SPA (Super Phat Arrow) on Nostr: It is a combination of OP_CHECKTEMPLATEVERIFY, OP_CHECKSIGFROMSTACK(VERIFY), ...It is a combination of OP_CHECKTEMPLATEVERIFY, OP_CHECKSIGFROMSTACK(VERIFY), OP_INTERNALKEY which enables covenants, LN-symmetry (eltoo) & PTLCS.It's safe. Maybe get reardencode on for a chat to explain it?