is returned from DirectConnect when another hole punching attempt is currently running
+	ErrHolePunchActive = errors.New("another hole punching attempt to this peer is active")
+	// ErrClosed is returned when the hole punching is closed
+	ErrClosed = errors.New("hole punching service closing")
+)
+
+// The Service is used to make direct connections with a peer via hole-punching.
+type Service struct {
+	ctx       context.Context
+	ctxCancel context.CancelFunc
+
+	ids  *identify.IDService
+	host host.Host
+
+	tracer *tracer
+
+	closeMx  sync.RWMutex
+	closed   bool
+	refCount sync.WaitGroup
+
+	// active hole punches for deduplicating
+	activeMx sync.Mutex
+	active   map[peer.ID]struct{}
+}
+
+type Option func(*Service) error
+
+// NewService creates a new service that can be used for hole punching
+func NewService(h host.Host, ids *identify.IDService, opts ...Option) (*Service, error) {
+	if ids == nil {
+		return nil, errors.New("identify service can't be nil")
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	hs := &Service{
+		ctx:       ctx,
+		ctxCancel: cancel,
+		host:      h,
+		ids:       ids,
+		active:    make(map[peer.ID]struct{}),
+	}
+
+	for _, opt := range opts {
+		if err := opt(hs); err != nil {
+			cancel()
+			return nil, err
+		}
+	}
+
+	h.SetStreamHandler(Protocol, hs.handleNewStream)
+	h.Network().Notify((*netNotifiee)(hs))
+	return hs, nil
+}
+
+// Close closes the Hole Punch Service.
+func (hs *Service) Close() error {
+	hs.closeMx.Lock()
+	hs.closed = true
+	hs.closeMx.Unlock()
+	hs.tracer.Close()
+	hs.host.RemoveStreamHandler(Protocol)
+	hs.ctxCancel()
+	hs.refCount.Wait()
+	return nil
+}
+
+// initiateHolePunch opens a new hole punching coordination stream,
+// exchanges the addresses and measures the RTT.
+func (hs *Service) initiateHolePunch(rp peer.ID) ([]ma.Multiaddr, time.Duration, error) {
+	hpCtx := network.WithUseTransient(hs.ctx, "hole-punch")
+	sCtx := network.WithNoDial(hpCtx, "hole-punch")
+	str, err := hs.host.NewStream(sCtx, rp, Protocol)
+	if err != nil {
+		return nil, 0, fmt.Errorf("failed to open hole-punching stream with peer %s: %w", rp, err)
+	}
+	defer str.Close()
+	str.SetDeadline(time.Now().Add(StreamTimeout))
+
+	w := protoio.NewDelimitedWriter(str)
+
+	// send a CONNECT and start RTT measurement.
+	msg := &pb.HolePunch{
+		Type:     pb.HolePunch_CONNECT.Enum(),
+		ObsAddrs: addrsToBytes(hs.ids.OwnObservedAddrs()),
+	}
+
+	start := time.Now()
+	if err := w.WriteMsg(msg); err != nil {
+		str.Reset()
+		return nil, 0, err
+	}
+
+	// wait for a CONNECT message from the remote peer
+	rd := protoio.NewDelimitedReader(str, maxMsgSize)
+	msg.Reset()
+	if err := rd.ReadMsg(msg); err != nil {
+		str.Reset()
+		return nil, 0, fmt.Errorf("failed to read CONNECT message from remote peer: %w", err)
+	}
+	rtt := time.Since(start)
+
+	if t := msg.GetType(); t != pb.HolePunch_CONNECT {
+		str.Reset()
+		return nil, 0, fmt.Errorf("expect CONNECT message, got %s", t)
+	}
+
+	addrs := addrsFromBytes(msg.ObsAddrs)
+
+	msg.Reset()
+	msg.Type = pb.HolePunch_SYNC.Enum()
+	if err := w.WriteMsg(msg); err != nil {
+		str.Reset()
+		return nil, 0, fmt.Errorf("failed to send SYNC message for hole punching: %w", err)
+	}
+	return addrs, rtt, nil
+}
+
+func (hs *Service) beginDirectConnect(p peer.ID) error {
+	hs.closeMx.RLock()
+	defer hs.closeMx.RUnlock()
+	if hs.closed {
+		return ErrClosed
+	}
+
+	hs.activeMx.Lock()
+	defer hs.activeMx.Unlock()
+	if _, ok := hs.active[p]; ok {
+		return ErrHolePunchActive
+	}
+
+	hs.active[p] = struct{}{}
+	return nil
+}
+
+// DirectConnect attempts to make a direct connection with a remote peer.
+// It first attempts a direct dial (if we have a public address of that peer), and then
+// coordinates a hole punch over the given relay connection.
+func (hs *Service) DirectConnect(p peer.ID) error {
+	log.Debugw("got inbound proxy conn from peer", p)
+	if err := hs.beginDirectConnect(p); err != nil {
+		return err
+	}
+
+	defer func() {
+		hs.activeMx.Lock()
+		delete(hs.active, p)
+		hs.activeMx.Unlock()
+	}()
+
+	return hs.directConnect(p)
+}
+
+func (hs *Service) directConnect(rp peer.ID) error {
+	// short-circuit check to see if we already have a direct connection
+	for _, c := range hs.host.Network().ConnsToPeer(rp) {
+		if !isRelayAddress(c.RemoteMultiaddr()) {
+			return nil
+		}
+	}
+
+	// short-circuit hole punching if a direct dial works.
+	// attempt a direct connection ONLY if we have a public address for the remote peer
+	for _, a := range hs.host.Peerstore().Addrs(rp) {
+		if manet.IsPublicAddr(a) && !isRelayAddress(a) {
+			forceDirectConnCtx := network.WithForceDirectDial(hs.ctx, "hole-punching")
+			dialCtx, cancel := context.WithTimeout(forceDirectConnCtx, dialTimeout)
+
+			tstart := time.Now()
+			// This dials *all* public addresses from the peerstore.
+			err := hs.host.Connect(dialCtx, peer.AddrInfo{ID: rp})
+			dt := time.Since(tstart)
+			cancel()
+
+			if err != nil {
+				hs.tracer.DirectDialFailed(rp, dt, err)
+				break
+			}
+			hs.tracer.DirectDialSuccessful(rp, dt)
+			log.Debugf("direct connection to peer %s successful, no need for a hole punch", rp.Pretty())
+			return nil
+		}
+	}
+
+	// hole punch
+	for i := 0; i < maxRetries; i++ {
+		addrs, rtt, err := hs.initiateHolePunch(rp)
+		if err != nil {
+			log.Debugw("hole punching failed to peer", rp, "error", err)
+			hs.tracer.ProtocolError(rp, err)
+			return err
+		}
+		synTime := rtt / 2
+		log.Debugf("peer RTT is %s; starting hole punch in %s", rtt, synTime)
+
+		// wait for sync to reach the other peer and then punch a hole for it in our NAT
+		// by attempting a connect to it.
+		timer := time.NewTimer(synTime)
+		select {
+		case start := <-timer.C:
+			pi := peer.AddrInfo{
+				ID:    rp,
+				Addrs: addrs,
+			}
+			hs.tracer.StartHolePunch(rp, addrs, rtt)
+			err := hs.holePunchConnect(pi)
+			dt := time.Since(start)
+			hs.tracer.EndHolePunch(rp, dt, err)
+			if err == nil {
+				log.Debugw("hole punching with", rp, "successful after", dt)
+				return nil
+			}
+		case <-hs.ctx.Done():
+			timer.Stop()
+			return hs.ctx.Err()
+		}
+	}
+	return fmt.Errorf("all retries for hole punch with peer %s failed", rp)
+}
+
+func (hs *Service) incomingHolePunch(s network.Stream) (rtt time.Duration, addrs []ma.Multiaddr, err error) {
+	// sanity check: a hole punch request should only come from peers behind a relay
+	if !isRelayAddress(s.Conn().RemoteMultiaddr()) {
+		return 0, nil, fmt.Errorf("received hole punch stream: %s", s.Conn().RemoteMultiaddr())
+	}
+
+	log.Debugw("got hole punch request from peer", s.Conn().RemotePeer().Pretty())
+	_ = s.SetDeadline(time.Now().Add(StreamTimeout))
+	wr := protoio.NewDelimitedWriter(s)
+	rd := protoio.NewDelimitedReader(s, maxMsgSize)
+
+	// Read Connect message
+	msg := new(pb.HolePunch)
+	if err := rd.ReadMsg(msg); err != nil {
+		return 0, nil, fmt.Errorf("failed to read message from initator: %w", err)
+	}
+	if t := msg.GetType(); t != pb.HolePunch_CONNECT {
+		return 0, nil, fmt.Errorf("expected CONNECT message from initiator but got %d", t)
+	}
+	obsDial := addrsFromBytes(msg.ObsAddrs)
+
+	// Write CONNECT message
+	msg.Reset()
+	msg.Type = pb.HolePunch_CONNECT.Enum()
+	msg.ObsAddrs = addrsToBytes(hs.ids.OwnObservedAddrs())
+	tstart := time.Now()
+	if err := wr.WriteMsg(msg); err != nil {
+		return 0, nil, fmt.Errorf("failed to write CONNECT message to initator: %w", err)
+	}
+
+	// Read SYNC message
+	msg.Reset()
+	if err := rd.ReadMsg(msg); err != nil {
+		return 0, nil, fmt.Errorf("failed to read message from initator: %w", err)
+	}
+	if t := msg.GetType(); t != pb.HolePunch_SYNC {
+		return 0, nil, fmt.Errorf("expected SYNC message from initiator but got %d", t)
+	}
+	return time.Since(tstart), obsDial, nil
+}
+
+func (hs *Service) handleNewStream(s network.Stream) {
+	// Check directionality of the underlying connection.
+	// Peer A receives an inbound connection from peer B.
+	// Peer A opens a new hole punch stream to peer B.
+	// Peer B receives this stream, calling this function.
+	// Peer B sees the underlying connection as an outbound connection.
+	if s.Conn().Stat().Direction == network.DirInbound {
+		s.Reset()
+		return
+	}
+	rp := s.Conn().RemotePeer()
+	rtt, addrs, err := hs.incomingHolePunch(s)
+	if err != nil {
+		hs.tracer.ProtocolError(rp, err)
+		log.Debugw("error handling holepunching stream from", rp, "error", err)
+		s.Reset()
+		return
+	}
+	s.Close()
+
+	// Hole punch now by forcing a connect
+	pi := peer.AddrInfo{
+		ID:    rp,
+		Addrs: addrs,
+	}
+	hs.tracer.StartHolePunch(rp, addrs, rtt)
+	log.Debugw("starting hole punch with", rp)
+	start := time.Now()
+	err = hs.holePunchConnect(pi)
+	dt := time.Since(start)
+	hs.tracer.EndHolePunch(rp, dt, err)
+	if err != nil {
+		log.Debugw("hole punching peer", rp, "failed after", dt, "error", err)
+	} else {
+		log.Debugw("hole punching peer", rp, "succeeded after", dt)
+	}
+}
+
+func (hs *Service) holePunchConnect(pi peer.AddrInfo) error {
+	holePunchCtx := network.WithSimultaneousConnect(hs.ctx, "hole-punching")
+	forceDirectConnCtx := network.WithForceDirectDial(holePunchCtx, "hole-punching")
+	dialCtx, cancel := context.WithTimeout(forceDirectConnCtx, dialTimeout)
+	defer cancel()
+
+	hs.tracer.HolePunchAttempt(pi.ID)
+	err := hs.host.Connect(dialCtx, pi)
+	if err == nil {
+		log.Debugw("hole punch with peer", pi.ID, "successful")
+	}
+	log.Debugw("hole punch attempt with peer", pi.ID, "failed:", err)
+	return err
+}
+
+func isRelayAddress(a ma.Multiaddr) bool {
+	_, err := a.ValueForProtocol(ma.P_CIRCUIT)
+	return err == nil
+}
+
+func addrsToBytes(as []ma.Multiaddr) [][]byte {
+	bzs := make([][]byte, 0, len(as))
+	for _, a := range as {
+		bzs = append(bzs, a.Bytes())
+	}
+	return bzs
+}
+
+func addrsFromBytes(bzs [][]byte) []ma.Multiaddr {
+	addrs := make([]ma.Multiaddr, 0, len(bzs))
+	for _, bz := range bzs {
+		a, err := ma.NewMultiaddrBytes(bz)
+		if err == nil {
+			addrs = append(addrs, a)
+		}
+	}
+	return addrs
+}
+
+type netNotifiee Service
+
+func (nn *netNotifiee) Connected(_ network.Network, conn network.Conn) {
+	hs := (*Service)(nn)
+
+	// Hole punch if it's an inbound proxy connection.
+	// If we already have a direct connection with the remote peer, this will be a no-op.
+	if conn.Stat().Direction == network.DirInbound && isRelayAddress(conn.RemoteMultiaddr()) {
+		hs.refCount.Add(1)
+		go func() {
+			defer hs.refCount.Done()
+
+			select {
+			// waiting for Identify here will allow us to access the peer's public and observed addresses
+			// that we can dial to for a hole punch.
+			case <-hs.ids.IdentifyWait(conn):
+			case <-hs.ctx.Done():
+			}
+
+			_ = hs.DirectConnect(conn.RemotePeer())
+		}()
+	}
+}
+
+func (nn *netNotifiee) Disconnected(_ network.Network, v network.Conn)   {}
+func (nn *netNotifiee) OpenedStream(n network.Network, v network.Stream) {}
+func (nn *netNotifiee) ClosedStream(n network.Network, v network.Stream) {}
+func (nn *netNotifiee) Listen(n network.Network, a ma.Multiaddr)         {}
+func (nn *netNotifiee) ListenClose(n network.Network, a ma.Multiaddr)    {}
diff --git a/p2p/host/circuitv2/pb/Makefile b/p2p/protocol/holepunch/pb/Makefile
similarity index 66%
rename from p2p/host/circuitv2/pb/Makefile
rename to p2p/protocol/holepunch/pb/Makefile
index c360a6fb..eb14b576 100644
--- a/p2p/host/circuitv2/pb/Makefile
+++ b/p2p/protocol/holepunch/pb/Makefile
@@ -4,7 +4,7 @@ GO = $(PB:.proto=.pb.go)
 all: $(GO)
 
