cowswap

Unofficial Rust client for the CoW Protocol (CowSwap) API

Features

• MEV Protection - Batch auctions protect against frontrunning
• Gasless Trading - Fees are taken from output tokens
• Coincidence of Wants - Direct peer-to-peer matching for better prices
• Quote API - Get swap quotes (free, no authentication)
• Order Management - Create, query, and cancel orders
• Trade History - Query executed trades
• Multi-chain - Supports Ethereum, Gnosis Chain, and Arbitrum

Installation

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

Quick Start

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

#[tokio::main]
async fn main() -> Result<(), cowp::Error> {
    let client = Client::new()?;

    // Get a sell quote (exact input)
    let request = QuoteRequest::sell(
        "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", // WETH
        "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", // USDC
        "1000000000000000000", // 1 WETH
        "0xYourAddress",
    );

    let quote = client.get_quote(None, &request).await?;
    println!("Output: {} USDC", quote.quote.buy_amount);
    println!("Fee: {} WETH", quote.quote.fee_amount);

    Ok(())
}

Buy Orders (Exact Output)

use cowp::{Client, QuoteRequest};

let request = QuoteRequest::buy(
    "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2", // WETH
    "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48", // USDC
    "1000000000", // Want exactly 1000 USDC
    "0xYourAddress",
);

let quote = client.get_quote(None, &request).await?;
println!("You will pay: {} WETH", quote.quote.sell_amount);

Multi-Chain Support

License

MIT