initial ws server with lookupToken

main.js

@@ -0,0 +1,25 @@
+import 'dotenv/config'
+
+import { createServer } from "http";
+import { Server } from "socket.io"
+import {lookupToken} from "./token.js";
+
+const options = {}
+if( process.env.DEXORDER_CORS )
+    options['cors'] = {origin:process.env.DEXORDER_CORS}
+const httpServer = createServer()
+const io = new Server(httpServer, options)
+
+io.on("connection", (socket) => {
+    // initially, only anonymous messages are allowed
+    socket.on('lookupToken', (chainId, address, callback) => {
+        lookupToken(chainId, address).then((result)=>callback(result)).catch(()=>callback(null))
+    })
+    // todo send known tokens or other initial config
+    socket.emit('welcome', {})
+});
+
+const port = parseInt(process.env.DEXORDER_PORT) || 3000;
+httpServer.listen(port)
+console.log('Started server on port '+port)
+console.log(options)