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Watch This Episode On YouTubeListen To This Episode:On this episode of “The Van Wirdum Sjorsnado,” hosts Aaron van Wirdum and Sjors Provoost mentioned SIGHASH_ANYPREVOUT, a proposed new sighash flag that may allow a cleaner model of the Lightning Community and different Layer 2 protocols.Sighash flags are included in Bitcoin transactions to point which a part of the transaction is signed by the required non-public keys, precisely. This may be (virtually) your entire transaction, or particular components of it. Signing solely particular components permits for some flexibility to regulate the transaction even after it’s signed, which might generally be helpful.Van Wirdum and Provoost defined that SIGHASH_ANYPREVOUT is a brand new sort of sighash flag, which might signal many of the transaction, however not the inputs. Which means the inputs may very well be swapped, so long as the brand new inputs would nonetheless be suitable with the signature.SIGHASH_ANYPREVOUT can be particularly helpful within the context of Eltoo, a proposed Layer 2 protocol that may allow a brand new model of the Lightning Community. Instead of how Lightning customers presently have to retailer previous channel information for safety causes, and may be punished severely in the event that they by chance broadcast a few of this information on the improper time, van Wirdum and Provoost defined how SIGHASH_ANYPREVOUT would cast off this requirement.
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