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SIGHASH_NOINPUT

Also covering SIGHASH_ANYPREVOUT

SIGHASH_NOINPUT and SIGHASH_ANYPREVOUT are proposals for a signature hash (sighash) where the identifier for the UTXO being spent is not signed, allowing the signature to be used with any UTXO that’s protected by a similar script (i.e. uses the same public keys).

A noinput-style sighash is necessary for the proposed eltoo layer for LN.

Primary code and documentation

2019-12-28 2019 year-in-review: SIGHASH_ANYPREVOUT
2019-10-09 Continued discussion of noinput/anyprevout
2019-05-29 Criticism of SIGHASH_ANYPREVOUT and a generic alternative
2019-05-21 New proposed SIGHASH_ANYPREVOUT mode
2019-03-19 Discussion about increasing SIGHASH_NOINPUT_UNSAFE safety
2019-02-19 Tagging outputs to increase safety of SIGHASH_NOINPUT_UNSAFE
2019-01-08 SIGHASH_NOINPUT_UNSAFE edge cases
2018-12-28 2018 year-in-review: SIGHASH_NOINPUT
2018-11-27 Proposal included additional data in sighashes
2018-10-09 Discussion of the evolution of script: SIGHASH_NOINPUT_UNSAFE
2018-07-17 Renaming of SIGHASH_NOINPUT to SIGHASH_NOINPUT_UNSAFE

See also

Eltoo

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