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EarnUSDT is SuperEarn’s yield-bearing USDT token on Kaia.
Each EarnUSDT represents a share of the SuperEarn stablecoin portfolio, which is aggregated in the Super Vault and deployed across Kaia-native and multichain strategies. From a user or integrator’s perspective, EarnUSDT behaves like a standard ERC‑20 token that naturally accrues yield over time.

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Overview

When a user deposits Kaia USDT through the SuperEarn app (via SuperEarnRouter):
  • Funds enter the Cooldown Vault (not directly callable by users), which enforces withdrawal cooldowns and loss limits.
  • In return, the user receives EarnUSDT, a token that tracks their pro‑rata share of the overall SuperEarn portfolio.
  • Behind the scenes, this portfolio is managed by the Super Vault and its connected cross‑chain vaults; users only see a single token balance and a single yield stream.
You can think of EarnUSDT as “one token that bundles many strategies” — lending, RWA, and other risk‑managed positions — without users needing to handle any of those integrations directly.

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Value Accrual Model

EarnUSDT uses a price‑per‑share model instead of rebasing balances:
  • Your EarnUSDT balance stays constant in your wallet.
  • As the underlying portfolio earns yield, the USDT value of each EarnUSDT increases.
  • This is reflected in the share price (vault assets ÷ total shares), which is determined by the SuperEarn vault stack.
On deposit:
  • The user receives EarnUSDT based on the current exchange rate.
  • Example: deposit 1,000 USDT → receive ~1,000 EarnUSDT (exact amount depends on the current share price).
Over time:
  • If the portfolio earns yield, 1 EarnUSDT may later be redeemable for, say, 1.03 USDT, subject to protocol policies and loss limits.
This model makes EarnUSDT:
  • Easy to integrate (plain ERC‑20 balance),
  • Easy to account for (no rebasing), and
  • Naturally composable with other DeFi protocols.

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Lifecycle: Mint → Use → Redeem

Mint
  • Deposit Kaia USDT via the SuperEarn interface or by integrating with the protocol.
  • The protocol mints EarnUSDT to the depositor at the current price‑per‑share.
Use
  • Hold EarnUSDT to accrue yield.
  • Move EarnUSDT into other DeFi protocols (DEX pools, lending markets, structured products, etc.) just like any fungible ERC‑20 token.
  • Track your position: most portfolio and wallet UIs can treat EarnUSDT like “interest‑bearing USDT”.
Redeem
  • To exit, users return EarnUSDT through the SuperEarn withdrawal flow via SuperEarnRouter (no direct user calls to CooldownVault).
  • EarnUSDT is burned, and the user receives Kaia USDT based on the latest share price.
  • Redemptions are subject to protocol‑level rules:
    • cooldown periods,
    • liquidity management, and
    • loss‑limiting / risk controls in the vault stack.
For the detailed mechanics of how the vaults source and manage liquidity for redemptions, see the Super Vault and How SuperEarn Works pages.

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Integrations

EarnUSDT is designed to be:
  • Composable – standard ERC‑20 interface; no special handling required.
  • Portfolio‑backed – each token represents a claim on a diversified, risk‑managed stablecoin portfolio.
  • Chain‑local – on Kaia, it behaves like a normal Kaia‑native asset.
For exact contract addresses and integration examples, see the Integrate EarnUSDT docs in the Developers section.

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Risk Considerations

Holding or integrating EarnUSDT exposes users to the risks of the SuperEarn architecture and its underlying strategies, including:
  • Smart contract risk in SuperEarn and integrated DeFi/RWA protocols
  • Counterparty and credit risk where RWAs or off‑chain components are involved
  • Liquidity and slippage risk during large redemptions or market stress
  • Operational and messaging risk around bridging and cross‑chain execution
External protocols that integrate EarnUSDT are encouraged to surface these points in their own documentation and user interfaces.