How to use the ethers.providers function in ethers

before("Setting up ethers wallet provider", async function() {
    this.timeout(10000);
    const ganacheOptions = {
      accounts: [
        {
          secretKey: `0x${secretKey}`,
          balance: `0x${new BN("1000000000000000000000").toString("hex")}`
        }
      ]
    };

    const { provider } = await intializeTestProvider(ganacheOptions);

    ethersProvider = new ethers.providers.Web3Provider(provider);
    const privateKey = Buffer.from(secretKey, "hex");
    wallet = new ethers.Wallet(privateKey);
    gasPrice = 20 * 10 ** 9; // 20000000000
    value = `0x${new BN(10).pow(new BN(18)).toString("hex")}`;
  });

const [ account ] = await provider.listAccounts()

      console.log(`Signer account: ${account}`)

      signer = provider.getSigner(account)
    } catch (err) {
      console.warn(`Unable to connect via Web3 provider`, err)
    }
  } else {
    console.log('No web3? You should consider trying MetaMask!')
  }

  if (!provider) {
    try {
      // Allow read-only access to the blockchain if no Mist/Metamask/EthersWallet
      provider = ethers.providers.getDefaultProvider(expectedNetwork)

      networkId = provider.chainId

      // check that it works!
      await provider.getBlockNumber()
    } catch (err) {
      networkError = `We were unable to connect to the Ethereum network: ${expectedNetwork || 'local'}`

      return console.error(networkError)
    }
  }
}

const run = async function (inputParams, inputPort) {
	// set the port for running the provider of the debugger
	port = inputPort;

	// set the provider with the desired port
	provider = new ethers.providers.JsonRpcProvider(`http://localhost:${port}`);

	//add custom inspect options for BNs
	BN.prototype[util.inspect.custom] = function (depth, inputParams) {
		return inputParams.stylize(this.toString(), "number");
	};

	console.log(DebugUtils.formatStartMessage());

	return new Promise(async (resolve, reject) => {
		txHash = inputParams;
		try {
			const compileResult = await compileAllContracts(config);
			const debuggerConfig = {
				provider: provider,
				files: compileResult.files,
				contracts: Object.keys(compileResult.contracts).map(function (name) {

    let accounts = Array(num).fill(null).map((_, i) => ethers.Wallet.createRandom().connect(new ethers.providers.JsonRpcProvider(rpcProviders[i % rpcProviders.length])))
    // Fund the accounts

const gasPrice =
    ethers.utils.parseUnits(process.env.GAS_PRICE.toString(), 'gwei') ||
    ethers.utils.parseUnits('5', 'gwei')

  if (!validNetworks.includes(network)) {
    console.log(chalk.red(`invalid network! network given is: ${network}`))
  }

  const mnemonic = process.env.MNEMONIC
  if (!mnemonic) {
    console.log(chalk.red('no mnemonic supplied!'))
  }

  const provider =
    network === 'private'
      ? new ethers.providers.JsonRpcProvider('http://localhost:8545')
      : new ethers.getDefaultProvider(network)
  const wallet = new ethers.Wallet.fromMnemonic(mnemonic).connect(provider)

  console.log(chalk.cyan('deployment environment setup complete'))
  console.log(chalk.yellow('getting blockNumber deployment start...'))

  const deploymentBlock = await provider.getBlockNumber()

  console.log(chalk.cyan(`got current block: ${deploymentBlock}`))

  console.log(chalk.yellow('setting up weddingMaster...'))

  const wngMaster = await new ethers.ContractFactory(
    wngAbi,
    wngCode,
    wallet

constructor(privateKey, network, apiKey, defaultOverrides) {
		const infuraProvider = new ethers.providers.InfuraProvider(ethers.providers.networks[network], apiKey);
		super(privateKey, infuraProvider, defaultOverrides);
		console.log(`Deployer set to Infura. Network: ${colors.colorNetwork(network)} with API Key: ${colors.colorAPIKey(apiKey)}\n`)
		this.network = network;
		this.apiKey = apiKey;
	}

return dispatch => {
    dispatch(requestMerkleRoot());
    return new ethers
      .Contract(
        process.env.MIXIMUS_ADDR,
        require("./roll_up.json").abi,
        new ethers.providers.JsonRpcProvider(process.env.ETHEREUM_JSONRPC_URL)
      )
      .functions
      .getRoot()
      .then(merkleRoot => dispatch(receiveMerkleRoot(merkleRoot)));
  };
};

var ethers = require('ethers');
const {shell} = require('electron')
const {dialog} = require('electron').remote
const clipboardy = require('clipboardy');
var fs = require('fs');

var providers = ethers.providers;
var Wallet = ethers.Wallet;

var myWallet;

var tokenBalance = 0;
var ethBalance = 0;
var version = "0.0.1";

var storjUSD = 0;
var etherUSD = 0;

var provider = new providers.EtherscanProvider(false);

var tokenContract;
var TOKEN_ADDRESS = '0xB64ef51C888972c908CFacf59B47C1AfBC0Ab8aC'
const TOKEN_ABI = [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"burnAmount","type":"uint256"}],"name":"burn","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"value","type":"uint256"}],"name":"upgrade","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"upgradeAgent","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"upgradeMaster","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"getUpgradeState","outputs":[{"name":"","type":"uint8"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"canUpgrade","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalUpgraded","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"agent","type":"address"}],"name":"setUpgradeAgent","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"isToken","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"BURN_ADDRESS","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"master","type":"address"}],"name":"setUpgradeMaster","outputs":[],"payable":false,"type":"function"},{"inputs":[{"name":"_owner","type":"address"},{"name":"_name","type":"string"},{"name":"_symbol","type":"string"},{"name":"_totalSupply","type":"uint256"},{"name":"_decimals","type":"uint256"}],"payable":false,"type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Upgrade","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"agent","type":"address"}],"name":"UpgradeAgentSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"burner","type":"address"},{"indexed":false,"name":"burnedAmount","type":"uint256"}],"name":"Burned","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"}];

const ProviderEngine = function(fallbackURL, providers) {
    this.lastId = 0;
    if(fallbackURL) {
        this.fallbackProvider = new ethers.providers.JsonRpcProvider(fallbackURL);
    }
    this.providers = providers || [];
    for(let i = 0; i < providers.length; i++) {
        providers[i].setEngine(this);
    }
}

constructor(props) {
	super(props);
	this.state = {
	    view: 'login',
	    username: '',
	    error: null
	};
	this.provider = new ethers.providers.JsonRpcProvider('http://localhost:18545');
	this.sdk = new EthereumIdentitySDK('http://localhost:3311', this.provider);
    }