CS Note 8.1: Add Manager Can Increase Stake

[bingen]

The addManager is generally not trusted, as it can only improve the collateralization ratio of a trove. If the manager is set to address 0, anyone can add collateral to a trove.

However, increasing the collateral of a trove also increases its stake. In extreme scenarios where redistributions give more debt to active positions than collateral, an attacker could send collateral to another trove owner to increase their share in the bad redistributions.

Users who want to avoid this can set the addManager to the same address as the owner, which will disallow others from increasing their collateral.

[bingen]

We’ll add this risk to the list of known issues.