From 78991c7e82bdc5a6c4a3f5ed74dc643e96b7c69f Mon Sep 17 00:00:00 2001
From: kennethloeffler <kenloef@gmail.com>
Date: Sun, 3 May 2026 15:11:20 -0700
Subject: [PATCH] Use lossy conversion for UInt64 decode in plugin

---
 plugin/http/init.lua | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/plugin/http/init.lua b/plugin/http/init.lua
index 106ebc45..c72c2066 100644
--- a/plugin/http/init.lua
+++ b/plugin/http/init.lua
@@ -14,6 +14,13 @@ local Http = {}
 Http.Error = HttpError
 Http.Response = HttpResponse
 
+-- Monkey patch msgpack.UInt64.new to lossily convert the low and high bits of the integer
+-- to a native Luau number. We should change the upstream decoder to emit a native
+-- integer, once those are live.
+function msgpack.UInt64.new(mostSignificantPart: number, leastSignificantPart: number): number
+	return mostSignificantPart * 2 ^ 32 + (leastSignificantPart % 2 ^ 32)
+end
+
 local function performRequest(requestParams)
 	local requestId = lastRequestId + 1
 	lastRequestId = requestId