grpc-js: Enable the noUnusedLocals TypeScript compiler option

packages/grpc-js/src/channel-credentials.ts

@@ -38,14 +38,6 @@ export type CheckServerIdentityCallback = (
   cert: PeerCertificate
 ) => Error | undefined;
 
-function bufferOrNullEqual(buf1: Buffer | null, buf2: Buffer | null) {
-  if (buf1 === null && buf2 === null) {
-    return true;
-  } else {
-    return buf1 !== null && buf2 !== null && buf1.equals(buf2);
-  }
-}
-
 /**
  * Additional peer verification options that can be set when creating
  * SSL credentials.

packages/grpc-js/src/client-interceptors.ts

@@ -32,7 +32,6 @@ import {
 import { Status } from './constants';
 import { Channel } from './channel';
 import { CallOptions } from './client';
-import { CallCredentials } from './call-credentials';
 import { ClientMethodDefinition } from './make-client';
 import { getErrorMessage } from './error';
 

packages/grpc-js/src/compression-filter.ts

@@ -282,7 +282,7 @@ export class CompressionFilter extends BaseFilter implements Filter {
 export class CompressionFilterFactory
   implements FilterFactory<CompressionFilter> {
     private sharedFilterConfig: SharedCompressionFilterConfig = {};
-  constructor(private readonly channel: Channel, private readonly options: ChannelOptions) {}
+  constructor(channel: Channel, private readonly options: ChannelOptions) {}
   createFilter(): CompressionFilter {
     return new CompressionFilter(this.options, this.sharedFilterConfig);
   }

packages/grpc-js/src/index.ts

@@ -43,9 +43,7 @@ import {
   loadPackageDefinition,
   makeClientConstructor,
   MethodDefinition,
-  ProtobufTypeDefinition,
   Serialize,
-  ServiceClientConstructor,
   ServiceDefinition,
 } from './make-client';
 import { Metadata, MetadataOptions, MetadataValue } from './metadata';

packages/grpc-js/src/internal-channel.ts

@@ -20,7 +20,7 @@ import { ChannelOptions } from './channel-options';
 import { ResolvingLoadBalancer } from './resolving-load-balancer';
 import { SubchannelPool, getSubchannelPool } from './subchannel-pool';
 import { ChannelControlHelper } from './load-balancer';
-import { UnavailablePicker, Picker, PickResultType } from './picker';
+import { UnavailablePicker, Picker } from './picker';
 import { Metadata } from './metadata';
 import { Status, LogVerbosity, Propagate } from './constants';
 import { FilterStackFactory } from './filter-stack';
@@ -31,22 +31,19 @@ import {
   getDefaultAuthority,
   mapUriDefaultScheme,
 } from './resolver';
-import { trace, log } from './logging';
+import { trace } from './logging';
 import { SubchannelAddress } from './subchannel-address';
 import { MaxMessageSizeFilterFactory } from './max-message-size-filter';
 import { mapProxyName } from './http_proxy';
-import { GrpcUri, parseUri, splitHostPort, uriToString } from './uri-parser';
+import { GrpcUri, parseUri, uriToString } from './uri-parser';
 import { ServerSurfaceCall } from './server-call';
-import { Filter } from './filter';
 
 import { ConnectivityState } from './connectivity-state';
 import { ChannelInfo, ChannelRef, ChannelzCallTracker, ChannelzChildrenTracker, ChannelzTrace, registerChannelzChannel, SubchannelRef, unregisterChannelzRef } from './channelz';
-import { Subchannel } from './subchannel';
 import { LoadBalancingCall } from './load-balancing-call';
 import { CallCredentials } from './call-credentials';
-import { Call, CallStreamOptions, InterceptingListener, MessageContext, StatusObject } from './call-interface';
-import { SubchannelCall } from './subchannel-call';
-import { Deadline, deadlineToString, getDeadlineTimeoutString } from './deadline';
+import { Call, CallStreamOptions, StatusObject } from './call-interface';
+import { Deadline, deadlineToString } from './deadline';
 import { ResolvingCall } from './resolving-call';
 import { getNextCallNumber } from './call-number';
 import { restrictControlPlaneStatusCode } from './control-plane-status';

