DeFi Series
FAQ
What's the SegWit
Segregated Witness (abbreviated as SegWit) is an implemented protocol upgrade intended to provide protection from transaction malleability and increase block capacity. SegWit separates the witness from the list of inputs. The witness contains data required to check transaction validity but is not required to determine transaction effects.
Additionally, a new weight parameter is defined, and blocks are allowed to have at most 4 million weight units (WU). Non-witness and pre-segwit witness bytes weigh 4 WU, but each byte of Segwit witness data only weighs 1 WU, allowing blocks that are larger than 1 MB without a hard forking change.
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