USDB on Spark
Built directly on Bitcoin with Spark. Each USDB is backed 1:1 by Treasury bills and cash. No bridge needed and nothing to wrap.
Dollars and Bitcoin in one wallet
Keep your spending balance steady, and let Blitz receive USDT or USDC from 9 networks and convert it to BTC or USDB for you.
What you get
Hold Bitcoin and dollars together
Earn while you hold
Hold 10+ USDB and get up to 6 percent back, paid each day in BTC. USDB involves issuer risk.
Swap between BTC and USDB instantly
Swap inside Blitz in seconds. Keep savings in BTC and keep spending money in dollars.
Receive from any supported network
Your accumulation addresses work with Arbitrum, Base, BNB Chain, Ethereum, Optimism, Plasma, Polygon, Solana, and Tron. If someone sends USDC or USDT there, Blitz converts it to BTC or USDB for you.
Spend either balance
Pay contacts, send gifts, fund pools, use paylinks, or pay at POS with your BTC or USDB. You do not need to switch wallets to use a different balance.
Keep the stability without the limits
Why keep dollars on Bitcoin
| Feature | Blitz with USDB | Typical stablecoin wallet |
|---|---|---|
| Rail | Native on Bitcoin with Spark | Runs on Ethereum, Tron, or Solana |
| Rewards for holding | Up to 6 percent back, paid daily in BTC when you hold 10+ USDB | Most do not offer rewards |
| Auto-convert from 9 networks | Available | Not available |
| Spend easily | One balance for both | Separate balance for each network |
Do your own check before you hold USDB: Read the
current details on issuer, reserves, redemption, and rewards in the
app and on
Brale’s site. Every stablecoin carries issuer and platform risk.
How to start
Three ways to get USDB
Swap BTC to USDB
Open Swap in Blitz, enter how much you want to change, review the rate, and confirm. Your new balance shows in dollars.
Get paid on Lightning
Share your Lightning address. In settings you can have incoming payments convert to USDB automatically if you want to keep the value steady.
Receive USDT or USDC from other networks
Copy an accumulation address for the network you want to use. When someone sends USDC or USDT there, Blitz converts it to USDB or BTC.
FAQ
Common questions
Is USDB safe to hold?
USDB is designed to be backed by Treasuries and cash held by Brale. Check the latest reserve reports, audits, and redemption terms before you decide if it fits your needs. Read the USDB details.
How long will rewards be available?
Keep at least 10 USDB to get up to 6 percent back, paid each day in BTC. Terms can change, so check the app for the current offer. Like all stablecoins, USDB carries issuer and platform risk.
What are the fees?
You pay a small fee when you swap, which you see before you confirm. There is no fee just to hold USDB.
Hold dollars and Bitcoin in one place
Keep dollars for daily spending and BTC for saving. Swap between them instantly in one wallet.