3.0.9

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@api.global/typedrequest",
-  "version": "3.0.1",
+  "version": "3.0.9",
   "private": false,
   "description": "make typed requests towards apis",
   "main": "dist_ts/index.js",
@@ -14,22 +14,24 @@
     "buildDocs": "tsdoc"
   },
   "devDependencies": {
-    "@api.global/typedserver": "^3.0.1",
-    "@gitzone/tsbuild": "^2.1.66",
-    "@gitzone/tsbundle": "^2.0.8",
-    "@gitzone/tsrun": "^1.2.44",
-    "@gitzone/tstest": "^1.0.77",
-    "@push.rocks/smartenv": "^5.0.3",
-    "@push.rocks/tapbundle": "^5.0.12",
-    "@types/node": "^20.4.7"
+    "@api.global/typedserver": "^3.0.25",
+    "@git.zone/tsbuild": "^2.1.72",
+    "@git.zone/tsbundle": "^2.0.15",
+    "@git.zone/tsrun": "^1.2.44",
+    "@git.zone/tstest": "^1.0.86",
+    "@push.rocks/smartenv": "^5.0.12",
+    "@push.rocks/tapbundle": "^5.0.15",
+    "@types/node": "^20.11.24"
   },
   "dependencies": {
-    "@api.global/typedrequest-interfaces": "^3.0.1",
+    "@api.global/typedrequest-interfaces": "^3.0.18",
     "@push.rocks/isounique": "^1.0.5",
-    "@push.rocks/lik": "^6.0.3",
+    "@push.rocks/lik": "^6.0.14",
+    "@push.rocks/smartbuffer": "^1.0.6",
     "@push.rocks/smartdelay": "^3.0.5",
     "@push.rocks/smartpromise": "^4.0.3",
-    "@push.rocks/webrequest": "^3.0.32"
+    "@push.rocks/webrequest": "^3.0.34",
+    "@push.rocks/webstream": "^1.0.8"
   },
   "files": [
     "ts/**/*",

test/test.ts

@@ -2,8 +2,10 @@ import { expect, tap } from '@push.rocks/tapbundle';
 import * as typedserver from '@api.global/typedserver';
 
 import * as typedrequest from '../ts/index.js';
+import * as typedrequestInterfaces from '@api.global/typedrequest-interfaces';
 
 let testServer: typedserver.servertools.Server;
+let testTypedRouter: typedrequest.TypedRouter;
 let testTypedHandler: typedrequest.TypedHandler<ITestReqRes>;
 
 // lets define an interface
@@ -17,6 +19,16 @@ interface ITestReqRes {
   };
 }
 
+interface ITestStream {
+  method: 'handleStream';
+  request: {
+    requestStream: typedrequestInterfaces.IVirtualStream;
+  };
+  response: {
+    responseStream: typedrequestInterfaces.IVirtualStream;
+  };
+}
+
 tap.test('should create a typedHandler', async () => {
   // lets use the interface in a TypedHandler
   testTypedHandler = new typedrequest.TypedHandler<ITestReqRes>('hi', async (reqArg) => {
@@ -35,7 +47,7 @@ tap.test('should spawn a server to test with', async () => {
 });
 
 tap.test('should define a testHandler', async () => {
-  const testTypedRouter = new typedrequest.TypedRouter(); // typed routers can broker typedrequests between handlers
+  testTypedRouter = new typedrequest.TypedRouter(); // typed routers can broker typedrequests between handlers
   testTypedRouter.addTypedHandler(testTypedHandler);
   testServer.addRoute(
     '/testroute',
@@ -60,7 +72,36 @@ tap.test('should fire a request', async () => {
   expect(response.surname).toEqual('wow');
 });
 
