I made Bankify as a POC for how easy it is to receive cashu and convert it to LN:

GitHub

GitHub - supertestnet/bankify: Turn any cashu mint into a lightning wallet with NWC support

Turn any cashu mint into a lightning wallet with NWC support - supertestnet/bankify

As usual, I don't recommend using my code directly, but consider reimplementing it. It's not a lot of logic to do this.