# Deprecation Mode

`KIBT` is minted and burned such that the total supply is always sufficient to buy out all of the KUMA Bonds NFTs held in the contract. However, in extreme cases, some of the `KIBT` supply may become inaccessible (e.g. if large amounts of `KIBT` are hacked or lost to unknown addresses). This could result in KUMA NFTs being locked in the `KUMASwap` contract. To mitigate this scenario, the DAO can vote to put the `KUMASwap` contract in deprecation mode where users can buy bonds with stablecoins through voted-on parameters. Since there is a unique `KUMASwap` contract for each risk category, one deprecated `KUMASwap` contract for a given risk category does not impact other `KUMASwap` contracts for different risk categories.<br>

When deprecation mode is activated, the `KIBT` yield is set to 0 (i.e. all `KIBT` tokens stop earning interest). After all of the bonds have been bought in the corresponding `KUMASwap` contract, users can redeem any of their leftover `KIBT` for stablecoin held in the `KUMASwap` contract through `redeemKIBT()`. The `KIBT`to stablecoin conversion rate is determined by how much stablecoin is held in the `KUMASwap` contract - e.g. If there's 100k KIBT and 100k stablecoin, each KIBT gives you the right to redeem 1 stablecoin.

Once entered, deprecation mode is irreversible for a given KUMA NFT risk category. After deprecation mode is enabled, `sellBond` in the `KUMASwap` contract is disabled; so users who have outstanding KUMA NFTs from the deprecated risk category can only redeem them directly through MCAG.