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But can they scale, considering the block size limit? I would think not many will actually use onchain zaps because fees will else go through the roof.
they won't scale, but people will bounce between them depending on where fees are at. anything I can do to help contribute to a healthy fee market! at least people would be using it for monetary use cases to price out spam.
Ahh, ok, makes sense, thank you!
Will onchain zaps also not have the issue that their receipts can be faked?
i think we can make the unfakable by construction, although I haven't though too much into it yet. they will always be verifiable as real to yourself since they will be sent by a trusted node that is covered by a signature. lightning zaps work the same way.
there's nothing wrong with lightning zaps, but onchain zaps are simpler to custody and don't have liquidity issues.
I had this thought recently since the blocks are so empty, could starting using onchain for actual payments against instead of just jpgs.