packages/grpc-js/src/load-balancer-outlier-detection.ts

@@ -20,11 +20,9 @@ import { ConnectivityState } from "./connectivity-state";
 import { LogVerbosity, Status } from "./constants";
 import { durationToMs, isDuration, msToDuration } from "./duration";
 import { ChannelControlHelper, createChildChannelControlHelper, registerLoadBalancerType } from "./experimental";
-import { BaseFilter, Filter, FilterFactory } from "./filter";
 import { getFirstUsableConfig, LoadBalancer, LoadBalancingConfig, validateLoadBalancingConfig } from "./load-balancer";
 import { ChildLoadBalancerHandler } from "./load-balancer-child-handler";
-import { PickArgs, Picker, PickResult, PickResultType, QueuePicker, UnavailablePicker } from "./picker";
-import { Subchannel } from "./subchannel";
+import { PickArgs, Picker, PickResult, PickResultType } from "./picker";
 import { SubchannelAddress, subchannelAddressToString } from "./subchannel-address";
 import { BaseSubchannelWrapper, ConnectivityStateListener, SubchannelInterface } from "./subchannel-interface";
 import * as logging from './logging';

packages/grpc-js/src/load-balancer.ts

@@ -16,7 +16,6 @@
  */
 
 import { ChannelOptions } from './channel-options';
-import { Subchannel } from './subchannel';
 import { SubchannelAddress } from './subchannel-address';
 import { ConnectivityState } from './connectivity-state';
 import { Picker } from './picker';

packages/grpc-js/src/load-balancing-call.ts

@@ -21,7 +21,6 @@ import { SubchannelCall } from "./subchannel-call";
 import { ConnectivityState } from "./connectivity-state";
 import { LogVerbosity, Status } from "./constants";
 import { Deadline, getDeadlineTimeoutString } from "./deadline";
-import { FilterStack, FilterStackFactory } from "./filter-stack";
 import { InternalChannel } from "./internal-channel";
 import { Metadata } from "./metadata";
 import { PickResultType } from "./picker";
@@ -48,7 +47,6 @@ export class LoadBalancingCall implements Call {
   private readPending = false;
   private pendingMessage: {context: MessageContext, message: Buffer} | null = null;
   private pendingHalfClose = false;
-  private pendingChildStatus: StatusObject | null = null;
   private ended = false;
   private serviceUrl: string;
   private metadata: Metadata | null = null;

packages/grpc-js/src/max-message-size-filter.ts

@@ -29,7 +29,7 @@ export class MaxMessageSizeFilter extends BaseFilter implements Filter {
   private maxSendMessageSize: number = DEFAULT_MAX_SEND_MESSAGE_LENGTH;
   private maxReceiveMessageSize: number = DEFAULT_MAX_RECEIVE_MESSAGE_LENGTH;
   constructor(
-    private readonly options: ChannelOptions
+    options: ChannelOptions
   ) {
     super();
     if ('grpc.max_send_message_length' in options) {

packages/grpc-js/src/metadata.ts

@@ -229,11 +229,6 @@ export class Metadata {
     return result;
   }
 
-  // For compatibility with the other Metadata implementation
-  private _getCoreRepresentation() {
-    return this.internalRepr;
-  }
-
   /**
    * This modifies the behavior of JSON.stringify to show an object
    * representation of the metadata map.

packages/grpc-js/src/object-stream.ts

@@ -15,7 +15,7 @@
  *
  */
 
-import { Duplex, Readable, Writable } from 'stream';
+import { Readable, Writable } from 'stream';
 import { EmitterAugmentation1 } from './events';
 
