In a recent development, OP Labs, the brains behind the Optimism network, has unveiled a testnet version of its robust fault-proof system, as reported in an October 3 blog post. This significant stride forward is poised to cusher in a more decentralized and efficient Superchain, a noteworthy achievement for the network.
At present, OP Stack-based networks depend on centralized sequencers for bundling transactions and their subsequent submission to the Ethereum platform. A critical concern arises here: users lack the capability to submit fraud proofs to block errant sequencer activities, potentially resulting in fraudulent transactions being confirmed should a malicious actor seize control. L2Beat, in its assessment of Optimism, has voiced alarm about this vulnerability, emphasizing the need for users to trust the block Proposer to submit accurate L1 state roots.
OP Stack-based networks, like Optimism and Base, are designed as optimistic rollups, a type of layer 2 solution reliant on Ethereum for security. Ethereum co-founder Vitalik Buterin emphasized in a January 2021 essay that optimistic rollups must enable users to submit fraud proofs to combat fraudulent withdrawals to Ethereum for true decentralization.
OP Labs asserts that its newly introduced fault-proof system is a pivotal step towards realizing decentralization for OP Stack networks. This system has been crafted to ultimately facilitate secure bridging without the need for central fallback mechanisms.
What sets this system apart is its modularity, comprising three distinct components: a fault-proof program (FPP), a fault-proof virtual machine (FPVM), and a "dispute game protocol." The ability to implement these components separately opens the door for each network to customize its own fraud-proof system.
This modularity is anticipated to enhance diversity within the Optimism Superchain, bolstering the overall ecosystem's security. The post even hints at the possibility of networks opting to incorporate zero-knowledge proofs (ZK-proofs) as a form of fraud-proof, a departure from their typical utilization in zero-knowledge rollups.
OP Labs has been diligently working on constructing a network of interconnected blockchain networks known as the "Superchain." To achieve this ambitious goal, the company introduced the OP Stack—a suite of software tools enabling the creation of custom blockchain networks. It's worth noting that Avail network has unveiled "OpEVM" software, pursuing a similar objective while using Avail as the foundational layer instead of Ethereum. Additionally, Polygon's ZK Supernets and the zero-knowledge Ethereum Virtual Machine Hyperch ain are notable Superchain contenders.
This development represents a significant step forward in the pursuit of decentralization within the Optimism network, fostering a more secure and diversified ecosystem for the future.
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