commit

docs/ccxt/examples/html/webworker/worker.js

@@ -0,0 +1,43 @@
+self.importScripts('https://unpkg.com/ccxt@1.79.2/dist/ccxt.browser.js');
+
+console.log("Loaded ccxt version:", self.ccxt.version);
+
+var exchangeInstance = undefined;
+
+// handler of received messages
+self.onmessage = async function handler(msg) {
+  await handleMessageFromMain(msg)
+}
+
+// get messages from the main script
+async function handleMessageFromMain(msg) {
+  console.log(msg.data);
+  var [exchange, symbol, interval] = msg.data;
+  console.log('Worker received:', symbol,exchange, interval)
+  interval = parseInt(interval)
+  await processTicker(symbol, exchange)  
+  // schedule process ticker execution
+  setInterval (async () => {
+    await processTicker(symbol, exchange)  
+  }, interval)
+}
+
+async function processTicker(symbol, exchangeId) {
+  if (exchangeInstance === undefined) {
+    exchangeInstance = new ccxt[exchangeId]
+  }
+  var result = await fetchTicker(symbol)
+  var symbol = result['symbol']
+  var last = result['last']
+  var timestamp = result['timestamp']
+  var baseVolume = result['baseVolume']
+  var ourTimestamp = Date.now()
+  // send the data back to the main script
+  postMessage([symbol, last, baseVolume, timestamp, ourTimestamp]);
+}
+
+async function fetchTicker(symbol){
+  // use ccxt to fetch ticker info
+  var result = await exchangeInstance.fetchTicker(symbol)
+  return result;
+}