-tap.test('should end the server', async () => {
+tap.test('should allow VirtualStreams', async () => {
+  const newRequestingVS = new typedrequest.VirtualStream();
+  const newRespondingVS = new typedrequest.VirtualStream();
+  let generatedRequestingVS: typedrequestInterfaces.IVirtualStream;
+  let generatedRespondingVS: typedrequestInterfaces.IVirtualStream;
+  testTypedRouter.addTypedHandler(new typedrequest.TypedHandler<ITestStream>('handleStream', async (reqArg) => {
+    console.log('hey there');
+    console.log(reqArg.requestStream);
+    generatedRequestingVS = reqArg.requestStream;
+    return {
+      responseStream: newRespondingVS,
+    };
+  }));
+  const typedRequest = new typedrequest.TypedRequest<ITestStream>(
+    'http://localhost:3000/testroute',
+    'handleStream'
+  );
+  const response = await typedRequest.fire({
+    requestStream: newRequestingVS,
+  });
+  console.log(response.responseStream);
+
+  newRequestingVS.sendData(Buffer.from('hello'));
+  const data = await generatedRequestingVS.fetchData();
+  const decodedData = data.toString();
+  expect(data.toString()).toEqual('hello');
+});
+
+tap.test('should end the server', async (toolsArg) => {
+  await toolsArg.delayFor(5000);
   await testServer.stop();
 });
 

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@api.global/typedrequest',
-  version: '3.0.1',
+  version: '3.0.9',
   description: 'make typed requests towards apis'
 }

ts/index.ts

@@ -3,3 +3,4 @@ export * from './typedrequest.classes.typedhandler.js';
 export * from './typedrequest.classes.typedrouter.js';
 export * from './typedrequest.classes.typedresponseerror.js';
 export * from './typedrequest.classes.typedtarget.js';
+export * from './typedrequest.classes.virtualstream.js';

ts/plugins.ts

@@ -6,8 +6,10 @@ export { typedRequestInterfaces };
 // pushrocks scope
 import * as isounique from '@push.rocks/isounique';
 import * as lik from '@push.rocks/lik';
+import * as smartbuffer from '@push.rocks/smartbuffer';
 import * as smartdelay from '@push.rocks/smartdelay';
 import * as smartpromise from '@push.rocks/smartpromise';
 import * as webrequest from '@push.rocks/webrequest';
+import * as webstream from '@push.rocks/webstream';
 
-export { isounique, lik, smartdelay, smartpromise, webrequest };
+export { isounique, lik, smartbuffer, smartdelay, smartpromise, webrequest, webstream };

ts/typedrequest.classes.typedhandler.ts

@@ -1,4 +1,4 @@
-import * as plugins from './typedrequest.plugins.js';
+import * as plugins from './plugins.js';
 import { TypedResponseError } from './typedrequest.classes.typedresponseerror.js';
 
 export type THandlerFunction<T extends plugins.typedRequestInterfaces.ITypedRequest> = (

ts/typedrequest.classes.typedrequest.ts

@@ -1,4 +1,5 @@
-import * as plugins from './typedrequest.plugins.js';
+import * as plugins from './plugins.js';
+import { VirtualStream } from './typedrequest.classes.virtualstream.js';
 import { TypedResponseError } from './typedrequest.classes.typedresponseerror.js';
 import { TypedRouter } from './typedrequest.classes.typedrouter.js';
 import { TypedTarget } from './typedrequest.classes.typedtarget.js';
@@ -19,7 +20,6 @@ export class TypedRequest<T extends plugins.typedRequestInterfaces.ITypedRequest
   public method: string;
 
   /**
-   * note the overloading is thought to deal with promises
    * @param postEndPointArg
    * @param methodArg
    */
@@ -36,7 +36,7 @@ export class TypedRequest<T extends plugins.typedRequestInterfaces.ITypedRequest
    * fires the request
    */
   public async fire(fireArg: T['request'], useCacheArg: boolean = false): Promise<T['response']> {
-    const payload: plugins.typedRequestInterfaces.ITypedRequest = {
+    let payloadSending: plugins.typedRequestInterfaces.ITypedRequest = {
       method: this.method,
       request: fireArg,
       response: null,
@@ -46,30 +46,58 @@ export class TypedRequest<T extends plugins.typedRequestInterfaces.ITypedRequest
       },
     };
 
