Hi,

I'm learning how bitcoin works and there is something I'm not sure I understand about Lighting network.

I've read it will solve the transaction volume (and fees) problem and that Bitcoin could be then used for daily transactions.
At the same time, it looks like Lighting network only makes sense if transactions are bidirectionnal. For instance I don't see why it's useful to pay the grocery store or my rent to my landlord, since they won't send me money on their side.

Am I missing something?