refactor: add NetworkId() to node

interfaces/node.go

@@ -18,4 +18,5 @@ type Node interface {
 	Start() error
 	GetCachedStorageLocations(hash *encoding.Multihash, types []int) (map[string]StorageLocation, error)
 	AddStorageLocation(hash *encoding.Multihash, nodeId *encoding.NodeId, location StorageLocation, message []byte, config *config.NodeConfig) error
+	NetworkId() string
 }

interfaces/p2p.go

@@ -19,4 +19,5 @@ type P2PService interface {
 	ReadNodeScore(nodeId *encoding.NodeId) (NodeVotes, error)
 	GetNodeScore(nodeId *encoding.NodeId) (float64, error)
 	SortNodesByScore(nodes []*encoding.NodeId) ([]*encoding.NodeId, error)
+	SignMessageSimple(message []byte) ([]byte, error)
 }

node/node.go

@@ -27,6 +27,10 @@ type NodeImpl struct {
 	cacheBucket           *bolt.Bucket
 }
 
+func (n *NodeImpl) NetworkId() string {
+	return n.nodeConfig.P2P.Network
+}
+
 func (n *NodeImpl) Services() interfaces.Services {
 	return n.services
 }