Better is syncing API (#44)

* better is syncing

* wait 10s

* remove wait

src/service/BlockService.ts

@@ -1,6 +1,12 @@
 import { Block } from 'crust-sdk'
 import Endpoint from 'crust-sdk/api/common/Endpoint';
 
+class NewSystemHealth {
+    peers: number
+    isSyncing: boolean
+    shouldHavePeers: boolean
+}
+
 export default class BlockService {
 
     block: Block
@@ -13,12 +19,31 @@ export default class BlockService {
         return await this.block.head()
     }
 
+    sleep = (time : number) => {
+        return new Promise((resolve) => setTimeout(resolve, time));
+    }
+
     blockHash = async (blockNumber: number) => {
         return await this.block.blockHash(blockNumber)
     }
 
     systemHealth = async () => {
-        return await this.block.health()
+        let sh = await this.block.health()
+        let nsh = new NewSystemHealth
+        nsh.isSyncing = sh.isSyncing.isTrue
+        nsh.peers = sh.peers.toNumber()
+        nsh.shouldHavePeers = sh.shouldHavePeers.isTrue
+
+        if (!nsh.isSyncing) {
+            let h1 = await this.head()
+            await this.sleep(3000)
+            let h2 = await this.head()
+            if (h1.number.toNumber() + 1 < h2.number.toNumber()) {
+                nsh.isSyncing = true
+            } 
+        }
+
+        return nsh
     }
 
 }