From 1d78cee269c2a0668276e108ef65a3481daf1d73 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=E2=97=8ESIM=E2=97=8E?=
 <89115113+cosimo-rip@users.noreply.github.com>
Date: Mon, 20 Mar 2023 11:48:15 -0400
Subject: [PATCH] Fix signing failures with Phantom Wallet 23.3.3+

---
 src/lib/anchorUtils.ts | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/lib/anchorUtils.ts b/src/lib/anchorUtils.ts
index 645e2dd..d6741ce 100644
--- a/src/lib/anchorUtils.ts
+++ b/src/lib/anchorUtils.ts
@@ -44,14 +44,20 @@ export const customProviderFactory = (
     tx.feePayer = anchorWallet?.publicKey;
     tx.recentBlockhash = (await connection.getRecentBlockhash()).blockhash;
 
-    await anchorWallet?.signTransaction(tx);
+    let signedTx = await anchorWallet?.signTransaction(tx);
+    if (signedTx === undefined) {
+      return '';
+    }
+    
     signers
       .filter((s): s is Signer => s !== undefined)
       .forEach((kp) => {
-        tx.partialSign(kp);
+        if (signedTx) {
+          signedTx.partialSign(kp);
+        }
       });
 
-    const rawTx = tx.serialize();
+    const rawTx = signedTx.serialize();
     const signature = await connection.sendRawTransaction(rawTx);
 
     // Await for 30 seconds