From fea4f2577b67730dc35625c4347d9ac9adc66340 Mon Sep 17 00:00:00 2001
From: Danish Arora <35004822+danisharora099@users.noreply.github.com>
Date: Thu, 1 Aug 2024 15:19:35 +0530
Subject: [PATCH] chore(message-hash): use `timestamp` in nanoseconds instead
 of milliseconds (#2094)

* chore: convert timestamp from miliseconds to nanoseconds

* chore: test against hash accounting for nanoseconds instead of milliseconds
the hash used was calculated using timestamp in milliseconds, instead of nanoseconds (not part of the RFC test vectors)Y
---
 packages/message-hash/src/index.spec.ts |  2 +-
 packages/message-hash/src/index.ts      | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/packages/message-hash/src/index.spec.ts b/packages/message-hash/src/index.spec.ts
index d8045be6b9..62846c6415 100644
--- a/packages/message-hash/src/index.spec.ts
+++ b/packages/message-hash/src/index.spec.ts
@@ -95,7 +95,7 @@ describe("RFC Test Vectors", () => {
 
   it("Waku message hash computation (message is IDecodedMessage)", () => {
     const expectedHash =
-      "bd81b27902ad51f49e8f73ff8db4a96994040c9421da88b7ee8ba07bd39070b2";
+      "3f11bc950dce0e3ffdcf205ae6414c01130bb5d9f20644869bff80407fa52c8f";
     const pubsubTopic = "/waku/2/default-waku/proto";
     const message: IDecodedMessage = {
       payload: new Uint8Array(),
diff --git a/packages/message-hash/src/index.ts b/packages/message-hash/src/index.ts
index 7cfd57a0dc..825143ca95 100644
--- a/packages/message-hash/src/index.ts
+++ b/packages/message-hash/src/index.ts
@@ -40,7 +40,15 @@ function tryConvertTimestampToBytes(
     return;
   }
 
-  return numberToBytes(timestamp.valueOf());
+  let bigIntTimestamp: bigint;
+
+  if (typeof timestamp === "bigint") {
+    bigIntTimestamp = timestamp;
+  } else {
+    bigIntTimestamp = BigInt(timestamp.valueOf()) * 1000000n;
+  }
+
+  return numberToBytes(bigIntTimestamp);
 }
 
 export function messageHashStr(