How to Interact with the 1inch Swap API Using Python

1inch is a leading decentralized exchange (DEX) aggregator that optimizes swap rates by routing trades across multiple liquidity sources. Its Swap API enables developers to integrate programmatic trading into applications. This guide demonstrates how to use a Python wrapper to interact with the 1inch API efficiently.

Prerequisites

• Python 3.7+ installed
• An Ethereum wallet address
• Basic familiarity with decentralized finance (DeFi) concepts

Installation and Setup

Install the Python Package

Run the following command to install the wrapper:

pip install 1inch.py

Import the Package

from oneinch_py import OneInchSwap

Initialize the Swap Instance

your_wallet_address = "0xSomeETHAddress"
chain = "ethereum"  # Supported chains: "ethereum", "polygon", "binance", etc.
exchange = OneInchSwap(your_wallet_address, chain)

Core Functionalities

1. Health Check

Verify the API status:

exchange.health_check()  # Output: 'OK'

2. Token Approvals

Get Spender Address

exchange.get_spender()

Generate Approval Data

# For unlimited allowance
exchange.get_approve("USDT")

# For a specific amount (e.g., 100 USDT)
exchange.get_approve("0xdAC17F958D2ee523a2206206994597C13D831ec7", amount=100)

Check Allowance

exchange.get_allowance("USDT")

3. Token Management

Access the in-memory token list:

exchange.tokens

4. Get Quote

Retrieve exchange rates between tokens:

quote = exchange.get_quote(from_token_symbol='ETH', to_token_symbol='USDT', amount=1)
print(quote)

5. Execute Swaps

Generate swap data with optional slippage tolerance:

swap_data = exchange.get_swap(
    from_token_symbol='ETH',
    to_token_symbol='USDT',
    amount=1,
    slippage=0.5
)
print(swap_data)

Key Features

• Full API Coverage: Supports all 1inch-aggregated chains.
• Intuitive Syntax: Simplified methods for approvals, quotes, and swaps.
• Extensible: Future updates will include transaction helpers and limit-order API support.

FAQ Section

Q1: Which blockchains does the 1inch API support?

The API supports Ethereum, Polygon, Binance Smart Chain, Avalanche, and others. Chain names are specified in lowercase (e.g., "ethereum").

Q2: How do I handle transaction gas fees?

Gas fees are included in the swap response under tx.gasPrice. Use this to estimate costs before submitting transactions.

Q3: What if I encounter an API error?

First, run health_check(). If issues persist, consult the 1inch API documentation or file an issue on the wrapper's GitHub.

👉 For advanced DeFi strategies, explore limit orders or liquidity provision tools.

👉 Need help? Connect with the community via Telegram.

Best Practices

• Monitor Slippage: Adjust slippage tolerance based on market volatility.
• Testnet First: Experiment on testnets (e.g., Goerli) before live deployments.
• Secure Approvals: Always review token allowances to minimize risks.

By leveraging this Python wrapper, you can streamline DeFi integrations while focusing on building scalable applications. For updates, star the GitHub repository!