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Fast Swaps is a swap interface built on top of Fast Protocol that lets users trade tokens on Ethereum mainnet while earning mev rewards. Swaps are backed by mev-commit preconfirmations, routed through the FAST RPC, and settled via the FastSettlement smart contracts on L1.
Fast Swaps landing page

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How Swaps Work

The swap experience follows a familiar DEX flow — select an input token, an output token, and an amount. What happens next depends on the input token:
Input TokenExecution
ERC-20 (e.g. USDC, DAI)You sign an off-chain EIP-712 intent. FAST RPC executes the swap via the FastSettlement contract — no gas required from you.
ETHYou submit the transaction directly from your wallet.

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Permit2

ERC-20 swaps require a one-time Permit2 approval per input token. Once a token is approved, subsequent swaps with that token only require a signature. If Permit2 has already been approved for a given token on another application (such as Uniswap), no additional approval is needed.

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Fast Miles

Users earn Fast Miles proportional to the mev their swaps generate through Fast Protocol. Miles are planned to be tokenized in the near future. Early users can also earn bonus miles through one-time tasks and referrals available in the app.

Launch Fast Swaps

Start swapping and earning miles.

Fast Swaps Deep Dive

Architecture, contracts, and EIP-712 signing details.