-    let responseBody: plugins.typedRequestInterfaces.ITypedRequest;
+    // lets preprocess the payload
+    payloadSending = VirtualStream.encodePayloadForNetwork(payloadSending, {
+      sendMethod: (payloadArg: plugins.typedRequestInterfaces.IStreamRequest) => {
+        return this.postTrObject(payloadArg) as Promise<plugins.typedRequestInterfaces.IStreamRequest>;
+      }
+    });
+
+    let payloadReceiving: plugins.typedRequestInterfaces.ITypedRequest;
+    payloadReceiving = await this.postTrObject(payloadSending, useCacheArg);
+
+    // lets preprocess the response
+    payloadReceiving = VirtualStream.decodePayloadFromNetwork(payloadReceiving, {
+      sendMethod: (payloadArg: plugins.typedRequestInterfaces.IStreamRequest) => {
+        return this.postTrObject(payloadArg) as Promise<plugins.typedRequestInterfaces.IStreamRequest>;
+      }
+    });
+    return payloadReceiving.response;
+  }
+
+  private async postTrObject(payloadSendingArg: plugins.typedRequestInterfaces.ITypedRequest, useCacheArg: boolean = false) {
+    let payloadReceiving: plugins.typedRequestInterfaces.ITypedRequest;
     if (this.urlEndPoint) {
-      const response = await webrequestInstance.postJson(this.urlEndPoint, payload, useCacheArg);
-      responseBody = response;
+      const response = await webrequestInstance.postJson(
+        this.urlEndPoint,
+        payloadSendingArg,
+        useCacheArg
+      );
+      payloadReceiving = response;
     } else {
-      responseBody = await this.typedTarget.post(payload);
+      payloadReceiving = await this.typedTarget.post(payloadSendingArg);
     }
-    if (responseBody.error) {
+    if (payloadReceiving.error) {
       console.error(
-        `Got an error ${responseBody.error.text} with data ${JSON.stringify(
-          responseBody.error.data
+        `Got an error ${payloadReceiving.error.text} with data ${JSON.stringify(
+          payloadReceiving.error.data,
+          null,
+          2
         )}`
       );
-      if (!responseBody.retry) {
-        throw new TypedResponseError(responseBody.error.text, responseBody.error.data);
+      if (!payloadReceiving.retry) {
+        throw new TypedResponseError(payloadReceiving.error.text, payloadReceiving.error.data);
       }
       return null;
     }
-    if (responseBody.retry) {
-      console.log(`server requested retry for the following reason: ${responseBody.retry.reason}`);
-      await plugins.smartdelay.delayFor(responseBody.retry.waitForMs);
+    if (payloadReceiving.retry) {
+      console.log(
+        `server requested retry for the following reason: ${payloadReceiving.retry.reason}`
+      );
+      await plugins.smartdelay.delayFor(payloadReceiving.retry.waitForMs);
       // tslint:disable-next-line: no-return-await
-      return await this.fire(fireArg);
+      payloadReceiving =  await this.postTrObject(payloadSendingArg, useCacheArg);
     }
-    return responseBody.response;
+    return payloadReceiving;
   }
 }

ts/typedrequest.classes.typedresponseerror.ts

@@ -1,4 +1,4 @@
-import * as plugins from './typedrequest.plugins.js';
+import * as plugins from './plugins.js';
 
 export class TypedResponseError {
   public errorText: string;

ts/typedrequest.classes.typedrouter.ts

@@ -1,4 +1,5 @@
-import * as plugins from './typedrequest.plugins.js';
+import * as plugins from './plugins.js';
+import { VirtualStream } from './typedrequest.classes.virtualstream.js';
 
 import { TypedHandler } from './typedrequest.classes.typedhandler.js';
 import { TypedRequest } from './typedrequest.classes.typedrequest.js';
@@ -13,6 +14,7 @@ export class TypedRouter {
   public handlerMap = new plugins.lik.ObjectMap<
     TypedHandler<any & plugins.typedRequestInterfaces.ITypedRequest>
   >();
+  public registeredVirtualStreams = new plugins.lik.ObjectMap<VirtualStream<any>>();
 
