Add network state to backend (#123)

packages/backend/src/Node.ts

@@ -31,6 +31,7 @@ export default class Node {
 
   public readonly events = new EventEmitter() as EventEmitter & NodeEvents;
 
+  public networkState: Maybe<Types.NetworkState> = null;
   public location: Maybe<Location> = null;
   public lastMessage: Types.Timestamp;
   public config: string;
@@ -239,6 +240,7 @@ export default class Node {
 
   private onSystemInterval(message: SystemInterval) {
     const {
+      network_state,
       peers,
       txcount,
       cpu,
@@ -249,6 +251,10 @@ export default class Node {
       finalized_hash: finalizedHash
     } = message;
 
+    if (this.networkState !== network_state && network_state) {
+      this.networkState = network_state;
+    };
+
     if (this.peers !== peers || this.txcount !== txcount) {
       this.peers = peers;
       this.txcount = txcount;

packages/backend/src/message.ts

@@ -53,6 +53,7 @@ export interface SystemConnected {
 
 export interface SystemInterval extends BestBlock {
   msg: 'system.interval';
+  network_state: Maybe<Types.NetworkState>;
   txcount: Types.TransactionCount;
   peers: Types.PeerCount;
   memory: Maybe<Types.MemoryUse>;

packages/common/src/types.ts

@@ -24,6 +24,7 @@ export type MemoryUse = Opaque<number, 'MemoryUse'>;
 export type CPUUse = Opaque<number, 'CPUUse'>;
 export type BytesPerSecond = Opaque<number, 'BytesPerSecond'>;
 export type NetworkId = Opaque<string, 'NetworkId'>;
+export type NetworkState = Opaque<string, 'NetworkState'>;
 
 export type BlockDetails = [BlockNumber, BlockHash, Milliseconds, Timestamp, Maybe<PropagationTime>];
 export type NodeDetails = [NodeName, NodeImplementation, NodeVersion, Maybe<Address>, Maybe<NetworkId>];