swarm: bootnode-mode, new bootnodes and no p2p package discovery (#18498)

(cherry picked from commit bbd120354a)

swarm/network/kademlia.go

@@ -279,7 +279,7 @@ func (k *Kademlia) SuggestPeer() (suggestedPeer *BzzAddr, saturationDepth int, c
 	return suggestedPeer, 0, false
 }
 
-// On inserts  the peer as a kademlia peer into the live peers
+// On inserts the peer as a kademlia peer into the live peers
 func (k *Kademlia) On(p *Peer) (uint8, bool) {
 	k.lock.Lock()
 	defer k.lock.Unlock()

swarm/network/protocol.go

@@ -67,6 +67,7 @@ type BzzConfig struct {
 	HiveParams   *HiveParams
 	NetworkID    uint64
 	LightNode    bool
+	BootnodeMode bool
 }
 
 // Bzz is the swarm protocol bundle
@@ -87,7 +88,7 @@ type Bzz struct {
 // * overlay driver
 // * peer store
 func NewBzz(config *BzzConfig, kad *Kademlia, store state.Store, streamerSpec *protocols.Spec, streamerRun func(*BzzPeer) error) *Bzz {
-	return &Bzz{
+	bzz := &Bzz{
 		Hive:         NewHive(config.HiveParams, kad, store),
 		NetworkID:    config.NetworkID,
 		LightNode:    config.LightNode,
@@ -96,6 +97,13 @@ func NewBzz(config *BzzConfig, kad *Kademlia, store state.Store, streamerSpec *p
 		streamerRun:  streamerRun,
 		streamerSpec: streamerSpec,
 	}
+
+	if config.BootnodeMode {
+		bzz.streamerRun = nil
+		bzz.streamerSpec = nil
+	}
+
+	return bzz
 }
 
 // UpdateLocalAddr updates underlayaddress of the running node

swarm/network/stream/delivery.go

@@ -255,8 +255,15 @@ func (d *Delivery) RequestFromPeers(ctx context.Context, req *network.Request) (
 				return true
 			}
 			sp = d.getPeer(id)
+			// sp is nil, when we encounter a peer that is not registered for delivery, i.e. doesn't support the `stream` protocol
 			if sp == nil {
-				//log.Warn("Delivery.RequestFromPeers: peer not found", "id", id)
+				return true
+			}
+			// nodes that do not provide stream protocol
+			// should not be requested, e.g. bootnodes
+			if !p.HasCap("stream") {
+				// TODO: if we have no errors, delete this if
+				log.Error("Delivery.RequestFromPeers: peer doesn't have stream cap. we should have returned at sp == nil")
 				return true
 			}
 			spID = &id

swarm/network/stream/delivery_test.go

@@ -285,7 +285,7 @@ func TestRequestFromPeers(t *testing.T) {
 	addr := network.RandomAddr()
 	to := network.NewKademlia(addr.OAddr, network.NewKadParams())
 	delivery := NewDelivery(to, nil)
-	protocolsPeer := protocols.NewPeer(p2p.NewPeer(dummyPeerID, "dummy", nil), nil, nil)
+	protocolsPeer := protocols.NewPeer(p2p.NewPeer(dummyPeerID, "dummy", []p2p.Cap{{Name: "stream"}}), nil, nil)
 	peer := network.NewPeer(&network.BzzPeer{
 		BzzAddr:   network.RandomAddr(),
 		LightNode: false,

swarm/network/stream/stream.go

@@ -516,6 +516,11 @@ func (r *Registry) requestPeerSubscriptions(kad *network.Kademlia, subs map[enod
 	// nil as base takes the node's base; we need to pass 255 as `EachConn` runs
 	// from deepest bins backwards
 	kad.EachConn(nil, 255, func(p *network.Peer, po int) bool {
+		// nodes that do not provide stream protocol
+		// should not be subscribed, e.g. bootnodes
+		if !p.HasCap("stream") {
+			return true
+		}
 		//if the peer's bin is shallower than the kademlia depth,
 		//only the peer's bin should be subscribed
 		if po < kadDepth {