From 76dc547ee7b05864e7b1b6c55fc0301d47aa3a15 Mon Sep 17 00:00:00 2001
From: furszy <matiasfurszyfer@protonmail.com>
Date: Thu, 15 Dec 2022 10:19:23 -0300
Subject: [PATCH] gui: create tx, launch error dialog if backend throws
 runtime_error

only will ever happen if something unexpected happened.
---
 src/qt/walletmodel.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index ed0602594b7..b1bc78218ce 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -212,7 +212,7 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
         return AmountExceedsBalance;
     }
 
-    {
+    try {
         CAmount nFeeRequired = 0;
         int nChangePosRet = -1;
 
@@ -240,6 +240,11 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
         if (nFeeRequired > m_wallet->getDefaultMaxTxFee()) {
             return AbsurdFee;
         }
+    } catch (const std::runtime_error& err) {
+        // Something unexpected happened, instruct user to report this bug.
+        Q_EMIT message(tr("Send Coins"), QString::fromStdString(err.what()),
+                       CClientUIInterface::MSG_ERROR);
+        return TransactionCreationFailed;
     }
 
     return SendCoinsReturn(OK);