Bring back some net context

packages/net/src/context.ts

@@ -0,0 +1,17 @@
+import {Repository} from "@welshman/relay"
+import {verifyEvent, TrustedEvent, SignedEvent} from "@welshman/util"
+import {Pool} from "./pool.js"
+
+export type NetContext = {
+  pool: Pool
+  repository: Repository
+  isEventValid: (event: TrustedEvent, url: string) => boolean
+  isEventDeleted: (event: TrustedEvent, url: string) => boolean
+}
+
+export const netContext: NetContext = {
+  pool: Pool.getSingleton(),
+  repository: Repository.getSingleton(),
+  isEventValid: (event, url) => Boolean(event.sig && verifyEvent(event as SignedEvent)),
+  isEventDeleted: (event, url) => netContext.repository.isDeleted(event),
+}