fix: ignore peers with invalid multiaddrs (libp2p#1873)

Author: maschad

packages/libp2p/src/libp2p.ts

@@ -98,8 +98,19 @@ export class Libp2pNode<T extends ServiceMap = Record<string, unknown>> extends
 
     components.events.addEventListener('peer:update', evt => {
       // if there was no peer previously in the peer store this is a new peer
-      if (evt.detail.previous == null) {
-        this.safeDispatchEvent('peer:discovery', { detail: evt.detail.peer })
+      if (evt.detail.previous === null) {
+
+        if(evt.detail.peer.addresses.length === 0) {
+          throw new CodeError('peer must have at least one multiaddr', codes.ERR_INVALID_MULTIADDR)
+        }
+
+        const peerInfo: PeerInfo = {
+          id: evt.detail.peer.id,
+          multiaddrs: evt.detail.peer.addresses.map(a => a.multiaddr),
+          protocols: evt.detail.peer.protocols
+        }
+
+        this.safeDispatchEvent('peer:discovery', { detail: peerInfo})
       }
     })