How SIGHASH_ANYPREVOUT And Eltoo Could Improve The Lightning Network

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In this episode of “The Van Wirdum Sjorsnado,” hosts Aaron van Wirdum and Sjors Provoost discussed SIGHASH_ANYPREVOUT, a proposed new sighash flag that would enable a cleaner version of the Lightning Network and other Layer 2 protocols.

Sighash flags are included in Bitcoin transactions to indicate which part of the transaction is signed by the required private keys, exactly. This can be (almost) the entire transaction, or specific parts of it. Signing only specific parts allows for some flexibility to adjust the transaction even after it is signed, which can sometimes be useful.

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