Withdrawal Throttles

When a pool exceeds its configured utilization limit, stricter withdrawal rules apply to protect against rapid liquidity drains under stress.

• After a withdrawal from a specific obligation, a pool-defined cooldown prevents immediate sequential withdrawals from the same obligation while the pool remains above its limit. Each DepositPosition tracks a last_scarcity_withdraw_ts — the timestamp of when the last scarcity withdrawal took place — enabling per-position cooldown enforcement.
• Each withdrawal is capped by a pool parameter (withdraw_max_scarcity_fee_bps), which allows withdrawing only up to a fixed percentage of remaining pool supply while the pool is under stress.

In extended high-utilization mode (for example above 85%), the system can further restrict withdrawals per address per block and apply a small exit fee that can be directed to an insurance or protocol fund. Users can still exit, but not in a way that empties the pool faster than it can recover.