build: use strict null checks part 5

integration/auto-mock/test/bar.service.spec.ts

@@ -4,6 +4,7 @@ import * as chaiAsPromised from 'chai-as-promised';
 import * as sinon from 'sinon';
 import { BarService } from '../src/bar.service';
 import { FooService } from '../src/foo.service';
+
 chai.use(chaiAsPromised);
 const { expect } = chai;
 

integration/auto-mock/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/cors/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/discovery/src/webhooks.explorer.ts

@@ -17,17 +17,17 @@ export class WebhooksExplorer {
       const { name } = this.discoveryService.getMetadataByDecorator(
         Webhook,
         wrapper,
-      );
+      )!;
       return {
         name,
         handlers: this.metadataScanner
-          .getAllMethodNames(wrapper.metatype.prototype)
+          .getAllMethodNames(wrapper.metatype!.prototype)
           .map(methodName => {
             const { event } = this.discoveryService.getMetadataByDecorator(
               WebhookHandler,
               wrapper,
               methodName,
-            );
+            )!;
             return {
               methodName,
               event,

integration/discovery/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/graphql-code-first/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/graphql-schema-first/src/cats/cats-request-scoped.service.ts

@@ -20,6 +20,6 @@ export class CatsRequestScopedService {
   }
 
   findOneById(id: number): Cat {
-    return this.cats.find(cat => cat.id === id);
+    return this.cats.find(cat => cat.id === id)!;
   }
 }

integration/graphql-schema-first/src/cats/cats.service.ts

@@ -20,6 +20,6 @@ export class CatsService {
   }
 
   findOneById(id: number): Cat {
-    return this.cats.find(cat => cat.id === id);
+    return this.cats.find(cat => cat.id === id)!;
   }
 }

integration/graphql-schema-first/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/hello-world/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/hooks/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/injector/src/circular-structure-dynamic-module/circular.module.ts

@@ -6,7 +6,7 @@ export class CircularModule {
     const a = {
       module: CircularModule,
       providers: [InputService],
-      b: null,
+      b: null as any,
     };
     a.b = a;
     return a;

integration/injector/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/inspector/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/lazy-modules/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/microservices/e2e/concurrent-kafka.spec.ts

@@ -100,7 +100,7 @@ describe.skip('Kafka concurrent', function () {
       }
     }
 
-    if (topicMetadata && topicMetadata.topics.length > 0) {
+    if (topicMetadata! && topicMetadata.topics.length > 0) {
       // we have topics, how many partitions do they have?
       for (const topic of topicMetadata.topics) {
         if (topic.partitions.length < numbersOfServers) {

integration/microservices/e2e/sum-kafka.spec.ts

@@ -123,7 +123,7 @@ describe.skip('Kafka transport', function () {
   });
 
   it(`/POST (sync command create user) Concurrency Test`, async () => {
-    const promises = [];
+    const promises = [] as Array<Promise<any>>;
     for (let concurrencyKey = 0; concurrencyKey < 100; concurrencyKey++) {
       const innerUserDto = JSON.parse(JSON.stringify(userDto));
       innerUserDto.name += `+${concurrencyKey}`;

integration/microservices/src/kafka-concurrent/kafka-concurrent.controller.ts

@@ -17,7 +17,7 @@ import { SumDto } from './dto/sum.dto';
  */
 const explicitPartitioner = () => {
   return ({ message }: PartitionerArgs) => {
-    return parseFloat(message.headers.toPartition.toString());
+    return parseFloat(message.headers!.toPartition!.toString());
   };
 };
 

integration/microservices/src/mqtt/mqtt.controller.ts

@@ -138,7 +138,7 @@ export class MqttController {
   }
 
   @MessagePattern('wildcard-message/#')
-  wildcardMessageHandler(data: number[]): number {
+  wildcardMessageHandler(data: number[]): number | undefined {
     if ((data as any).response) {
       return;
     }
@@ -186,7 +186,7 @@ export class MqttController {
   }
 
   @MessagePattern('$share/test-group/shared-wildcard-message/#')
-  sharedWildcardMessageHandler(data: number[]): number {
+  sharedWildcardMessageHandler(data: number[]): number | undefined {
     if ((data as any).response) {
       return;
     }

integration/microservices/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/module-utils/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/mongoose/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/nest-application/app-locals/tsconfig.json

