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Discussing Bitcoin Softchains, Sidechains Utilizing PoW Fraud Proofs

02/13/2021
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On this episode of “The Van Wirdum Sjorsnado,” hosts Aaron van Wirdum and Sjors Provoost had been as soon as once more joined by Ruben Somsen. This time, they mentioned one in all Ruben’s personal proposals, referred to as “softchains.”

Softchains are a kind of two-way peg sidechain that makes use of a brand new sort of consensus mechanism: proof-of-work fraud proofs (or, as Provoost prefers to name them, “proof-of-work fraud indicators”). Utilizing this consensus mechanism, customers don’t validate the content material of every block, however as an alternative solely examine the proof-of-work header, like simplified cost verification (SPV) shoppers do. Through the use of proof-of-work fraud proofs, customers do validate the complete content material of blocks any time a blockchain fork happens. This gives a safety mannequin in between full node safety and SPV safety.

Somsen defined that by utilizing proof-of-work fraud proofs for sidechains to create softchains, Bitcoin full nodes may validate whole sidechains at minimal price. This new mannequin could be helpful for sure varieties of sidechains, most notably “block dimension improve” sidechains that do nothing fancy however do supply extra transaction capability. Van Wirdum, Provoost and Somsen additionally mentioned among the downsides of the softchain mannequin.

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