oneinch

Rust client for the 1inch DEX Aggregator Swap API v6.0.

Overview

1inch is one of the most popular DEX aggregators, offering optimal swap routes across hundreds of liquidity sources on multiple chains.

Features

• Multi-chain support (Ethereum, BSC, Polygon, Arbitrum, Optimism, Base, etc.)
• Advanced Pathfinder algorithm for optimal routing
• Type-safe request/response handling
• Automatic rate limiting awareness
• Token approval helpers

Authentication

The 1inch API requires an API key. Get yours at portal.1inch.dev.

Rate Limits

• Free tier: 1 request per second, 100,000 calls per month
• Higher tiers available for production use

Quick Start

use oneinch::{Client, Chain, QuoteRequest};

#[tokio::main]
async fn main() -> Result<(), oneinch::Error> {
    // Create client with your API key
    let client = Client::new("your-api-key")?;

    // Get a quote for swapping 1 ETH to USDC on Ethereum
    let request = QuoteRequest::new(
        "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE", // Native ETH
        "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", // USDC
        "1000000000000000000", // 1 ETH in wei
    );

    let quote = client.get_quote(Chain::Ethereum, &request).await?;
    println!("Expected output: {} USDC", quote.to_amount);

    Ok(())
}

Installation

[dependencies]
oneinch = "0.1"
tokio = { version = "1", features = ["full"] }

License

MIT