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@proton/ccxt

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A JavaScript / TypeScript / Python / C# / PHP cryptocurrency trading library with support for 130+ exchanges

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// ---------------------------------------------------------------------------- // PLEASE DO NOT EDIT THIS FILE, IT IS GENERATED AND WILL BE OVERWRITTEN: // https://github.com/ccxt/ccxt/blob/master/CONTRIBUTING.md#how-to-contribute-code // EDIT THE CORRESPONDENT .ts FILE INSTEAD // --------------------------------------------------------------------------- import Exchange from './abstract/bitforex.js'; import { ExchangeError, ArgumentsRequired, AuthenticationError, OrderNotFound, InsufficientFunds, DDoSProtection, PermissionDenied, BadSymbol, InvalidOrder } from './base/errors.js'; import { TICK_SIZE } from './base/functions/number.js'; import { sha256 } from './static_dependencies/noble-hashes/sha256.js'; // --------------------------------------------------------------------------- export default class bitforex extends Exchange { describe() { return this.deepExtend(super.describe(), { 'id': 'bitforex', 'name': 'Bitforex', 'countries': ['CN'], 'rateLimit': 500, 'version': 'v1', 'has': { 'CORS': undefined, 'spot': true, 'margin': false, 'swap': undefined, 'future': false, 'option': false, 'cancelOrder': true, 'createOrder': true, 'createStopLimitOrder': false, 'createStopMarketOrder': false, 'createStopOrder': false, 'fetchBalance': true, 'fetchBorrowRate': false, 'fetchBorrowRateHistories': false, 'fetchBorrowRateHistory': false, 'fetchBorrowRates': false, 'fetchBorrowRatesPerSymbol': false, 'fetchClosedOrders': true, 'fetchMarginMode': false, 'fetchMarkets': true, 'fetchMyTrades': true, 'fetchOHLCV': true, 'fetchOpenOrders': true, 'fetchOrder': true, 'fetchOrderBook': true, 'fetchPositionMode': false, 'fetchTicker': true, 'fetchTickers': false, 'fetchTrades': true, 'fetchTransactionFees': false, 'fetchTransfer': false, 'fetchTransfers': false, 'fetchWithdrawal': false, 'fetchWithdrawals': false, 'transfer': false, 'withdraw': false, }, 'timeframes': { '1m': '1min', '5m': '5min', '15m': '15min', '30m': '30min', '1h': '1hour', '2h': '2hour', '4h': '4hour', '12h': '12hour', '1d': '1day', '1w': '1week', '1M': '1month', }, 'urls': { 'logo': 'https://user-images.githubusercontent.com/51840849/87295553-1160ec00-c50e-11ea-8ea0-df79276a9646.jpg', 'api': { 'rest': 'https://api.bitforex.com', }, 'www': 'https://www.bitforex.com', 'doc': 'https://github.com/githubdev2020/API_Doc_en/wiki', 'fees': 'https://help.bitforex.com/en_us/?cat=13', 'referral': 'https://www.bitforex.com/en/invitationRegister?inviterId=1867438', }, 'api': { 'public': { 'get': { '/api/v1/ping': 0.2, '/api/v1/time': 0.2, 'api/v1/market/symbols': 20, 'api/v1/market/ticker': 4, 'api/v1/market/ticker-all': 4, 'api/v1/market/depth': 4, 'api/v1/market/depth-all': 4, 'api/v1/market/trades': 20, 'api/v1/market/kline': 20, }, }, 'private': { 'post': { 'api/v1/fund/mainAccount': 1, 'api/v1/fund/allAccount': 30, 'api/v1/trade/placeOrder': 1, 'api/v1/trade/placeMultiOrder': 10, 'api/v1/trade/cancelOrder': 1, 'api/v1/trade/cancelMultiOrder': 6.67, 'api/v1/trade/cancelAllOrder': 20, 'api/v1/trade/orderInfo': 1, 'api/v1/trade/multiOrderInfo': 10, 'api/v1/trade/orderInfos': 20, 'api/v1/trade/myTrades': 2, }, }, }, 'fees': { 'trading': { 'tierBased': false, 'percentage': true, 'maker': this.parseNumber('0.001'), 'taker': this.parseNumber('0.001'), }, 'funding': { 'tierBased': false, 'percentage': true, 'deposit': {}, 'withdraw': {}, }, }, 'commonCurrencies': { 'BKC': 'Bank Coin', 'CAPP': 'Crypto Application Token', 'CREDIT': 'TerraCredit', 'CTC': 'Culture Ticket Chain', 'EWT': 'EcoWatt Token', 'IQ': 'IQ.Cash', 'MIR': 'MIR COIN', 'NOIA': 'METANOIA', 'TON': 'To The Moon', }, 'precisionMode': TICK_SIZE, 'exceptions': { '1000': OrderNotFound, '1003': BadSymbol, '1013': AuthenticationError, '1016': AuthenticationError, '1017': PermissionDenied, '1019': BadSymbol, '3002': InsufficientFunds, '4002': InvalidOrder, '4003': InvalidOrder, '4004': OrderNotFound, '10204': DDoSProtection, }, }); } async