util: rm a magic number

4 years ago · 32f88ae419
1 changed files with 2 additions and 1 deletions
--- a/electrum/util.py
+++ b/electrum/util.py
@ -1069,7 +1069,8 @@ def maybe_extract_bolt11_invoice(data: str) -> Optional[str]:
    data = data.strip()  # whitespaces
    data = data.lower()
    if data.startswith(LIGHTNING_URI_SCHEME + ':ln'):
-        data = data[10:]
+        cut_prefix = LIGHTNING_URI_SCHEME + ':'
+        data = data[len(cut_prefix):]
    if data.startswith('ln'):
        return data
    return None