Slip-Fi

Slip-Fi is a mobile iOS dApp that optimizes large cryptocurrency swaps by splitting them into multiple smaller transactions.

Large swaps often suffer from slippage — the user receives less than expected due to liquidity depth. SleepFi uses the 1inch aggregator's Quote API to simulate 1–5 split strategies, compare the outcomes, and let users choose the most efficient one.

It gives traders transparency and control over how their swaps are executed — saving them money on large trades by reducing slippage.

The app is built with SwiftUI (iOS) and uses WalletConnect v2 to connect to wallets like MetaMask. It currently runs on Polygon and supports swapping USDC ↔ WETH.

SlipFi integrates multiple 1inch APIs:

Quote API for simulating swap outcomes

Approve API for handling ERC-20 approvals

Swap API for building and sending transactions

The app dynamically calculates the best split (1–5 parts) by simulating each path in parallel using withThrowingTaskGroup.

It features a MVVM architecture with live feedback during split swaps (e.g. “Part 1/3”), stores swap history with tx hashes, and opens links to PolygonScan for full transparency.

SlipFi makes 1inch’s backend logic visible and interactive — turning auto-split into a manual, user-optimized feature.