added examples/js/live-ticker.js

examples/js/live-ticker.js

@@ -0,0 +1,70 @@
+"use strict";
+
+const asTable   = require ('as-table')
+    , log       = require ('ololog').noLocate
+    , ansi      = require ('ansicolor').nice
+    , ccxt      = require ('../../ccxt.js')
+
+let printSupportedExchanges = function () {
+    log ('Supported exchanges:', ccxt.exchanges.join (', ').green)
+}
+
+let printUsage = function () {
+    log ('Usage: node', process.argv[1], 'exchange'.green, 'symbol'.yellow)
+    printSupportedExchanges ()
+}
+
+let printTicker = async (id, symbol, depth) => {
+
+    // check if the exchange is supported by ccxt
+    let exchangeFound = ccxt.exchanges.indexOf (id) > -1
+    if (exchangeFound) {
+
+        log ('Instantiating', id.green, 'exchange')
+
+        // instantiate the exchange by id
+        let exchange = new ccxt[id] ({ enableRateLimit: true })
+
+        // load all markets from the exchange
+        let markets = await exchange.loadMarkets ()
+
+        if (symbol in exchange.markets) {
+
+            while (true) {
+
+                const ticker = await exchange.fetchTicker (symbol)
+
+                log ('--------------------------------------------------------')
+                log (exchange.id.green, symbol.yellow, exchange.iso8601 (exchange.milliseconds ()))
+                log (ccxt.omit (ticker, 'info'))
+            }
+
+        } else {
+
+            log.error ('Symbol', symbol.bright, 'not found')
+        }
+
+
+    } else {
+
+        log ('Exchange ' + id.red + ' not found')
+        printSupportedExchanges ()
+    }
+}
+
+(async function main () {
+
+    if (process.argv.length > 3) {
+
+        const id = process.argv[2]
+        const symbol = process.argv[3].toUpperCase ()
+        await printTicker (id, symbol)
+
+    } else {
+
+        printUsage ()
+    }
+
+    process.exit ()
+
+}) ()