3 files changed, 5 insertions, 5 deletions
diff --git a/packages/subproviders/src/subproviders/ganache.ts b/packages/subproviders/src/subproviders/ganache.ts
index 73d0513cc..61b6bb5e9 100644
--- a/packages/subproviders/src/subproviders/ganache.ts
+++ b/packages/subproviders/src/subproviders/ganache.ts
@@ -28,7 +28,7 @@ export class GanacheSubprovider extends Subprovider {
      * @param end Callback to call if subprovider handled the request and wants to pass back the request.
      */
     // tslint:disable-next-line:prefer-function-over-method async-suffix
-    public async handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback): Promise<void> {
+    public async handleRequest(payload: JSONRPCRequestPayload, _next: Callback, end: ErrorCallback): Promise<void> {
         this._ganacheProvider.sendAsync(payload, (err: Error | null, result: any) => {
             end(err, result && result.result);
         });
diff --git a/packages/subproviders/src/subproviders/nonce_tracker.ts b/packages/subproviders/src/subproviders/nonce_tracker.ts
index 98773e79c..dcc421574 100644
--- a/packages/subproviders/src/subproviders/nonce_tracker.ts
+++ b/packages/subproviders/src/subproviders/nonce_tracker.ts
@@ -75,7 +75,7 @@ export class NonceTrackerSubprovider extends Subprovider {
                     return next();
                 }
             case 'eth_sendRawTransaction':
-                return next((sendTransactionError: Error | null, txResult: any, cb: Callback) => {
+                return next((sendTransactionError: Error | null, _txResult: any, cb: Callback) => {
                     if (_.isNull(sendTransactionError)) {
                         this._handleSuccessfulTransaction(payload);
                     } else {
diff --git a/packages/subproviders/src/subproviders/subprovider.ts b/packages/subproviders/src/subproviders/subprovider.ts
index 329bf7d9c..ff8378c4e 100644
--- a/packages/subproviders/src/subproviders/subprovider.ts
+++ b/packages/subproviders/src/subproviders/subprovider.ts
@@ -1,5 +1,5 @@
 import { promisify } from '@0xproject/utils';
-import { JSONRPCRequestPayload, JSONRPCResponsePayload } from 'ethereum-types';
+import { JSONRPCRequestPayload, JSONRPCResponsePayload, Provider } from 'ethereum-types';
 
 import { Callback, ErrorCallback, JSONRPCRequestPayloadWithMethod } from '../types';
 /**
@@ -8,7 +8,7 @@ import { Callback, ErrorCallback, JSONRPCRequestPayloadWithMethod } from '../typ
  */
 export abstract class Subprovider {
     // tslint:disable-next-line:underscore-private-and-protected
-    private engine: any;
+    private engine!: Provider;
     // Ported from: https://github.com/MetaMask/provider-engine/blob/master/util/random-id.js
     private static _getRandomId(): number {
         const extraDigits = 3;
@@ -56,7 +56,7 @@ export abstract class Subprovider {
      * This is only called within the ProviderEngine source code, do not call
      * directly.
      */
-    public setEngine(engine: any): void {
+    public setEngine(engine: Provider): void {
         this.engine = engine;
     }
 }