From 0b77c1a77f609502082810f13fa178d384d4b389 Mon Sep 17 00:00:00 2001
From: Nick Frostbutter <75431177+nickfrosty@users.noreply.github.com>
Date: Wed, 3 May 2023 12:31:41 -0400
Subject: [PATCH] fix: compression proof verification check (#504)

---
 .changeset/thirty-panthers-peel.md                           | 5 +++++
 .../plugins/nftModule/operations/transferCompressedNft.ts    | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/thirty-panthers-peel.md

diff --git a/.changeset/thirty-panthers-peel.md b/.changeset/thirty-panthers-peel.md
new file mode 100644
index 000000000..33f3668ed
--- /dev/null
+++ b/.changeset/thirty-panthers-peel.md
@@ -0,0 +1,5 @@
+---
+"@metaplex-foundation/js": patch
+---
+
+fix: compression proof verification check
diff --git a/packages/js/src/plugins/nftModule/operations/transferCompressedNft.ts b/packages/js/src/plugins/nftModule/operations/transferCompressedNft.ts
index 9010616a6..49bfff044 100644
--- a/packages/js/src/plugins/nftModule/operations/transferCompressedNft.ts
+++ b/packages/js/src/plugins/nftModule/operations/transferCompressedNft.ts
@@ -224,7 +224,7 @@ export const transferCompressedNftBuilder = (
 
   // check if the provided assetProof path is valid for the provided root
   if (
-    MerkleTree.verify(new PublicKey(compression.assetProof.root).toBuffer(), {
+    !MerkleTree.verify(new PublicKey(compression.assetProof.root).toBuffer(), {
       leafIndex: compression.data.leaf_id,
       leaf: new PublicKey(compression.assetProof.leaf).toBuffer(),
       root: new PublicKey(compression.assetProof.root).toBuffer(),