first commit

relay.js

@@ -0,0 +1,45 @@
+const DHT = require("@hyperswarm/dht");
+const net = require("net");
+const pump = require("pump");
+const node = new DHT({});
+module.exports = () => {
+  return {
+    serve: (keyPair, host, port) => {
+      const server = node.createServer();
+      server.on("connection", function (servsock) {
+        const socket = net.connect(port, host);
+        socket.on('serve error', console.error);
+        let open = { servsock: true, remote: true };
+        servsock.on('data', (d) => { socket.write(d) });
+        socket.on('data', (d) => { servsock.write(d) });
+
+        const remoteend = () => {
+          if (open.remote) socket.end();
+          open.remote = false;
+        }
+        const servsockend = () => {
+          if (open.servsock) servsock.end();
+          open.servsock = false;
+        }
+        servsock.on('error', remoteend)
+        servsock.on('finish', remoteend)
+        servsock.on('end', remoteend)
+        socket.on('finish', servsockend)
+        socket.on('error', servsockend)
+        socket.on('end', servsockend)
+      });
+      server.listen(keyPair);
+      return keyPair.publicKey;
+    },
+    client: (hexPublicKey, port) => {
+      const publicKey = Buffer.from(hexPublicKey, 'hex');
+      const server = net.createServer(function (local) {
+        const socket = node.connect(publicKey);
+        socket.on('client error', console.error);
+        pump(local, socket, local);
+      });
+      server.listen(port, "127.0.0.1");
+      return publicKey;
+    }
+  };
+};