@jmparsons/ccxt
Version:
A JavaScript / Python / PHP cryptocurrency trading library with support for 100+ exchanges
295 lines (280 loc) • 10.4 kB
JavaScript
'use strict';
// ---------------------------------------------------------------------------
const Exchange = require ('./base/Exchange');
const { ExchangeError } = require ('./base/errors');
// ---------------------------------------------------------------------------
module.exports = class coinmarketcap extends Exchange {
describe () {
return this.deepExtend (super.describe (), {
'id': 'coinmarketcap',
'name': 'CoinMarketCap',
'rateLimit': 10000,
'version': 'v1',
'countries': 'US',
'has': {
'CORS': true,
'privateAPI': false,
'createOrder': false,
'createMarketOrder': false,
'createLimitOrder': false,
'cancelOrder': false,
'editOrder': false,
'fetchBalance': false,
'fetchOrderBook': false,
'fetchOHLCV': false,
'fetchTrades': false,
'fetchTickers': true,
'fetchCurrencies': true,
},
'urls': {
'logo': 'https://user-images.githubusercontent.com/1294454/28244244-9be6312a-69ed-11e7-99c1-7c1797275265.jpg',
'api': {
'public': 'https://api.coinmarketcap.com',
'files': 'https://files.coinmarketcap.com',
'charts': 'https://graph.coinmarketcap.com',
},
'www': 'https://coinmarketcap.com',
'doc': 'https://coinmarketcap.com/api',
},
'requiredCredentials': {
'apiKey': false,
'secret': false,
},
'api': {
'files': {
'get': [
'generated/stats/global.json',
],
},
'graphs': {
'get': [
'currencies/{name}/',
],
},
'public': {
'get': [
'ticker/',
'ticker/{id}/',
'global/',
],
},
},
'currencyCodes': [
'AUD',
'BRL',
'CAD',
'CHF',
'CNY',
'EUR',
'GBP',
'HKD',
'IDR',
'INR',
'JPY',
'KRW',
'MXN',
'RUB',
'USD',
],
});
}
async fetchOrderBook (symbol, limit = undefined, params = {}) {
throw new ExchangeError ('Fetching order books is not supported by the API of ' + this.id);
}
currencyCode (base, name) {
const currencies = {
'ACChain': 'ACChain',
'AdCoin': 'AdCoin',
'BatCoin': 'BatCoin',
'Bitgem': 'Bitgem',
'BlazeCoin': 'BlazeCoin',
'BlockCAT': 'BlockCAT',
'Catcoin': 'Catcoin',
'Hi Mutual Society': 'Hi Mutual Society',
'iCoin': 'iCoin',
'Maggie': 'Maggie',
'MIOTA': 'IOTA', // a special case, most exchanges list it as IOTA, therefore we change just the Coinmarketcap instead of changing them all
'NetCoin': 'NetCoin',
'Polcoin': 'Polcoin',
};
if (name in currencies)
return currencies[name];
return base;
}
async fetchMarkets () {
let markets = await this.publicGetTicker ({
'limit': 0,
});
let result = [];
for (let p = 0; p < markets.length; p++) {
let market = markets[p];
let currencies = this.currencyCodes;
for (let i = 0; i < currencies.length; i++) {
let quote = currencies[i];
let quoteId = quote.toLowerCase ();
let baseId = market['id'];
let base = this.currencyCode (market['symbol'], market['name']);
let symbol = base + '/' + quote;
let id = baseId + '/' + quoteId;
result.push ({
'id': id,
'symbol': symbol,
'base': base,
'quote': quote,
'baseId': baseId,
'quoteId': quoteId,
'info': market,
});
}
}
return result;
}
async fetchGlobal (currency = 'USD') {
await this.loadMarkets ();
let request = {};
if (currency)
request['convert'] = currency;
return await this.publicGetGlobal (request);
}
parseTicker (ticker, market = undefined) {
let timestamp = this.milliseconds ();
if ('last_updated' in ticker)
if (ticker['last_updated'])
timestamp = parseInt (ticker['last_updated']) * 1000;
let change = undefined;
if ('percent_change_24h' in ticker)
if (ticker['percent_change_24h'])
change = this.safeFloat (ticker, 'percent_change_24h');
