Core Contracts
Regnum Aurum Acquisition Corp
HardhatReal World AssetsNFT
77,280 USDC
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Submission Details
Severity: medium
Valid

Unrestricted Access in `RAACMinter::updateEmissionRate` Causes Token Accounting Mismatch

zgczgc

Summary

The RAACMinter::updateEmissionRate function is accessible to anyone and updates the emission rate without minting RAAC tokens for the stability pool corresponding to the previous emission phase. For example:

  • Phase 1: Blocks 100-200 with 50% emission rate

  • Phase 2: Blocks 200-300 with 60% emission rate
    Current implementation calculates amountToMint as (300-100)*60% instead of (200-100)*50% + (300-200)*60%.Causing discrepancies between the quantities calculated externally via RAACMinter::getEmissionRate and the actual amounts.

Vulnerability Details

function updateEmissionRate() public whenNotPaused { <==@found
if (emissionUpdateInterval > 0 && block.timestamp < lastEmissionUpdateTimestamp + emissionUpdateInterval) {
revert EmissionUpdateTooFrequent();
}
uint256 newRate = calculateNewEmissionRate();
emissionRate = newRate;
lastEmissionUpdateTimestamp = block.timestamp;
emit EmissionRateUpdated(newRate);
}

Impact

  • Accounting Discrepancy: Stability pool receives incorrect RAAC token balances

  • Emission Distortion: Historical emission periods become mathematically unreconcilable

Tools Used

  • Manual Review

Recommendations

Change the visibility of the RAACMinter::updateEmissionRate function to internal.:

- function updateEmissionRate() public whenNotPaused {
+ function updateEmissionRate() internal whenNotPaused {
if (emissionUpdateInterval > 0 && block.timestamp < lastEmissionUpdateTimestamp + emissionUpdateInterval) {
revert EmissionUpdateTooFrequent();
}
uint256 newRate = calculateNewEmissionRate();
+ tick();
emissionRate = newRate;
lastEmissionUpdateTimestamp = block.timestamp;
emit EmissionRateUpdated(newRate);
}
Updates

Lead Judging Commences

inallhonesty Lead Judge 7 months ago
Submission Judgement Published
Validated
Assigned finding tags:

RAACMinter tick applies new emission rates retroactively to past blocks by updating rate before minting tokens for previous period

inallhonesty Lead Judge 7 months ago
Submission Judgement Published
Validated
Assigned finding tags:

RAACMinter tick applies new emission rates retroactively to past blocks by updating rate before minting tokens for previous period

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