I understand it is a custodial node (mint) with on-chain and lightning capabilities. Most use lightning for in/out.

But when you put BTC funds into the mint, you are given eCash tokens. In the mints I'm in, they appear to be a 1 to 1 equivalent of sats.

I can transfer the eCash tokens to anyone in the mint privately.

I can transfer those to another mint using a mint swap.

I can transfer to my lightning node with an invoice.

I believe I saw someone working on on-chain abilities but can't remember who or where.

I'll ship you some nuts so you can play with it.