fetchMarkets(params = {}) { /** * @method * @name bitforex#fetchMarkets * @description retrieves data on all markets for bitforex * @param {object} params extra parameters specific to the exchange api endpoint * @returns {[object]} an array of objects representing market data */ const response = await this.publicGetApiV1MarketSymbols(params); // // { // "data": [ // { // "amountPrecision":4, // "minOrderAmount":3.0E-4, // "pricePrecision":2, // "symbol":"coin-usdt-btc" // }, // ... // ] // } // const data = response['data']; const result = []; for (let i = 0; i < data.length; i++) { const market = data[i]; const id = this.safeString(market, 'symbol'); const symbolParts = id.split('-'); const baseId = symbolParts[2]; const quoteId = symbolParts[1]; const base = this.safeCurrencyCode(baseId); const quote = this.safeCurrencyCode(quoteId); result.push({ 'id': id, 'symbol': base + '/' + quote, 'base': base, 'quote': quote, 'settle': undefined, 'baseId': baseId, 'quoteId': quoteId, 'settleId': undefined, 'type': 'spot', 'spot': true, 'margin': false, 'swap': false, 'future': false, 'option': false, 'active': true, 'contract': false, 'linear': undefined, 'inverse': undefined, 'contractSize': undefined, 'expiry': undefined, 'expiryDateTime': undefined, 'strike': undefined, 'optionType': undefined, 'precision': { 'amount': this.parseNumber(this.parsePrecision(this.safeString(market, 'amountPrecision'))), 'price': this.parseNumber(this.parsePrecision(this.safeString(market, 'pricePrecision'))), }, 'limits': { 'leverage': { 'min': undefined, 'max': undefined, }, 'amount': { 'min': this.safeNumber(market, 'minOrderAmount'), 'max': undefined, }, 'price': { 'min': undefined, 'max': undefined, }, 'cost': { 'min': undefined, 'max': undefined, }, }, 'info': market, }); } return result; } parseTrade(trade, market = undefined) { // // fetchTrades (public) v1 // // { // "price":57594.53, // "amount":0.3172, // "time":1637329685322, // "direction":1, // "tid":"1131019666" // } // // { // "price":57591.33, // "amount":0.002, // "time":1637329685322, // "direction":1, // "tid":"1131019639" // } // // fetchMyTrades (private) // // { // "symbol": "coin-usdt-babydoge", // "tid": 7289, // "orderId": "b6fe2b61-e5cb-4970-9bdc-8c7cd1fcb4d8", // "price": "0.000007", // "amount": "50000000", // "tradeFee": "50000", // "tradeFeeCurrency": "babydoge", // "time": "1684750536460", // "isBuyer": true, // "isMaker": true, // "isSelfTrade": true // } // const marketId = this.safeString(trade, 'symbol'); market = this.safeMarket(marketId, market); const timestamp = this.safeInteger(trade, 'time'); const id = this.safeString(trade, 'tid'); const orderId = this.safeString(trade, 'orderId'); const priceString = this.safeString(trade, 'price'); const amountString = this.safeString(trade, 'amount'); const sideId = this.safeInteger(trade, 'direction'); let side = this.parseSide(sideId); if (side === undefined) { const isBuyer = this.safeValue(trade, 'isBuyer'); side = isBuyer ? 'buy' : 'sell'; } let takerOrMaker = undefined; const isMaker = this.safeValue(trade, 'isMaker'); if (isMaker !== undefined) { takerOrMaker = (isMaker) ? 'maker' : 'taker'; } let fee = undefined; const feeCostString = this.safeString(trade, 'tradeFee'); if (feeCostString !== undefined) { const feeCurrencyId = this.safeString(trade, 'tradeFeeCurrency'); const feeCurrencyCode = this.safeCurrencyCode(feeCurrencyId); fee = { 'cost': feeCostString, 'currency': feeCurrencyCode, }; } return this.safeTrade({ 'info': trade, 'id': id, 'timestamp': timestamp, 'datetime': this.iso8601(timestamp), 'symbol': market['symbol'], 'type': undefined, 'side': side, 'price': priceString, 'amount': amountString, 'cost': undefined, 'order': orderId, 'fee': fee, 'takerOrMaker': takerOrMaker, }, market); } async fetchTrades(symbol, since = undefined, limit = undefined, params = {}) { /** * @method * @name bitforex#fetchTrades * @description get the list of most recent trades for a particular symbol * @param {string} symbol unified symbol of the market to fetch trades for * @param {int|undefined} since timestamp in ms of the earliest trade to fetch * @param {int|undefined} limit the maximum amount of trades to fetch * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {[object]} a list of [trade structures]{@link https://docs.ccxt.com/en/latest/manual.html?