crvUsd What is the model this time?

part3

Users mortgage ETH in LLAMMA to obtain USD. When the price of ETH falls insufficiently to support the price of USD, LLAMMA will liquidate and sell the collateral to repurchase USD to ensure the value of USD.

If the USD price in the market is higher than 1 USD, that is, the demand for USD is too high, then PegKeeper will trigger the currency issuance function and add USD to the USD-related stable currency pool. If the USD price is lower than 1 USD, it will trigger Burn function, burn some USD.

It is worth mentioning here that the USD issued by PegKeeper has no collateral, which means it is air. The white paper also emphasizes that these uncollateralized USD are liabilities. So how to ensure that this liability will not be too large?