   public fireEventInterestMap = new plugins.lik.InterestMap<
     string,
@@ -89,6 +91,23 @@ export class TypedRouter {
   public async routeAndAddResponse<
     T extends plugins.typedRequestInterfaces.ITypedRequest = plugins.typedRequestInterfaces.ITypedRequest
   >(typedRequestArg: T, localRequestArg = false): Promise<T> {
+    // decoding first
+    typedRequestArg = VirtualStream.decodePayloadFromNetwork(typedRequestArg, {
+      typedrouter: this,
+    });
+
+    // localdata second
+    typedRequestArg.localData = typedRequestArg.localData || {};
+    typedRequestArg.localData.firstTypedrouter = this;
+
+    // lets do stream processing
+    if (typedRequestArg.method === '##VirtualStream##') {
+      const result: any = await this.handleStreamTypedRequest(typedRequestArg as plugins.typedRequestInterfaces.IStreamRequest);
+      result.localData = null;
+      return result as T;
+    }
+
+    // lets do normal routing
     if (typedRequestArg?.correlation?.phase === 'request' || localRequestArg) {
       const typedHandler = this.getTypedHandlerForMethod(typedRequestArg.method);
 
@@ -99,10 +118,20 @@ export class TypedRouter {
           data: {},
         };
         typedRequestArg.correlation.phase = 'response';
+
+        // encode again before handing back
+        typedRequestArg = VirtualStream.encodePayloadForNetwork(typedRequestArg, {
+          typedrouter: this,
+        });
         return typedRequestArg;
       }
 
       typedRequestArg = await typedHandler.addResponse(typedRequestArg);
+      typedRequestArg.localData = null;
+      // encode again before handing back
+      typedRequestArg = VirtualStream.encodePayloadForNetwork(typedRequestArg, {
+        typedrouter: this,
+      });
       return typedRequestArg;
     } else if (typedRequestArg?.correlation?.phase === 'response') {
       this.fireEventInterestMap
@@ -115,4 +144,23 @@ export class TypedRouter {
       return null;
     }
   }
+
+  /**
+   * handle streaming
+   * @param streamTrArg 
+   */
+  public async handleStreamTypedRequest(streamTrArg: plugins.typedRequestInterfaces.IStreamRequest) {
+    const relevantVirtualStream = await this.registeredVirtualStreams.find(async virtualStreamArg => {
+      return virtualStreamArg.streamId === streamTrArg.request.streamId;
+    });
+    if (!relevantVirtualStream) {
+      console.log(`no relevant virtual stream found for stream with id ${streamTrArg.request.streamId}`);
+      console.log(this.registeredVirtualStreams.getArray());
+      return streamTrArg;
+    } else {
+      console.log(`success: found relevant virtual stream with id ${streamTrArg.request.streamId}`);
+    }
+    const result = await relevantVirtualStream.handleStreamTr(streamTrArg);
+    return result;
+  }
 }

ts/typedrequest.classes.typedtarget.ts

@@ -1,5 +1,5 @@
 import { TypedRouter } from './typedrequest.classes.typedrouter.js';
-import * as plugins from './typedrequest.plugins.js';
+import * as plugins from './plugins.js';
 
 export type IPostMethod = (
   typedRequestPostObject: plugins.typedRequestInterfaces.ITypedRequest

