How to use bcfg - 4 common examples

function getConfig(options = {}) {
  // create a new config module for chainpoint
  // this will set the prefix to `~/.chainpoint`
  // and also parse env vars that are prefixed with `CHAINPOINT_`
  config = new Config('chainpoint')
  config.inject(options)
  config.load({
    // Parse URL hash
    hash: true,
    // Parse querystring
    query: true,
    // Parse environment
    env: true,
    // Parse args
    argv: true
  })

  // Will parse [PREFIX]/chainpoint.conf (throws on FS error).
  // PREFIX defaults to `~/.chainpoint`
  // can change the prefix by passing in a `prefix` option
  config.open('chainpoint.conf')

export const run = async () => {
  dotenv.config()

  const config: Bcfg = new Config('batch-submitter')
  config.load({
    env: true,
    argv: true,
  })

  // Parse config
  const env = process.env
  const environment = config.str('node-env', env.NODE_ENV)
  const network = config.str('eth-network-name', env.ETH_NETWORK_NAME)
  const release = `batch-submitter@${env.npm_package_version}`
  const sentryDsn = config.str('sentry-dsn', env.SENTRY_DSN)
  const sentryTraceRate = config.ufloat(
    'sentry-trace-rate',
    parseFloat(env.SENTRY_TRACE_RATE) || 0.05
  )

const main = async () => {
  const config: Bcfg = new Config('message-relayer')
  config.load({
    env: true,
    argv: true,
  })

  const env = process.env
  const L2_NODE_WEB3_URL = config.str('l2-node-web3-url', env.L2_NODE_WEB3_URL)
  const L1_NODE_WEB3_URL = config.str('l1-node-web3-url', env.L1_NODE_WEB3_URL)
  const ADDRESS_MANAGER_ADDRESS = config.str(
    'address-manager-address',
    env.ADDRESS_MANAGER_ADDRESS
  )
  const L1_WALLET_KEY = config.str('l1-wallet-key', env.L1_WALLET_KEY)
  const MNEMONIC = config.str('mnemonic', env.MNEMONIC)
  const HD_PATH = config.str('hd-path', env.HD_PATH)
  const RELAY_GAS_LIMIT = config.uint(

;(async () => {
  try {
    dotenv.config()

    const config: Bcfg = new Config('data-transport-layer')
    config.load({
      env: true,
      argv: true,
    })

    const service = new L1DataTransportService({
      nodeEnv: config.str('node-env', 'development'),
      ethNetworkName: config.str('eth-network-name') as ethNetwork,
      release: `data-transport-layer@${process.env.npm_package_version}`,
      dbPath: config.str('db-path', './db'),
      port: config.uint('server-port', 7878),
      hostname: config.str('server-hostname', 'localhost'),
      confirmations: config.uint('confirmations', 35),
      l1RpcProvider: config.str('l1-rpc-endpoint'),
      addressManager: config.str('address-manager'),
      pollingInterval: config.uint('polling-interval', 5000),