 %.pb.go: %.proto
-		protoc  --gogofast_out=. $<
+		protoc --proto_path=$(GOPATH)/src:. --gogofast_out=. $<
 
 clean:
 		rm -f *.pb.go
diff --git a/p2p/protocol/holepunch/pb/holepunch.pb.go b/p2p/protocol/holepunch/pb/holepunch.pb.go
new file mode 100644
index 00000000..0f2452eb
--- /dev/null
+++ b/p2p/protocol/holepunch/pb/holepunch.pb.go
@@ -0,0 +1,414 @@
+// Code generated by protoc-gen-gogo. DO NOT EDIT.
+// source: holepunch.proto
+
+package holepunch_pb
+
+import (
+	fmt "fmt"
+	proto "github.com/gogo/protobuf/proto"
+	io "io"
+	math "math"
+	math_bits "math/bits"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
+
+type HolePunch_Type int32
+
+const (
+	HolePunch_CONNECT HolePunch_Type = 100
+	HolePunch_SYNC    HolePunch_Type = 300
+)
+
+var HolePunch_Type_name = map[int32]string{
+	100: "CONNECT",
+	300: "SYNC",
+}
+
+var HolePunch_Type_value = map[string]int32{
+	"CONNECT": 100,
+	"SYNC":    300,
+}
+
+func (x HolePunch_Type) Enum() *HolePunch_Type {
+	p := new(HolePunch_Type)
+	*p = x
+	return p
+}
+
+func (x HolePunch_Type) String() string {
+	return proto.EnumName(HolePunch_Type_name, int32(x))
+}
+
+func (x *HolePunch_Type) UnmarshalJSON(data []byte) error {
+	value, err := proto.UnmarshalJSONEnum(HolePunch_Type_value, data, "HolePunch_Type")
+	if err != nil {
+		return err
+	}
+	*x = HolePunch_Type(value)
+	return nil
+}
+
+func (HolePunch_Type) EnumDescriptor() ([]byte, []int) {
+	return fileDescriptor_290ddea0f23ef64a, []int{0, 0}
+}
+
+type HolePunch struct {
+	Type *HolePunch_Type `protobuf:"varint,1,opt,name=type,enum=holepunch.pb.HolePunch_Type" json:"type,omitempty"`
+	// For hole punching, we'll send some additional observed addresses to the remote peer
+	// that could have been filtered by the Host address factory (for example: AutoRelay removes all public addresses if peer has private reachability).
+	// This is a hack!
+	// We plan to have a better address discovery and advertisement mechanism in the future.
+	// See https://github.com/libp2p/go-libp2p-autonat/pull/98
+	ObsAddrs             [][]byte `protobuf:"bytes,2,rep,name=ObsAddrs" json:"ObsAddrs,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *HolePunch) Reset()         { *m = HolePunch{} }
+func (m *HolePunch) String() string { return proto.CompactTextString(m) }
+func (*HolePunch) ProtoMessage()    {}
+func (*HolePunch) Descriptor() ([]byte, []int) {
+	return fileDescriptor_290ddea0f23ef64a, []int{0}
+}
+func (m *HolePunch) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *HolePunch) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_HolePunch.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *HolePunch) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_HolePunch.Merge(m, src)
+}
+func (m *HolePunch) XXX_Size() int {
+	return m.Size()
+}
+func (m *HolePunch) XXX_DiscardUnknown() {
+	xxx_messageInfo_HolePunch.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_HolePunch proto.InternalMessageInfo
+
+func (m *HolePunch) GetType() HolePunch_Type {
+	if m != nil && m.Type != nil {
+		return *m.Type
+	}
+	return HolePunch_CONNECT
+}
+
+func (m *HolePunch) GetObsAddrs() [][]byte {
+	if m != nil {
+		return m.ObsAddrs
+	}
+	return nil
+}
+
+func init() {
+	proto.RegisterEnum("holepunch.pb.HolePunch_Type", HolePunch_Type_name, HolePunch_Type_value)
+	proto.RegisterType((*HolePunch)(nil), "holepunch.pb.HolePunch")
+}
+
+func init() { proto.RegisterFile("holepunch.proto", fileDescriptor_290ddea0f23ef64a) }
+
+var fileDescriptor_290ddea0f23ef64a = []byte{
+	// 153 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0xcf, 0xc8, 0xcf, 0x49,
+	0x2d, 0x28, 0xcd, 0x4b, 0xce, 0xd0, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0x41, 0x12, 0x48,
+	0x52, 0xaa, 0xe4, 0xe2, 0xf4, 0xc8, 0xcf, 0x49, 0x0d, 0x00, 0xf1, 0x85, 0x0c, 0xb8, 0x58, 0x4a,
+	0x2a, 0x0b, 0x52, 0x25, 0x18, 0x15, 0x18, 0x35, 0xf8, 0x8c, 0x64, 0xf4, 0x90, 0x55, 0xea, 0xc1,
+	0x95, 0xe9, 0x85, 0x54, 0x16, 0xa4, 0x06, 0x81, 0x55, 0x0a, 0x49, 0x71, 0x71, 0xf8, 0x27, 0x15,
+	0x3b, 0xa6, 0xa4, 0x14, 0x15, 0x4b, 0x30, 0x29, 0x30, 0x6b, 0xf0, 0x04, 0xc1, 0xf9, 0x4a, 0x72,
+	0x5c, 0x2c, 0x20, 0x95, 0x42, 0xdc, 0x5c, 0xec, 0xce, 0xfe, 0x7e, 0x7e, 0xae, 0xce, 0x21, 0x02,
+	0x29, 0x42, 0x9c, 0x5c, 0x2c, 0xc1, 0x91, 0x7e, 0xce, 0x02, 0x6b, 0x98, 0x9c, 0x78, 0x4e, 0x3c,
+	0x92, 0x63, 0xbc, 0xf0, 0x48, 0x8e, 0xf1, 0xc1, 0x23, 0x39, 0x46, 0x40, 0x00, 0x00, 0x00, 0xff,
+	0xff, 0x62, 0xf4, 0xc8, 0x7c, 0xa8, 0x00, 0x00, 0x00,
+}
+
+func (m *HolePunch) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *HolePunch) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *HolePunch) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.XXX_unrecognized != nil {
+		i -= len(m.XXX_unrecognized)
+		copy(dAtA[i:], m.XXX_unrecognized)
+	}
+	if len(m.ObsAddrs) > 0 {
+		for iNdEx := len(m.ObsAddrs) - 1; iNdEx >= 0; iNdEx-- {
+			i -= len(m.ObsAddrs[iNdEx])
+			copy(dAtA[i:], m.ObsAddrs[iNdEx])
+			i = encodeVarintHolepunch(dAtA, i, uint64(len(m.ObsAddrs[iNdEx])))
+			i--
+			dAtA[i] = 0x12
+		}
+	}
+	if m.Type != nil {
+		i = encodeVarintHolepunch(dAtA, i, uint64(*m.Type))
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
+func encodeVarintHolepunch(dAtA []byte, offset int, v uint64) int {
+	offset -= sovHolepunch(v)
+	base := offset
+	for v >= 1<<7 {
+		dAtA[offset] = uint8(v&0x7f | 0x80)
+		v >>= 7
+		offset++
+	}
+	dAtA[offset] = uint8(v)
+	return base
+}
+func (m *HolePunch) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.Type != nil {
+		n += 1 + sovHolepunch(uint64(*m.Type))
+	}
+	if len(m.ObsAddrs) > 0 {
+		for _, b := range m.ObsAddrs {
+			l = len(b)
+			n += 1 + l + sovHolepunch(uint64(l))
+		}
+	}
+	if m.XXX_unrecognized != nil {
+		n += len(m.XXX_unrecognized)
+	}
+	return n
+}
+
+func sovHolepunch(x uint64) (n int) {
+	return (math_bits.Len64(x|1) + 6) / 7
+}
+func sozHolepunch(x uint64) (n int) {
+	return sovHolepunch(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+func (m *HolePunch) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowHolepunch
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: HolePunch: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: HolePunch: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Type", wireType)
+			}
+			var v HolePunch_Type
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowHolepunch
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				v |= HolePunch_Type(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			m.Type = &v
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ObsAddrs", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowHolepunch
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthHolepunch
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthHolepunch
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ObsAddrs = append(m.ObsAddrs, make([]byte, postIndex-iNdEx))
+			copy(m.ObsAddrs[len(m.ObsAddrs)-1], dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipHolepunch(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthHolepunch
+			}
+			if (iNdEx + skippy) < 0 {
+				return ErrInvalidLengthHolepunch
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func skipHolepunch(dAtA []byte) (n int, err error) {
+	l := len(dAtA)
+	iNdEx := 0
+	depth := 0
+	for iNdEx < l {
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return 0, ErrIntOverflowHolepunch
