1 year ago
Offchain Labs co-founder Ed Felten said determination were 1 oregon 2 fraud challenges submitted connected a mentation of Arbitrum moving connected the Ethereum proof-of-work fork aft the Merge, which was defeated.
Not a azygous fraud impervious has been submitted connected Arbitrum since it archetypal launched its mainnet with the built-in information diagnostic successful August 2021, according to Ed Felten, co-founder and main idiosyncratic of the Arbitrum-building Offchain Labs.
Operating arsenic an Ethereum layer-2, Arbitrum’s interactive, multi-round fraud proofs enactment by allowing a layer-1 verifier declaration to determine whether the challenger’s fraud-proof submission is valid. If so, the fraudulent validator’s involvement is slashed.
Fraud proofs are submitted by challenging validators erstwhile it considers different validator to person fraudulently oregon different incorrectly assembled an incoming batch of transactions into the adjacent block.
However, Arbitrum’s mainnet is yet to spot a fraud-proof effort fto unsocial a palmy challenge, Felten told Cointelegraph astatine Korean Blockchain Week connected Sept. 4:
“Not connected mainnet. We did person 1 oregon 2 connected Ethereum proof-of-work (POW). After the Merge, [...] determination was a mentation of Arbitrum moving connected the Ethereum POW fork and idiosyncratic did effort to bargain each the information and determination was a palmy situation which defeated that.”Felten said fewer fraud impervious attempts person been made due to the fact that malicious-intended validators are hazard losing their full stake.
“If immoderate 1 idiosyncratic notices it and disputes your assertion past you volition surely suffer your stake, truthful there’s a stronger disincentive to try,” Felten added.
Both Arbitrum and Optimism run arsenic optimistic rollups!
However, Optimism and Arbitrum disagree successful their approaches to fraud-proof mechanisms.
Arbitrum: multi-round → longer confirmation times, much secure
Optimism: single-round → faster
Felten said there’s presently a permission acceptable of validators — astir 12 — that enactment successful the fraud impervious game.
He besides added that Arbitrum is rolling retired a caller iteration of the fraud proofs called “BOLD” protocol — (Bounded Liquidity Delay) which helium says gives Arbitrum a faster warrant for challenges.
“In the existent mentation [...] an adversary who's consenting to sacrifice aggregate stakes tin put to origin “N” weeks of hold if they're consenting to sacrifice “N” stakes [...] But the BOLD protocol says nary substance however galore stakes they sacrifice, they'll beryllium defeated successful astir 8 days.”Related: Arbitrum laminitis says Stylus is simply a crippled changer for EVMs
Arbitrum’s BOLD protocol was rolled retired by Offchain Labs connected Aug. 4.
After months successful dev, we’re announcing BOLD (Bounded Liquidity Delay), a caller quality protocol that enables permissionless validation for Arbitrum chains, perchance removing the request for permissioned validation, dramatically improving decentralization. https://t.co/SHegVRGqXf
— Offchain Labs (@OffchainLabs) August 3, 2023Felten said Arbitrum’s fraud impervious diagnostic will soon beryllium permissionless, allowing anyone to propulsion towards ensuring the correctness of the concatenation erstwhile challenges are made.
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