ts/typedrequest.classes.virtualstream.ts

@@ -0,0 +1,375 @@
+import * as plugins from './plugins.js';
+import type { TypedRouter } from './typedrequest.classes.typedrouter.js';
+
+export interface ICommFunctions {
+  sendMethod?: (
+    sendPayload: plugins.typedRequestInterfaces.IStreamRequest
+  ) => Promise<plugins.typedRequestInterfaces.IStreamRequest>;
+  typedrouter?: TypedRouter;
+}
+
+/**
+ * 1. A VirtualStream connects over the network
+ * 2. It is always paired to one other VirtualStream
+ *    on the other side with the same streamId.
+ * 3. It has a Readable and Writable side.
+ * 4. The Writable side is Readable on the other side and vice versa.
+ */
+export class VirtualStream<T = ArrayBufferLike> implements plugins.typedRequestInterfaces.IVirtualStream<T> {
+  // STATIC
+  public static encodePayloadForNetwork(
+    objectPayload: any,
+    commFunctions: ICommFunctions,
+    originalPayload?: any,
+    path = []
+  ): any {
+    if (plugins.smartbuffer.isBufferLike(objectPayload)) {
+      return objectPayload;
+    }
+    if (objectPayload instanceof VirtualStream) {
+      if (!objectPayload.side && commFunctions.sendMethod) {
+        objectPayload.side = 'requesting';
+        objectPayload.sendMethod = commFunctions.sendMethod;
+      }
+      if (!objectPayload.side && commFunctions.typedrouter) {
+        objectPayload.side = 'responding';
+        objectPayload.typedrouter = commFunctions.typedrouter;
+        commFunctions.typedrouter.registeredVirtualStreams.add(objectPayload);
+      }
+      if (!originalPayload.response || path.includes('response')) {
+        objectPayload.startKeepAliveLoop();
+        return {
+          _isVirtualStream: true,
+          streamId: objectPayload.streamId,
+        };
+      } else {
+        return {
+          _OBMITTED_VIRTUAL_STREAM: true,
+          reason: 'path is under .request: obmitted for deduplication reasons in response cycle.',
+        };
+      }
+    } else if (Array.isArray(objectPayload)) {
+      const returnArray = [];
+      for (const item of objectPayload) {
+        returnArray.push(
+          VirtualStream.encodePayloadForNetwork(
+            item,
+            commFunctions,
+            originalPayload || objectPayload,
+            path
+          )
+        );
+      }
+      return returnArray;
+    } else if (objectPayload !== null && typeof objectPayload === 'object') {
+      return Object.keys(objectPayload).reduce((acc, key) => {
+        path.push(key);
+        acc[key] = VirtualStream.encodePayloadForNetwork(
+          objectPayload[key],
+          commFunctions,
+          originalPayload || objectPayload,
+          path
+        );
+        return acc;
+      }, {});
+    } else {
+      return objectPayload;
+    }
+  }
+
+  public static decodePayloadFromNetwork(objectPayload: any, commFunctions: ICommFunctions): any {
+    if (plugins.smartbuffer.isBufferLike(objectPayload)) {
+      return objectPayload;
+    }
+    if (objectPayload !== null && typeof objectPayload === 'object') {
+      if (objectPayload._isVirtualStream) {
+        const virtualStream = new VirtualStream();
+        virtualStream.streamId = objectPayload.streamId;
+        if (!virtualStream.side && commFunctions.sendMethod) {
+          virtualStream.side = 'requesting';
+          virtualStream.sendMethod = commFunctions.sendMethod;
+        }
+        if (!virtualStream.side && commFunctions.typedrouter) {
+          virtualStream.side = 'responding';
+          virtualStream.typedrouter = commFunctions.typedrouter;
+          commFunctions.typedrouter.registeredVirtualStreams.add(virtualStream);
+        }
+        virtualStream.startKeepAliveLoop();
+        return virtualStream;
+      } else if (Array.isArray(objectPayload)) {
+        const returnArray = [];
+        for (const item of objectPayload) {
+          returnArray.push(VirtualStream.decodePayloadFromNetwork(item, commFunctions));
+        }
+        return returnArray;
+      } else {
+        return Object.keys(objectPayload).reduce((acc, key) => {
+          acc[key] = VirtualStream.decodePayloadFromNetwork(objectPayload[key], commFunctions);
+          return acc;
+        }, {});
+      }
+    } else {
+      return objectPayload;
+    }
+  }
+
+  // INSTANCE
+
+  public side: 'requesting' | 'responding';
+  public streamId: string = plugins.isounique.uni();
+