 /* eslint-disable @typescript-eslint/no-explicit-any */

packages/grpc-js/src/resolver-ip.ts

@@ -42,7 +42,7 @@ class IpResolver implements Resolver {
   private addresses: SubchannelAddress[] = [];
   private error: StatusObject | null = null;
   constructor(
-    private target: GrpcUri,
+    target: GrpcUri,
     private listener: ResolverListener,
     channelOptions: ChannelOptions
   ) {

packages/grpc-js/src/resolving-call.ts

@@ -18,7 +18,7 @@
 import { CallCredentials } from "./call-credentials";
 import { Call, CallStreamOptions, InterceptingListener, MessageContext, StatusObject } from "./call-interface";
 import { LogVerbosity, Propagate, Status } from "./constants";
-import { Deadline, deadlineToString, getDeadlineTimeoutString, getRelativeTimeout, minDeadline } from "./deadline";
+import { Deadline, deadlineToString, getRelativeTimeout, minDeadline } from "./deadline";
 import { FilterStack, FilterStackFactory } from "./filter-stack";
 import { InternalChannel } from "./internal-channel";
 import { Metadata } from "./metadata";

packages/grpc-js/src/resolving-load-balancer.ts

@@ -36,7 +36,6 @@ import { SubchannelAddress } from './subchannel-address';
 import { GrpcUri, uriToString } from './uri-parser';
 import { ChildLoadBalancerHandler } from './load-balancer-child-handler';
 import { ChannelOptions } from './channel-options';
-import { PickFirstLoadBalancingConfig } from './load-balancer-pick-first';
 
 const TRACER_NAME = 'resolving_load_balancer';
 
@@ -44,8 +43,6 @@ function trace(text: string): void {
   logging.trace(LogVerbosity.DEBUG, TRACER_NAME, text);
 }
 
-const DEFAULT_LOAD_BALANCER_NAME = 'pick_first';
-
 function getDefaultConfigSelector(
   serviceConfig: ServiceConfig | null
 ): ConfigSelector {
@@ -137,7 +134,7 @@ export class ResolvingLoadBalancer implements LoadBalancer {
   constructor(
     private readonly target: GrpcUri,
     private readonly channelControlHelper: ChannelControlHelper,
-    private readonly channelOptions: ChannelOptions,
+    channelOptions: ChannelOptions,
     private readonly onSuccessfulResolution: ResolutionCallback,
     private readonly onFailedResolution: ResolutionFailureCallback
   ) {

packages/grpc-js/src/server-call.ts

@@ -268,6 +268,9 @@ export class ServerDuplexStreamImpl<RequestType, ResponseType>
   implements ServerDuplexStream<RequestType, ResponseType>
 {
   cancelled: boolean;
+  /* This field appears to be unsued, but it is actually used in _final, which is assiged from
+   * ServerWritableStreamImpl.prototype._final below. */
+  // @ts-ignore noUnusedLocals
   private trailingMetadata: Metadata;
 
   constructor(
@@ -419,7 +422,7 @@ export class Http2ServerCallStream<
   constructor(
     private stream: http2.ServerHttp2Stream,
     private handler: Handler<RequestType, ResponseType>,
-    private options: ChannelOptions
+    options: ChannelOptions
   ) {
     super();
 

packages/grpc-js/src/server.ts

@@ -141,10 +141,6 @@ interface ChannelzSessionInfo {
   lastMessageReceivedTimestamp: Date | null;
 }
 
-interface ChannelzListenerInfo {
-  ref: SocketRef;
-}
-
 export class Server {
   private http2ServerList: { server: (http2.Http2Server | http2.Http2SecureServer), channelzRef: SocketRef }[] = [];
 

packages/grpc-js/src/subchannel-call.ts

@@ -23,19 +23,11 @@ import { Metadata } from './metadata';
 import { StreamDecoder } from './stream-decoder';
 import * as logging from './logging';
 import { LogVerbosity } from './constants';
-import { ServerSurfaceCall } from './server-call';
-import { Deadline } from './deadline';
 import { InterceptingListener, MessageContext, StatusObject, WriteCallback } from './call-interface';
 import { CallEventTracker, Transport } from './transport';
 
 const TRACER_NAME = 'subchannel_call';
 
