From 6db95ce15e1c51422ca0494883210105c3e742ba Mon Sep 17 00:00:00 2001
From: yonada <fraserdscott@gmail.com>
Date: Wed, 3 Jan 2024 14:37:37 +0000
Subject: [PATCH] fix(store): onBeforeSpliceDynamicData receives the previous
 encoded lengths [M-01] (#2020)

---
 .changeset/rich-carpets-remember.md | 5 +++++
 packages/store/src/StoreCore.sol    | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/rich-carpets-remember.md

diff --git a/.changeset/rich-carpets-remember.md b/.changeset/rich-carpets-remember.md
new file mode 100644
index 0000000000..5ecc17e2ea
--- /dev/null
+++ b/.changeset/rich-carpets-remember.md
@@ -0,0 +1,5 @@
+---
+"@latticexyz/store": patch
+---
+
+Fixed `StoreCore` to pass `previousEncodedLengths` into `onBeforeSpliceDynamicData`.
diff --git a/packages/store/src/StoreCore.sol b/packages/store/src/StoreCore.sol
index 716d07b478..60e6e993c0 100644
--- a/packages/store/src/StoreCore.sol
+++ b/packages/store/src/StoreCore.sol
@@ -1021,7 +1021,7 @@ library StoreCoreInternal {
           dynamicFieldIndex: dynamicFieldIndex,
           startWithinField: startWithinField,
           deleteCount: deleteCount,
-          encodedLengths: updatedEncodedLengths,
+          encodedLengths: previousEncodedLengths,
           data: data
         });
       }