+  // integration with typedrequest mechanics
+  public sendMethod: ICommFunctions['sendMethod'];
+  public typedrouter: TypedRouter;
+
+  // wether to keep the stream alive
+  private keepAlive = true;
+  private lastKeepAliveEvent: number;
+
+  // backpressured arrays
+  private sendBackpressuredArray =
+    new plugins.lik.BackpressuredArray<T>(
+      16
+    );
+  private receiveBackpressuredArray =
+    new plugins.lik.BackpressuredArray<T>(
+      16
+    );
+
+  constructor() {}
+
+  /**
+   * takes care of sending 
+   */
+  private async workOnQueue() {
+    if(this.side === 'requesting') {
+      let thisSideIsBackpressured = !this.receiveBackpressuredArray.checkSpaceAvailable();
+      let otherSideHasNext = false;
+      let otherSideIsBackpressured = false;
+      
+      // helper functions
+      const getFeedback = async () => {
+        const streamTr = await this.sendMethod({
+          method: '##VirtualStream##',
+          request: {
+            streamId: this.streamId,
+            cycleId: plugins.isounique.uni(),
+            cycle: 'request',
+            mainPurpose: 'feedback',
+            next: this.sendBackpressuredArray.data.length > 0,
+            backpressure: this.receiveBackpressuredArray.checkSpaceAvailable(),
+          },
+          response: null,
+        }).catch(() => {
+          console.log('stream ended immaturely');
+          this.keepAlive = false;
+        });
+        if (streamTr && streamTr.response) {
+          otherSideIsBackpressured = streamTr.response.backpressure
+          otherSideHasNext = streamTr.response.next;
+        }
+      }
+      await getFeedback();
+
+      // do work loop
+      while (this.sendBackpressuredArray.data.length > 0 || otherSideHasNext) {
+        let dataArg: typeof this.sendBackpressuredArray.data[0];
+        if (this.sendBackpressuredArray.data.length > 0) {
+          dataArg = this.sendBackpressuredArray.shift();
+        }
+        let streamTr: plugins.typedRequestInterfaces.IStreamRequest;
+        streamTr = await this.sendMethod({
+          method: '##VirtualStream##',
+          request: {
+            streamId: this.streamId,
+            cycleId: plugins.isounique.uni(),
+            cycle: 'request',
+            mainPurpose: dataArg ? 'chunk' : 'read',
+            backpressure: thisSideIsBackpressured,
+            next: this.sendBackpressuredArray.data.length > 0,
+            ...dataArg ? { chunkData: dataArg } : {},
+          },
+          response: null,
+        }).catch(() => {
+          console.log('stream ended immaturely');
+          this.keepAlive = false;
+          return null;
+        });
+
+        if (streamTr && streamTr.response && streamTr.response.chunkData) {
+          this.receiveBackpressuredArray.push(streamTr.response.chunkData);
+        }
+        thisSideIsBackpressured = this.receiveBackpressuredArray.checkSpaceAvailable();
+
+        // lets care about looping
+        otherSideHasNext = streamTr && streamTr.response && streamTr.response.next;
+      }
+
+    }
+  }
+
+  /**
+   * This method handles the stream only on the responding side
+   * @param streamTrArg
+   * @returns
+   */
+  public async handleStreamTr(streamTrArg: plugins.typedRequestInterfaces.IStreamRequest) {
+    if (streamTrArg.request.keepAlive === true && this.keepAlive === true) {
+      this.lastKeepAliveEvent = Date.now();
+    } else if (streamTrArg.request.keepAlive === false) {
+      this.keepAlive = false;
+    }
+
+    // keepAlive handling
+    if (streamTrArg.request.mainPurpose === 'keepAlive') {
+      // if the main purpose is keepAlive, we answer with a keepAlive
+      streamTrArg.response = {
+        streamId: this.streamId,
+        cycleId: streamTrArg.request.cycleId,
+        cycle: 'response',
+        mainPurpose: 'keepAlive',
+        keepAlive: this.keepAlive,
+        next: this.sendBackpressuredArray.data.length > 0,
+        backpressure: this.receiveBackpressuredArray.checkSpaceAvailable(),
+      };
+    }
+
+    // feedback handling
+    if (streamTrArg.request.mainPurpose === 'feedback') {
+      streamTrArg.response = {
+        streamId: this.streamId,
+        cycleId: streamTrArg.request.cycleId,
+        cycle: 'response',
+        mainPurpose: 'feedback',
+        next: this.sendBackpressuredArray.data.length > 0,
+        backpressure: this.receiveBackpressuredArray.checkSpaceAvailable(),