@@ -11,6 +11,7 @@
     "sourceMap": true,
     "allowJs": true,
     "outDir": "./dist",
+    "strictNullChecks": true,
     "paths": {
       "@nestjs/common": ["../../../packages/common"],
       "@nestjs/common/*": ["../../../packages/common/*"],

integration/nest-application/get-url/tsconfig.json

@@ -11,6 +11,7 @@
     "sourceMap": true,
     "allowJs": true,
     "outDir": "./dist",
+    "strictNullChecks": true,
     "paths": {
       "@nestjs/common": ["../../../packages/common"],
       "@nestjs/common/*": ["../../../packages/common/*"],

integration/nest-application/global-prefix/tsconfig.json

@@ -11,6 +11,7 @@
     "sourceMap": true,
     "allowJs": true,
     "outDir": "./dist",
+    "strictNullChecks": true,
     "paths": {
       "@nestjs/common": ["../../../packages/common"],
       "@nestjs/common/*": ["../../../packages/common/*"],

integration/nest-application/listen/tsconfig.json

@@ -11,6 +11,7 @@
     "sourceMap": true,
     "allowJs": true,
     "outDir": "./dist",
+    "strictNullChecks": true,
     "paths": {
       "@nestjs/common": ["../../../packages/common"],
       "@nestjs/common/*": ["../../../packages/common/*"],

integration/nest-application/raw-body/src/express.controller.ts

@@ -7,7 +7,7 @@ export class ExpressController {
   getRawBody(@Req() req: RawBodyRequest<Request>) {
     return {
       parsed: req.body,
-      raw: req.rawBody.toString(),
+      raw: req.rawBody!.toString(),
     };
   }
 }

integration/nest-application/raw-body/src/fastify.controller.ts

@@ -7,7 +7,7 @@ export class FastifyController {
   getRawBody(@Req() req: RawBodyRequest<FastifyRequest>) {
     return {
       parsed: req.body,
-      raw: req.rawBody.toString(),
+      raw: req.rawBody!.toString(),
     };
   }
 }

integration/nest-application/raw-body/tsconfig.json

@@ -11,6 +11,7 @@
     "sourceMap": true,
     "allowJs": true,
     "outDir": "./dist",
+    "strictNullChecks": true,
     "paths": {
       "@nestjs/common": ["../../../packages/common"],
       "@nestjs/common/*": ["../../../packages/common/*"],

integration/repl/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/scopes/src/durable/durable-context-id.strategy.ts

@@ -9,7 +9,7 @@ export class DurableContextIdStrategy implements ContextIdStrategy {
     let tenantSubTreeId: ContextId;
 
     if (tenants.has(tenantId)) {
-      tenantSubTreeId = tenants.get(tenantId);
+      tenantSubTreeId = tenants.get(tenantId)!;
     } else {
       tenantSubTreeId = { id: +tenantId } as ContextId;
       tenants.set(tenantId, tenantSubTreeId);

integration/scopes/src/hello/guards/request-scoped.guard.ts

@@ -10,7 +10,7 @@ import { Observable } from 'rxjs';
 @Injectable({ scope: Scope.REQUEST })
 export class Guard implements CanActivate {
   static COUNTER = 0;
-  static REQUEST_SCOPED_DATA = [];
+  static REQUEST_SCOPED_DATA = [] as number[];
 
   constructor(@Inject('REQUEST_ID') private readonly requestId: number) {
     Guard.COUNTER++;

integration/scopes/src/hello/interceptors/logging.interceptor.ts

@@ -11,7 +11,7 @@ import { Observable } from 'rxjs';
 @Injectable({ scope: Scope.REQUEST })
 export class Interceptor implements NestInterceptor {
   static COUNTER = 0;
-  static REQUEST_SCOPED_DATA = [];
+  static REQUEST_SCOPED_DATA = [] as number[];
 
   constructor(@Inject('REQUEST_ID') private readonly requestId: number) {
     Interceptor.COUNTER++;

integration/scopes/src/hello/users/user-by-id.pipe.ts

@@ -9,7 +9,7 @@ import { UsersService } from './users.service';
 @Injectable()
 export class UserByIdPipe implements PipeTransform<string> {
   static COUNTER = 0;
-  static REQUEST_SCOPED_DATA = [];
+  static REQUEST_SCOPED_DATA = [] as number[];
 
   constructor(
     @Inject('REQUEST_ID') private readonly requestId: number,

integration/scopes/src/msvc/guards/request-scoped.guard.ts

@@ -10,7 +10,7 @@ import { Observable } from 'rxjs';
 @Injectable({ scope: Scope.REQUEST })
 export class Guard implements CanActivate {
   static COUNTER = 0;
-  static REQUEST_SCOPED_DATA = [];
+  static REQUEST_SCOPED_DATA = [] as number[];
 
