stSUI is a token that represents staked SUI. When you stake SUI through AlphaFi, you receive stSUI at the current exchange rate. As your staked SUI earns rewards, the rate between stSUI and SUI grows over time.
stSUI is freely transferable. You can hold it, trade it, or use it in DeFi.
What is an LST?
LST stands for Liquid Staking Token. It's a tokenized claim on staked assets that lets the holder:
Earn staking rewards — your tokens are staked and accruing yield in the background
Use the token in DeFi — trade it, lend it, supply it as collateral
Unstake quickly — without waiting through long cooldown periods
Without an LST, staked SUI is locked. You earn rewards but can't use the tokens for anything else.
How it works
stSUI follows a four-step user flow:
Action
Description
Stake
Deposit SUI, receive stSUI
Hold
stSUI grows in value as staking rewards accrue to the pool
Use
Transfer, supply as collateral, or use in DeFi — all while earning rewards
Unstake
Redeem stSUI for SUI instantly
Under the hood, the protocol delegates your SUI to validators on the Sui network. Each epoch, rewards come in and get added to the pool backing stSUI. The exchange rate rises.
Core Actions (Stake / Unstake)
There are only two on-chain actions a user takes:
Stake — Deposit SUI to receive stSUI at the current exchange rate.
Unstake — Redeem stSUI back to SUI, instantly, in one transaction.
Holding and using stSUI in DeFi require no further interaction with AlphaFi.
Key Features
Instant unstaking. Redeem stSUI for SUI in a single transaction. No cooldown period.
Yield built into the exchange rate. No claiming or compounding needed. The token appreciates against SUI as rewards accrue.
Multi-validator delegation. Staked SUI is distributed across multiple validators based on configured weights.
DeFi-composable. stSUI can be used as collateral, in liquidity pools, or in yield strategies on Sui.
Open source. The smart contracts and SDK are publicly available.
