Error using typescript

[devcitopia]

Prerequisites

Please answer the following questions for yourself before submitting an issue.

• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed
• I'm reporting the issue to the correct repository

Current Behavior

I try to tsc my project using @moleculer/channels but it returns me two errors:
@moleculer/channels/types/src/adapters/base.d.ts:120:35 - error TS2304: Cannot find name 'Service'.
@moleculer/channels/types/src/index.d.ts:30:1 - error TS2309: An export assignment cannot be used in a module with other exported elements.

The first error coming from version 0.1.3

Expected Behavior

I can compile my project.

Steps to Reproduce

Please provide detailed steps for reproducing the issue.

1. Add package to package.json
2. Use it in your project
3. Try to compile typescript

Context

• Moleculer version: 0.14.23
• NodeJS version: 18 (failing with 16 as well)

Proposing to change export = _exports to export default _exports in types/src/index.d.ts.
And add import of type Service in types/src/adapters/base.d.ts (in subscription function declaration)

[devcitopia]

We just created a PR related to this issue: #54

[ujwal-setlur]

Just to add here, typescript support seems quite broken to the point I have to use the any keyword in my TS code to use this package, and that defeats the purpose of Typescript.

Here is my sample typescript code:

index.ts:

import { ServiceBroker } from 'moleculer';
import { Middleware } from '@moleculer/channels';

const main = async () => {
  // service schema
  const serviceSchema = {
    name: 'helper',

    channels: {
      async 'helper.sum'(payload: { a: number; b: number }): Promise<number> {
        return payload.a + payload.b;
      },
    },
  };

  const mw = Middleware({ adapter: { type: 'Fake' } }); // ERROR here

  const broker = new ServiceBroker({
    logLevel: 'info',
    middlewares: [mw], // ERROR here
  });

  broker.createService(serviceSchema);

  await broker.start();

  await broker.stop();
};

main();

Running npx tsc, I get these errors:

npx tsc
index.ts:16:27 - error TS2322: Type '{ type: string; }' is not assignable to type 'string | AdapterConfig'.
  Property 'options' is missing in type '{ type: string; }' but required in type 'AdapterConfig'.

16   const mw = Middleware({ adapter: { type: 'Fake' } });
                             ~~~~~~~

  node_modules/@moleculer/channels/types/src/index.d.ts:130:5
    130     options: import("./adapters/base").BaseDefaultOptions & import("./adapters/amqp").AmqpDefaultOptions & import("./adapters/kafka").KafkaDefaultOptions & import("./adapters/nats").NatsDefaultOptions & import("./adapters/redis").RedisDefaultOptions;
            ~~~~~~~
    'options' is declared here.
  node_modules/@moleculer/channels/types/src/index.d.ts:139:5
    139     adapter: string | AdapterConfig;
            ~~~~~~~
    The expected type comes from property 'adapter' which is declared here on type 'MiddlewareOptions'

index.ts:20:19 - error TS2322: Type '{ name: string; created(_broker: ServiceBroker): void; serviceCreated(svc: Service<ServiceSettingSchema>): Promise<void>; serviceStopping(svc: Service<...>): Promise<...>; started(): Promise<...>; stopped(): Promise<...>; }' is not assignable to type 'string | Middleware'.
  Type '{ name: string; created(_broker: ServiceBroker): void; serviceCreated(svc: Service<ServiceSettingSchema>): Promise<void>; serviceStopping(svc: Service<...>): Promise<...>; started(): Promise<...>; stopped(): Promise<...>; }' is not assignable to type 'Middleware'.
    Property 'name' is incompatible with index signature.
      Type 'string' is not assignable to type '((handler: ActionHandler<any>, action: ActionSchema) => any) | ((handler: ActionHandler<any>, event: ServiceEvent) => any) | ((handler: ActionHandler<...>) => any) | ((service: Service<...>) => any) | ((broker: ServiceBroker) => any) | ((handler: CallMiddlewareHandler) => CallMiddlewareHandler)'.

20     middlewares: [mw],
                     ~~


Found 2 errors in the same file, starting at: index.ts:16

I can make this work by using the any keyword in setting the options for the middleware, and also while adding the middleware:

index.ts:

import { ServiceBroker } from 'moleculer';
import { Middleware } from '@moleculer/channels';

const main = async () => {
  // service schema
  const serviceSchema = {
    name: 'helper',

    channels: {
      async 'helper.sum'(payload: { a: number; b: number }): Promise<number> {
        return payload.a + payload.b;
      },
    },
  };

  const mw = Middleware({ adapter: { type: 'Fake' } } as any); // I should not need to use 'as any' here, this is due to the typings marking all fields as mandatory

  const broker = new ServiceBroker({
    logLevel: 'info',
    middlewares: [mw as any], // I should not need to use 'as any' here, this is due to mismatch in typings between what is expected and and what is supplied
  });

  broker.createService(serviceSchema);

  await broker.start();

  await broker.stop();
};

main();

[ujwal-setlur]

And I have to set "skipLibCheck": true for it to compile, otherwise, it checks all the ```*.d.ts`` files and gets errors for the brokers that are not being used. I use AMQP, so I get errors for every other broker since they are not installed:

npx tsc
node_modules/@moleculer/channels/types/src/adapters/kafka.d.ts:113:27 - error TS2307: Cannot find module 'kafkajs' or its corresponding type declarations.

