Eth opensea lazymint on-chain possible or impossible?

There is one more thing I would like to know.

Is this possible?

・Ethereum Blockchain
・Sell at openensea
・Mint is lazymint
・Save to on-chain(fully on-chain)



・Save files to ipfs://
meta+svg(base64) (I make this one)

・Purchaser buys at opensea


・Save to on-chain

Is this possible or impossible?

If you could let me know.
I would be very helpful.