Estructura inicial del proyecto

backend/node_modules/native-duplexpair/index.js

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+'use strict';
+const Duplex = require('stream').Duplex;
+
+const kCallback = Symbol('Callback');
+const kOtherSide = Symbol('Other');
+
+class DuplexSocket extends Duplex {
+  constructor(options) {
+    super(options);
+    this[kCallback] = null;
+    this[kOtherSide] = null;
+  }
+
+  _read() {
+    const callback = this[kCallback];
+    if (callback) {
+      this[kCallback] = null;
+      callback();
+    }
+  }
+
+  _write(chunk, encoding, callback) {
+    this[kOtherSide][kCallback] = callback;
+    this[kOtherSide].push(chunk);
+  }
+
+  _final(callback) {
+    this[kOtherSide].on('end', callback);
+    this[kOtherSide].push(null);
+  }
+}
+
+class DuplexPair {
+  constructor(options) {
+    this.socket1 = new DuplexSocket(options);
+    this.socket2 = new DuplexSocket(options);
+    this.socket1[kOtherSide] = this.socket2;
+    this.socket2[kOtherSide] = this.socket1;
+  }
+}
+
+module.exports = DuplexPair;