LayerZero Research completes formal verification of Jolt bytecode expansion

Jolt: Jolt is the zk-VM that processes RISC-V guest programs by implementing a subset of instructions along with virtual ones and emulating others via bytecode expansion. It serves as the core of Zero's proving architecture. The completed formal verification using Lean establishes correctness of the expansion step for all inputs rather than sampled tests. Zero: Zero is the project whose proving architecture relies on the Jolt zk-VM as a foundational component. The recent formal verification of Jolt bytecode expansion directly bolsters the reliability of Zero's stack by mathematically confirming simulation equivalence. This work builds on prior updates such as the introduction of the Akita polynomial commitment scheme. LayerZero Research: LayerZero Research is the group behind the announcement of formal verification efforts for components in zk-VM technology. It has completed verification of Jolt's bytecode expansion process using the Lean proof assistant. The group is releasing related preprints, proofs, and documentation to support ongoing work on Zero's proving architecture. Documentation Release: The effort includes a preprint paper for peer review submission and a public repository containing the machine-checked proofs and technical details on assumptions and trust boundaries. Verification Approach: Formal verification mathematically proves code correctness for every possible input using proof assistants like Lean, providing stronger guarantees than traditional testing methods.