extends hashmap

client/lib/patch-db.ts

@@ -4,7 +4,7 @@ import { Source } from './source/source'
 import { Store } from './store'
 import { DBCache, HashMap, Http } from './types'
 
-export class PatchDB<T> {
+export class PatchDB<T extends HashMap> {
   store: Store<T>
 
   constructor (
@@ -15,7 +15,7 @@ export class PatchDB<T> {
     this.store = new Store(this.http, this.initialCache)
   }
 
-  sync$ (): Observable<DBCache<HashMap>> {
+  sync$ (): Observable<DBCache<T>> {
     return merge(...this.sources.map(s => s.watch$(this.store)))
     .pipe(
       tap(update => this.store.update(update)),

client/lib/store.ts

@@ -8,8 +8,8 @@ export interface StashEntry {
   undo: Operation[]
 }
 
-export class Store<T> {
-  cache: DBCache<HashMap>
+export class Store<T extends HashMap> {
+  cache: DBCache<T>
   sequence$: BehaviorSubject<number>
   private watchedNodes: { [path: string]: BehaviorSubject<any> } = { }
   private stash = new BTree<number, StashEntry>()