Segregated witness

Segregated witness (segwit) was a soft fork that activated in 2017.

This topic description is a stub. We would welcome a pull request providing more background information about the topic.

Primary code and documentation

• BIP141 segregated witness
• BIP143 verification of signatures in spends of segwit v0 witness programs

Optech newsletter and website mentions

2021

• Bitcoin Core #21009 removes logic needed to upgrade a pre-segwit node to segwit

2020

• BIPs #947 updates the BIP325 specification of signet to allow segwit-style virtual transactions
• Bitcoin Core #18044 adds support for announcing and requesting transactions by their segwit wtxid
• BIPs #933 adds BIP339 for transaction relay announcement using segwit wtxids
• Fee overpayment attack on multi-input segwit transactions

2019

• Question: Are there still miners or mining pools which refuse to implement SegWit?
• Bitcoin Core #15846 relays and mines transactions paying any segwit address version
• Bitcoin Core #14039 causes Bitcoin Core to reject legacy transactions encoded as segwit
• Bitcoin Core #14811 updates the getblocktemplate RPC to require that the segwit flag be passed

2018

• Temporary reduction in segwit block production
• Bitcoin Core #14454 adds support to the importmulti RPC for segwit addresses and scripts

See also

• Taproot

  
  

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