#public-trades} */ await this.loadMarkets(); const request = { 'symbol': this.marketId(symbol), }; if (limit !== undefined) { request['size'] = limit; } const market = this.market(symbol); const response = await this.publicGetApiV1MarketTrades(this.extend(request, params)); // // { // "data": // [ // { // "price":57594.53, // "amount":0.3172, // "time":1637329685322, // "direction":1, // "tid":"1131019666" // } // ], // "success": true, // "time": 1637329688475 // } // return this.parseTrades(response['data'], market, since, limit); } async fetchMyTrades(symbol = undefined, since = undefined, limit = undefined, params = {}) { /** * @method * @name bitforex#fetchMyTrades * @description fetch all trades made by the user * @see https://apidoc.bitforex.com/#spot-account-trade * @param {string|undefined} symbol unified market symbol * @param {int|undefined} since the earliest time in ms to fetch trades for * @param {int|undefined} limit the maximum number of trades structures to retrieve * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {[object]} a list of [trade structures]{@link https://docs.ccxt.com/#/?id=trade-structure} */ this.checkRequiredSymbol('fetchMyTrades', symbol); await this.loadMarkets(); const request = { // 'symbol': market['id'], // 'orderId': orderId, // 'startTime': timestamp, // 'endTime': timestamp, // 'limit': limit, // default 500, max 1000 }; const market = this.market(symbol); request['symbol'] = market['id']; if (limit !== undefined) { request['limit'] = limit; } if (since !== undefined) { request['startTime'] = Math.max(since - 1, 0); } const endTime = this.safeInteger2(params, 'until', 'endTime'); if (endTime !== undefined) { request['endTime'] = endTime; } params = this.omit(params, ['until']); const response = await this.privatePostApiV1TradeMyTrades(this.extend(request, params)); // // { // "data": [ // { // "symbol": "coin-usdt-babydoge", // "tid": 7289, // "orderId": "a262d030-11a5-40fd-a07c-7ba84aa68752", // "price": "0.000007", // "amount": "50000000", // "tradeFee": "0.35", // "tradeFeeCurrency": "usdt", // "time": "1684750536460", // "isBuyer": false, // "isMaker": false, // "isSelfTrade": true // } // ], // "success": true, // "time": 1685009320042 // } // const data = this.safeValue(response, 'data', []); return this.parseTrades(data, market, since, limit); } parseBalance(response) { const data = response['data']; const result = { 'info': response }; for (let i = 0; i < data.length; i++) { const balance = data[i]; const currencyId = this.safeString(balance, 'currency'); const code = this.safeCurrencyCode(currencyId); const account = this.account(); account['used'] = this.safeString(balance, 'frozen'); account['free'] = this.safeString(balance, 'active'); account['total'] = this.safeString(balance, 'fix'); result[code] = account; } return this.safeBalance(result); } async fetchBalance(params = {}) { /** * @method * @name bitforex#fetchBalance * @description query for balance and get the amount of funds available for trading or funds locked in orders * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {object} a [balance structure]{@link https://docs.ccxt.com/en/latest/manual.html?