51493 sc insight misleading view function documentation

Submitted on Aug 3rd 2025 at 11:20:30 UTC by @heavyw8t for Attackathon | Plume Network

• Report ID: #51493

• Report Type: Smart Contract

• Report severity: Insight

• Target: https://github.com/immunefi-team/attackathon-plume-network/blob/main/plume/src/facets/RewardsFacet.sol

• Impacts: (none specified)

Brief/Intro

The _earned function in RewardsFacet.sol is documented as an "Internal View Function" but actually modifies state by calling calculateRewardsWithCheckpoints(), which updates storage variables.

Vulnerability Details

See POC

Impact Details

Insight: The documentation is incorrect and misleading.

Proof of Concept

Proof of Concept — details

The function comment states "Internal View Function (earned)," but the implementation calls PlumeRewardLogic.calculateRewardsWithCheckpoints(), which in turn calls updateRewardPerTokenForValidator(). This function modifies several storage variables:

• $.validatorLastUpdateTimes[validatorId][token] = block.timestamp

• $.validatorRewardPerTokenCumulative[validatorId][token] += rewardPerTokenIncrease

• $.validatorAccruedCommission[validatorId][token] += commissionDeltaForValidator