Smart Contract Integration Guide: DEX Router & Token Approval Addresses

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Integrating decentralized exchange (DEX) functionality into your application requires reliable access to smart contract addresses and Application Binary Interfaces (ABI). This guide provides developers with accurate, up-to-date information on OKX DEX router contracts, token approval addresses, and essential integration practices across multiple blockchain networks.

Whether you're building a wallet, DeFi aggregator, or custom trading interface, understanding how to securely interact with these contracts is crucial for seamless swaps and approvals.

Understanding the OKX DEX Router Contract

The OKX DEX router serves as the core smart contract enabling token swaps and liquidity routing across decentralized exchanges. It aggregates liquidity from various sources to ensure optimal trade execution for users.

Developers should use the contract addresses listed below to sign transactions such as swaps, approvals, and exact-output trades. These contracts are actively maintained and may be upgraded over time.

⚠️ Best Practice: To avoid disruptions due to potential contract upgrades, always retrieve the latest contract address dynamically via the /swap or /approve-transaction API responses rather than hardcoding them.

DEX Router Contract Addresses by Blockchain

Below are the current DEX router contract addresses for major blockchains supported by OKX. Use these when constructing transaction payloads or integrating swap functionality.

Standard Swap Contracts

These addresses support standard exactInput and exactOutput swap operations.

Exact Output Swap Contracts

For precise output-based trades (exactOutput), use the following router addresses:

πŸ‘‰ Discover how to integrate dynamic contract fetching for maximum reliability.

Token Approval Contract Addresses

Before executing a token swap, users must approve the DEX router to spend their ERC-20 tokens. The following addresses are used for token authorization.

πŸ“Œ Note: Chains like Ton and Solana do not require separate approval steps due to their native account models.

Supported Chains for Token Approval

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# Smart Contract Integration Guide: DEX Router & Token Approval Addresses

Integrating decentralized exchange (DEX) functionality into your application requires reliable access to smart contract addresses and Application Binary Interfaces (ABI). This guide provides developers with accurate, up-to-date information on **OKX DEX router contracts**, **token approval addresses**, and essential integration practices across multiple blockchain networks.

Whether you're building a wallet, DeFi aggregator, or custom trading interface, understanding how to securely interact with these contracts is crucial for seamless swaps and approvals.

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## Understanding the OKX DEX Router Contract

The **OKX DEX router** serves as the core smart contract enabling token swaps and liquidity routing across decentralized exchanges. It aggregates liquidity from various sources to ensure optimal trade execution for users.

Developers should use the contract addresses listed below to sign transactions such as swaps, approvals, and exact-output trades. These contracts are actively maintained and may be upgraded over time.

> ⚠️ **Best Practice**: To avoid disruptions due to potential contract upgrades, always retrieve the latest contract address dynamically via the `/swap` or `/approve-transaction` API responses rather than hardcoding them.

---

## DEX Router Contract Addresses by Blockchain

Below are the current **DEX router contract addresses** for major blockchains supported by OKX. Use these when constructing transaction payloads or integrating swap functionality.

### Standard Swap Contracts

These addresses support standard `exactInput` and `exactOutput` swap operations.

- **Ethereum**: `极
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Smart Contract Integration Guide: DEX Router & Token Approval Addresses

Integrating decentralized exchange (DEX) functionality into your application requires reliable access to smart contract addresses and Application Binary Interfaces (ABI). This guide provides developers with accurate, up-to-date information on OKX DEX router contracts, token approval addresses, and essential integration practices across multiple blockchain networks.

Whether you're building a wallet, DeFi aggregator, or custom trading interface, understanding how to securely interact with these contracts is crucial for seamless swaps and approvals. With support for Ethereum, Solana, BNB Chain, Arbitrum, and more, this resource ensures your integration remains robust and future-proof.

πŸ‘‰ Access real-time contract data through powerful API endpoints.

Understanding the OKX DEX Router Contract

The OKX DEX router is the backbone of decentralized trading operations, enabling cross-chain token swaps with optimized routing and minimal slippage. As a smart contract deployed across multiple EVM and non-EVM chains, it facilitates secure transaction execution between users' wallets and liquidity pools.

