> It’s currently challenging with Boltz swaps as onchain/lightning swaps accept different min sat values.
Not really sure why this is an issue? If the recipient includes a payment amount (at least that’s an understandable UX!) then you have your answer, if not, I don’t really see why it’s an issue - if the sender only supports one of (Lightning, onchain) then the payment will either succeed or fail just like it otherwise would. If the sender supports both, they’ll almost certainly default to Lightning, which will allow for lower minimum, so no issue. Also, you can communicate a Lightning min/max in a BOLT 11 even if it’s in a unified QR code, sooooo… You have to come up with a somewhat contrived scenario to have a problem here.
> This should be possible with a Spark/LDK backend, correct?
Not quite sure what you mean but a graduated wallet should have no issue, if that’s your question.
> Do we know why Muun hasn’t made unified QR codes the default option (it’s been an option for several years now I believe)?
No idea, not sure how active they maintain the current product.
> I got an error message when I pasted the unified QR from Muun (it includes a zero amount bolt11 invoice which isn’t supported everywhere).
Wtf? Who is left not supporting amountless BOLT 11s? It’s 2025, that’s sheer incompetence at this point.
> Those issues need to be sorted out before unified QR codes can work with a seemless UX.
The problem is every other UX is 5x worse. Unified QRs have some risk, but every other option just makes normal users close their app and use dollars. It’s time we hold ourselves to a higher standard than “geeks that know a lot about bitcoin can use it”
> How does Cash App format the unified QR code? (can’t test since it’s US only)
Just bitcoin:onchain?lightning=anountless bolt 11 IIRC.
matt / Matt Corallo
npub185…swrdp
2025-07-11 13:31:53 UTC
in reply to nevent1q…23fs
Author Public Key
npub185h9z5yxn8uc7retm0n6gkm88358lejzparxms5kmy9epr236k2qcswrdpPublished at
2025-07-11 13:31:53 UTCEvent JSON
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"content": "\u003e It’s currently challenging with Boltz swaps as onchain/lightning swaps accept different min sat values.\n\nNot really sure why this is an issue? If the recipient includes a payment amount (at least that’s an understandable UX!) then you have your answer, if not, I don’t really see why it’s an issue - if the sender only supports one of (Lightning, onchain) then the payment will either succeed or fail just like it otherwise would. If the sender supports both, they’ll almost certainly default to Lightning, which will allow for lower minimum, so no issue. Also, you can communicate a Lightning min/max in a BOLT 11 even if it’s in a unified QR code, sooooo… You have to come up with a somewhat contrived scenario to have a problem here.\n\n\u003e This should be possible with a Spark/LDK backend, correct?\n\nNot quite sure what you mean but a graduated wallet should have no issue, if that’s your question.\n\n\u003e Do we know why Muun hasn’t made unified QR codes the default option (it’s been an option for several years now I believe)?\n\nNo idea, not sure how active they maintain the current product.\n\n\u003e I got an error message when I pasted the unified QR from Muun (it includes a zero amount bolt11 invoice which isn’t supported everywhere).\n\nWtf? Who is left not supporting amountless BOLT 11s? It’s 2025, that’s sheer incompetence at this point.\n\n\u003e Those issues need to be sorted out before unified QR codes can work with a seemless UX.\n\nThe problem is every other UX is 5x worse. Unified QRs have some risk, but every other option just makes normal users close their app and use dollars. It’s time we hold ourselves to a higher standard than “geeks that know a lot about bitcoin can use it”\n\n\u003e How does Cash App format the unified QR code? (can’t test since it’s US only)\n\nJust bitcoin:onchain?lightning=anountless bolt 11 IIRC.",
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