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.

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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

Direction	Asset	Fee
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”

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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.”