+			}
+			if iNdEx >= l {
+				return 0, io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		wireType := int(wire & 0x7)
+		switch wireType {
+		case 0:
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowHolepunch
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				iNdEx++
+				if dAtA[iNdEx-1] < 0x80 {
+					break
+				}
+			}
+		case 1:
+			iNdEx += 8
+		case 2:
+			var length int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return 0, ErrIntOverflowHolepunch
+				}
+				if iNdEx >= l {
+					return 0, io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				length |= (int(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if length < 0 {
+				return 0, ErrInvalidLengthHolepunch
+			}
+			iNdEx += length
+		case 3:
+			depth++
+		case 4:
+			if depth == 0 {
+				return 0, ErrUnexpectedEndOfGroupHolepunch
+			}
+			depth--
+		case 5:
+			iNdEx += 4
+		default:
+			return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
+		}
+		if iNdEx < 0 {
+			return 0, ErrInvalidLengthHolepunch
+		}
+		if depth == 0 {
+			return iNdEx, nil
+		}
+	}
+	return 0, io.ErrUnexpectedEOF
+}
+
+var (
+	ErrInvalidLengthHolepunch        = fmt.Errorf("proto: negative length found during unmarshaling")
+	ErrIntOverflowHolepunch          = fmt.Errorf("proto: integer overflow")
+	ErrUnexpectedEndOfGroupHolepunch = fmt.Errorf("proto: unexpected end of group")
+)
diff --git a/p2p/protocol/holepunch/pb/holepunch.proto b/p2p/protocol/holepunch/pb/holepunch.proto
new file mode 100644
index 00000000..2c89c5eb
--- /dev/null
+++ b/p2p/protocol/holepunch/pb/holepunch.proto
@@ -0,0 +1,14 @@
+syntax = "proto2";
+
+package holepunch.pb;
+
+// spec: https://github.com/libp2p/specs/blob/master/relay/DCUtR.md
+message HolePunch {
+  enum Type {
+    CONNECT = 100;
+    SYNC = 300;
+  }
+
+  optional Type type=1;
+  repeated bytes ObsAddrs = 2;
+}
diff --git a/p2p/protocol/holepunch/tracer.go b/p2p/protocol/holepunch/tracer.go
new file mode 100644
index 00000000..1512ba10
--- /dev/null
+++ b/p2p/protocol/holepunch/tracer.go
@@ -0,0 +1,252 @@
+package holepunch
+
+import (
+	"context"
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/libp2p/go-libp2p-core/peer"
+
+	ma "github.com/multiformats/go-multiaddr"
+)
+
+const (
+	tracerGCInterval    = 2 * time.Minute
+	tracerCacheDuration = 5 * time.Minute
+)
+
+// WithTracer is a Service option that enables hole punching tracing
+func WithTracer(tr EventTracer) Option {
+	return func(hps *Service) error {
+		t := &tracer{
+			tr:   tr,
+			self: hps.host.ID(),
+			peers: make(map[peer.ID]struct {
+				counter int
+				last    time.Time
+			}),
+		}
+		t.refCount.Add(1)
+		t.ctx, t.ctxCancel = context.WithCancel(context.Background())
+		go t.gc()
+		hps.tracer = t
+		return nil
+	}
+}
+
+type tracer struct {
+	tr   EventTracer
+	self peer.ID
+
+	refCount  sync.WaitGroup
+	ctx       context.Context
+	ctxCancel context.CancelFunc
+
+	mutex sync.Mutex
+	peers map[peer.ID]struct {
+		counter int
+		last    time.Time
+	}
+}
+
+type EventTracer interface {
+	Trace(evt *Event)
+}
+
+type Event struct {
+	Timestamp int64       // UNIX nanos
+	Peer      peer.ID     // local peer ID
+	Remote    peer.ID     // remote peer ID
+	Type      string      // event type
+	Evt       interface{} // the actual event
+}
+
+// Event Types
+const (
+	DirectDialEvtT       = "DirectDial"
+	ProtocolErrorEvtT    = "ProtocolError"
+	StartHolePunchEvtT   = "StartHolePunch"
+	EndHolePunchEvtT     = "EndHolePunch"
+	HolePunchAttemptEvtT = "HolePunchAttempt"
+)
+
+// Event Objects
+type DirectDialEvt struct {
+	Success      bool
+	EllapsedTime time.Duration
+	Error        string `json:",omitempty"`
+}
+
+type ProtocolErrorEvt struct {
+	Error string
+}
+
+type StartHolePunchEvt struct {
+	RemoteAddrs []string
+	RTT         time.Duration
+}
+
+type EndHolePunchEvt struct {
+	Success      bool
+	EllapsedTime time.Duration
+	Error        string `json:",omitempty"`
+}
+
+type HolePunchAttemptEvt struct {
+	Attempt int
+}
+
+// tracer interface
+func (t *tracer) DirectDialSuccessful(p peer.ID, dt time.Duration) {
+	if t == nil {
+		return
+	}
+
+	t.tr.Trace(&Event{
+		Timestamp: time.Now().UnixNano(),
+		Peer:      t.self,
+		Remote:    p,
+		Type:      DirectDialEvtT,
+		Evt: &DirectDialEvt{
+			Success:      true,
+			EllapsedTime: dt,
+		},
+	})
+}
+
+func (t *tracer) DirectDialFailed(p peer.ID, dt time.Duration, err error) {
+	if t == nil {
+		return
+	}
+
+	t.tr.Trace(&Event{
+		Timestamp: time.Now().UnixNano(),
+		Peer:      t.self,
+		Remote:    p,
+		Type:      DirectDialEvtT,
+		Evt: &DirectDialEvt{
+			Success:      false,
+			EllapsedTime: dt,
+			Error:        err.Error(),
+		},
+	})
+}
+
+func (t *tracer) ProtocolError(p peer.ID, err error) {
+	if t == nil {
+		return
+	}
+
+	t.tr.Trace(&Event{
+		Timestamp: time.Now().UnixNano(),
+		Peer:      t.self,
+		Remote:    p,
+		Type:      ProtocolErrorEvtT,
+		Evt: &ProtocolErrorEvt{
+			Error: err.Error(),
+		},
+	})
+}
+
+func (t *tracer) StartHolePunch(p peer.ID, obsAddrs []ma.Multiaddr, rtt time.Duration) {
+	if t == nil {
+		return
+	}
+
+	addrs := make([]string, 0, len(obsAddrs))
+	for _, a := range obsAddrs {
+		addrs = append(addrs, a.String())
+	}
+
+	t.tr.Trace(&Event{
+		Timestamp: time.Now().UnixNano(),
+		Peer:      t.self,
+		Remote:    p,
+		Type:      StartHolePunchEvtT,
+		Evt: &StartHolePunchEvt{
+			RemoteAddrs: addrs,
+			RTT:         rtt,
+		},
+	})
+}
+
+func (t *tracer) EndHolePunch(p peer.ID, dt time.Duration, err error) {
+	if t == nil {
+		return
+	}
+
+	evt := &EndHolePunchEvt{
+		Success:      err == nil,
+		EllapsedTime: dt,
+	}
+	if err != nil {
+		evt.Error = err.Error()
+	}
+
+	t.tr.Trace(&Event{
+		Timestamp: time.Now().UnixNano(),
+		Peer:      t.self,
+		Remote:    p,
+		Type:      EndHolePunchEvtT,
+		Evt:       evt,
+	})
+}
+
+func (t *tracer) HolePunchAttempt(p peer.ID) {
+	if t == nil {
+		return
+	}
+
+	now := time.Now()
+	t.mutex.Lock()
+	attempt := t.peers[p]
+	attempt.counter++
+	counter := attempt.counter
+	attempt.last = now
+	t.peers[p] = attempt
+	t.mutex.Unlock()
+
+	t.tr.Trace(&Event{
+		Timestamp: now.UnixNano(),
+		Peer:      t.self,
+		Remote:    p,
+		Type:      HolePunchAttemptEvtT,
+		Evt:       &HolePunchAttemptEvt{Attempt: counter},
+	})
+}
+
+func (t *tracer) gc() {
+	defer func() {
+		fmt.Println("done")
+		t.refCount.Done()
+	}()
+
+	timer := time.NewTicker(tracerGCInterval)
+	defer timer.Stop()
+
+	for {
+		select {
+		case now := <-timer.C:
+			t.mutex.Lock()
+			for id, entry := range t.peers {
+				if entry.last.Before(now.Add(-tracerCacheDuration)) {
+					delete(t.peers, id)
+				}
+			}
+			t.mutex.Unlock()
+		case <-t.ctx.Done():
+			return
+		}
+	}
+}
+
+func (t *tracer) Close() error {
+	if t == nil {
+		return nil
+	}
+
+	t.ctxCancel()
+	t.refCount.Wait()
+	return nil
+}
diff --git a/p2p/protocol/identify/id.go b/p2p/protocol/identify/id.go
index 17801f12..5f9a9fe4 100644
--- a/p2p/protocol/identify/id.go
+++ b/p2p/protocol/identify/id.go
@@ -87,6 +87,8 @@ type IDService struct {
 
 	ctx       context.Context
 	ctxCancel context.CancelFunc
+	// ensure we shutdown ONLY once
+	closeSync sync.Once
 	// track resources that need to be shut down before we shut down
 	refCount sync.WaitGroup
 