   constructor(@Inject('REQUEST_ID') private readonly requestId: number) {
     Guard.COUNTER++;

integration/scopes/src/msvc/interceptors/logging.interceptor.ts

@@ -11,7 +11,7 @@ import { Observable } from 'rxjs';
 @Injectable({ scope: Scope.REQUEST })
 export class Interceptor implements NestInterceptor {
   static COUNTER = 0;
-  static REQUEST_SCOPED_DATA = [];
+  static REQUEST_SCOPED_DATA = [] as number[];
 
   constructor(@Inject('REQUEST_ID') private readonly requestId: number) {
     Interceptor.COUNTER++;

integration/scopes/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/send-files/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/typeorm/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/versioning/e2e/custom-versioning-fastify.spec.ts

@@ -14,7 +14,7 @@ describe('Custom Versioning (fastify)', () => {
       .flatMap(v => v.split(','))
       .map(header => header.match(/v(\d+\.?\d*)\+json$/))
       .filter(match => match && match.length)
-      .map(matchArray => matchArray[1])
+      .map(matchArray => matchArray![1])
       .sort()
       .reverse();
 

integration/versioning/e2e/custom-versioning.spec.ts

@@ -11,11 +11,11 @@ describe('Custom Versioning', () => {
       ?.split(',')
       .map(header => header.match(/v(\d+\.?\d*)\+json$/))
       .filter(match => match && match.length)
-      .map(matchArray => matchArray[1])
+      .map(matchArray => matchArray![1])
       .sort()
       .reverse();
 
-    return versions;
+    return versions!;
   };
   let app: INestApplication;
 

integration/versioning/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

integration/websockets/e2e/error-gateway.spec.ts

@@ -11,7 +11,7 @@ describe('ErrorGateway', () => {
     const testingModule = await Test.createTestingModule({
       providers: [ErrorGateway],
     }).compile();
-    
+
     app = testingModule.createNestApplication();
     await app.listen(3000);
   });

integration/websockets/tsconfig.json

@@ -10,6 +10,7 @@
     "target": "ES2021",
     "sourceMap": true,
     "allowJs": true,
+    "strictNullChecks": true,
     "outDir": "./dist",
     "paths": {
       "@nestjs/common": ["../../packages/common"],

packages/common/exceptions/http.exception.ts

@@ -139,7 +139,7 @@ export class HttpException extends IntrinsicException {
 
     if (isString(arg0) || Array.isArray(arg0) || isNumber(arg0)) {
       return {
-        message: arg0!,
+        message: arg0,
         error: arg1 as string,
         statusCode: statusCode!,
       };
@@ -153,7 +153,7 @@ export class HttpException extends IntrinsicException {
   ): string {
     return isString(descriptionOrOptions)
       ? descriptionOrOptions
-      : descriptionOrOptions?.description!;
+      : (descriptionOrOptions?.description as string);
   }
 
   public static getHttpExceptionOptionsFrom(

packages/common/module-utils/configurable-module.builder.ts

@@ -269,7 +269,7 @@ export class ConfigurableModuleBuilder<
         const moduleOptions = {};
         const extrasKeys = Object.keys(extras);
 
-        Object.keys(input!)
+        Object.keys(input as object)
           .filter(key => !extrasKeys.includes(key))
           .forEach(key => {
             moduleOptions[key] = input[key];

packages/common/pipes/parse-enum.pipe.ts

@@ -77,7 +77,7 @@ export class ParseEnumPipe<T = any> implements PipeTransform<T> {
   }
 
   protected isEnum(value: T): boolean {
-    const enumValues = Object.keys(this.enumType!).map(
+    const enumValues = Object.keys(this.enumType as object).map(
       item => this.enumType[item],
     );
     return enumValues.includes(value);

packages/common/pipes/validation.pipe.ts

@@ -215,7 +215,7 @@ export class ValidationPipe implements PipeTransform<any> {
   }
 
   protected toEmptyIfNil<T = any, R = any>(value: T): R | object {
-    return isNil(value) ? {} : value!;
+    return isNil(value) ? {} : (value as object);
   }
 
   protected stripProtoKeys(value: any) {

packages/core/injector/injector.ts

@@ -365,7 +365,7 @@ export class Injector {
       return item;
     };
     return [
-      wrapper.inject?.map?.(mapFactoryProviderInjectArray)!,
+      wrapper.inject?.map?.(mapFactoryProviderInjectArray) as any[],
       optionalDependenciesIds,
     ];
   }

