Understanding Smart Contracts in Decentralized Exchanges (DEX)
Smart contracts form the backbone of decentralized trading, enabling automated execution of limit orders without intermediaries. Below are key contract addresses for OKX DEX operations across multiple blockchain networks.
DEX Limit Order Contract Addresses
These router addresses facilitate signed transactions for limit orders on OKX DEX:
| Blockchain | DEX Router Contract Address |
|---|---|
| Ethereum | 0x2ae8947FB81f0AAd5955Baeff9Dcc7779A3e49F2 |
| Optimism | 0x2ae8947FB81f0AAd5955Baeff9Dcc7779A3e49F2 |
| Polygon | 0x2ae8947FB81f0AAd5955Baeff9Dcc7779A3e49F2 |
| BNB Chain | 0x2ae8947FB81f0AAd5955Baeff9Dcc7779A3e49F2 |
| OKC | 0x2ae8947FB81f0AAd5955Baeff9Dcc7779A3e49F2 |
| Avalanche C-Chain | 0x2ae8947FB81f0AAd5955Baeff9Dcc7779A3e49F2 |
| Fantom | 0x2ae8947FB81f0AAd5955Baeff9Dcc7779A3e49F2 |
| Arbitrum | 0x2ae8947FB81f0AAd5955Baeff9Dcc7779A3e49F2 |
Token Approval Contract Addresses
Authorize ERC-20 tokens for trading using these contract addresses:
| Blockchain | Approval Contract Address |
|---|---|
| Ethereum | 0x40aA958dd87FC8305b97f2BA922CDdCa374bcD7f |
| Optimism | 0x68D6B739D2020067D1e2F713b999dA97E4d54812 |
| Polygon | 0x3B86917369B83a6892f553609F3c2F439C184e31 |
| BNB Chain | 0x2c34A2Fb1d0b4f55de51E1d0bDEfaDDce6b7cDD6 |
| OKC | 0x70cBb871E8f30Fc8Ce23609E9E0Ea87B6b222F58 |
| Avalanche C-Chain | 0x40aA958dd87FC8305b97f2BA922CDdCa374bcD7f |
| Fantom | 0x70cBb871E8f30Fc8Ce23609E9E0Ea87B6b222F58 |
| Arbitrum | 0x70cBb871E8f30Fc8Ce23609E9E0Ea87B6b222F58 |
FAQ: Smart Contracts & DEX APIs
👉 How do I interact with DEX smart contracts?
Q: What's the purpose of a DEX router contract?
A: It processes limit order transactions by validating signatures and routing tokens between parties.
Q: Why approve tokens before trading?
A: Approval grants the DEX permission to access your tokens for swaps while maintaining custody in your wallet.
Q: Are these contracts audited?
A: Yes, all listed contracts undergo rigorous security audits before deployment.
Q: Can I use the same address across different chains?
A: No, each blockchain has unique contract addresses due to separate network architectures.
Q: How do limit orders differ from market orders?
A: Limit orders execute only at specified prices, while market orders fill immediately at current rates.
Q: What happens if a contract address changes?
A: Always verify addresses through official OKX documentation to avoid deprecated contracts.
👉 Discover advanced Web3 API features for developers
This guide provides essential references for developers building with OKX's decentralized exchange infrastructure. For real-time updates, monitor official announcements.