@@ -124,23 +126,25 @@ func NewIDService(h host.Host, opts ...Option) (*IDService, error) {
 		userAgent = cfg.userAgent
 	}
 
+	hostCtx, cancel := context.WithCancel(context.Background())
 	s := &IDService{
 		Host:      h,
 		UserAgent: userAgent,
 
-		conns: make(map[network.Conn]chan struct{}),
+		ctx:       hostCtx,
+		ctxCancel: cancel,
+		conns:     make(map[network.Conn]chan struct{}),
 
 		disableSignedPeerRecord: cfg.disableSignedPeerRecord,
 
 		addPeerHandlerCh: make(chan addPeerHandlerReq),
 		rmPeerHandlerCh:  make(chan rmPeerHandlerReq),
 	}
-	s.ctx, s.ctxCancel = context.WithCancel(context.Background())
 
 	// handle local protocol handler updates, and push deltas to peers.
 	var err error
 
-	observedAddrs, err := NewObservedAddrManager(h)
+	observedAddrs, err := NewObservedAddrManager(hostCtx, h)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create observed address manager: %s", err)
 	}
@@ -272,8 +276,10 @@ func (ids *IDService) loop() {
 
 // Close shuts down the IDService
 func (ids *IDService) Close() error {
-	ids.ctxCancel()
-	ids.refCount.Wait()
+	ids.closeSync.Do(func() {
+		ids.ctxCancel()
+		ids.refCount.Wait()
+	})
 	return nil
 }
 
diff --git a/p2p/protocol/identify/obsaddr.go b/p2p/protocol/identify/obsaddr.go
index 5c241a68..ef6b118d 100644
--- a/p2p/protocol/identify/obsaddr.go
+++ b/p2p/protocol/identify/obsaddr.go
@@ -98,19 +98,13 @@ type newObservation struct {
 type ObservedAddrManager struct {
 	host host.Host
 
-	closeOnce sync.Once
-	refCount  sync.WaitGroup
-	ctx       context.Context // the context is canceled when Close is called
-	ctxCancel context.CancelFunc
-
 	// latest observation from active connections
 	// we'll "re-observe" these when we gc
 	activeConnsMu sync.Mutex
 	// active connection -> most recent observation
 	activeConns map[network.Conn]ma.Multiaddr
 
-	mu     sync.RWMutex
-	closed bool
+	mu sync.RWMutex
 	// local(internal) address -> list of observed(external) addresses
 	addrs        map[string][]*observedAddr
 	ttl          time.Duration
@@ -129,7 +123,7 @@ type ObservedAddrManager struct {
 
 // NewObservedAddrManager returns a new address manager using
 // peerstore.OwnObservedAddressTTL as the TTL.
-func NewObservedAddrManager(host host.Host) (*ObservedAddrManager, error) {
+func NewObservedAddrManager(ctx context.Context, host host.Host) (*ObservedAddrManager, error) {
 	oas := &ObservedAddrManager{
 		addrs:       make(map[string][]*observedAddr),
 		ttl:         peerstore.OwnObservedAddrTTL,
@@ -139,7 +133,6 @@ func NewObservedAddrManager(host host.Host) (*ObservedAddrManager, error) {
 		// refresh every ttl/2 so we don't forget observations from connected peers
 		refreshTimer: time.NewTimer(peerstore.OwnObservedAddrTTL / 2),
 	}
-	oas.ctx, oas.ctxCancel = context.WithCancel(context.Background())
 
 	reachabilitySub, err := host.EventBus().Subscribe(new(event.EvtLocalReachabilityChanged))
 	if err != nil {
@@ -154,8 +147,7 @@ func NewObservedAddrManager(host host.Host) (*ObservedAddrManager, error) {
 	oas.emitNATDeviceTypeChanged = emitter
 
 	oas.host.Network().Notify((*obsAddrNotifiee)(oas))
-	oas.refCount.Add(1)
-	go oas.worker()
+	go oas.worker(ctx)
 	return oas, nil
 }
 
@@ -247,12 +239,22 @@ func (oas *ObservedAddrManager) Record(conn network.Conn, observed ma.Multiaddr)
 	}
 }
 
-func (oas *ObservedAddrManager) worker() {
-	defer oas.refCount.Done()
+func (oas *ObservedAddrManager) teardown() {
+	oas.host.Network().StopNotify((*obsAddrNotifiee)(oas))
+	oas.reachabilitySub.Close()
+
+	oas.mu.Lock()
+	oas.refreshTimer.Stop()
+	oas.mu.Unlock()
+}
+
+func (oas *ObservedAddrManager) worker(ctx context.Context) {
+	defer oas.teardown()
 
 	ticker := time.NewTicker(GCInterval)
 	defer ticker.Stop()
 
+	hostClosing := oas.host.Network().Process().Closing()
 	subChan := oas.reachabilitySub.Out()
 	for {
 		select {
@@ -263,13 +265,17 @@ func (oas *ObservedAddrManager) worker() {
 			}
 			ev := evt.(event.EvtLocalReachabilityChanged)
 			oas.reachability = ev.Reachability
+
 		case obs := <-oas.wch:
 			oas.maybeRecordObservation(obs.conn, obs.observed)
+
 		case <-ticker.C:
 			oas.gc()
 		case <-oas.refreshTimer.C:
 			oas.refresh()
-		case <-oas.ctx.Done():
+		case <-hostClosing:
+			return
+		case <-ctx.Done():
 			return
 		}
 	}
@@ -528,22 +534,6 @@ func (oas *ObservedAddrManager) emitSpecificNATType(addrs []*observedAddr, proto
 	return false, 0
 }
 
-func (oas *ObservedAddrManager) Close() error {
-	oas.closeOnce.Do(func() {
-		oas.ctxCancel()
-
-		oas.mu.Lock()
-		oas.closed = true
-		oas.refreshTimer.Stop()
-		oas.mu.Unlock()
-
-		oas.refCount.Wait()
-		oas.reachabilitySub.Close()
-		oas.host.Network().StopNotify((*obsAddrNotifiee)(oas))
-	})
-	return nil
-}
-
 // observerGroup is a function that determines what part of
 // a multiaddr counts as a different observer. for example,
 // two ipfs nodes at the same IP/TCP transport would get
@@ -564,9 +554,6 @@ func observerGroup(m ma.Multiaddr) string {
 func (oas *ObservedAddrManager) SetTTL(ttl time.Duration) {
 	oas.mu.Lock()
 	defer oas.mu.Unlock()
-	if oas.closed {
-		return
-	}
 	oas.ttl = ttl
 	// refresh every ttl/2 so we don't forget observations from connected peers
 	oas.refreshTimer.Reset(ttl / 2)


Test patch:
diff --git a/p2p/host/basic/basic_host_test.go b/p2p/host/basic/basic_host_test.go
index 5cb21954..f09fed07 100644
--- a/p2p/host/basic/basic_host_test.go
+++ b/p2p/host/basic/basic_host_test.go
@@ -209,7 +209,7 @@ func TestHostAddrsFactory(t *testing.T) {
 		t.Fatalf("expected %s, got %s", maddr.String(), addrs[0].String())
 	}
 
