MISSING TOOTH FILLED IN: Optimism, the Ethereum layer-2 project, provides the technological foundation for some of the biggest names in blockchain, including the Coinbase exchange’s popular Base blockchain and Worldcoin’s World Chain, from OpenAI founder Sam Altman. However, blockchains using Optimism’s technology were operating under a false premise for years – that they “borrowed” Ethereum’s security apparatus. In reality, they lacked a crucial functionality known as “fault proofs” which are used to challenge suspected malicious behavior. On Monday, this long-awaited technology was finally implemented on Optimism’s mainnet, as reported by CoinDesk’s Margaux Nijkerk on Tuesday. “We literally deleted the entire system essentially, re-architected it, and rewrote the entire thing,” said Karl Floersch, CEO of OP Labs, in an interview with CoinDesk. “That was brutal, but absolutely the correct decision.” This achievement may address some of the project’s harshest criticism; similar “proof” technology is utilized by all layer-2 rollup networks, including Optimism competitors like Arbitrum. Without fault proofs, users depositing funds into Optimism had to trust the rollup’s “security council” to return their funds – a system vulnerable to potential human error or bias. With fault proofs, users should only need to trust Ethereum’s security. However, for now, the Security Council will remain intact and could still intervene if the fault-proof system fails.
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