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Crypto

SegWit

Segregated Witness — a 2017 Bitcoin upgrade that fixed transaction malleability, increased block capacity, and enabled the Lightning Network.

SegWit also fixed a bug that let people change transaction IDs. It was the upgrade that made Lightning Network possible.

It's like moving the signature to a separate envelope so the main letter can hold more words without getting bigger.

Real world: After SegWit, Bitcoin blocks could hold more transactions and fees dropped for a while, making the whole network faster and cheaper.

💡 SegWit is why Bitcoin can handle more activity today — it's one of the upgrades that keeps Bitcoin relevant and improving.