#balance-structure} */ await this.loadMarkets(); const response = await this.privatePostApiV1FundAllAccount(params); return this.parseBalance(response); } parseTicker(ticker, market = undefined) { // // { // "buy":7.04E-7, // "date":1643371198598, // "high":7.48E-7, // "last":7.28E-7, // "low":7.10E-7, // "sell":7.54E-7, // "vol":9877287.2874 // } // const symbol = this.safeSymbol(undefined, market); const timestamp = this.safeInteger(ticker, 'date'); return this.safeTicker({ 'symbol': symbol, 'timestamp': timestamp, 'datetime': this.iso8601(timestamp), 'high': this.safeString(ticker, 'high'), 'low': this.safeString(ticker, 'low'), 'bid': this.safeString(ticker, 'buy'), 'bidVolume': undefined, 'ask': this.safeString(ticker, 'sell'), 'askVolume': undefined, 'vwap': undefined, 'open': undefined, 'close': this.safeString(ticker, 'last'), 'last': this.safeString(ticker, 'last'), 'previousClose': undefined, 'change': undefined, 'percentage': undefined, 'average': undefined, 'baseVolume': this.safeString(ticker, 'vol'), 'quoteVolume': undefined, 'info': ticker, }, market); } async fetchTicker(symbol, params = {}) { /** * @method * @name bitforex#fetchTicker * @description fetches a price ticker, a statistical calculation with the information calculated over the past 24 hours for a specific market * @param {string} symbol unified symbol of the market to fetch the ticker for * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {object} a [ticker structure]{@link https://docs.ccxt.com/#/?id=ticker-structure} */ await this.loadMarkets(); const market = this.markets[symbol]; const request = { 'symbol': market['id'], }; const response = await this.publicGetApiV1MarketTickerAll(this.extend(request, params)); const ticker = this.safeValue(response, 'data'); // // { // "data":{ // "buy":37082.83, // "date":1643388686660, // "high":37487.83, // "last":37086.79, // "low":35544.44, // "sell":37090.52, // "vol":690.9776 // }, // "success":true, // "time":1643388686660 // } // return this.parseTicker(ticker, market); } parseOHLCV(ohlcv, market = undefined) { // // { // "close":0.02505143, // "currencyVol":0, // "high":0.02506422, // "low":0.02505143, // "open":0.02506095, // "time":1591508940000, // "vol":51.1869 // } // return [ this.safeInteger(ohlcv, 'time'), this.safeNumber(ohlcv, 'open'), this.safeNumber(ohlcv, 'high'), this.safeNumber(ohlcv, 'low'), this.safeNumber(ohlcv, 'close'), this.safeNumber(ohlcv, 'vol'), ]; } async fetchOHLCV(symbol, timeframe = '1m', since = undefined, limit = undefined, params = {}) { /** * @method * @name bitforex#fetchOHLCV * @description fetches historical candlestick data containing the open, high, low, and close price, and the volume of a market * @param {string} symbol unified symbol of the market to fetch OHLCV data for * @param {string} timeframe the length of time each candle represents * @param {int|undefined} since timestamp in ms of the earliest candle to fetch * @param {int|undefined} limit the maximum amount of candles to fetch * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {[[int]]} A list of candles ordered as timestamp, open, high, low, close, volume */ await this.loadMarkets(); const market = this.market(symbol); const request = { 'symbol': market['id'], 'ktype': this.safeString(this.timeframes, timeframe, timeframe), }; if (limit !== undefined) { request['size'] = limit; // default 1, max 600 } const response = await this.publicGetApiV1MarketKline(this.extend(request, params)); // // { // "data":[ // {"close":0.02505143,"currencyVol":0,"high":0.02506422,"low":0.02505143,"open":0.02506095,"time":1591508940000,"vol":51.1869}, // {"close":0.02503914,"currencyVol":0,"high":0.02506687,"low":0.02503914,"open":0.02505358,"time":1591509000000,"vol":9.1082}, // {"close":0.02505172,"currencyVol":0,"high":0.02507466,"low":0.02503895,"open":0.02506371,"time":1591509060000,"vol":63.7431}, // ], // "success":true, // "time":1591509427131 // } // const data = this.safeValue(response, 'data', []); return this.parseOHLCVs(data, market, timeframe, since, limit); } async fetchOrderBook(symbol, limit = undefined, params = {}) { /** * @method * @name bitforex#fetchOrderBook * @description fetches information on open orders with bid (buy) and ask (sell) prices, volumes and other data * @param {string} symbol unified symbol of the market to fetch the order book for * @param {int|undefined} limit the maximum amount of order book entries to return * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {object} A dictionary of [order book structures]{@link https://docs.ccxt.com/#/?id=order-book-structure} indexed by market symbols */ await this.loadMarkets(); const market = this.market(symbol); const request = { 'symbol': market['id'], }; if (limit !