Is there a Cashu mint implementation that supports EUR (or USD, but I am more interested in EUR) tokens and has a callback for hedging for mint and melt operations (minting through Bitcoin of course) and can get an exchange rate somehow? Bonus points if there would be a way to swap BTC and EUR balances (basically a eur-side melt paying another mint invoice for sats denominated mint). Of course asking for a friend, I only do testnet EUR.