Swift Yield
Borrow, trade and repay inside a single transaction.
$1,280
won at Superhack 2024: Best Dapp on Tenderly Virtual Testnet, plus a Worldcoin pool prize
- Zero-fee Balancer flash loan
- Three DEXs integrated
- World ID proof of personhood
The problem
Price gaps between DEXs close in seconds, and capturing them normally needs capital sitting idle, waiting.
What I did
Swift Yield was a team build: a Node.js bot and a flash-loan contract on Tenderly's Base Virtual Testnet.
How it works
Borrow with no fee
A Balancer flash loan lends 1 WETH with zero fee.
Trade the gap
The bot buys on one Uniswap V2-style DEX and sells on another: Uniswap, SushiSwap or PancakeSwap.
Repay in the same transaction
The loan is repaid before the transaction ends. If the trade isn't profitable, the whole thing reverts.
Prove you're human
World ID with zero-knowledge proofs gates who can deploy the contract.
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