add unixTimestamp()

packages/nostr/src/client/conn.ts

@@ -2,6 +2,7 @@ import { ProtocolError } from "../error"
 import { Filters, SubscriptionId } from "."
 import { RawEvent, SignedEvent } from "../event"
 import WebSocket from "ws"
+import { unixTimestamp } from "../util"
 
 /**
  * The connection to a relay. This is the lowest layer of the nostr protocol.
@@ -241,15 +242,10 @@ function serializeFilters(filters: Filters): RawFilters {
     kinds: filters.kinds?.map((kind) => kind),
     ["#e"]: filters.eventTags?.map((e) => e.toString()),
     ["#p"]: filters.pubkeyTags?.map((p) => p.toString()),
-    // TODO The Math.floor has been repeated too many times at this point, have a unix timestamp function in event.ts
     since:
-      filters.since !== undefined
-        ? Math.floor(filters.since.getTime() / 1000)
-        : undefined,
+      filters.since !== undefined ? unixTimestamp(filters.since) : undefined,
     until:
-      filters.until !== undefined
-        ? Math.floor(filters.until.getTime() / 1000)
-        : undefined,
+      filters.until !== undefined ? unixTimestamp(filters.until) : undefined,
     limit: filters.limit,
   }
 }

packages/nostr/src/event.ts

@@ -1,6 +1,7 @@
 import { ProtocolError } from "./error"
 import * as secp from "@noble/secp256k1"
 import { PublicKey, PrivateKey } from "./keypair"
+import { unixTimestamp } from "./util"
 
 // TODO This file is missing proper documentation
 // TODO Add remaining event types
@@ -76,8 +77,8 @@ export class EventId {
       const serializedTags = `[${tags
         .map((tag) => `[${tag.map((v) => `"${v}"`).join(",")}]`)
         .join(",")}]`
-      const serialized = `[0,"${event.pubkey}",${Math.floor(
-        event.createdAt.getTime() / 1000
+      const serialized = `[0,"${event.pubkey}",${unixTimestamp(
+        event.createdAt
       )},${event.kind},${serializedTags},"${content}"]`
       const hash = await secp.utils.sha256(
         Uint8Array.from(charCodes(serialized))
@@ -153,7 +154,7 @@ export class SignedEvent {
     return {
       id: id.toString(),
       pubkey: event.pubkey.toString(),
-      created_at: Math.floor(event.createdAt.getTime() / 1000),
+      created_at: unixTimestamp(event.createdAt),
       kind: event.kind,
       tags,
       content,

packages/nostr/src/util.ts

@@ -0,0 +1,6 @@
+/**
+ * Calculate the unix timestamp (seconds since epoch) of the `Date`.
+ */
+export function unixTimestamp(date: Date): number {
+  return Math.floor(date.getTime() / 1000)
+}