Polygon setup

import { polygon, polygonAmoy } from 'wagmi/chains'
import { useSwitchChain, useAccount } from 'wagmi'

function NetworkSwitcher() {
  const { chain } = useAccount()
  const { switchChain } = useSwitchChain()

  const switchToPolygon = async () => {
    await switchChain({ chainId: polygon.id })
  }

  return (
    <div>
      <p>Current network: {chain?.name}</p>
      <button onClick={switchToPolygon}>Switch to Polygon</button>
    </div>
  )
}

import { ethers } from 'ethers'

const polygonNetwork = {
  chainId: 137,
  name: 'Polygon',
  rpcUrls: ['https://polygon-rpc.com'],
  nativeCurrency: {
    name: 'POL',
    symbol: 'POL',
    decimals: 18,
  },
  blockExplorerUrls: ['https://polygonscan.com'],
}

// Add network to wallet
await window.ethereum.request({
  method: 'wallet_addEthereumChain',
  params: [polygonNetwork],
})

import Web3 from 'web3'

const web3 = new Web3('https://polygon-rpc.com')
const chainId = await web3.eth.getChainId()

console.log('Connected to chain:', chainId) // 137

const publicRpcs = [
  'https://polygon-rpc.com',
  'https://rpc-mainnet.polygon.technology',
  'https://polygon-bor.publicnode.com',
]

import { createPublicClient, http } from 'viem'
import { polygon } from 'viem/chains'

const client = createPublicClient({
  chain: polygon,
  transport: http('https://polygon-mainnet.g.alchemy.com/v2/YOUR-API-KEY'),
})

import { publicClient } from '@/lib/wagmi'

export async function checkNetworkHealth() {
  const [blockNumber, gasPrice, chainId] = await Promise.all([
    publicClient.getBlockNumber(),
    publicClient.getGasPrice(),
    publicClient.getChainId(),
  ])

  console.log('Block number:', blockNumber)
  console.log('Gas price:', gasPrice)
  console.log('Chain ID:', chainId)

  // Check if network is responsive
  if (blockNumber === 0n) {
    throw new Error('Network not responding')
  }
}