@melonproject/ea-bitfinex/api/public/websocket/book.js

Integration for the Bitfinex API.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const operators_1 = require("rxjs/operators");
const bignumber_js_1 = __importDefault(require("bignumber.js"));
const socket_1 = require("./socket");
const watchBook = (options) => {
    const subProps = Object.assign(Object.assign(Object.assign({ channel: 'book', symbol: options.symbol }, (options.prec && { prec: options.prec })), (options.freq && { freq: options.freq })), (options.length && { length: options.length }));
    const subscribe = () => (Object.assign({ event: 'subscribe' }, subProps));
    return socket_1.socket(subscribe);
};
exports.watchAssetPair = (pair, options) => {
    const stream$ = watchBook(Object.assign({ symbol: `t${pair.split('/').join('')}` }, options));
    return stream$.pipe(operators_1.map(value => {
        if (Array.isArray(value[0])) {
            const snapshot = value;
            return snapshot.map(([price, count, amount]) => ({
                price: new bignumber_js_1.default(price),
                count: new bignumber_js_1.default(count),
                amount: new bignumber_js_1.default(amount),
            }));
        }
        const [price, count, amount] = value;
        return {
            price: new bignumber_js_1.default(price),
            count: new bignumber_js_1.default(count),
            amount: new bignumber_js_1.default(amount),
        };
    }));
};
exports.watchCurrency = (symbol, options) => {
    const stream$ = watchBook(Object.assign({ symbol: `f${symbol}` }, options));
    return stream$.pipe(operators_1.map(value => {
        if (Array.isArray(value[0])) {
            const snapshot = value;
            return snapshot.map(([rate, period, count, amount]) => ({
                rate: new bignumber_js_1.default(rate),
                period: new bignumber_js_1.default(period),
                count: new bignumber_js_1.default(count),
                amount: new bignumber_js_1.default(amount),
            }));
        }
        const [rate, period, count, amount] = value;
        return {
            rate: new bignumber_js_1.default(rate),
            period: new bignumber_js_1.default(period),
            count: new bignumber_js_1.default(count),
            amount: new bignumber_js_1.default(amount),
        };
    }));
};