Understanding SIGHASH_ANYPREVOUT: A Bitcoin Covenant Technical Deep Dive

bitcoin covenants bip 118

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Part 3 of a Bitcoin covenant series explains SIGHASH_ANYPREVOUT (BIP 118), a soft-fork upgrade allowing signatures to authorize spending any compatible UTXO, not just a specific one.
It removes the outpoint commitment, enabling signature reuse for Layer-2 protocols and covenant-like applications, but introduces replay risks.

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Part 3 of a Bitcoin covenant series explains SIGHASH_ANYPREVOUT (BIP 118), a soft-fork upgrade allowing signatures to authorize spending any compatible UTXO, not just a specific one. It removes the outpoint commitment, enabling signature reuse for Layer-2 protocols and covenant-like applications, but introduces replay risks.

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