-	autoNat, err := autonat.New(ctx, h, autonat.WithReachability(network.ReachabilityPublic))
+	autoNat, err := autonat.New(h, autonat.WithReachability(network.ReachabilityPublic))
 	if err != nil {
 		t.Fatalf("should be able to attach autonat: %v", err)
 	}
diff --git a/p2p/host/circuitv2/proto/voucher_test.go b/p2p/host/circuitv2/proto/voucher_test.go
deleted file mode 100644
index 148bd77a..00000000
--- a/p2p/host/circuitv2/proto/voucher_test.go
+++ /dev/null
@@ -1,68 +0,0 @@
-package proto
-
-import (
-	"testing"
-	"time"
-
-	"github.com/libp2p/go-libp2p-core/crypto"
-	"github.com/libp2p/go-libp2p-core/peer"
-	"github.com/libp2p/go-libp2p-core/record"
-)
-
-func TestReservationVoucher(t *testing.T) {
-	relayPrivk, relayPubk, err := crypto.GenerateKeyPair(crypto.Ed25519, 0)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	_, peerPubk, err := crypto.GenerateKeyPair(crypto.Ed25519, 0)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	relayID, err := peer.IDFromPublicKey(relayPubk)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	peerID, err := peer.IDFromPublicKey(peerPubk)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	rsvp := &ReservationVoucher{
-		Relay:      relayID,
-		Peer:       peerID,
-		Expiration: time.Now().Add(time.Hour),
-	}
-
-	envelope, err := record.Seal(rsvp, relayPrivk)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	blob, err := envelope.Marshal()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	_, rec, err := record.ConsumeEnvelope(blob, RecordDomain)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	rsvp2, ok := rec.(*ReservationVoucher)
-	if !ok {
-		t.Fatalf("invalid record type %+T", rec)
-	}
-
-	if rsvp.Relay != rsvp2.Relay {
-		t.Fatal("relay IDs don't match")
-	}
-	if rsvp.Peer != rsvp2.Peer {
-		t.Fatal("peer IDs don't match")
-	}
-	if rsvp.Expiration.Unix() != rsvp2.Expiration.Unix() {
-		t.Fatal("expirations don't match")
-	}
-}
diff --git a/p2p/host/circuitv2/relay/constraints_test.go b/p2p/host/circuitv2/relay/constraints_test.go
deleted file mode 100644
index 0eaaa680..00000000
--- a/p2p/host/circuitv2/relay/constraints_test.go
+++ /dev/null
@@ -1,142 +0,0 @@
-package relay
-
-import (
-	"crypto/rand"
-	"fmt"
-	"math"
-	"net"
-	"testing"
-	"time"
-
-	"github.com/libp2p/go-libp2p-core/test"
-	ma "github.com/multiformats/go-multiaddr"
-)
-
-func randomIPv4Addr(t *testing.T) ma.Multiaddr {
-	t.Helper()
-	b := make([]byte, 4)
-	rand.Read(b)
-	addr, err := ma.NewMultiaddr(fmt.Sprintf("/ip4/%s/tcp/1234", net.IP(b)))
-	if err != nil {
-		t.Fatal(err)
-	}
-	return addr
-}
-
-func TestConstraints(t *testing.T) {
-	infResources := func() *Resources {
-		return &Resources{
-			MaxReservations:        math.MaxInt32,
-			MaxReservationsPerPeer: math.MaxInt32,
-			MaxReservationsPerIP:   math.MaxInt32,
-			MaxReservationsPerASN:  math.MaxInt32,
-		}
-	}
-	const limit = 7
-
-	t.Run("total reservations", func(t *testing.T) {
-		res := infResources()
-		res.MaxReservations = limit
-		c := newConstraints(res)
-		for i := 0; i < limit; i++ {
-			if err := c.AddReservation(test.RandPeerIDFatal(t), randomIPv4Addr(t)); err != nil {
-				t.Fatal(err)
-			}
-		}
-		if err := c.AddReservation(test.RandPeerIDFatal(t), randomIPv4Addr(t)); err != errTooManyReservations {
-			t.Fatalf("expected to run into total reservation limit, got %v", err)
-		}
-	})
-
-	t.Run("reservations per peer", func(t *testing.T) {
-		p := test.RandPeerIDFatal(t)
-		res := infResources()
-		res.MaxReservationsPerPeer = limit
-		c := newConstraints(res)
-		for i := 0; i < limit; i++ {
-			if err := c.AddReservation(p, randomIPv4Addr(t)); err != nil {
-				t.Fatal(err)
-			}
-		}
-		if err := c.AddReservation(p, randomIPv4Addr(t)); err != errTooManyReservationsForPeer {
-			t.Fatalf("expected to run into total reservation limit, got %v", err)
-		}
-		if err := c.AddReservation(test.RandPeerIDFatal(t), randomIPv4Addr(t)); err != nil {
-			t.Fatalf("expected reservation for different peer to be possible, got %v", err)
-		}
-	})
-
-	t.Run("reservations per IP", func(t *testing.T) {
-		ip := randomIPv4Addr(t)
-		res := infResources()
-		res.MaxReservationsPerIP = limit
-		c := newConstraints(res)
-		for i := 0; i < limit; i++ {
-			if err := c.AddReservation(test.RandPeerIDFatal(t), ip); err != nil {
-				t.Fatal(err)
-			}
-		}
-		if err := c.AddReservation(test.RandPeerIDFatal(t), ip); err != errTooManyReservationsForIP {
-			t.Fatalf("expected to run into total reservation limit, got %v", err)
-		}
-		if err := c.AddReservation(test.RandPeerIDFatal(t), randomIPv4Addr(t)); err != nil {
-			t.Fatalf("expected reservation for different IP to be possible, got %v", err)
-		}
-	})
-
-	t.Run("reservations per ASN", func(t *testing.T) {
-		getAddr := func(t *testing.T, ip net.IP) ma.Multiaddr {
-			t.Helper()
-			addr, err := ma.NewMultiaddr(fmt.Sprintf("/ip6/%s/tcp/1234", ip))
-			if err != nil {
-				t.Fatal(err)
-			}
-			return addr
-		}
-
-		res := infResources()
-		res.MaxReservationsPerASN = limit
-		c := newConstraints(res)
-		const ipv6Prefix = "2a03:2880:f003:c07:face:b00c::"
-		for i := 0; i < limit; i++ {
-			addr := getAddr(t, net.ParseIP(fmt.Sprintf("%s%d", ipv6Prefix, i+1)))
-			if err := c.AddReservation(test.RandPeerIDFatal(t), addr); err != nil {
-				t.Fatal(err)
-			}
-		}
-		if err := c.AddReservation(test.RandPeerIDFatal(t), getAddr(t, net.ParseIP(fmt.Sprintf("%s%d", ipv6Prefix, 42)))); err != errTooManyReservationsForASN {
-			t.Fatalf("expected to run into total reservation limit, got %v", err)
-		}
-		if err := c.AddReservation(test.RandPeerIDFatal(t), randomIPv4Addr(t)); err != nil {
-			t.Fatalf("expected reservation for different IP to be possible, got %v", err)
-		}
-	})
-}
-
-func TestConstraintsCleanup(t *testing.T) {
-	origValidity := validity
-	defer func() { validity = origValidity }()
-	validity = 500 * time.Millisecond
-
-	const limit = 7
-	res := &Resources{
-		MaxReservations:        limit,
-		MaxReservationsPerPeer: math.MaxInt32,
-		MaxReservationsPerIP:   math.MaxInt32,
-		MaxReservationsPerASN:  math.MaxInt32,
-	}
-	c := newConstraints(res)
-	for i := 0; i < limit; i++ {
-		if err := c.AddReservation(test.RandPeerIDFatal(t), randomIPv4Addr(t)); err != nil {
-			t.Fatal(err)
-		}
-	}
-	if err := c.AddReservation(test.RandPeerIDFatal(t), randomIPv4Addr(t)); err != errTooManyReservations {
-		t.Fatalf("expected to run into total reservation limit, got %v", err)
-	}
-
-	time.Sleep(validity + time.Millisecond)
-	if err := c.AddReservation(test.RandPeerIDFatal(t), randomIPv4Addr(t)); err != nil {
-		t.Fatalf("expected old reservations to have been garbage collected, %v", err)
-	}
-}
diff --git a/p2p/host/circuitv2/test/compat_test.go b/p2p/host/circuitv2/test/compat_test.go
deleted file mode 100644
index bcecba02..00000000
--- a/p2p/host/circuitv2/test/compat_test.go
+++ /dev/null
@@ -1,177 +0,0 @@
-package test
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-	"testing"
-
-	v1 "github.com/libp2p/go-libp2p-circuit"
-
-	"github.com/libp2p/go-libp2p-core/host"
-	"github.com/libp2p/go-libp2p-core/network"
-	"github.com/libp2p/go-libp2p-core/peer"
-
-	tptu "github.com/libp2p/go-libp2p-transport-upgrader"
-	ma "github.com/multiformats/go-multiaddr"
-)
-
-func addTransportV1(t *testing.T, ctx context.Context, h host.Host, upgrader *tptu.Upgrader) {
-	err := v1.AddRelayTransport(ctx, h, upgrader)
-	if err != nil {
-		t.Fatal(err)
-	}
-}
-
-func TestRelayCompatV2DialV1(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-
-	hosts, upgraders := getNetHosts(t, ctx, 3)
-	addTransportV1(t, ctx, hosts[0], upgraders[0])
-	addTransport(t, ctx, hosts[2], upgraders[2])
-
-	rch := make(chan []byte, 1)
-	hosts[0].SetStreamHandler("test", func(s network.Stream) {
-		defer s.Close()
-		defer close(rch)
-
-		buf := make([]byte, 1024)
-		nread := 0
-		for nread < len(buf) {
-			n, err := s.Read(buf[nread:])
-			nread += n
-			if err != nil {
-				if err == io.EOF {
-					break
-				}
-				t.Fatal(err)
-			}
-		}
-
-		rch <- buf[:nread]
-	})
-
-	_, err := v1.NewRelay(ctx, hosts[1], upgraders[1], v1.OptHop)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	connect(t, hosts[0], hosts[1])
-	connect(t, hosts[1], hosts[2])
-
-	raddr, err := ma.NewMultiaddr(fmt.Sprintf("/p2p/%s/p2p-circuit/p2p/%s", hosts[1].ID(), hosts[0].ID()))
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = hosts[2].Connect(ctx, peer.AddrInfo{ID: hosts[0].ID(), Addrs: []ma.Multiaddr{raddr}})
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	conns := hosts[2].Network().ConnsToPeer(hosts[0].ID())
-	if len(conns) != 1 {
-		t.Fatalf("expected 1 connection, but got %d", len(conns))
-	}
-	if conns[0].Stat().Transient {
-		t.Fatal("expected non transient connection")
-	}
-
-	s, err := hosts[2].NewStream(ctx, hosts[0].ID(), "test")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	msg := []byte("relay works!")
-	nwritten, err := s.Write(msg)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if nwritten != len(msg) {
-		t.Fatalf("expected to write %d bytes, but wrote %d instead", len(msg), nwritten)
-	}
-	s.CloseWrite()
-
-	got := <-rch
-	if !bytes.Equal(msg, got) {
-		t.Fatalf("Wrong echo; expected %s but got %s", string(msg), string(got))
-	}
-}
-
-func TestRelayCompatV1DialV2(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-
-	hosts, upgraders := getNetHosts(t, ctx, 3)
-	addTransport(t, ctx, hosts[0], upgraders[0])
-	addTransportV1(t, ctx, hosts[2], upgraders[2])
-
-	rch := make(chan []byte, 1)
-	hosts[0].SetStreamHandler("test", func(s network.Stream) {
-		defer s.Close()
-		defer close(rch)
-
-		buf := make([]byte, 1024)
-		nread := 0
-		for nread < len(buf) {
-			n, err := s.Read(buf[nread:])
-			nread += n
-			if err != nil {
-				if err == io.EOF {
-					break
-				}
-				t.Fatal(err)
-			}
-		}
-
-		rch <- buf[:nread]
-	})
-
-	_, err := v1.NewRelay(ctx, hosts[1], upgraders[1], v1.OptHop)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	connect(t, hosts[0], hosts[1])
-	connect(t, hosts[1], hosts[2])
-
-	raddr, err := ma.NewMultiaddr(fmt.Sprintf("/p2p/%s/p2p-circuit/p2p/%s", hosts[1].ID(), hosts[0].ID()))
