Chains

npm install @pancakeswap/chains

import { ChainId, chainNames, testnetChainIds } from '@pancakeswap/chains'
 
// Use chain IDs
const bscId = ChainId.BSC             // 56
const ethId = ChainId.ETHEREUM        // 1
const arbId = ChainId.ARBITRUM_ONE    // 42161
 
// Human-readable name
console.log(chainNames[ChainId.BASE]) // "base"
 
// Check for testnet
if (testnetChainIds.includes(chainId)) {
  console.warn('Connected to a testnet')
}