Protocol & Consensus • Estimated 70m

OP_CHECKSIGFROMSTACK

protocol.op-checksigfromstack

OP_CHECKSIGFROMSTACK verifies signatures over stack-provided messages instead of transaction fields alone. It is a common building block in advanced covenant proposal discussions.

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Curated resources (3)

• Bitcoin Optech Topic: OP_CHECKSIGFROMSTACK (article) Historical proposals and modern usage context.
• BTC Transcripts: op-checksigfromstack (article) Protocol discussions around feasibility and risk.
• Programming Bitcoin (book) Practical walkthrough of Script and transaction construction from first principles.

Direct prerequisites (1)

• Taproot

Direct dependents (0)

• None

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