Submission Details
Severity:
skew and openInterest for a market will be completely incorrect after liquidation
Description
In the liquidateAccounts function, the skew and openInterest instead of getting recalculated and updated are being set to zero [reference]
// ctx.newOpenInterestX18 and ctx.newSkewX18 are never initialized with any value
perpMarket.updateOpenInterest(ctx.newOpenInterestX18, ctx.newSkewX18);
Also the assumption open interest and skew are both decreased by liquidations [ref] is incorrect as the skew can increase by liquidation!
Recommendation
Calculate the new openInterest and skew values, and update it.
Updates
Lead Judging Commences
inallhonesty about 1 year ago
Submission Judgement Published Assigned finding tags:
`liquidateAccounts` calls `updateOpenInterest` with uninitialized OI and skew)
Prize pool breakdown
Total prize
60,000 USDC
nSLOC
2,87821 USDC / LOC
50,000 USDC
5,500 USDC
4,500 USDC
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