let last = undefined;
let symbol = undefined;
let volume = undefined;
if (market) {
let priceKey = 'price_' + market['quoteId'];
if (priceKey in ticker)
if (ticker[priceKey])
last = this.safeFloat (ticker, priceKey);
symbol = market['symbol'];
let volumeKey = '24h_volume_' + market['quoteId'];
if (volumeKey in ticker)
if (ticker[volumeKey])
volume = this.safeFloat (ticker, volumeKey);
}
return {
'symbol': symbol,
'timestamp': timestamp,
'datetime': this.iso8601 (timestamp),
'high': undefined,
'low': undefined,
'bid': undefined,
'bidVolume': undefined,
'ask': undefined,
'askVolume': undefined,
'vwap': undefined,
'open': undefined,
'close': last,
'last': last,
'previousClose': undefined,
'change': change,
'percentage': undefined,
'average': undefined,
'baseVolume': undefined,
'quoteVolume': volume,
'info': ticker,
};
}
async fetchTickers (currency = 'USD', params = {}) {
await this.loadMarkets ();
let request = {
'limit': 10000,
};
if (currency)
request['convert'] = currency;
let response = await this.publicGetTicker (this.extend (request, params));
let tickers = {};
for (let t = 0; t < response.length; t++) {
let ticker = response[t];
let currencyId = (currency in this.currencies) ? this.currencies[currency]['id'] : currency.toLowerCase ();
let id = ticker['id'] + '/' + currencyId;
let symbol = id;
let market = undefined;
if (id in this.markets_by_id) {
market = this.markets_by_id[id];
symbol = market['symbol'];
}
tickers[symbol] = this.parseTicker (ticker, market);
}
return tickers;
}
async fetchTicker (symbol, params = {}) {
await this.loadMarkets ();
let market = this.market (symbol);
let request = this.extend ({
'convert': market['quote'],
'id': market['baseId'],
}, params);
let response = await this.publicGetTickerId (request);
let ticker = response[0];
return this.parseTicker (ticker, market);
}
async fetchCurrencies (params = {}) {
let currencies = await this.publicGetTicker (this.extend ({
'limit': 0,
}, params));
let result = {};
for (let i = 0; i < currencies.length; i++) {
let currency = currencies[i];
let id = currency['symbol'];
let name = currency['name'];
// todo: will need to rethink the fees
// to add support for multiple withdrawal/deposit methods and
// differentiated fees for each particular method
let precision = 8; // default precision, todo: fix "magic constants"
let code = this.currencyCode (id, name);
result[code] = {
'id': id,
'code': code,
'info': currency,
'name': name,
'active': true,
'status': 'ok',
'fee': undefined, // todo: redesign
'precision': precision,
'limits': {
'amount': {
'min': Math.pow (10, -precision),
'max': Math.pow (10, precision),
},
'price': {
'min': Math.pow (10, -precision),
'max': Math.pow (10, precision),
},
'cost': {
'min': undefined,
'max': undefined,
},
'withdraw': {
'min': undefined,
'max': undefined,
},
},
};
}
return result;
}
sign (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
let url = this.urls['api'][api] + '/' + this.version + '/' + this.implodeParams (path, params);
let query = this.omit (params, this.extractParams (path));
if (Object.keys (query).length)
url += '?' + this.urlencode (query);
return { 'url': url, 'method': method, 'body': body, 'headers': headers };
}
async request (path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) {
let response = await this.fetch2 (path, api, method, params, headers, body);
if ('error' in response) {
if (response['error']) {
throw new ExchangeError (this.id + ' ' + this.json (response));
}
}
return response;
}
};