There doesn't seem to be any cashu wallet that supports LNURL-auth. I tried with nutshell,
cashu pay lnurl1dp68gurn8ghj7um5v93kketj9ehx2amn9ashq6f0d3hxzat5dqlhgct884kx7emfdcnxkvfax43nzer9x5mrsd3svgcrgdp3v33k2vt9xqcngve4xsmk2wryxucrsv3cv5ersve5xpsnzcekvf3rwd3cv4jrqwf38pjrsdejv3nxxvqejdtje
and it failed giving me the output:
bolt11.exceptions.Bolt11HrpInvalidException: Human readable part is not valid.
Are there any technological reasons for which ecash wallets, be them fedimint or cashu, do not support LNURL-auth?
P.S. https://github.com/lnurl/luds/blob/luds/README.md#lnurl-documents does not seem to give an exhaustive list of wallets. I have tried authenticating with mutiny and it worked although the wallet is not listed there.
Fedi does
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I went on their website, https://www.fedi.xyz/faq . I cannot find the link to their repository or the link to their apk package. Where did you download it from?
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From their FAQ:
You download Fedi from the App Store (currently in test flight) or Google Play Store (beta access) and then scan a code provided to you by a particular Federation to join it.
They might not have "unofficial" release channels yet.