declare module 'web3-provider-engine/subproviders/cache' {
  import CacheSubprovider from 'web3-provider-engine/subproviders/cache';
  export default CacheSubprovider;
}

declare module 'web3-provider-engine/subproviders/fixture' {
  import FixtureSubprovider from 'web3-provider-engine/subproviders/fixture';
  export default FixtureSubprovider;
}

declare module 'web3-provider-engine/subproviders/filters' {
  import FilterSubprovider from 'web3-provider-engine/subproviders/filters';
  export default FilterSubprovider;
}

declare module 'web3-provider-engine/subproviders/hooked-wallet' {
  import HookedWalletSubprovider from 'web3-provider-engine/subproviders/hooked-wallet';
  export default HookedWalletSubprovider;
}

declare module 'web3-provider-engine/subproviders/nonce-tracker' {
  import NonceSubprovider from 'web3-provider-engine/subproviders/nonce-tracker';
  export default NonceSubprovider;
}

declare module 'web3-provider-engine/subproviders/subscriptions' {
  import SubscriptionsSubprovider from 'web3-provider-engine/subproviders/subscriptions';
  export default SubscriptionsSubprovider;
}