What the developer wrote
Authored by ww3512687
fix scan ui bug
What changed, and why it matters
This commit adds a small 100-millisecond delay before checking Zcash transactions when a special 'Cypherpunk' firmware build is active. The stated purpose is to fix a scan-related user-interface bug. There is no direct evidence in the commit that this is a security fix; it appears to be a UI timing workaround.
Treat as a routine UI fix unless additional vendor or researcher documentation confirms a security-relevant race condition or denial-of-service issue. If Zcash scanning reliability is critical, monitor for related follow-up commits or disclosures.
Security signals we found
UI timing workaround for Zcash transaction scanning in a specific firmware variant
No mention of security, vulnerability, exploit, or attacker in commit message or diff
No bounds checks, input validation, memory safety, cryptographic, or privilege changes visible
Evidence from the diff
The change introduces a conditional helper CheckNeedDelay() that returns true only for ViewType ZcashTx, and calls UserDelay(100) before invoking CheckUrResult() in ModelCheckTransaction(). The code is wrapped in #ifdef CYPHERPUNK_VERSION, so it only affects a specific build variant. The commit title and message say only ‘fix scan ui bug’. No security relevance, vulnerability details, or threat model are described.
Changed components
src/ui/gui_model/gui_model.cModelCheckTransaction()Zcash transaction scanning flow in CYPHERPUNK_VERSION buildsInspect captured patch +12 / −1
diff --git a/src/ui/gui_model/gui_model.c b/src/ui/gui_model/gui_model.c
index d952a2d..b9a5feb 100644
--- a/src/ui/gui_model/gui_model.c
+++ b/src/ui/gui_model/gui_model.c
@@ -1256,12 +1256,23 @@ static int32_t ModelCopySdCardOta(const void *inData, uint32_t inDataLen)
return SUCCESS_CODE;
}
-static PtrT_TransactionCheckResult g_checkResult = NULL;
+#ifdef CYPHERPUNK_VERSION
+static bool CheckNeedDelay(ViewType viewType)
+{
+ return viewType == ZcashTx;
+}
+#endif
+static PtrT_TransactionCheckResult g_checkResult = NULL;
static int32_t ModelCheckTransaction(const void *inData, uint32_t inDataLen)
{
GuiApiEmitSignal(SIG_SHOW_TRANSACTION_LOADING, NULL, 0);
ViewType viewType = *((ViewType *)inData);
+#ifdef CYPHERPUNK_VERSION
+ if (CheckNeedDelay(viewType)) {
+ UserDelay(100);
+ }
+#endif
g_checkResult = CheckUrResult(viewType);
if (g_checkResult != NULL && g_checkResult->error_code == 0) {
GuiApiEmitSignal(SIG_TRANSACTION_CHECK_PASS, NULL, 0);
Why this scored 11/100
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