Aave V3 includes two mechanisms that help prevent liquidations: the L2 sequencer halting protection and the unpause grace period.

• L2 sequencer halting. The protocol can provide a grace period for users to adjust their positions when the L2 sequencer halts. During this period, users can top up collateral or repay debt, and liquidations are blocked so their positions remain protected. This should not be used to worsen positions, which is why borrowing is disabled during the grace period.
• Unpause with grace period: The protocol can also provide a grace period after unpausing a reserve. Users have time to fix their positions while liquidations are temporarily disabled. This action is typically paired with setting LTV = 0, preventing new borrowing against the affected collateral (and forcing users to withdraw that asset first, if applicable).

V4 can have a more flexible mechanism by introducing a liquidatable flag, so V3 use cases can be replicated and extended by building automation on top.

• For L2 sequencer halting, instead of relying on an L2 uptime feed, an automated agent can detect the halting event and push an update from L1 to L2 to disable liquidations for that asset for a defined period.
• For unpausing, the action can be paired with disabling liquidations and introducing a new dynamic config with CF = 0, ensuring that users are protected from liquidation for a period of time while still preventing them from making their positions riskier (via borrow or withdraw).