+      };
+    }
+
+    // chunk handling
+    if (streamTrArg.request.mainPurpose === 'chunk') {
+      this.receiveBackpressuredArray.push(streamTrArg.request.chunkData);
+      if (this.sendBackpressuredArray.data.length > 0 && streamTrArg.response.backpressure === false) {
+        const dataArg = this.sendBackpressuredArray.shift();
+        streamTrArg.response = {
+          streamId: this.streamId,
+          cycleId: streamTrArg.request.cycleId,
+          cycle: 'response',
+          mainPurpose: 'chunk',
+          next: this.sendBackpressuredArray.data.length > 1,
+          backpressure: this.receiveBackpressuredArray.checkSpaceAvailable(),
+          chunkData: this.sendBackpressuredArray.shift(),
+        };
+      } else {
+        streamTrArg.response = {
+          streamId: this.streamId,
+          cycleId: streamTrArg.request.cycleId,
+          cycle: 'response',
+          mainPurpose: 'feedback',
+          next: this.sendBackpressuredArray.data.length > 0,
+        };
+      }
+      streamTrArg.request = null;
+    }
+
+    return streamTrArg;
+  }
+
+  // lifecycle methods
+  /**
+   * closes the virtual stream
+   */
+  public async cleanup() {
+    if (this.typedrouter) {
+      this.typedrouter.registeredVirtualStreams.remove(this);
+    }
+  }
+
+  /**
+   * a keepAlive loop that works across technologies
+   */
+  private async startKeepAliveLoop() {
+    // initially wait for a second
+    await plugins.smartdelay.delayFor(0);
+    let counter = 0;
+    keepAliveLoop: while (this.keepAlive) {
+      const triggerResult = await this.triggerKeepAlive();
+      await plugins.smartdelay.delayFor(1000);
+    }
+    await plugins.smartdelay.delayFor(1000);
+    await this.cleanup();
+    console.log(`cleaned up for stream ${this.streamId}`);
+  }
+
+  private async triggerKeepAlive() {
+    if (this.side === 'requesting') {
+      console.log(`keepalive sent.`);
+      const streamTr = await this.sendMethod({
+        method: '##VirtualStream##',
+        request: {
+          streamId: this.streamId,
+          cycleId: plugins.isounique.uni(),
+          cycle: 'request',
+          mainPurpose: 'keepAlive',
+          keepAlive: true,
+        },
+        response: null,
+      }).catch(() => {
+        this.keepAlive = false;
+      });
+
+      // lets handle keepAlive
+      if (streamTr && streamTr.response && streamTr.response.keepAlive === false) {
+        this.keepAlive = false;
+      } else {
+        this.lastKeepAliveEvent = Date.now();
+      }
+      if (streamTr && streamTr.response && streamTr.response.next) {
+        this.workOnQueue();
+      }
+    }
+    if (Date.now() - this.lastKeepAliveEvent > 10000) {
+      console.log(`closing stream for ${this.streamId}`);
+      this.keepAlive = false;
+    }
+  }
+  
+  // Data sending and receiving
+  public async sendData(dataArg: T): Promise<void> {
+    this.sendBackpressuredArray.push(dataArg);
+    this.workOnQueue();
+    await this.sendBackpressuredArray.waitForSpace();
+  }
+
+  public async fetchData(): Promise<T> {
+    if (this.receiveBackpressuredArray.hasSpace) {
+      // do something maybe?
+    }
+    await this.receiveBackpressuredArray.waitForItems();
+    const dataPackage = this.receiveBackpressuredArray.shift();
+    return dataPackage;
+  }
+
+  /**
+   * reads from a Readable and sends it to the other side
+   * @param readableStreamArg
+   */
+  public async readFromWebstream(readableStreamArg: ReadableStream<T>) {
+    const reader = readableStreamArg.getReader();
+    let streamIsDone = false;
+    while(!streamIsDone) {
+      const { value, done } = await reader.read();
+      if(value) {
+        await this.sendData(value);
+      }
+      streamIsDone = done;
+    }
+  }
+
+  public async writeToWebstream(writableStreamArg: WritableStream<T>) {
+    const writer = writableStreamArg.getWriter();
+    while(this.keepAlive) {
+      await writer.write(await this.fetchData());
+    }
+  }
+}

tsconfig.json

@@ -3,8 +3,12 @@
     "experimentalDecorators": true,
     "useDefineForClassFields": false,
     "target": "ES2022",
-    "module": "ES2022",
-    "moduleResolution": "nodenext",
-    "esModuleInterop": true
-  }
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "esModuleInterop": true,
+    "verbatimModuleSyntax": true
+  },
+  "exclude": [
+    "dist_*/**/*.d.ts"
+  ]
 }