SegWit
A Bitcoin protocol upgrade that restructured transaction data to increase effective capacity.
Segregated Witness (SegWit) is a Bitcoin protocol upgrade that restructured how transaction signature data is stored, effectively increasing the number of transactions that fit in a block and fixing a technical issue called transaction malleability.
SegWit adoption also laid technical groundwork that later enabled further upgrades, including the Lightning Network's broader development.
Examples
- A Bitcoin address starting with "bc1" is typically a SegWit-compatible address.
- SegWit transactions are generally more space-efficient than pre-SegWit transaction formats.
Learn more
Understanding Bitcoin Transaction Fees
Read the full guide
Transaction Malleability
Read the Transaction Malleability glossary definition
Bech32 (Native SegWit Address)
Read the Bech32 (Native SegWit Address) glossary definition
Block Size
Read the Block Size glossary definition
User-Activated Soft Fork (UASF) and Miner-Activated Soft Fork (MASF)
Read the User-Activated Soft Fork (UASF) and Miner-Activated Soft Fork (MASF) glossary definition