fix typescript types everywhere, delete pool.js and refactor relay.js to use event listeners everywhere.

filter.ts

@@ -0,0 +1,43 @@
+import {Event} from './event'
+
+export type Filter = {
+  ids?: string[]
+  kinds?: number[]
+  authors?: string[]
+  since?: number
+  until?: number
+  [key: `#${string}`]: string[]
+}
+
+export function matchFilter(filter: Filter, event: Event & {id: string}) {
+  if (filter.ids && filter.ids.indexOf(event.id) === -1) return false
+  if (filter.kinds && filter.kinds.indexOf(event.kind) === -1) return false
+  if (filter.authors && filter.authors.indexOf(event.pubkey) === -1)
+    return false
+
+  for (let f in filter) {
+    if (f[0] === '#') {
+      let tagName = f.slice(1)
+      let values = filter[`#${tagName}`]
+      if (
+        values &&
+        !event.tags.find(
+          ([t, v]) => t === f.slice(1) && values.indexOf(v) !== -1
+        )
+      )
+        return false
+    }
+  }
+
+  if (filter.since && event.created_at < filter.since) return false
+  if (filter.until && event.created_at >= filter.until) return false
+
+  return true
+}
+
+export function matchFilters(filters: Filter[], event: Event & {id: string}) {
+  for (let i = 0; i < filters.length; i++) {
+    if (matchFilter(filters[i], event)) return true
+  }
+  return false
+}