ccxt-compiled
Version:
A JavaScript / Python / PHP cryptocurrency trading library with support for 90+ exchanges
100 lines (67 loc) • 3.06 kB
JavaScript
;
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, 'depth'.cyan)
printSupportedExchanges ()
}
let printOrderBook = 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 ()
// // output a list of all market symbols
// log (id.green, 'has', exchange.symbols.length, 'symbols:', exchange.symbols.join (', ').yellow)
if (symbol in exchange.markets) {
const market = exchange.markets[symbol]
const pricePrecision = market.precision ? market.precision.price : 8
const amountPrecision = market.precision ? market.precision.amount : 8
// Object.values (markets).forEach (market => log (market))
// make a table of all markets
// const table = asTable.configure ({ delimiter: ' | ' }) (Object.values (markets))
// log (table)
const priceVolumeHelper = color => ([price, amount]) => ({
price: price.toFixed (pricePrecision)[color],
amount: amount.toFixed (amountPrecision)[color],
})
const cursorUp = '\u001b[1A'
const tableHeight = depth * 2 + 4 // bids + asks + headers
log (' ') // empty line
while (true) {
const orderbook = await exchange.fetchOrderBook (symbol)
log (symbol.green, exchange.iso8601 (exchange.milliseconds ()))
log (asTable.configure ({ delimiter: ' | '.dim, right: true }) ([
... orderbook.asks.slice (0, depth).reverse ().map (priceVolumeHelper ('red')),
// { price: '--------'.dim, amount: '--------'.dim },
... orderbook.bids.slice (0, depth).map (priceVolumeHelper ('green')),
]))
log (cursorUp.repeat (tableHeight))
}
} else {
log.error ('Symbol', symbol.bright, 'not found')
}
} else {
log ('Exchange ' + id.red + ' not found')
printSupportedExchanges ()
}
}
(async function main () {
if (process.argv.length > 4) {
const id = process.argv[2]
const symbol = process.argv[3].toUpperCase ()
const depth = parseInt (process.argv[4])
await printOrderBook (id, symbol, depth)
} else {
printUsage ()
}
process.exit ()
}) ()