# txType == TransactionType.ExecuteSlowMode may cause batch of transactions to fail due to _slowModeConfig.txUpTo < _slowModeConfig.txCount Low/Info · Three Sigma · Hybrid orderbook DEX · 3rd April 2024 Finding 3S-Vertex-L10 of the Vertex security review. - Report: /reports/vertex - Source: https://github.com/0xsimao/audits/blob/main/Three%20Sigma/2024-04-03-vertex.pdf --- ### Description txType == TransactionType.ExecuteSlowMode allows the sequencer to execute slow mode transactions. However, these transactions can also be executed permissionlessly. Endpoint::_executeSlowModeTransaction reverts if _slowModeConfig.txUpTo < _slowModeConfig.txCount, which means that if before executing Endpoint::submitTransactionsChecked(), someone executes the slow mode transactions up to the latest, the whole batch will revert. ### Recommendation This is unlikely to happen as there is a significant delay in slow mode transactions, which is ignored by the sequencer. Nontheless, an early return can be performed instead of reverting in Endpoint::_executeSlowModeTransaction. ### Status Acknowledged Disclosed by 0xSimao (https://0xsimao.com/). --- Related findings: - [BatchOut:executeBatchWithdrawFromStrategyWithSwap() gives unfairly different slippage depending on the chosen token](https://0xsimao.com/findings/clip-finance-i-withdraw-unfairly-slippage-depending): Clip Finance Strategies