...also apparently they aren't going to make people wait days or weeks to settle.
But so what? Who cares about stablecoins? Well, given all the various "bitcoin" wallets that have been introducing stablecoins, I wondered if there was a world where we could get no-coiner stackers zapping sats from their Mastercards.
Seems like probably not:
Mastercard will support settlement using regulated stablecoins including Circle’s USDC, which is already supporting early on-chain settlement flows in select markets, as well as Paxos-issued stablecoins including PYUSD, USDG and USDP, Ripple’s RLUSD and SoFi’s SoFiUSD. These stablecoins will be enabled across a range of supported blockchain networks including Arbitrum, Base, Canton, Ethereum, Polygon, Solana, Tempo and XRPL.
ARQ (formerly known as DolarApp), CBW Bank, Cross River, Lead Bank and Nuvei are expected to be among the first to support stablecoin settlement optionality in the United States and Latin America, with further expansion planned through 2026.
These are all deep in shitcoin land, about the closest I've heard to a Bitcoin wallet that also does USDC is CashApp (#1498479). I think Tempo (Stripe's stablecoin blockchain thingie) also has USDC -- which may mean that somewhere in the future Spark wallets would be able to receive USDC and convert it to sats. Of course, the self-sovereignty is long gone at that point.
Should I even care about the possibility no-coiners can zap sats on SN?Should I even care about the possibility no-coiners can zap sats on SN?
I haven't yet had occasion to use a stablecoin (unless you count ecash or Spark or Ark...#1286449), but I'd be fine if some shitcoiner/no-coiner wants to send me a zap that originates from their Mastercard. As long as it lands as sats in my wallet, should I not be happy?
"which may mean that somewhere in the future Spark wallets would be able to receive USDC and convert it to sats. Of course, the self-sovereignty is long gone at that point."
You can always send SATs out of spark somewhere else. Or send the usdc and convert to sats, convert to on-chain etc so its not like these systems aren't interoperable
I'm not very adept at these things. In what wallet can I receive USDC, convert to sats, and then send sats out on lightning?
I see Spark supporting these pieces, but I'm unclear which wallet software actually supports this right now.
Looks like Blitz Wallet (which is a Spark-based wallet) lets you receive and swap between a USDB balance. But I don't think I can receive USDC directly to Blitz.
Tether's wallet (#1471088) is also Spark-based but they support USDT. I'm curious if you can swap between sats balances and USDT balances, but I haven't been curious enough to go through actually trying the tether wallet out.
What is the flow you see for sending udsc and converting to sats?
I'm pretty sure that acqua wallet will do it, although i haven't looked specifically. And I'm pretty sure there are other wallets as well because usdc/usdt are pretty common.
I know that robosats can easily go from usdt/usdc to sats and my understanding is that there are other decentralized exchanges that do too.
In addition to this swap services, I think boltz now supports stablecoins and my understanding is more lightning infrastructure... Will too.
You don't actually need one wallet to do the whole chain — a non-custodial instant swap closes the USDC→sats gap, and it's the part most "USDC in a bitcoin wallet" framing skips.
Services like FixedFloat (ff.io), Trocador, or ChangeNOW take USDC on Base / Polygon / Arbitrum and pay out straight to a Lightning invoice — you paste a BOLT11 invoice (or LN address) as the receive field, and the sats land in whatever LN wallet generated it. No account, no KYC for modest amounts.
The catch is the spread, and it varies more than people expect (numbers I've actually measured on XMR/USDC routes this week, same idea applies to USDC→BTC-LN):
So Spark/Blitz handle the sats side fine; the USDC→sats leg is just an instant swap, and which rail you pick is the difference between paying ~1% and ~7%. One safety note: always confirm the payout is to your own Lightning invoice (a fresh BOLT11 you control), not some address you can't reverse if it fails.
Stables > ACH