The Fault-Proof System in the OP Stack is under active development and subject to frequent modifications. It has also undergone multiple security audits, during which several vulnerabilities were identified. In this blog post, we’ll discuss five real-world bugs that auditors and researchers uncovered in early 2024-25. While all identified issues were promptly addressed, and none
In Part 1 – “Fault Proofs 101” we mapped the why: Optimism’s June 2024 hard-fork switched on permissionless fault proofs, letting anyone roll back a malicious output root and moving OP Mainnet’s trust model closer to Ethereum. Part 2 – “FPP, FPVM & the Pre-image Oracle” broke down the what: the stateless program, the deterministic
OP Stack chains today secure roughly $5 billion in user assets by publishing an output root to Ethereum every few minutes. Fault proofs make the output root falsifiable. But a proof only works if the verifying VM can replay the exact same inputs the rollup saw. Delivering those bytes – securely and deterministically – takes
While zero‑knowledge integrations such as OP Succinct inch closer to production, most of the value locked in Layer‑2 still depends on “optimistic” assumptions – thanks to simpler design, stronger tooling, and years of battle‑testing. That puts Optimism’s Fault Proof System on center stage as the last line of defense for billions in L2 value. Fault Proofs 101
Discover how Optimism blockchain works, its important features, and vital use cases as a Layer 2 solution.
