Asset Guide – sfastUSD

Guide to sfastUSD on Sei

What is sfastUSD?

sfastUSD is a staked version of fastUSD, created through the Elixir platformarrow-up-right. It allows users to earn rewards while maintaining liquidity on the Sei network, and can be used across DeFi protocols like Yei Finance.

Where do I get sfastUSD?

You can get sfastUSD from:

  • Swapping SEI or USDC for fastUSD and staking it on Elixir.

  • Bridging deUSD from Ethereum via Elixir and staking it to receive sfastUSD.


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The following methods are available as of Apr 27, 2025.

Get sfastUSD on Sei

Method 1: Swap for sfastUSD on Sei

  1. Swap vis Symphony.

    • Approve the transaction.

Method 2: Get deUSD on Elixir and bridge to Sei

  1. Get deUSD on Elixir.

  2. Bridge to Sei.

    • Approve the transaction.

  3. Stake fastUSD for sfastUSD.

    • Confirm the transaction.


Supply sfastUSD on Yei

  1. Deposit sfastUSD.

That’s it! 🎉 You are now utilizing your sfastUSD to earn rewards and Yei points.


Bridge sfastUSD out of Sei

Method 1: Swap sfastUSD for other assets on Sei

  1. Swap out of sfastUSD.

  2. Transfer out of Sei.

Method 2: Unstake sfastUSD on Elixir and bridge out of Sei

  1. Unstake sfastUSD back to fastUSD.

    • Start the unstake process (Elixir has a 7-day cooldown period).

    • Confirm the transaction and check the unstaking end date.

  2. Bridge fastUSD out of Sei.

    • Review and confirm the transaction.

  3. Swap out of deUSD.

    • Swap to any other asset.

    • or Unstake deUSD. (Elixir has a 7-day cooldown period)

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large transfers, start with a small test transaction to ensure a smooth process. Once comfortable, gradually increase the amount. Performing multiple test transactions is recommended to understand how the bridge operates.

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