Move deduplicateEvents to util

packages/util/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@welshman/util",
-  "version": "0.4.6",
+  "version": "0.4.7",
   "author": "hodlbod",
   "license": "MIT",
   "description": "A collection of nostr-related utilities.",

packages/util/src/Events.ts

@@ -1,7 +1,7 @@
 import {verifiedSymbol, verifyEvent as verifyEventPure} from "nostr-tools/pure"
 import {setNostrWasm, verifyEvent as verifyEventWasm} from "nostr-tools/wasm"
 import {initNostrWasm} from "nostr-wasm"
-import {mapVals, first, pick, now} from "@welshman/lib"
+import {mapVals, lte, first, pick, now} from "@welshman/lib"
 import {getReplyTags, getCommentTags, getReplyTagValues, getCommentTagValues} from "./Tags.js"
 import {getAddress, Address} from "./Address.js"
 import {
@@ -136,6 +136,20 @@ export const getIdOrAddress = (e: HashedEvent) => (isReplaceable(e) ? getAddress
 export const getIdAndAddress = (e: HashedEvent) =>
   isReplaceable(e) ? [e.id, getAddress(e)] : [e.id]
 
+export const deduplicateEvents = (events: TrustedEvent[]) => {
+  const eventsByKey = new Map<string, TrustedEvent>()
+
+  for (const event of events) {
+    const key = getIdOrAddress(event)
+
+    if (lte(eventsByKey.get(key)?.created_at, event.created_at)) {
+      eventsByKey.set(key, event)
+    }
+  }
+
+  return Array.from(eventsByKey.values())
+}
+
 export const isEphemeral = (e: EventTemplate) => isEphemeralKind(e.kind)
 
 export const isReplaceable = (e: EventTemplate) => isReplaceableKind(e.kind)