[wastedhours]

Are there any checkout systems pre-built solely for holding crypto afterwards, and not for converting to fiat? Guessing Coinbase has to have it like that because they interact with wider networks.

If you wanted to sell a saucy story, how'd it work? Essentially a hot wallet with a webhook?

[wampwamp]

You’d just need an extended public key that gives unique addresses to buyers and a price API to provide rate conversions. Your private key can be offline or on a hard wallet. Also see btcpayserver for an open source bitpay clone that does what you are thinking and more