# Immutable variables are emitted in events Low/Info · Three Sigma · Permissionless lending · 23rd August, 2024 Finding 3S-SY-N04 of the Maple Syrup security review. - Protocol: https://maple.finance/ - Report: /reports/maple-finance-syrup - Source: https://github.com/0xsimao/audits/blob/main/Three%20Sigma/2024-08-23-maple-finance-syrup.pdf --- ### Description The following immutable variables are unnecessarily included in event emissions: - SyrupUserActions::_swap() - `syrupUsdc` in `Swap` event. - MplUserActions::_redeemAndMigrateAndStake() - `xmpl` in `RedeemedAndMigratedAndStaked` event. ### Recommendation Immutable variables can not be changed, unless upgraded, so an event may not be necessary.