# Missing events Low/Info · Three Sigma · Hybrid orderbook DEX · 3rd April 2024 Finding 3S-Vertex-L16 of the Vertex security review. - Report: /reports/vertex - Source: https://github.com/0xsimao/audits/blob/main/Three%20Sigma/2024-04-03-vertex.pdf --- ### Description Some state changes are missing events: - [ArbAidrop](https://github.com/vertex-protocol/vertex-contracts-3sigma-audit/blob/main/contracts/ArbAirdrop.sol#L11), all functions. ### Recommendation Emit events for all relevant state changes. ### Status Acknowledged Disclosed by 0xSimao (https://0xsimao.com/). --- Related findings: - [Missing admin change events](https://0xsimao.com/findings/keyring-ii-missing-admin-change-events): Keyring Credentials - [Important events are missing](https://0xsimao.com/findings/metazero-i-important-events-missing): MetaZero Omnichain NFTs - [Missing some events](https://0xsimao.com/findings/metazero-ii-missing-events): MetaZero Staking - [Missing events](https://0xsimao.com/findings/trestle-missing-events): Trestle wTIA Bridge