== undefined) { request['size'] = limit; } const response = await this.publicGetApiV1MarketDepthAll(this.extend(request, params)); const data = this.safeValue(response, 'data'); const timestamp = this.safeInteger(response, 'time'); return this.parseOrderBook(data, market['symbol'], timestamp, 'bids', 'asks', 'price', 'amount'); } parseOrderStatus(status) { const statuses = { '0': 'open', '1': 'open', '2': 'closed', '3': 'canceled', '4': 'canceled', }; return (status in statuses) ? statuses[status] : status; } parseSide(sideId) { if (sideId === 1) { return 'buy'; } else if (sideId === 2) { return 'sell'; } else { return undefined; } } parseOrder(order, market = undefined) { const id = this.safeString(order, 'orderId'); const timestamp = this.safeNumber(order, 'createTime'); const lastTradeTimestamp = this.safeNumber(order, 'lastTime'); const symbol = market['symbol']; const sideId = this.safeInteger(order, 'tradeType'); const side = this.parseSide(sideId); const type = undefined; const price = this.safeString(order, 'orderPrice'); const average = this.safeString(order, 'avgPrice'); const amount = this.safeString(order, 'orderAmount'); const filled = this.safeString(order, 'dealAmount'); const status = this.parseOrderStatus(this.safeString(order, 'orderState')); const feeSide = (side === 'buy') ? 'base' : 'quote'; const feeCurrency = market[feeSide]; const fee = { 'cost': this.safeNumber(order, 'tradeFee'), 'currency': feeCurrency, }; return this.safeOrder({ 'info': order, 'id': id, 'clientOrderId': undefined, 'timestamp': timestamp, 'datetime': this.iso8601(timestamp), 'lastTradeTimestamp': lastTradeTimestamp, 'symbol': symbol, 'type': type, 'timeInForce': undefined, 'postOnly': undefined, 'side': side, 'price': price, 'stopPrice': undefined, 'triggerPrice': undefined, 'cost': undefined, 'average': average, 'amount': amount, 'filled': filled, 'remaining': undefined, 'status': status, 'fee': fee, 'trades': undefined, }, market); } async fetchOrder(id, symbol = undefined, params = {}) { /** * @method * @name bitforex#fetchOrder * @description fetches information on an order made by the user * @param {string|undefined} symbol unified symbol of the market the order was made in * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {object} An [order structure]{@link https://docs.ccxt.com/#/?id=order-structure} */ await this.loadMarkets(); const market = this.market(symbol); const request = { 'symbol': this.marketId(symbol), 'orderId': id, }; const response = await this.privatePostApiV1TradeOrderInfo(this.extend(request, params)); const order = this.parseOrder(response['data'], market); return order; } async fetchOpenOrders(symbol = undefined, since = undefined, limit = undefined, params = {}) { /** * @method * @name bitforex#fetchOpenOrders * @description fetch all unfilled currently open orders * @param {string} symbol unified market symbol * @param {int|undefined} since the earliest time in ms to fetch open orders for * @param {int|undefined} limit the maximum number of open orders structures to retrieve * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {[object]} a list of [order structures]{@link https://docs.ccxt.com/#/?id=order-structure} */ if (symbol === undefined) { throw new ArgumentsRequired(this.id + ' fetchMyTrades() requires a symbol argument'); } await this.loadMarkets(); const market = this.market(symbol); const request = { 'symbol': this.marketId(symbol), 'state': 0, }; const response = await this.privatePostApiV1TradeOrderInfos(this.extend(request, params)); return this.parseOrders(response['data'], market, since, limit); } async fetchClosedOrders(symbol = undefined, since = undefined, limit = undefined, params = {}) { /** * @method * @name bitforex#fetchClosedOrders * @description fetches information on multiple closed orders made by the user * @param {string|undefined} symbol unified market symbol of the market orders were made in * @param {int|undefined} since the earliest time in ms to