I'm making lazy minting code, and is there any example I can access?
or can I get some idea?
I'm wondering these.

1. how can I request user wallet (tonkeeper) to sign some data.

2. if #1 is solved and I construct DB, how can I let user's nft after minted to transfer to somewhere I want to send.
can I make AuthenticatedProxy in ton chain, i.e. can I use delegate call?
and if I can, how can I let nft to give authentication before minted?