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = hosts[2].Connect(ctx, peer.AddrInfo{ID: hosts[0].ID(), Addrs: []ma.Multiaddr{raddr}})
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	conns := hosts[2].Network().ConnsToPeer(hosts[0].ID())
-	if len(conns) != 1 {
-		t.Fatalf("expected 1 connection, but got %d", len(conns))
-	}
-	if conns[0].Stat().Transient {
-		t.Fatal("expected non transient connection")
-	}
-
-	s, err := hosts[2].NewStream(ctx, hosts[0].ID(), "test")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	msg := []byte("relay works!")
-	nwritten, err := s.Write(msg)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if nwritten != len(msg) {
-		t.Fatalf("expected to write %d bytes, but wrote %d instead", len(msg), nwritten)
-	}
-	s.CloseWrite()
-
-	got := <-rch
-	if !bytes.Equal(msg, got) {
-		t.Fatalf("Wrong echo; expected %s but got %s", string(msg), string(got))
-	}
-}
diff --git a/p2p/host/circuitv2/test/e2e_test.go b/p2p/host/circuitv2/test/e2e_test.go
deleted file mode 100644
index b822f913..00000000
--- a/p2p/host/circuitv2/test/e2e_test.go
+++ /dev/null
@@ -1,361 +0,0 @@
-package test
-
-import (
-	"bytes"
-	"context"
-	"fmt"
-	"io"
-	"math/rand"
-	"testing"
-	"time"
-
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/client"
-	"github.com/libp2p/go-libp2p/p2p/host/circuitv2/relay"
-
-	"github.com/libp2p/go-libp2p-core/crypto"
-	"github.com/libp2p/go-libp2p-core/host"
-	"github.com/libp2p/go-libp2p-core/mux"
-	"github.com/libp2p/go-libp2p-core/network"
-	"github.com/libp2p/go-libp2p-core/peer"
-
-	logging "github.com/ipfs/go-log"
-	bhost "github.com/libp2p/go-libp2p-blankhost"
-	metrics "github.com/libp2p/go-libp2p-core/metrics"
-	pstoremem "github.com/libp2p/go-libp2p-peerstore/pstoremem"
-	swarm "github.com/libp2p/go-libp2p-swarm"
-	swarmt "github.com/libp2p/go-libp2p-swarm/testing"
-	tptu "github.com/libp2p/go-libp2p-transport-upgrader"
-	tcp "github.com/libp2p/go-tcp-transport"
-	ma "github.com/multiformats/go-multiaddr"
-)
-
-func init() {
-	// TODO temporary for debugging purposes; to be removed for merge.
-	logging.SetLogLevel("relay", "DEBUG")
-	logging.SetLogLevel("p2p-circuit", "DEBUG")
-}
-
-func getNetHosts(t *testing.T, ctx context.Context, n int) (hosts []host.Host, upgraders []*tptu.Upgrader) {
-	for i := 0; i < n; i++ {
-		privk, pubk, err := crypto.GenerateKeyPair(crypto.Ed25519, 0)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		p, err := peer.IDFromPublicKey(pubk)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		ps := pstoremem.NewPeerstore()
-		err = ps.AddPrivKey(p, privk)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		bwr := metrics.NewBandwidthCounter()
-		netw := swarm.NewSwarm(ctx, p, ps, bwr)
-
-		upgrader := swarmt.GenUpgrader(netw)
-		upgraders = append(upgraders, upgrader)
-
-		err = netw.AddTransport(tcp.NewTCPTransport(upgrader))
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		err = netw.Listen(ma.StringCast("/ip4/127.0.0.1/tcp/0"))
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		h := bhost.NewBlankHost(netw)
-
-		hosts = append(hosts, h)
-	}
-
-	return hosts, upgraders
-}
-
-func connect(t *testing.T, a, b host.Host) {
-	pi := peer.AddrInfo{ID: a.ID(), Addrs: a.Addrs()}
-	err := b.Connect(context.Background(), pi)
-	if err != nil {
-		t.Fatal(err)
-	}
-}
-
-func addTransport(t *testing.T, ctx context.Context, h host.Host, upgrader *tptu.Upgrader) {
-	err := client.AddTransport(ctx, h, upgrader)
-	if err != nil {
-		t.Fatal(err)
-	}
-}
-
-func TestBasicRelay(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-
-	hosts, upgraders := getNetHosts(t, ctx, 3)
-	addTransport(t, ctx, hosts[0], upgraders[0])
-	addTransport(t, ctx, hosts[2], upgraders[2])
-
-	rch := make(chan []byte, 1)
-	hosts[0].SetStreamHandler("test", func(s network.Stream) {
-		defer s.Close()
-		defer close(rch)
-
-		buf := make([]byte, 1024)
-		nread := 0
-		for nread < len(buf) {
-			n, err := s.Read(buf[nread:])
-			nread += n
-			if err != nil {
-				if err == io.EOF {
-					break
-				}
-				t.Fatal(err)
-			}
-		}
-
-		rch <- buf[:nread]
-	})
-
-	r, err := relay.New(hosts[1])
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer r.Close()
-
-	connect(t, hosts[0], hosts[1])
-	connect(t, hosts[1], hosts[2])
-
-	rinfo := hosts[1].Peerstore().PeerInfo(hosts[1].ID())
-	rsvp, err := client.Reserve(ctx, hosts[0], rinfo)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if rsvp.Voucher == nil {
-		t.Fatal("no reservation voucher")
-	}
-
-	raddr, err := ma.NewMultiaddr(fmt.Sprintf("/p2p/%s/p2p-circuit/p2p/%s", hosts[1].ID(), hosts[0].ID()))
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = hosts[2].Connect(ctx, peer.AddrInfo{ID: hosts[0].ID(), Addrs: []ma.Multiaddr{raddr}})
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	conns := hosts[2].Network().ConnsToPeer(hosts[0].ID())
-	if len(conns) != 1 {
-		t.Fatalf("expected 1 connection, but got %d", len(conns))
-	}
-	if !conns[0].Stat().Transient {
-		t.Fatal("expected transient connection")
-	}
-
-	s, err := hosts[2].NewStream(network.WithUseTransient(ctx, "test"), hosts[0].ID(), "test")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	msg := []byte("relay works!")
-	nwritten, err := s.Write(msg)
-	if err != nil {
-		t.Fatal(err)
-	}
-	if nwritten != len(msg) {
-		t.Fatalf("expected to write %d bytes, but wrote %d instead", len(msg), nwritten)
-	}
-	s.CloseWrite()
-
-	got := <-rch
-	if !bytes.Equal(msg, got) {
-		t.Fatalf("Wrong echo; expected %s but got %s", string(msg), string(got))
-	}
-}
-
-func TestRelayLimitTime(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-
-	hosts, upgraders := getNetHosts(t, ctx, 3)
-	addTransport(t, ctx, hosts[0], upgraders[0])
-	addTransport(t, ctx, hosts[2], upgraders[2])
-
-	rch := make(chan error, 1)
-	hosts[0].SetStreamHandler("test", func(s network.Stream) {
-		defer s.Close()
-		defer close(rch)
-
-		buf := make([]byte, 1024)
-		_, err := s.Read(buf)
-		rch <- err
-	})
-
-	rc := relay.DefaultResources()
-	rc.Limit.Duration = time.Second
-
-	r, err := relay.New(hosts[1], relay.WithResources(rc))
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer r.Close()
-
-	connect(t, hosts[0], hosts[1])
-	connect(t, hosts[1], hosts[2])
-
-	rinfo := hosts[1].Peerstore().PeerInfo(hosts[1].ID())
-	_, err = client.Reserve(ctx, hosts[0], rinfo)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	raddr, err := ma.NewMultiaddr(fmt.Sprintf("/p2p/%s/p2p-circuit/p2p/%s", hosts[1].ID(), hosts[0].ID()))
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = hosts[2].Connect(ctx, peer.AddrInfo{ID: hosts[0].ID(), Addrs: []ma.Multiaddr{raddr}})
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	conns := hosts[2].Network().ConnsToPeer(hosts[0].ID())
-	if len(conns) != 1 {
-		t.Fatalf("expected 1 connection, but got %d", len(conns))
-	}
-	if !conns[0].Stat().Transient {
-		t.Fatal("expected transient connection")
-	}
-
-	s, err := hosts[2].NewStream(network.WithUseTransient(ctx, "test"), hosts[0].ID(), "test")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	time.Sleep(2 * time.Second)
-	n, err := s.Write([]byte("should be closed"))
-	if n > 0 {
-		t.Fatalf("expected to write 0 bytes, wrote %d", n)
-	}
-	if err != mux.ErrReset {
-		t.Fatalf("expected reset, but got %s", err)
-	}
-
-	err = <-rch
-	if err != mux.ErrReset {
-		t.Fatalf("expected reset, but got %s", err)
-	}
-}
-
-func TestRelayLimitData(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
-	defer cancel()
-
-	hosts, upgraders := getNetHosts(t, ctx, 3)
-	addTransport(t, ctx, hosts[0], upgraders[0])
-	addTransport(t, ctx, hosts[2], upgraders[2])
-
-	rch := make(chan int, 1)
-	hosts[0].SetStreamHandler("test", func(s network.Stream) {
-		defer s.Close()
-		defer close(rch)
-
-		buf := make([]byte, 1024)
-		for i := 0; i < 3; i++ {
-			n, err := s.Read(buf)
-			if err != nil {
-				t.Fatal(err)
-			}
-			rch <- n
-		}
-
-		n, err := s.Read(buf)
-		if err != mux.ErrReset {
-			t.Fatalf("expected reset but got %s", err)
-		}
-		rch <- n
-	})
-
-	rc := relay.DefaultResources()
-	rc.Limit.Duration = time.Second
-	rc.Limit.Data = 4096
-
-	r, err := relay.New(hosts[1], relay.WithResources(rc))
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer r.Close()
-
-	connect(t, hosts[0], hosts[1])
-	connect(t, hosts[1], hosts[2])
-
-	rinfo := hosts[1].Peerstore().PeerInfo(hosts[1].ID())
-	_, err = client.Reserve(ctx, hosts[0], rinfo)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	raddr, err := ma.NewMultiaddr(fmt.Sprintf("/p2p/%s/p2p-circuit/p2p/%s", hosts[1].ID(), hosts[0].ID()))
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	err = hosts[2].Connect(ctx, peer.AddrInfo{ID: hosts[0].ID(), Addrs: []ma.Multiaddr{raddr}})
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	conns := hosts[2].Network().ConnsToPeer(hosts[0].ID())
-	if len(conns) != 1 {
-		t.Fatalf("expected 1 connection, but got %d", len(conns))
-	}
-	if !conns[0].Stat().Transient {
-		t.Fatal("expected transient connection")
-	}
-
-	s, err := hosts[2].NewStream(network.WithUseTransient(ctx, "test"), hosts[0].ID(), "test")
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	buf := make([]byte, 1024)
-	for i := 0; i < 3; i++ {
-		_, err = rand.Read(buf)
-		if err != nil {
-			t.Fatal(err)
-		}
-
-		n, err := s.Write(buf)
-		if err != nil {
-			t.Fatal(err)
-		}
-		if n != len(buf) {
-			t.Fatalf("expected to write %d bytes but wrote %d", len(buf), n)
-		}
-
-		n = <-rch
-		if n != len(buf) {
-			t.Fatalf("expected to read %d bytes but read %d", len(buf), n)
-		}
-	}
-
-	buf = make([]byte, 4096)
-	_, err = rand.Read(buf)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	s.Write(buf)
-
-	n := <-rch
-	if n != 0 {
-		t.Fatalf("expected to read 0 bytes but read %d", n)
-	}
-
-}
diff --git a/p2p/host/circuitv2/test/empty.go b/p2p/host/circuitv2/test/empty.go
deleted file mode 100644
index 56e54040..00000000
--- a/p2p/host/circuitv2/test/empty.go
+++ /dev/null
@@ -1,1 +0,0 @@
-package test
diff --git a/p2p/host/relay/autorelay_test.go b/p2p/host/relay/autorelay_test.go
index 1b466245..17a0d462 100644
--- a/p2p/host/relay/autorelay_test.go
+++ b/p2p/host/relay/autorelay_test.go
@@ -8,17 +8,17 @@ import (
 	"testing"
 	"time"
 
