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docs/ccxt/examples/js/binance-server-time.js

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+
+import ccxt from '../../js/ccxt.js';
+import ololog from 'ololog'
+
+const log  = ololog.configure ({ locate: false })
+
+const binance = new ccxt['binance'] ()
+const recvWindow = binance.options.recvWindow
+const aheadWindow = 1000
+
+async function test () {
+    const localStartTime = Date.now ()
+    const { serverTime } = await binance.publicGetTime ()
+    const localFinishTime = Date.now ()
+    const estimatedLandingTime = (localFinishTime + localStartTime) / 2
+
+    const diff = serverTime - estimatedLandingTime
+
+    log (`request departure time:     ${binance.iso8601 (localStartTime)}`)
+    log (`response arrival time:      ${binance.iso8601 (localFinishTime)}`)
+    log (`server time:                ${binance.iso8601 (serverTime)}`)
+    log (`request landing time (est): ${binance.iso8601 (estimatedLandingTime)}, ${Math.abs (diff)} ms ${Math.sign (diff) > 0 ? 'behind' : 'ahead of'} server`)
+    log ('\n')
+
+    if (diff < -aheadWindow) {
+        log.error.red (`your request will likely be rejected if local time is ahead of the server's time for more than ${aheadWindow} ms \n`)
+    }
+
+    if (diff > recvWindow) {
+        log.error.red (`your request will likely be rejected if local time is behind server time for more than ${recvWindow} ms\n`)
+    }
+}
+
+test ();