Support for Noise machines in getPeers

machine.go

@@ -600,12 +600,15 @@ func (machine Machine) toNode(
 	}
 
 	var machineKey key.MachinePublic
+	if machine.MachineKey != "" {
+		// MachineKey is only used in the legacy protocol
 		err = machineKey.UnmarshalText(
 			[]byte(MachinePublicKeyEnsurePrefix(machine.MachineKey)),
 		)
 		if err != nil {
 			return nil, fmt.Errorf("failed to parse machine public key: %w", err)
 		}
+	}
 
 	var discoKey key.DiscoPublic
 	if machine.DiscoKey != "" {