-	"github.com/libp2p/go-libp2p"
-	"github.com/libp2p/go-libp2p/p2p/host/relay"
+	cienv "github.com/jbenet/go-cienv"
+	libp2p "github.com/libp2p/go-libp2p"
+	relay "github.com/libp2p/go-libp2p/p2p/host/relay"
 
+	cid "github.com/ipfs/go-cid"
 	circuit "github.com/libp2p/go-libp2p-circuit"
 	"github.com/libp2p/go-libp2p-core/event"
 	"github.com/libp2p/go-libp2p-core/host"
 	"github.com/libp2p/go-libp2p-core/network"
 	"github.com/libp2p/go-libp2p-core/peer"
 	"github.com/libp2p/go-libp2p-core/routing"
-
-	"github.com/ipfs/go-cid"
 	ma "github.com/multiformats/go-multiaddr"
 	manet "github.com/multiformats/go-multiaddr/net"
 )
@@ -114,6 +114,10 @@ func connect(t *testing.T, a, b host.Host) {
 
 // and the actual test!
 func TestAutoRelay(t *testing.T) {
+	if cienv.IsRunning() {
+		t.Skip("disabled on CI: fails 99% of the time")
+	}
+
 	manet.Private4 = []*net.IPNet{}
 
 	ctx, cancel := context.WithCancel(context.Background())
diff --git a/p2p/protocol/holepunch/coordination_test.go b/p2p/protocol/holepunch/coordination_test.go
new file mode 100644
index 00000000..8b332063
--- /dev/null
+++ b/p2p/protocol/holepunch/coordination_test.go
@@ -0,0 +1,373 @@
+package holepunch_test
+
+import (
+	"context"
+	"net"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/libp2p/go-libp2p"
+	circuit "github.com/libp2p/go-libp2p-circuit"
+	"github.com/libp2p/go-libp2p-core/host"
+	"github.com/libp2p/go-libp2p-core/network"
+	"github.com/libp2p/go-libp2p-core/peer"
+	"github.com/libp2p/go-libp2p-core/peerstore"
+	"github.com/libp2p/go-libp2p-testing/race"
+	"github.com/libp2p/go-libp2p/p2p/protocol/holepunch"
+	holepunch_pb "github.com/libp2p/go-libp2p/p2p/protocol/holepunch/pb"
+	"github.com/libp2p/go-libp2p/p2p/protocol/identify"
+	"github.com/libp2p/go-msgio/protoio"
+
+	ma "github.com/multiformats/go-multiaddr"
+	manet "github.com/multiformats/go-multiaddr/net"
+
+	"github.com/stretchr/testify/require"
+)
+
+type mockEventTracer struct {
+	mutex  sync.Mutex
+	events []*holepunch.Event
+}
+
+func (m *mockEventTracer) Trace(evt *holepunch.Event) {
+	m.mutex.Lock()
+	m.events = append(m.events, evt)
+	m.mutex.Unlock()
+}
+
+func (m *mockEventTracer) getEvents() []*holepunch.Event {
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+	// copy the slice
+	return append([]*holepunch.Event{}, m.events...)
+}
+
+var _ holepunch.EventTracer = &mockEventTracer{}
+
+func TestNoHolePunchIfDirectConnExists(t *testing.T) {
+	tr := &mockEventTracer{}
+	h1, hps := mkHostWithHolePunchSvc(t, holepunch.WithTracer(tr))
+	defer h1.Close()
+	h2, _ := mkHostWithHolePunchSvc(t)
+	defer h2.Close()
+	require.NoError(t, h1.Connect(context.Background(), peer.AddrInfo{
+		ID:    h2.ID(),
+		Addrs: h2.Addrs(),
+	}))
+	time.Sleep(50 * time.Millisecond)
+	nc1 := len(h1.Network().ConnsToPeer(h2.ID()))
+	require.GreaterOrEqual(t, nc1, 1)
+	nc2 := len(h2.Network().ConnsToPeer(h1.ID()))
+	require.GreaterOrEqual(t, nc2, 1)
+
+	require.NoError(t, hps.DirectConnect(h2.ID()))
+	require.Equal(t, len(h1.Network().ConnsToPeer(h2.ID())), nc1)
+	require.Equal(t, len(h2.Network().ConnsToPeer(h1.ID())), nc2)
+	require.Empty(t, tr.getEvents())
+}
+
+func TestDirectDialWorks(t *testing.T) {
+	// mark all addresses as public
+	cpy := manet.Private4
+	manet.Private4 = []*net.IPNet{}
+	defer func() { manet.Private4 = cpy }()
+
+	tr := &mockEventTracer{}
+	h1, h1ps := mkHostWithHolePunchSvc(t, holepunch.WithTracer(tr))
+	defer h1.Close()
+	h2, _ := mkHostWithHolePunchSvc(t)
+	defer h2.Close()
+	h2.RemoveStreamHandler(holepunch.Protocol)
+	h1.Peerstore().AddAddrs(h2.ID(), h2.Addrs(), peerstore.ConnectedAddrTTL)
+
+	// try to hole punch without any connection and streams, if it works -> it's a direct connection
+	require.Len(t, h1.Network().ConnsToPeer(h2.ID()), 0)
+	require.NoError(t, h1ps.DirectConnect(h2.ID()))
+	require.GreaterOrEqual(t, len(h1.Network().ConnsToPeer(h2.ID())), 1)
+	require.GreaterOrEqual(t, len(h2.Network().ConnsToPeer(h1.ID())), 1)
+	events := tr.getEvents()
+	require.Len(t, events, 1)
+	require.Equal(t, events[0].Type, holepunch.DirectDialEvtT)
+}
+
+func TestEndToEndSimConnect(t *testing.T) {
+	tr := &mockEventTracer{}
+	h1, h2, relay, _ := makeRelayedHosts(t, holepunch.WithTracer(tr), true)
+	defer h1.Close()
+	defer h2.Close()
+	defer relay.Close()
+
+	// wait till a direct connection is complete
+	ensureDirectConn(t, h1, h2)
+	// ensure no hole-punching streams are open on either side
+	ensureNoHolePunchingStream(t, h1, h2)
+	events := tr.getEvents()
+	require.Len(t, events, 3)
+	require.Equal(t, events[0].Type, holepunch.StartHolePunchEvtT)
+	require.Equal(t, events[1].Type, holepunch.HolePunchAttemptEvtT)
+	require.Equal(t, events[2].Type, holepunch.EndHolePunchEvtT)
+}
+
+func TestFailuresOnInitiator(t *testing.T) {
+	tcs := map[string]struct {
+		rhandler         func(s network.Stream)
+		errMsg           string
+		holePunchTimeout time.Duration
+	}{
+		"responder does NOT send a CONNECT message": {
+			rhandler: func(s network.Stream) {
+				wr := protoio.NewDelimitedWriter(s)
+				wr.WriteMsg(&holepunch_pb.HolePunch{Type: holepunch_pb.HolePunch_SYNC.Enum()})
+			},
+			errMsg: "expect CONNECT message, got SYNC",
+		},
+		"responder does NOT support protocol": {
+			rhandler: nil,
+		},
+		"unable to READ CONNECT message from responder": {
+			rhandler: func(s network.Stream) {
+				s.Reset()
+			},
+			errMsg: "failed to read CONNECT message",
+		},
+		"responder does NOT reply within hole punch deadline": {
+			holePunchTimeout: 10 * time.Millisecond,
+			rhandler: func(s network.Stream) {
+				time.Sleep(5 * time.Second)
+			},
+			errMsg: "i/o deadline reached",
+		},
+	}
+
+	for name, tc := range tcs {
+		t.Run(name, func(t *testing.T) {
+			if tc.holePunchTimeout != 0 {
+				cpy := holepunch.StreamTimeout
+				holepunch.StreamTimeout = tc.holePunchTimeout
+				defer func() { holepunch.StreamTimeout = cpy }()
+			}
+
+			tr := &mockEventTracer{}
+			h1, h2, relay, _ := makeRelayedHosts(t, holepunch.WithTracer(tr), false)
+			defer h1.Close()
+			defer h2.Close()
+			defer relay.Close()
+			hps := addHolePunchService(t, h2)
+
+			if tc.rhandler != nil {
+				h1.SetStreamHandler(holepunch.Protocol, tc.rhandler)
+			} else {
+				h1.RemoveStreamHandler(holepunch.Protocol)
+			}
+
+			err := hps.DirectConnect(h1.ID())
+			require.Error(t, err)
+			if tc.errMsg != "" {
+				require.Contains(t, err.Error(), tc.errMsg)
+			}
+		})
+
+	}
+}
+
+func TestFailuresOnResponder(t *testing.T) {
+	tcs := map[string]struct {
+		initiator        func(s network.Stream)
+		errMsg           string
+		holePunchTimeout time.Duration
+	}{
+		"initiator does NOT send a CONNECT message": {
+			initiator: func(s network.Stream) {
+				protoio.NewDelimitedWriter(s).WriteMsg(&holepunch_pb.HolePunch{Type: holepunch_pb.HolePunch_SYNC.Enum()})
+			},
+			errMsg: "expected CONNECT message",
+		},
+		"initiator does NOT send a SYNC message after a Connect message": {
+			initiator: func(s network.Stream) {
+				w := protoio.NewDelimitedWriter(s)
+				w.WriteMsg(&holepunch_pb.HolePunch{Type: holepunch_pb.HolePunch_CONNECT.Enum()})
+				w.WriteMsg(&holepunch_pb.HolePunch{Type: holepunch_pb.HolePunch_CONNECT.Enum()})
