CIP#29 - Fix potential vulnerability on changing A down in old pools

Summary:

A fix for a vulnerability reported by Peter Zeitz is deployed and ready to be executed. The idea is to limit the imbalance when the parameter change can be applied.

You can read about the vulnerability there: Curve Vulnerability Report. Hi, this is Peter Zeitz, an economics… | by Peter Zeitz | Medium

You can find the fix at this address: Fixing the issue with abrupt change of A by michwill · Pull Request #44 · curvefi/curve-dao-contracts · GitHub

Specification:

Fixing the issue with abrupt change of A by michwill · Pull Request #44 · curvefi/curve-dao-contracts · GitHub

Poll:

https://dao.curve.fi/vote/ownership/22

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