113 type KafkaClient = import('kafkajs').Kafka;
                              ~~~~~~~~~

node_modules/@moleculer/channels/types/src/adapters/kafka.d.ts:117:29 - error TS2307: Cannot find module 'kafkajs' or its corresponding type declarations.

117 type KafkaProducer = import('kafkajs').Producer;
                                ~~~~~~~~~

node_modules/@moleculer/channels/types/src/adapters/kafka.d.ts:121:29 - error TS2307: Cannot find module 'kafkajs' or its corresponding type declarations.

121 type KafkaConsumer = import('kafkajs').Consumer;
                                ~~~~~~~~~

node_modules/@moleculer/channels/types/src/adapters/kafka.d.ts:129:34 - error TS2307: Cannot find module 'kafkajs' or its corresponding type declarations.

129 type EachMessagePayload = import('kafkajs').EachMessagePayload;
                                     ~~~~~~~~~

node_modules/@moleculer/channels/types/src/adapters/kafka.d.ts:133:27 - error TS2307: Cannot find module 'kafkajs' or its corresponding type declarations.

133 type KafkaConfig = import('kafkajs').KafkaConfig;
                              ~~~~~~~~~

node_modules/@moleculer/channels/types/src/adapters/kafka.d.ts:137:30 - error TS2307: Cannot find module 'kafkajs' or its corresponding type declarations.

137 type ProducerConfig = import('kafkajs').ProducerConfig;
                                 ~~~~~~~~~

node_modules/@moleculer/channels/types/src/adapters/kafka.d.ts:141:30 - error TS2307: Cannot find module 'kafkajs' or its corresponding type declarations.

141 type ConsumerConfig = import('kafkajs').ConsumerConfig;
                                 ~~~~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:63:56 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

63     createConsumerHandler(chan: Channel): (err: import("nats").NatsError, message: JsMsg) => Promise<void>;
                                                          ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:73:105 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

73     createStream(streamName: string, subjects: Array<string>, streamOpts: StreamConfig): Promise<import("nats").StreamInfo>;
                                                                                                           ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:120:30 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

120 type NatsConnection = import("nats").NatsConnection;
                                 ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:124:32 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

124 type JetStreamManager = import("nats").JetStreamManager;
                                   ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:128:31 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

128 type JetStreamClient = import("nats").JetStreamClient;
                                  ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:132:37 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

132 type JetStreamSubscription = import("nats").JetStreamSubscription;
                                        ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:140:21 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

140 type JsMsg = import("nats").JsMsg;
                        ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:144:28 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

144 type StreamConfig = import("nats").StreamConfig;
                               ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:148:39 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

148 type JetStreamPublishOptions = import("nats").JetStreamPublishOptions;
                                          ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:152:33 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

152 type ConnectionOptions = import("nats").ConnectionOptions;
                                    ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:156:35 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

156 type ConsumerOptsBuilder = import("nats").ConsumerOptsBuilder;
                                      ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:160:28 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

160 type ConsumerOpts = import("nats").ConsumerOpts;
                               ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:164:32 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

164 type JetStreamOptions = import("nats").JetStreamOptions;
                                   ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/nats.d.ts:168:23 - error TS2307: Cannot find module 'nats' or its corresponding type declarations.

168 type MsgHdrs = import("nats").MsgHdrs;
                          ~~~~~~

node_modules/@moleculer/channels/types/src/adapters/redis.d.ts:125:23 - error TS2307: Cannot find module 'ioredis' or its corresponding type declarations.

125 type Cluster = import("ioredis").Cluster;
                          ~~~~~~~~~

node_modules/@moleculer/channels/types/src/adapters/redis.d.ts:177:21 - error TS2307: Cannot find module 'ioredis' or its corresponding type declarations.

177 type Redis = import("ioredis").Redis;
                        ~~~~~~~~~

node_modules/@moleculer/channels/types/src/adapters/redis.d.ts:178:28 - error TS2307: Cannot find module 'ioredis' or its corresponding type declarations.

178 type RedisOptions = import("ioredis").RedisOptions;
                               ~~~~~~~~~

node_modules/@moleculer/channels/types/src/index.d.ts:30:1 - error TS2309: An export assignment cannot be used in a module with other exported elements.

30 export = _exports;

I think typescript support needs to be seriously revisited here...