Introducing Boardwalk Cash - the first dollar-based Cashu wallet built on top of #bitcoin and connected to #nostr. We now have stablecash on bitcoin - completely interoperable with the lightning network. Share your lightning address or invoice to receive dollars. Paste a lightning address or invoice to send dollars. Boardwalk Cash connects to any nostr client via NWC. Zap dollars on nostr apps like @primal or on Discord with our Zap Bot. This is a very early product and there are not many public mints, so use at your own risk. Yet, we’re excited to show some of what ecash and nostr can offer for advancing #bitcoin payments. image

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I guess my specific question is; What is the exact line of code(s) do I need to enter to support USD? Trying to do this for our own mints
kiwi's avatar
kiwi 1 year ago
I like slave credits
curt finch 's avatar
curt finch 1 year ago
I look forward to a day when this is super easy to use for my grandmother
@bob estoy probando lo Pude recibir, pero no puedo enviar
bob's avatar bob
Introducing Boardwalk Cash - the first dollar-based Cashu wallet built on top of #bitcoin and connected to #nostr. We now have stablecash on bitcoin - completely interoperable with the lightning network. Share your lightning address or invoice to receive dollars. Paste a lightning address or invoice to send dollars. Boardwalk Cash connects to any nostr client via NWC. Zap dollars on nostr apps like @primal or on Discord with our Zap Bot. This is a very early product and there are not many public mints, so use at your own risk. Yet, we’re excited to show some of what ecash and nostr can offer for advancing #bitcoin payments. image
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Fascinating! How difficult would it be to either add other national currencies (say the Mexican peso or the Japanese yen)? As someone else said in the comments, they would want their grandmother to be able to use something like this, so having sats dominated in the local currency would make that way easier.
That single bullet which says “stabilizes USD price” needs some more detail on the collateralization mechanics.
NewBeliever's avatar
NewBeliever 1 year ago
Seems like it. They simply mint nuts at current btc exchange rate and redeem ecash at the current btc exchange rate. I'd like to know if the nuts themselves contain the metadata for what they are to make them all interoperable. Seems like a mint should be able to mint whatever you want and redeem whatever you want whether its eusd or eyen or ecorn.
1. Add a new active keyset with unit ‘usd’ 2. Convert amount in mint quote request to sats based on current exchange rate, then create invoice for that sat amount. 3. Convert sat from invoice to usd in melt quote request and return usd amount needed to pay the invoice. Happy to help if you want to get on a call
I do not think this should be a trading vehicle, thus I suppose each mint can make up their own rules. However down the line with a liquid derivatives market one could potentially manage a more sophisticated mint. However answering to individuals need of a less volatile medium of exchange is a use case and should have a price. Thus the mint could simply transfer the exchange rate risk upon to the user, meaning if btc price moves, the cost of exiting would be upon the currency holder and the benefits equally goes to the mint for its longevity and sustainability. BTC price down -> user gets entry amount of sats BTC price up -> mint gets entry-exit sats. A model like this would also give interesting possibilities for mints as revenue vehicles.
I didn’t mean to imply anything. I understand the complexity and there definately needs to be more clarity on mints. Interesting possibilities though. Aligning assumptions on use cases for ecash, ie type of user, amounts, timeframes, would maybe be a good start before evaluating risks.
Hey! Thanks for the feedback. This is a known issue we are working on that has to do with how certain wallets/mints process lightning address sends. Generating an invoice from the receive button and paying from Alby should work every time.
kiwi's avatar
kiwi 11 months ago
My autism won’t let me say it’s not 😅 money is whatever two or more parties agree on as a medium of exchange, it’s limitless on what could be money. Now whether that’s a good money is another conversation.
Is the BTC sent to mints overcollateralized to issue new USD tokens? Or does an actual exchange happen (with the mint probably needing to cover the trade elsewhere)?