@hackape/tardis-dev
Version:
Convenient access to tick-level historical and real-time cryptocurrency market data via Node.js
185 lines • 7.66 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.bitmexLiquidationsMapper = exports.BitmexDerivativeTickerMapper = exports.BitmexBookChangeMapper = exports.bitmexTradesMapper = void 0;
const mapper_1 = require("./mapper");
// https://www.bitmex.com/app/wsAPI
exports.bitmexTradesMapper = {
canHandle(message) {
return message.table === 'trade' && message.action === 'insert';
},
getFilters(symbols) {
return [
{
channel: 'trade',
symbols
}
];
},
*map(bitmexTradesMessage, localTimestamp) {
for (const bitmexTrade of bitmexTradesMessage.data) {
yield {
type: 'trade',
symbol: bitmexTrade.symbol,
exchange: 'bitmex',
id: bitmexTrade.trdMatchID,
price: bitmexTrade.price,
amount: bitmexTrade.size,
side: bitmexTrade.side !== undefined ? (bitmexTrade.side === 'Buy' ? 'buy' : 'sell') : 'unknown',
timestamp: new Date(bitmexTrade.timestamp),
localTimestamp: localTimestamp
};
}
}
};
class BitmexBookChangeMapper {
constructor() {
this._idToPriceLevelMap = new Map();
}
canHandle(message) {
return message.table === 'orderBookL2';
}
getFilters(symbols) {
return [
{
channel: 'orderBookL2',
symbols
}
];
}
*map(bitmexOrderBookL2Message, localTimestamp) {
let bitmexBookMessagesGrouppedBySymbol;
// only partial messages can contain different symbols (when subscribed via {"op": "subscribe", "args": ["orderBookL2"]} for example)
if (bitmexOrderBookL2Message.action === 'partial') {
bitmexBookMessagesGrouppedBySymbol = bitmexOrderBookL2Message.data.reduce((prev, current) => {
if (prev[current.symbol]) {
prev[current.symbol].push(current);
}
else {
prev[current.symbol] = [current];
}
return prev;
}, {});
}
else {
// in case of other messages types BitMEX always returns data for single symbol
bitmexBookMessagesGrouppedBySymbol = {
[bitmexOrderBookL2Message.data[0].symbol]: bitmexOrderBookL2Message.data
};
}
for (let symbol in bitmexBookMessagesGrouppedBySymbol) {
const bids = [];
const asks = [];
for (const item of bitmexBookMessagesGrouppedBySymbol[symbol]) {
// https://www.bitmex.com/app/restAPI#OrderBookL2
if (item.price !== undefined) {
// store the mapping from id to price level if price is specified
// only partials and inserts have price set
this._idToPriceLevelMap.set(item.id, item.price);
}
const price = this._idToPriceLevelMap.get(item.id);
const amount = item.size || 0; // delete messages do not have size specified
// if we still don't have a price it means that there was an update before partial message - let's skip it
if (price === undefined) {
continue;
}
if (item.side === 'Buy') {
bids.push({ price, amount });
}
else {
asks.push({ price, amount });
}
// remove meta info for deleted level
if (bitmexOrderBookL2Message.action === 'delete') {
this._idToPriceLevelMap.delete(item.id);
}
}
if (bids.length > 0 || asks.length > 0) {
const bookChange = {
type: 'book_change',
symbol,
exchange: 'bitmex',
isSnapshot: bitmexOrderBookL2Message.action === 'partial',
bids,
asks,
timestamp: localTimestamp,
localTimestamp: localTimestamp
};
yield bookChange;
}
}
}
}
exports.BitmexBookChangeMapper = BitmexBookChangeMapper;
class BitmexDerivativeTickerMapper {
constructor() {
this.pendingTickerInfoHelper = new mapper_1.PendingTickerInfoHelper();
}
canHandle(message) {
return message.table === 'instrument';
}
getFilters(symbols) {
return [
{
channel: 'instrument',
symbols
}
];
}
*map(message, localTimestamp) {
for (const bitmexInstrument of message.data) {
// process instrument messages only if:
// - we already have seen their 'partials' or already have 'pending info'
// - and instruments aren't settled or unlisted already
const isOpen = bitmexInstrument.state === undefined || bitmexInstrument.state === 'Open' || bitmexInstrument.state === 'Closed';
const isPartial = message.action === 'partial';
const hasPendingInfo = this.pendingTickerInfoHelper.hasPendingTickerInfo(bitmexInstrument.symbol);
if ((isPartial || hasPendingInfo) && isOpen) {
const pendingTickerInfo = this.pendingTickerInfoHelper.getPendingTickerInfo(bitmexInstrument.symbol, 'bitmex');
pendingTickerInfo.updateFundingRate(bitmexInstrument.fundingRate);
pendingTickerInfo.updatePredictedFundingRate(bitmexInstrument.indicativeFundingRate);
pendingTickerInfo.updateFundingTimestamp(bitmexInstrument.fundingTimestamp ? new Date(bitmexInstrument.fundingTimestamp) : undefined);
pendingTickerInfo.updateIndexPrice(bitmexInstrument.indicativeSettlePrice);
pendingTickerInfo.updateMarkPrice(bitmexInstrument.markPrice);
pendingTickerInfo.updateOpenInterest(bitmexInstrument.openInterest);
pendingTickerInfo.updateLastPrice(bitmexInstrument.lastPrice);
if (bitmexInstrument.timestamp !== undefined) {
pendingTickerInfo.updateTimestamp(new Date(bitmexInstrument.timestamp));
}
if (pendingTickerInfo.hasChanged()) {
yield pendingTickerInfo.getSnapshot(localTimestamp);
}
}
}
}
}
exports.BitmexDerivativeTickerMapper = BitmexDerivativeTickerMapper;
exports.bitmexLiquidationsMapper = {
canHandle(message) {
return message.table === 'liquidation' && message.action === 'insert';
},
getFilters(symbols) {
return [
{
channel: 'liquidation',
symbols
}
];
},
*map(bitmexLiquiationsMessage, localTimestamp) {
for (const bitmexLiquidation of bitmexLiquiationsMessage.data) {
const liquidation = {
type: 'liquidation',
symbol: bitmexLiquidation.symbol,
exchange: 'bitmex',
id: bitmexLiquidation.orderID,
price: bitmexLiquidation.price,
amount: bitmexLiquidation.leavesQty,
side: bitmexLiquidation.side === 'Buy' ? 'buy' : 'sell',
timestamp: localTimestamp,
localTimestamp: localTimestamp
};
yield liquidation;
}
}
};
//# sourceMappingURL=bitmex.js.map