From c7558c267678e03ef6366ab55ffdc410301f3702 Mon Sep 17 00:00:00 2001
From: tobtoht <thotbot@protonmail.com>
Date: Fri, 2 Jul 2021 19:43:00 +0200
Subject: [PATCH] Trezor: can't create SpendProofs: missing spendkey

---
 src/dialog/TxProofDialog.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/dialog/TxProofDialog.cpp b/src/dialog/TxProofDialog.cpp
index 96c81ea6..05b43b14 100644
--- a/src/dialog/TxProofDialog.cpp
+++ b/src/dialog/TxProofDialog.cpp
@@ -75,6 +75,11 @@ void TxProofDialog::selectSpendProof() {
         return;
     }
 
+    if (m_ctx->wallet->isHwBacked()) {
+        this->showWarning("SpendProof creation is not supported on this hardware device.");
+        return;
+    }
+
     ui->frame_message->show();
     ui->label_summary->setText("This proof shows you created a transaction with the txid shown above.");
 }