Co-authored BIP 141, Segregated Witness — Bitcoin's most significant protocol upgrade since creation
3 entries
New SegWit v0 signature-hash algorithm: commits to the input's spent amount, fixes O(n^2) quadratic hashing, and changes OP_CODESEPARATOR/FindAndDelete handling.
Fixes ECDSA signature malleability with two consensus rules: LOW_S, requiring the lower-half S value, and NULLFAIL, requiring failing signatures be empty byte arrays.
Segregated Witness (SegWit) — Bitcoin's most significant protocol upgrade since creation. Separates signature from transaction data, fixing malleability, enabling Lightning, raising block capacity.