+			},
+			errMsg: "expected SYNC message",
+		},
+		"initiator does NOT reply within hole punch deadline": {
+			holePunchTimeout: 10 * time.Millisecond,
+			initiator: func(s network.Stream) {
+				protoio.NewDelimitedWriter(s).WriteMsg(&holepunch_pb.HolePunch{Type: holepunch_pb.HolePunch_CONNECT.Enum()})
+				time.Sleep(10 * time.Second)
+			},
+			errMsg: "i/o deadline reached",
+		},
+	}
+
+	for name, tc := range tcs {
+		t.Run(name, func(t *testing.T) {
+			if tc.holePunchTimeout != 0 {
+				cpy := holepunch.StreamTimeout
+				holepunch.StreamTimeout = tc.holePunchTimeout
+				defer func() { holepunch.StreamTimeout = cpy }()
+			}
+
+			tr := &mockEventTracer{}
+			h1, h2, relay, _ := makeRelayedHosts(t, holepunch.WithTracer(tr), false)
+			defer h1.Close()
+			defer h2.Close()
+			defer relay.Close()
+
+			s, err := h2.NewStream(context.Background(), h1.ID(), holepunch.Protocol)
+			require.NoError(t, err)
+
+			go tc.initiator(s)
+
+			getTracerError := func(tr *mockEventTracer) []string {
+				var errs []string
+				events := tr.getEvents()
+				for _, ev := range events {
+					if errEv, ok := ev.Evt.(*holepunch.ProtocolErrorEvt); ok {
+						errs = append(errs, errEv.Error)
+					}
+				}
+				return errs
+			}
+
+			require.Eventually(t, func() bool { return len(getTracerError(tr)) > 0 }, 5*time.Second, 100*time.Millisecond)
+			errs := getTracerError(tr)
+			require.Len(t, errs, 1)
+			require.Contains(t, errs[0], tc.errMsg)
+		})
+
+	}
+}
+
+func ensureNoHolePunchingStream(t *testing.T, h1, h2 host.Host) {
+	require.Eventually(t, func() bool {
+		for _, c := range h1.Network().ConnsToPeer(h2.ID()) {
+			for _, s := range c.GetStreams() {
+				if s.ID() == string(holepunch.Protocol) {
+					return false
+				}
+			}
+		}
+		return true
+	}, 5*time.Second, 50*time.Millisecond)
+
+	require.Eventually(t, func() bool {
+		for _, c := range h2.Network().ConnsToPeer(h1.ID()) {
+			for _, s := range c.GetStreams() {
+				if s.ID() == string(holepunch.Protocol) {
+					return false
+				}
+			}
+		}
+		return true
+	}, 5*time.Second, 50*time.Millisecond)
+}
+
+func ensureDirectConn(t *testing.T, h1, h2 host.Host) {
+	require.Eventually(t, func() bool {
+		for _, c := range h1.Network().ConnsToPeer(h2.ID()) {
+			if _, err := c.RemoteMultiaddr().ValueForProtocol(ma.P_CIRCUIT); err != nil {
+				return true
+			}
+		}
+		return false
+	}, 5*time.Second, 50*time.Millisecond)
+
+	require.Eventually(t, func() bool {
+		for _, c := range h2.Network().ConnsToPeer(h1.ID()) {
+			if _, err := c.RemoteMultiaddr().ValueForProtocol(ma.P_CIRCUIT); err != nil {
+				return true
+			}
+		}
+		return false
+	}, 5*time.Second, 50*time.Millisecond)
+}
+
+func mkHostWithStaticAutoRelay(t *testing.T, ctx context.Context, relay host.Host) host.Host {
+	if race.WithRace() {
+		t.Skip("modifying manet.Private4 is racy")
+	}
+	pi := peer.AddrInfo{
+		ID:    relay.ID(),
+		Addrs: relay.Addrs(),
+	}
+
+	cpy := manet.Private4
+	manet.Private4 = []*net.IPNet{}
+	defer func() { manet.Private4 = cpy }()
+
+	h, err := libp2p.New(ctx,
+		libp2p.ListenAddrs(ma.StringCast("/ip4/127.0.0.1/tcp/0"), ma.StringCast("/ip6/::1/tcp/0")),
+		libp2p.EnableRelay(),
+		libp2p.EnableAutoRelay(),
+		libp2p.ForceReachabilityPrivate(),
+		libp2p.StaticRelays([]peer.AddrInfo{pi}),
+	)
+	require.NoError(t, err)
+
+	// wait till we have a relay addr
+	require.Eventually(t, func() bool {
+		for _, a := range h.Addrs() {
+			if _, err := a.ValueForProtocol(ma.P_CIRCUIT); err == nil {
+				return true
+			}
+		}
+		return false
+	}, 5*time.Second, 50*time.Millisecond)
+	return h
+}
+
+func makeRelayedHosts(t *testing.T, h1Opt holepunch.Option, addHolePuncher bool) (h1, h2, relay host.Host, hps *holepunch.Service) {
+	t.Helper()
+	h1, _ = mkHostWithHolePunchSvc(t, h1Opt)
+	var err error
+	relay, err = libp2p.New(context.Background(),
+		libp2p.ListenAddrs(ma.StringCast("/ip4/127.0.0.1/tcp/0"), ma.StringCast("/ip6/::1/tcp/0")),
+		libp2p.EnableRelay(circuit.OptHop),
+	)
+	require.NoError(t, err)
+	h2 = mkHostWithStaticAutoRelay(t, context.Background(), relay)
+	if addHolePuncher {
+		hps = addHolePunchService(t, h2)
+	}
+
+	// h1 has a relay addr
+	// h2 should connect to the relay addr
+	var raddr ma.Multiaddr
+	for _, a := range h2.Addrs() {
+		if _, err := a.ValueForProtocol(ma.P_CIRCUIT); err == nil {
+			raddr = a
+			break
+		}
+	}
+	require.NotEmpty(t, raddr)
+	require.NoError(t, h1.Connect(context.Background(), peer.AddrInfo{
+		ID:    h2.ID(),
+		Addrs: []ma.Multiaddr{raddr},
+	}))
+	return
+}
+
+func addHolePunchService(t *testing.T, h host.Host) *holepunch.Service {
+	t.Helper()
+	ids, err := identify.NewIDService(h)
+	require.NoError(t, err)
+	hps, err := holepunch.NewService(h, ids)
+	require.NoError(t, err)
+	return hps
+}
+
+func mkHostWithHolePunchSvc(t *testing.T, opts ...holepunch.Option) (host.Host, *holepunch.Service) {
+	t.Helper()
+	h, err := libp2p.New(
+		context.Background(),
+		libp2p.ListenAddrs(ma.StringCast("/ip4/127.0.0.1/tcp/0"), ma.StringCast("/ip6/::1/tcp/0")),
+	)
+	require.NoError(t, err)
+	ids, err := identify.NewIDService(h)
+	require.NoError(t, err)
+	hps, err := holepunch.NewService(h, ids, opts...)
+	require.NoError(t, err)
+	return h, hps
+}
diff --git a/p2p/protocol/identify/obsaddr_test.go b/p2p/protocol/identify/obsaddr_test.go
index 2ce04009..4b3d0aca 100644
--- a/p2p/protocol/identify/obsaddr_test.go
+++ b/p2p/protocol/identify/obsaddr_test.go
@@ -85,11 +85,18 @@ func (h *harness) observeInbound(observed ma.Multiaddr, observer peer.ID) networ
 func newHarness(ctx context.Context, t *testing.T) harness {
 	mn := mocknet.New(ctx)
 	sk, err := p2putil.RandTestBogusPrivateKey()
-	require.NoError(t, err)
+	if err != nil {
+		t.Fatal(err)
+	}
+
 	h, err := mn.AddPeer(sk, ma.StringCast("/ip4/127.0.0.1/tcp/10086"))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	oas, err := identify.NewObservedAddrManager(ctx, h)
 	require.NoError(t, err)
-	oas, err := identify.NewObservedAddrManager(h)
-	require.NoError(t, err)
+
 	return harness{
 		oas:     oas,
 		mocknet: mn,
@@ -135,7 +142,6 @@ func TestObsAddrSet(t *testing.T) {
 	defer cancel()
 
 	harness := newHarness(ctx, t)
-	defer harness.oas.Close()
 
 	if !addrsMatch(harness.oas.Addrs(), nil) {
 		t.Error("addrs should be empty")
@@ -237,7 +243,6 @@ func TestObservedAddrFiltering(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	harness := newHarness(ctx, t)
-	defer harness.oas.Close()
 	require.Empty(t, harness.oas.Addrs())
 
 	// IP4/TCP
@@ -339,7 +344,6 @@ func TestEmitNATDeviceTypeSymmetric(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	harness := newHarness(ctx, t)
-	defer harness.oas.Close()
 	require.Empty(t, harness.oas.Addrs())
 	emitter, err := harness.host.EventBus().Emitter(new(event.EvtLocalReachabilityChanged), eventbus.Stateful)
 	require.NoError(t, err)
@@ -386,7 +390,6 @@ func TestEmitNATDeviceTypeCone(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 	harness := newHarness(ctx, t)
-	defer harness.oas.Close()
 	require.Empty(t, harness.oas.Addrs())
 	emitter, err := harness.host.EventBus().Emitter(new(event.EvtLocalReachabilityChanged), eventbus.Stateful)
 	require.NoError(t, err)