-const {
-  HTTP2_HEADER_STATUS,
-  HTTP2_HEADER_CONTENT_TYPE,
-  NGHTTP2_CANCEL,
-} = http2.constants;
-
 /**
  * https://nodejs.org/api/errors.html#errors_class_systemerror
  */

packages/grpc-js/src/transport.ts

@@ -46,10 +46,6 @@ const {
   HTTP2_HEADER_USER_AGENT,
 } = http2.constants;
 
-/* setInterval and setTimeout only accept signed 32 bit integers. JS doesn't
- * have a constant for the max signed 32 bit integer, so this is a simple way
- * to calculate it */
-const KEEPALIVE_MAX_TIME_MS = ~(1 << 31);
 const KEEPALIVE_TIMEOUT_MS = 20000;
 
 export interface CallEventTracker {
@@ -108,11 +104,6 @@ class Http2Transport implements Transport {
   // Channelz info
   private channelzRef: SocketRef;
   private readonly channelzEnabled: boolean = true;
-  /**
-   * Name of the remote server, if it is not the same as the subchannel
-   * address, i.e. if connecting through an HTTP CONNECT proxy.
-   */
-  private remoteName: string | null = null;
   private streamTracker = new ChannelzCallTracker();
   private keepalivesSent = 0;
   private messagesSent = 0;
@@ -123,7 +114,12 @@ class Http2Transport implements Transport {
   constructor(
     private session: http2.ClientHttp2Session,
     subchannelAddress: SubchannelAddress,
-    options: ChannelOptions
+    options: ChannelOptions,
+    /**
+     * Name of the remote server, if it is not the same as the subchannel
+     * address, i.e. if connecting through an HTTP CONNECT proxy.
+     */
+    private remoteName: string | null
   ) {
     // Build user-agent string.
     this.userAgent = [
@@ -596,7 +592,7 @@ export class Http2SubchannelConnector implements SubchannelConnector {
       session.unref();
       session.once('connect', () => {
         session.removeAllListeners();
-        resolve(new Http2Transport(session, address, options));
+        resolve(new Http2Transport(session, address, options, remoteName));
         this.session = null;
       });
       session.once('close', () => {

packages/grpc-js/test/test-call-propagation.ts

@@ -165,7 +165,6 @@ describe('Call propagation', () => {
   describe('Deadlines', () => {
     it('should work with unary requests', (done) => {
       done = multiDone(done, 2);
-      let call: grpc.ClientUnaryCall;
       proxyServer.addService(Client.service, {
         unary: (parent: grpc.ServerUnaryCall<any, any>, callback: grpc.sendUnaryData<any>) => {
           client.unary(parent.request, {parent: parent, propagate_flags: grpc.propagate.DEADLINE}, (error: grpc.ServiceError, value: unknown) => {
@@ -178,7 +177,7 @@ describe('Call propagation', () => {
       });
       const deadline = new Date();
       deadline.setMilliseconds(deadline.getMilliseconds() + 100);
-      call = proxyClient.unary({}, {deadline}, (error: grpc.ServiceError, value: unknown) => {
+      proxyClient.unary({}, {deadline}, (error: grpc.ServiceError, value: unknown) => {
         assert(error);
         assert.strictEqual(error.code, grpc.status.DEADLINE_EXCEEDED);
         done();
@@ -186,7 +185,6 @@ describe('Call propagation', () => {
     });
     it('Should work with client streaming requests', (done) => {
       done = multiDone(done, 2);
-      let call: grpc.ClientWritableStream<unknown>;
       proxyServer.addService(Client.service, {
         clientStream: (parent: grpc.ServerReadableStream<any, any>, callback: grpc.sendUnaryData<any>) => {
           client.clientStream({parent: parent, propagate_flags: grpc.propagate.DEADLINE}, (error: grpc.ServiceError, value: unknown) => {
@@ -199,7 +197,7 @@ describe('Call propagation', () => {
       });
       const deadline = new Date();
       deadline.setMilliseconds(deadline.getMilliseconds() + 100);
-      call = proxyClient.clientStream({deadline, propagate_flags: grpc.propagate.DEADLINE}, (error: grpc.ServiceError, value: unknown) => {
+      proxyClient.clientStream({deadline, propagate_flags: grpc.propagate.DEADLINE}, (error: grpc.ServiceError, value: unknown) => {
         assert(error);
         assert.strictEqual(error.code, grpc.status.DEADLINE_EXCEEDED);
         done();

