#define for qr code content size

helpers/flipbip_file.c

@@ -28,6 +28,7 @@ const char* TEXT_QRFILE = "Filetype: QRCode\n"
 #define FILE_KLEN 256
 #define FILE_SLEN 512
 #define FILE_MAX_PATH_LEN 48
+#define FILE_MAX_QRFILE_CONTENT 90
 const char* FILE_HSTR = "fb01";
 const char* FILE_K1 = "fb0131d5cf688221c109163908ebe51debb46227c6cc8b37641910833222772a"
                       "baefe6d9ceb651842260e0d1e05e3b90d15e7d5ffaaabc0207bf200a117793a2";
@@ -178,7 +179,7 @@ bool flipbip_save_qrfile(
     const char* qr_msg_prefix,
     const char* qr_msg_content,
     const char* file_name) {
-    char qr_buf[90] = {0};
+    char qr_buf[FILE_MAX_QRFILE_CONTENT] = {0};
     strcpy(qr_buf, TEXT_QRFILE);
     strcpy(qr_buf + strlen(qr_buf), qr_msg_prefix);
     strcpy(qr_buf + strlen(qr_buf), qr_msg_content);