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coinmarketcap.js
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'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,
'fetchL2OrderBook': 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',
'BTC',
'ETH',
'LTC',
],
});
}
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',
'Blocktrade Token': 'Blocktrade Token',
'Catcoin': 'Catcoin',
'CanYaCoin': 'CanYaCoin', // conflict with CAN (Content and AD Network)
'Comet': 'Comet', // conflict with CMT (CyberMiles)
'CPChain': 'CPChain',
'CrowdCoin': 'CrowdCoin', // conflict with CRC CryCash
'Cryptaur': 'Cryptaur', // conflict with CPT = Contents Protocol https://github.com/ccxt/ccxt/issues/4920 and https://github.com/ccxt/ccxt/issues/6081
'Cubits': 'Cubits', // conflict with QBT (Qbao)
'DAO.Casino': 'DAO.Casino', // conflict with BET (BetaCoin)
'E-Dinar Coin': 'E-Dinar Coin', // conflict with EDR Endor Protocol and EDRCoin
'EDRcoin': 'EDRcoin', // conflict with EDR Endor Protocol and E-Dinar Coin
'ENTCash': 'ENTCash', // conflict with ENT (Eternity)
'FairCoin': 'FairCoin', // conflict with FAIR (FairGame) https://github.com/ccxt/ccxt/pull/5865
'Fabric Token': 'Fabric Token',
// 'GET Protocol': 'GET Protocol',
'Global Tour Coin': 'Global Tour Coin', // conflict with GTC (Game.com)
'GuccioneCoin': 'GuccioneCoin', // conflict with GCC (Global Cryptocurrency)
'HarmonyCoin': 'HarmonyCoin', // conflict with HMC (Hi Mutual Society)
'Harvest Masternode Coin': 'Harvest Masternode Coin', // conflict with HC (HyperCash)
'HOT Token': 'HOT Token',
'Hydro Protocol': 'Hydro Protocol', // conflict with HOT (Holo)
'Huncoin': 'Huncoin', // conflict with HNC (Helleniccoin)
'iCoin': 'iCoin',
'Infinity Economics': 'Infinity Economics', // conflict with XIN (Mixin)
'KingN Coin': 'KingN Coin', // conflict with KNC (Kyber Network)
'LiteBitcoin': 'LiteBitcoin', // conflict with LBTC (LightningBitcoin)
'Maggie': 'Maggie',
'MTC Mesh Network': 'MTC Mesh Network', // conflict with MTC Docademic doc.com Token https://github.com/ccxt/ccxt/issues/6081 https://github.com/ccxt/ccxt/issues/3025
'IOTA': 'IOTA', // a special case, most exchanges list it as IOTA, therefore we change just the Coinmarketcap instead of changing them all
'NetCoin': 'NetCoin',
'PCHAIN': 'PCHAIN', // conflict with PAI (Project Pai)
'Polcoin': 'Polcoin',
'PutinCoin': 'PutinCoin', // conflict with PUT (Profile Utility Token)
'Rcoin': 'Rcoin', // conflict with RCN (Ripio Credit Network)
// https://github.com/ccxt/ccxt/issues/6081
// https://github.com/ccxt/ccxt/issues/3365
// https://github.com/ccxt/ccxt/issues/2873
'Themis': 'Themis', // conflict with GET (Guaranteed Entrance Token, GET Protocol)
};
return this.safeValue (currencies, name, base);
}
async fetchMarkets (params = {}) {
const request = {
'limit': 0,
};
const response = await this.publicGetTicker (this.extend (request, params));
const result = [];
for (let i = 0; i < response.length; i++) {
const market = response[i];
const currencies = this.currencyCodes;
for (let j = 0; j < currencies.length; j++) {
const quote = currencies[j];
const quoteId = quote.toLowerCase ();
const baseId = market['id'];
const base = this.currencyCode (market['symbol'], market['name']);
const symbol = base + '/' + quote;
const 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 ();
const request = {};
if (currency) {
request['convert'] = currency;
}
return await this.publicGetGlobal (request);
}
parseTicker (ticker, market = undefined) {
let timestamp = this.safeTimestamp (ticker, 'last_updated');
if (timestamp === undefined) {
timestamp = this.milliseconds ();
}
const change = this.safeFloat (ticker, 'percent_change_24h');
let last = undefined;
let symbol = undefined;
let volume = undefined;
if (market !== undefined) {
symbol = market['symbol'];
const priceKey = 'price_' + market['quoteId'];
last = this.safeFloat (ticker, priceKey);
const volumeKey = '24h_volume_' + market['quoteId'];
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': undefined,
'percentage': change,
'average': undefined,
'baseVolume': undefined,
'quoteVolume': volume,
'info': ticker,
};
}
async fetchTickers (currency = 'USD', params = {}) {
await this.loadMarkets ();
const request = {
'limit': 10000,
};
if (currency) {
request['convert'] = currency;
}
const response = await this.publicGetTicker (this.extend (request, params));
const result = {};
for (let t = 0; t < response.length; t++) {
const ticker = response[t];
const currencyId = currency.toLowerCase ();
const 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'];
}
result[symbol] = this.parseTicker (ticker, market);
}
return result;
}
async fetchTicker (symbol, params = {}) {
await this.loadMarkets ();
const market = this.market (symbol);
const request = {
'convert': market['quote'],
'id': market['baseId'],
};
const response = await this.publicGetTickerId (this.extend (request, params));
const ticker = response[0];
return this.parseTicker (ticker, market);
}
async fetchCurrencies (params = {}) {
const request = {
'limit': 0,
};
const response = await this.publicGetTicker (this.extend (request, params));
const result = {};
for (let i = 0; i < response.length; i++) {
const currency = response[i];
const id = this.safeString (currency, 'symbol');
const name = this.safeString (currency, 'name');
// todo: will need to rethink the fees
// to add support for multiple withdrawal/deposit methods and
// differentiated fees for each particular method
const precision = 8; // default precision, todo: fix "magic constants"
const code = this.currencyCode (id, name);
result[code] = {
'id': id,
'code': code,
'info': currency,
'name': name,
'active': true,
'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);
const 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) {
const 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;
}
};