fetch orders for * @param {int|undefined} limit the maximum number of orde structures to retrieve * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {[object]} a list of [order structures]{@link https://docs.ccxt.com/#/?id=order-structure} */ if (symbol === undefined) { throw new ArgumentsRequired(this.id + ' fetchMyTrades() requires a symbol argument'); } await this.loadMarkets(); const market = this.market(symbol); const request = { 'symbol': this.marketId(symbol), 'state': 1, }; const response = await this.privatePostApiV1TradeOrderInfos(this.extend(request, params)); return this.parseOrders(response['data'], market, since, limit); } async createOrder(symbol, type, side, amount, price = undefined, params = {}) { /** * @method * @name bitforex#createOrder * @description create a trade order * @param {string} symbol unified symbol of the market to create an order in * @param {string} type 'market' or 'limit' * @param {string} side 'buy' or 'sell' * @param {float} amount how much of currency you want to trade in units of base currency * @param {float|undefined} price the price at which the order is to be fullfilled, in units of the quote currency, ignored in market orders * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {object} an [order structure]{@link https://docs.ccxt.com/#/?id=order-structure} */ await this.loadMarkets(); let sideId = undefined; if (side === 'buy') { sideId = 1; } else if (side === 'sell') { sideId = 2; } const market = this.market(symbol); const request = { 'symbol': market['id'], 'price': price, 'amount': amount, 'tradeType': sideId, }; const response = await this.privatePostApiV1TradePlaceOrder(this.extend(request, params)); const data = response['data']; return this.safeOrder({ 'info': response, 'id': this.safeString(data, 'orderId'), }, market); } async cancelOrder(id, symbol = undefined, params = {}) { /** * @method * @name bitforex#cancelOrder * @description cancels an open order * @param {string} id order id * @param {string|undefined} symbol unified symbol of the market the order was made in * @param {object} params extra parameters specific to the bitforex api endpoint * @returns {object} An [order structure]{@link https://docs.ccxt.com/#/?id=order-structure} */ await this.loadMarkets(); const request = { 'orderId': id, }; if (symbol !== undefined) { request['symbol'] = this.marketId(symbol); } const results = await this.privatePostApiV1TradeCancelOrder(this.extend(request, params)); const success = results['success']; const returnVal = { 'info': results, 'success': success }; return returnVal; } sign(path, api = 'public', method = 'GET', params = {}, headers = undefined, body = undefined) { let url = this.urls['api']['rest'] + '/' + this.implodeParams(path, params); const query = this.omit(params, this.extractParams(path)); if (api === 'public') { if (Object.keys(query).length) { url += '?' + this.urlencode(query); } } else { this.checkRequiredCredentials(); let payload = this.urlencode({ 'accessKey': this.apiKey }); query['nonce'] = this.milliseconds(); if (Object.keys(query).length) { payload += '&' + this.urlencode(this.keysort(query)); } // let message = '/' + 'api/' + this.version + '/' + path + '?' + payload; const message = '/' + path + '?' + payload; const signature = this.hmac(this.encode(message), this.encode(this.secret), sha256); body = payload + '&signData=' + signature; headers = { 'Content-Type': 'application/x-www-form-urlencoded', }; } return { 'url': url, 'method': method, 'body': body, 'headers': headers }; } handleErrors(code, reason, url, method, headers, body, response, requestHeaders, requestBody) { if (typeof body !== 'string') { return undefined; // fallback to default error handler } if ((body[0] === '{') || (body[0] === '[')) { const feedback = this.id + ' ' + body; const success = this.safeValue(response, 'success'); if (success !== undefined) { if (!success) { const codeInner = this.safeString(response, 'code'); this.throwExactlyMatchedException(this.exceptions, codeInner, feedback); throw new ExchangeError(feedback); } } } return undefined; } }