packages/core/injector/lazy-module-loader/lazy-module-loader.ts

@@ -40,7 +40,7 @@ export class LazyModuleLoader {
         moduleClassOrDynamicDefinition,
       );
       const moduleInstance = this.modulesContainer.get(token)!;
-      return moduleInstance && this.getTargetModuleRef(moduleInstance)!;
+      return moduleInstance && this.getTargetModuleRef(moduleInstance);
     }
     const lazyModulesContainer =
       this.createLazyModulesContainer(moduleInstances);

packages/core/inspector/graph-inspector.ts

@@ -219,7 +219,7 @@ export class GraphInspector {
         targetClassName: target.name,
         sourceClassToken: source.token,
         targetClassToken: target.token,
-        targetModuleName: target.host?.name!,
+        targetModuleName: target.host?.name as string,
         keyOrIndex,
         injectionType,
       },

packages/core/middleware/middleware-module.ts

@@ -338,7 +338,7 @@ export class MiddlewareModule<
   }
 
   private getContextId(request: unknown, isTreeDurable: boolean): ContextId {
-    const contextId = ContextIdFactory.getByRequest(request!);
+    const contextId = ContextIdFactory.getByRequest(request as object);
     if (!request![REQUEST_CONTEXT_ID]) {
       Object.defineProperty(request, REQUEST_CONTEXT_ID, {
         value: contextId,

packages/core/middleware/utils.ts

@@ -112,8 +112,8 @@ export function isMiddlewareRouteExcluded(
   if (excludedRoutes.length <= 0) {
     return false;
   }
-  const reqMethod = httpAdapter.getRequestMethod?.(req)!;
+  const reqMethod = httpAdapter.getRequestMethod!(req);
-  const originalUrl = httpAdapter.getRequestUrl?.(req)!;
+  const originalUrl = httpAdapter.getRequestUrl!(req);
   const queryParamsIndex = originalUrl ? originalUrl.indexOf('?') : -1;
   const pathname =
     queryParamsIndex >= 0

packages/core/repl/repl-context.ts

@@ -115,7 +115,7 @@ export class ReplContext {
     return typeof token !== 'string'
       ? typeof token === 'function'
         ? token.name
-        : token?.toString()!
+        : (token?.toString() as string)
       : `"${token}"`;
   }
 

packages/core/router/router-execution-context.ts

@@ -447,7 +447,7 @@ export class RouterExecutionContext {
           result,
           (res as any).raw || res,
           (req as any).raw || req,
-          { additionalHeaders: res.getHeaders?.()! },
+          { additionalHeaders: res.getHeaders!() },
         );
       };
     }

packages/core/scanner.ts

@@ -314,13 +314,13 @@ export class DependenciesScanner {
       ),
     );
     methodInjectables.forEach(methodInjectable => {
-      methodInjectable.metadata!.forEach(injectable =>
+      methodInjectable.metadata.forEach(injectable =>
         this.insertInjectable(
           injectable,
           token,
           component,
           ENHANCER_KEY_TO_SUBTYPE_MAP[metadataKey],
-          methodInjectable.methodKey!,
+          methodInjectable.methodKey,
         ),
       );
     });

packages/core/test/injector/helpers/provider-classifier.spec.ts

@@ -37,7 +37,7 @@ describe('provider classifier', () => {
     it('should return false if provider is undefined', () => {
       const classProvider = undefined!;
 
-      expect(isClassProvider(classProvider as ClassProvider)!).to.be.false;
+      expect(isClassProvider(classProvider)).to.be.false;
     });
   });
 

packages/microservices/client/client-kafka.ts

@@ -78,7 +78,7 @@ export class ClientKafka
         'No producer initialized. Please, call the "connect" method first.',
       );
     }
-    return this._producer!;
+    return this._producer;
   }
 
   constructor(protected readonly options: Required<KafkaOptions>['options']) {

packages/microservices/client/client-nats.ts

@@ -20,8 +20,8 @@ let natsPackage = {} as any;
 // type Client = import('nats').NatsConnection;
 // type NatsMsg = import('nats').Msg;
 
-type Client = any;
+type Client = Record<string, any>;
-type NatsMsg = any;
+type NatsMsg = Record<string, any>;
 
 /**
  * @publicApi
@@ -216,12 +216,12 @@ export class ClientNats extends ClientProxy<NatsEvents, NatsStatus> {
         callback,
       );
 
