​

Supported Networks

​

Contract Addresses

​

Mainnet Deployments

​

Ethereum Mainnet

• Chain ID: 1
• Native Token: ETH
• Block Explorer: Etherscan

​

Gnosis Chain

• Chain ID: 100
• Native Token: xDAI
• Block Explorer: Gnosisscan
• Formerly known as xDAI Chain

​

Arbitrum One

• Chain ID: 42161
• Native Token: ETH
• Block Explorer: Arbiscan
• Layer 2 optimistic rollup

​

Optimism

• Chain ID: 10
• Native Token: ETH
• Block Explorer: Optimistic Etherscan

​

Polygon

• Chain ID: 137
• Native Token: MATIC
• Block Explorer: Polygonscan

​

BNB Smart Chain

• Chain ID: 56
• Native Token: BNB
• Block Explorer: BscScan

​

Base

• Chain ID: 8453
• Native Token: ETH
• Block Explorer: Basescan
• Coinbase’s Layer 2

​

Avalanche C-Chain

• Chain ID: 43114
• Native Token: AVAX
• Block Explorer: Snowtrace

​

Testnet

​

Sepolia

• Chain ID: 11155111
• Native Token: SepoliaETH
• Block Explorer: Sepolia Etherscan
• Development and testing infrastructure with identical contract addresses

​

Integration Guidance

• Select the appropriate network for your use case
• Always verify contract addresses through official channels before integrating
• Configure corresponding RPC endpoints for your target network
• Account for each network’s native token requirements for gas
• Use the correct chain ID when constructing domain separators

import { domain } from "@cowprotocol/contracts";

// Always use the correct chain ID for your target network
const networkDomain = domain(
  chainId,
  "0x9008D19f58AAbD9eD0D60971565AA8510560ab41"
);