lack of input sanitization breaks MomentumUpdateRule weight calculation
Summary
In the MomentumUpdateRule, kappa serves as a measure of aggressiveness. With a scale of [-1, 1], scenarios may arise where the kappa vector has values that sum to 0 despite containing both positive and negative values.
Example with 4 kappa values:
[-0.5e18, 0.25e18, 0.2e18, 0.05e18]
While each value individually satisfies the expected range, a sum of 0 introduces calculation errors in the system.
Impact
A kappa vector summing to 0 causes broken calculations in the MomentumUpdateRule.
Tools Used
Manual review.
Recommendations
Use the absolute value for kappa to avoid summation issues:
Lead Judging Commences
Informational or Gas / Admin is trusted / Pool creation is trusted / User mistake / Suppositions
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