-      const subscription = this.natsClient.subscribe(inbox, {
+      const subscription = this.natsClient!.subscribe(inbox, {
         callback: subscriptionHandler,
       });
 
       const headers = this.mergeHeaders(serializedPacket.headers);
-      this.natsClient.publish(channel, serializedPacket.data, {
+      this.natsClient!.publish(channel, serializedPacket.data, {
         reply: inbox,
         headers,
       });
@@ -240,7 +240,7 @@ export class ClientNats extends ClientProxy<NatsEvents, NatsStatus> {
 
     return new Promise<void>((resolve, reject) => {
       try {
-        this.natsClient.publish(pattern, serializedPacket.data, {
+        this.natsClient!.publish(pattern, serializedPacket.data, {
           headers,
         });
         resolve();

packages/microservices/client/client-proxy.ts

@@ -198,7 +198,7 @@ export abstract class ClientProxy<
     prop: Attribute,
     defaultValue: DefaultValue = undefined as DefaultValue,
   ) {
-    return obj && prop in obj ? obj![prop] : defaultValue;
+    return obj && prop in obj ? (obj as any)[prop] : defaultValue;
   }
 
   protected normalizePattern(pattern: MsPattern): string {

packages/microservices/exceptions/base-rpc-exception-filter.ts

@@ -1,5 +1,3 @@
-
-/* eslint-disable prefer-spread */
 import {
   ArgumentsHost,
   IntrinsicException,

packages/microservices/exceptions/rpc-exception.ts

@@ -18,8 +18,9 @@ export class RpcException extends Error {
     ) {
       this.message = (this.error as Record<string, any>).message;
     } else if (this.constructor) {
-      this.message =
+      this.message = this.constructor.name
-        this.constructor!.name!.match(/[A-Z][a-z]+|[0-9]+/g)!.join(' ');
+        .match(/[A-Z][a-z]+|[0-9]+/g)!
+        .join(' ');
     }
   }
 

packages/microservices/listeners-controller.ts

@@ -167,7 +167,7 @@ export class ListenersController {
       {
         type: 'microservice',
         methodName: definition.methodKey,
-        className: instanceWrapper.metatype?.name!,
+        className: instanceWrapper.metatype?.name as string,
         classNodeId: instanceWrapper.id,
         metadata: {
           key: definition.patterns.toString(),

packages/microservices/server/server-factory.ts

@@ -32,7 +32,7 @@ export class ServerFactory {
       case Transport.MQTT:
         return new ServerMqtt(options as Required<MqttOptions>['options']);
       case Transport.GRPC:
-        return new ServerGrpc(options as Required<GrpcOptions>['options']);
+        return new ServerGrpc(options);
       case Transport.KAFKA:
         return new ServerKafka(options as Required<KafkaOptions>['options']);
       case Transport.RMQ:

packages/microservices/server/server-redis.ts

@@ -75,7 +75,7 @@ export class ServerRedis extends Server<RedisEvents, RedisStatus> {
   }
 
   public start(callback?: () => void) {
-    Promise.all([this.subClient.connect(), this.pubClient.connect()])
+    void Promise.all([this.subClient.connect(), this.pubClient.connect()])
       .then(() => {
         this.bindEvents(this.subClient, this.pubClient);
         callback?.();

packages/microservices/server/server.ts

@@ -219,7 +219,7 @@ export abstract class Server<
     prop: Attribute,
     defaultValue: DefaultValue = undefined as DefaultValue,
   ) {
-    return obj && prop in obj ? obj![prop] : defaultValue;
+    return obj && prop in obj ? (obj as any)[prop] : defaultValue;
   }
 
   protected handleError(error: string) {

packages/microservices/test/client/client-kafka.spec.ts

@@ -687,7 +687,7 @@ describe('ClientKafka', () => {
       assignPacketIdStub = sinon
         .stub(client as any, 'assignPacketId')
         .callsFake(packet =>
-          Object.assign(packet!, {
+          Object.assign(packet as object, {
             id: correlationId,
           }),
         );

packages/microservices/test/client/client-mqtt.spec.ts

@@ -58,7 +58,7 @@ describe('ClientMqtt', () => {
       connectSpy = sinon.stub(client, 'connect');
       assignStub = sinon
         .stub(client, 'assignPacketId' as any)
-        .callsFake(packet => Object.assign(packet!, { id }));
+        .callsFake(packet => Object.assign(packet as object, { id }));
     });
     afterEach(() => {
       connectSpy.restore();