This contract supports functions such as:

Because these contracts can be upgraded to improve performance or security, developers are strongly advised against hardcoding addresses in production environments.

Instead, always fetch the current contract address dynamically using the /swap or /approve-transaction API endpoints. This ensures long-term compatibility even after backend updates.

DEX Router Contract Addresses by Blockchain Network

Below is a comprehensive list of DEX router contract addresses across supported networks. These should be used when constructing transaction calldata or verifying contract interactions.

Standard Swap Operations (exactInput)

Use these addresses for standard token swap transactions where input amount is fixed:

# Smart Contract Integration Guide: DEX Router & Token Approval Addresses

Integrating decentralized exchange (DEX) functionality into your application requires reliable access to smart contract addresses and Application Binary Interfaces (ABI). This guide provides developers with accurate, up-to-date information on OKX DEX router contracts, token approval addresses, and essential integration practices across multiple blockchain networks.

Whether you're building a wallet, DeFi aggregator, or custom trading interface, understanding how to securely interact with these contracts is crucial for seamless swaps and approvals. With support for Ethereum, Solana, BNB Chain, Arbitrum, and more, this resource ensures your integration remains robust and future-proof.

πŸ‘‰ [Access real-time contract data through powerful API endpoints.](https://www.okx.com/join/8265080)

---

## Understanding the OKX DEX Router Contract

The OKX DEX router is the backbone of decentralized trading operations, enabling cross-chain token swaps with optimized routing and minimal slippage. As a smart contract deployed across multiple EVM and non-EVM chains, it facilitates secure transaction execution between users' wallets and liquidity pools.

This contract supports functions such as:

- Exact input swaps  
- Exact output swaps  
- Multi-hop routing  
- Fee management  
- Interaction with third-party liquidity providers  

Because these contracts can be upgraded to improve performance or security, developers are strongly advised against hardcoding addresses in production environments.

Instead, always fetch the current contract address dynamically using the `/swap` or `/approve-transaction` API endpoints. This ensures long-term compatibility even after backend updates.

---

## DEX Router Contract Addresses by Blockchain Network

Below is a comprehensive list of DEX router contract addresses across supported networks. These should be used when constructing transaction calldata or verifying contract interactions.

### Standard Swap Operations (exactInput)

Use these addresses for standard token swap transactions where input amount is fixed:

- Ethereum: `极
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Smart Contract Integration Guide: DEX Router & Token Approval Addresses

Integrating decentralized exchange (DEX) functionality into your application requires reliable access to smart contract addresses and Application Binary Interfaces (ABI). This guide provides developers with accurate, up-to-date information on OKX DEX router contracts, token approval addresses, and essential integration practices across multiple blockchain networks.

Whether you're building a wallet, DeFi aggregator, or custom trading interface, understanding how to securely interact with these contracts is crucial for seamless swaps and approvals. With support for Ethereum, Solana, BNB Chain, Arbitrum, and more, this resource ensures your integration remains robust and future-proof.

πŸ‘‰ Access real-time contract data through powerful API endpoints.

Understanding the OKX DEX Router Contract

The OKX DEX router is the backbone of decentralized trading operations, enabling cross-chain token swaps with optimized routing and minimal slippage. As a smart contract deployed across multiple EVM and non-EVM chains, it facilitates secure transaction execution between users' wallets and liquidity pools.

This contract supports functions such as:

Because these contracts can be upgraded to improve performance or security, developers are strongly advised against hardcoding addresses in production environments.

Instead, always fetch the current contract address dynamically using the /swap or /approve-transaction API endpoints. This ensures long-term compatibility even after backend updates.

DEX Router Contract Addresses by Blockchain Network

Below is a comprehensive list of DEX router contract addresses across supported networks. These should be used when constructing transaction calldata or verifying contract interactions.

Standard Swap Operations (exactInput)

Use these addresses for standard token swap transactions where input amount is fixed:

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