v0.0.29 - Feather firmware: auto-approve sign_event and always return explicit JSON-RPC errors for unhandled/oversized requests

firmware/feather_s3_tft/main/secure_mem.c

@@ -0,0 +1,15 @@
+#include "secure_mem.h"
+
+void secure_memzero(void *ptr, size_t len)
+{
+    volatile unsigned char *p = (volatile unsigned char *)ptr;
+
+    if (p == 0) {
+        return;
+    }
+
+    while (len > 0) {
+        *p++ = 0;
+        len--;
+    }
+}