Post by: Administrator on July 14, 2026, 03:29:34 PM
OP_CSFS authenticates signatures over arbitrary data. OP_CAT concatenates stack values into a single message. Together, they let Bitcoin scripts verify transaction structure at spend time, without pre-signed key management or new consensus rules beyond the two opcodes themselves.
Source: Bitcoin Covenants Part 4: OP_CHECKSIGFROMSTACK and OP_CAT (https://cointelegraph.com/research/bitcoin-covenants-part-4-op-checksigfromstack-and-op-cat?utm_source=rss_feed&utm_medium=rss&utm_campaign=rss_partner_inbound)