packages/microservices/test/client/client-nats.spec.ts

@@ -88,7 +88,7 @@ describe('ClientNats', () => {
         callback = sinon.spy();
         assignStub = sinon
           .stub(client, 'assignPacketId' as any)
-          .callsFake(packet => Object.assign(packet!, { id }));
+          .callsFake(packet => Object.assign(packet as object, { id }));
 
         subscription = client['publish'](msg, callback);
         subscription();

packages/microservices/test/client/client-redis.spec.ts

@@ -93,7 +93,7 @@ describe('ClientRedis', () => {
         callback = sinon.spy();
         assignStub = sinon
           .stub(client, 'assignPacketId' as any)
-          .callsFake(packet => Object.assign(packet!, { id }));
+          .callsFake(packet => Object.assign(packet as object, { id }));
 
         getReplyPatternStub = sinon
           .stub(client, 'getReplyPattern')

packages/microservices/test/json-socket/connection.spec.ts

@@ -176,16 +176,16 @@ describe('JsonSocket connection', () => {
       server.once('connection', socket => {
         const serverSocket = new JsonSocket(socket);
 
-        serverSocket!.once('end', () => {
+        serverSocket.once('end', () => {
           setTimeout(() => {
-            expect(serverSocket!['isClosed']).to.equal(true);
+            expect(serverSocket['isClosed']).to.equal(true);
-            expect(clientSocket!['isClosed']).to.equal(true);
+            expect(clientSocket['isClosed']).to.equal(true);
 
-            clientSocket!.on(TcpEventsMap.CONNECT, () => {
+            clientSocket.on(TcpEventsMap.CONNECT, () => {
               setTimeout(() => {
-                expect(clientSocket!['isClosed']).to.equal(false);
+                expect(clientSocket['isClosed']).to.equal(false);
 
-                clientSocket!.end();
+                clientSocket.end();
                 server.close(done);
               }, 10);
             });
@@ -196,11 +196,11 @@ describe('JsonSocket connection', () => {
             }
             const port2 = (address2 as AddressInfo).port;
 
-            clientSocket!.connect(port2, ip);
+            clientSocket.connect(port2, ip);
           }, 10);
         });
 
-        clientSocket!.end();
+        clientSocket.end();
       });
 
       const address1 = server.address();
@@ -209,7 +209,7 @@ describe('JsonSocket connection', () => {
       }
       const port1 = (address1 as AddressInfo).port;
 
-      clientSocket!.connect(port1, ip);
+      clientSocket.connect(port1, ip);
     });
     server.listen();
   });

packages/microservices/test/server/server-kafka.spec.ts

@@ -393,9 +393,7 @@ describe('ServerKafka', () => {
       await server.handleMessage(payload);
       expect(
         getPublisherSpy.calledWith({
-          id: payload.message!.headers![
+          id: payload.message.headers![KafkaHeaders.CORRELATION_ID]!.toString(),
-            KafkaHeaders.CORRELATION_ID
-          ]!.toString(),
           err: NO_MESSAGE_HANDLER,
         }),
       ).to.be.true;
@@ -455,7 +453,7 @@ describe('ServerKafka', () => {
           response: messageValue,
         },
         replyTopic,
-        undefined!,
+        '',
         correlationId,
       );
 

packages/platform-express/adapters/express-adapter.ts

@@ -268,7 +268,7 @@ export class ExpressAdapter extends AbstractHttpAdapter<
     options?: Omit<Options, 'verify'>,
   ): this {
     const parserOptions = getBodyParserOptions<Options>(rawBody, options);
-    const parser = bodyparser[type](parserOptions!);
+    const parser = bodyparser[type](parserOptions);
 
     this.use(parser);
 

packages/platform-fastify/adapters/fastify-adapter.ts

@@ -428,7 +428,7 @@ export class FastifyAdapter<
       response.statusCode = statusCode;
       return response;
     }
-    return (response as TReply).code(statusCode);
+    return (response as { code: Function }).code(statusCode);
   }
 
   public end(response: TReply, message?: string) {

packages/websockets/errors/ws-exception.ts

@@ -15,8 +15,9 @@ export class WsException extends Error {
     ) {
       this.message = (this.error as Record<string, any>).message;
     } else if (this.constructor) {
-      this.message =
+      this.message = this.constructor.name
-        this.constructor!.name!.match(/[A-Z][a-z]+|[0-9]+/g)!.join(' ');
+        .match(/[A-Z][a-z]+|[0-9]+/g)!
+        .join(' ');
     }
   }