Bitcoin Details SIGHASH_ANYPREVOUT Upgrade Under BIP-118

On July 7 2026 two technical articles outlined Bitcoin’s proposed SIGHASH_ANYPREVOUT (APO) soft-fork under BIP-118. The upgrade allows a single signature to authorize any compatible UTXO instead of one fixed outpoint, reducing key-management overhead for Lightning, vaults and layer-2 protocols. Analysts note that APO variants can omit the outpoint and even script commitments, while replay risk remains the chief design tradeoff. No immediate price catalyst is cited, yet the proposal is viewed as constructive for long-term Bitcoin scalability.