packages/grpc-js/test/test-channel-credentials.ts

@@ -19,14 +19,11 @@ import * as assert from 'assert';
 import * as fs from 'fs';
 import * as path from 'path';
 import { promisify } from 'util';
-import * as protoLoader from '@grpc/proto-loader';
 
 import { CallCredentials } from '../src/call-credentials';
 import { ChannelCredentials } from '../src/channel-credentials';
 import * as grpc from '../src';
 import { ServiceClient, ServiceClientConstructor } from '../src/make-client';
-import { TestServiceClient, TestServiceHandlers } from './generated/TestService';
-import { ProtoGrpcType as TestServiceGrpcType } from './generated/test_service';
 
 import { assert2, loadProtoFile, mockFunction } from './common';
 import { sendUnaryData, ServerUnaryCall, ServiceError } from '../src';

packages/grpc-js/test/test-channelz.ts

@@ -21,8 +21,6 @@ import * as grpc from '../src';
 
 import { ProtoGrpcType } from '../src/generated/channelz'
 import { ChannelzClient } from '../src/generated/grpc/channelz/v1/Channelz';
-import { Channel__Output } from '../src/generated/grpc/channelz/v1/Channel';
-import { Server__Output } from '../src/generated/grpc/channelz/v1/Server';
 import { ServiceClient, ServiceClientConstructor } from '../src/make-client';
 import { loadProtoFile } from './common';
 

packages/grpc-js/test/test-deadline.ts

@@ -19,14 +19,10 @@ import * as assert from 'assert';
 
 import * as grpc from '../src';
 import { experimental } from '../src';
-import { ServerCredentials } from '../src';
 import { ServiceClient, ServiceClientConstructor } from '../src/make-client';
 import { loadProtoFile } from './common';
 import ServiceConfig = experimental.ServiceConfig;
 
-const clientInsecureCreds = grpc.credentials.createInsecure();
-const serverInsecureCreds = ServerCredentials.createInsecure();
-
 const TIMEOUT_SERVICE_CONFIG: ServiceConfig = {
   loadBalancingConfig: [],
   methodConfig: [{

packages/grpc-js/test/test-outlier-detection.ts

@@ -20,7 +20,6 @@ import * as path from 'path';
 import * as grpc from '../src';
 import { loadProtoFile } from './common';
 import { OutlierDetectionLoadBalancingConfig } from '../src/load-balancer-outlier-detection'
-import { ServiceClient } from '../src/make-client';
 
 function multiDone(done: Mocha.Done, target: number) {
   let count = 0;

packages/grpc-js/test/test-server.ts

@@ -686,7 +686,7 @@ describe('Compressed requests', () => {
     },
 
     ServerStream(call) {
-      const { metadata, request } = call;
+      const { request } = call;
 
       for (let i = 0; i < 5; i++) {
         call.write({ count: request.message.length });

packages/grpc-js/tsconfig.json

@@ -7,7 +7,8 @@
     "module": "commonjs",
     "resolveJsonModule": true,
     "incremental": true,
-    "types": ["mocha"]
+    "types": ["mocha"],
+    "noUnusedLocals": true
   },
   "include": [
     "src/**/*.ts",