chains.ts

// @ts-nocheck
import type { AddEthereumChainParameter } from '@web3-react/types'

interface BasicChainInformation {
  urls: string[]
  name: string
}

interface ExtendedChainInformation extends BasicChainInformation {
  nativeCurrency: AddEthereumChainParameter['nativeCurrency']
  blockExplorerUrls: AddEthereumChainParameter['blockExplorerUrls']
}

function isExtendedChainInformation(
  chainInformation: BasicChainInformation | ExtendedChainInformation
): chainInformation is ExtendedChainInformation {
  return !!(chainInformation as ExtendedChainInformation).nativeCurrency
}

export function getAddChainParameters(chainId: number): AddEthereumChainParameter | number {
  const chainInformation = CHAINS[chainId]

  if (isExtendedChainInformation(chainInformation)) {
    return {
      chainId,
      chainName: chainInformation.name,
      nativeCurrency: chainInformation.nativeCurrency,
      rpcUrls: chainInformation.urls,
      blockExplorerUrls: chainInformation.blockExplorerUrls,
    }
  } else {
    return chainId
  }
}

export const CHAINS: { [chainId: number]: BasicChainInformation | ExtendedChainInformation } = {
  1: {
    urls: [
      process.env.infuraKey ? `https://mainnet.infura.io/v3/${process.env.infuraKey}` : undefined,
      process.env.alchemyKey ? `https://eth-mainnet.alchemyapi.io/v2/${process.env.alchemyKey}` : undefined,
      'https://cloudflare-eth.com',
    ].filter((url) => url !== undefined),
    name: 'Mainnet',
  },
  3: {
    urls: [process.env.infuraKey ? `https://ropsten.infura.io/v3/${process.env.infuraKey}` : undefined].filter(
      (url) => url !== undefined
    ),
    name: 'Ropsten',
  },
  4: {
    urls: [process.env.infuraKey ? `https://rinkeby.infura.io/v3/${process.env.infuraKey}` : undefined].filter(
      (url) => url !== undefined
    ),
    name: 'Rinkeby',
  },
  5: {
    urls: [process.env.infuraKey ? `https://goerli.infura.io/v3/${process.env.infuraKey}` : undefined].filter(
      (url) => url !== undefined
    ),
    name: 'Görli',
  },
  42: {
    urls: [process.env.infuraKey ? `https://kovan.infura.io/v3/${process.env.infuraKey}` : undefined].filter(
      (url) => url !== undefined
    ),
    name: 'Kovan',
  },
}

export const URLS: { [chainId: number]: string[] } = Object.keys(CHAINS).reduce<{ [chainId: number]: string[] }>(
  (accumulator, chainId) => {
    const validURLs: string[] = CHAINS[Number(chainId)].urls

    if (validURLs.length) {
      accumulator[Number(chainId)] = validURLs
    }

    return accumulator
  },
  {}
)