From ce37b736b7877800e9a21ab17e97604d452dada1 Mon Sep 17 00:00:00 2001
From: Sainan <63328889+Sainan@users.noreply.github.com>
Date: Tue, 29 Apr 2025 13:05:25 +0200
Subject: [PATCH] fix: weapon seed's low dword being sign extended JavaScript's
 semantics here are incredibly stupid, but basically if the initial DWORD's
 high WORD's MSB is true, the number would become negative after the shift
 left by 16. Then when ORing it with the highDword, the initial DWORD would be
 sign-extended to a QWORD, meaning the high DWORD would become all 1s,
 basically cancelling out the entire OR operation.

---
 src/services/serversideVendorsService.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/services/serversideVendorsService.ts b/src/services/serversideVendorsService.ts
index d594e79f..8b0c65c3 100644
--- a/src/services/serversideVendorsService.ts
+++ b/src/services/serversideVendorsService.ts
@@ -286,7 +286,7 @@ const generateVendorManifest = (vendorInfo: IGeneratableVendorInfo): IVendorMani
                 item.LocTagRandSeed = (rng.randomInt(0, 0xffff) << 16) | rng.randomInt(0, 0xffff);
                 if (vendorInfo.RandomSeedType == "VRST_WEAPON") {
                     const highDword = (rng.randomInt(0, 0xffff) << 16) | rng.randomInt(0, 0xffff);
-                    item.LocTagRandSeed = (BigInt(highDword) << 32n) | BigInt(item.LocTagRandSeed);
+                    item.LocTagRandSeed = (BigInt(highDword) << 32n) | (BigInt(item.LocTagRandSeed) & 0xffffffffn);
                 }
             }
             processed.ItemManifest.push(item);