What is USDB？
USDB is a decentralized, over-collateralized stablecoin issued by Bucket on Sui, designed to track $1 USD and power capital-efficient leverage and liquidity across the ecosystem.
USDB serves two distinct user needs:
Volatile-asset holders borrow USDB against collateral to loop exposure (long-term leverage) or access liquidity without selling core positions.
Stablecoin allocators avoid asset volatility while earning yield by holding USDB and depositing into the sUSDB Savings Pool.
How to get USDB
Via CDPs (borrow)
Open a single-asset CDP, post supported collateral, and borrow USDB—typically for leverage or liquidity without selling the core asset. Details: see “How CDPs Work”
Via the PSM ( Stablecoins → 1:1 mint USDB)
Swap supported stablecoins to USDB through the Peg Stability Module (PSM) at 1:1 (not included fees). Ideal for stablecoin allocators who want USDB without touching volatile assets.
Supported assets & fees
PSM IN (Mint USDB)
USDC
0%
PSM IN (Mint USDB)
USDT
0.05%
PSM OUT (Burn USDB)
All supported
0.30%
Peg behavior, routing, and scenarios: see “USDB Peg”
Where to earn on USDB
Deposit USDB into the sUSDB Savings Pool for competitive, flexible yield with real-time accrual and flexible redemption. Details: see “sUSDB and Yield.”
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