66 lines
2.9 KiB
JavaScript
66 lines
2.9 KiB
JavaScript
const moment = require('moment');
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const request = require('request-promise');
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require('dotenv').config();
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// Source: https://apiv2.bitcoinaverage.com/
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const divisaTraceback = async(timestamp, divisa, amount) => {
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let crypto = ['BTC', 'ETH', 'LTC']
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let normal = ['USD', 'GBP', 'CNY', 'EUR'];
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if(amount > 0) {
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let divisaTraceback = {};
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let resolution = await getResolution(timestamp);
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if(crypto.includes(divisa)) {
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divisaTraceback[crypto.splice(crypto.indexOf(divisa), 1)[0]] = Number(amount);
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Object.assign(divisaTraceback, await requestIteration(normal, divisa, true, timestamp, amount, resolution));
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Object.assign(divisaTraceback, await requestIteration(crypto, 'USD', false, timestamp, divisaTraceback['USD'], resolution));
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}
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else if (normal.includes(divisa)) {
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divisaTraceback[normal.splice(normal.indexOf(divisa), 1)[0]] = Number(amount);
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Object.assign(divisaTraceback, await requestIteration(crypto, divisa, false, timestamp, amount, resolution));
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Object.assign(divisaTraceback, await requestIteration(normal, 'BTC', true, timestamp, divisaTraceback['BTC'], resolution));
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} else throw new Error('Currency target invalid');
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console.log(` Resolution: ${resolution}`);
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return(divisaTraceback);
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} else throw new Error('The amount must be 0 or higher');
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};
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const requestIteration = async(set, divisa, flag, timestamp, amount, resolution) => {
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timestamp = timestamp.format('X');
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let opt = {
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method: 'GET',
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json: true,
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headers: {
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'x-ba-key': process.env.APIKEY
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}
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};
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let res = {};
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for (element in set) {
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if(flag) {
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opt.uri = `https://apiv2.bitcoinaverage.com/indices/global/history/${divisa}${set[element]}?at=${timestamp}&resolution=${resolution}`;
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let { average, time } = await request(opt);
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res[set[element]] = average * amount;
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}
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else {
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opt.uri = `https://apiv2.bitcoinaverage.com/indices/global/history/${set[element]}${divisa}?at=${timestamp}&resolution=${resolution}`;
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let { average, time } = await request(opt);
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res[set[element]] = amount / average;
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}
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}
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return res;
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};
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const getResolution = async(timestamp) => {
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let resolution = 'day';
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if(process.env.APIMODE == 'dev') {
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if(timestamp >= moment.utc().subtract(2, 'hours')) resolution = 'minute';
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else if(timestamp >= moment().subtract(10, 'days')) resolution = 'hour';
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} else if(process.env.APIMODE == 'startup' || process.env.APIMODE == 'grow') {
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if(timestamp >= moment.utc().subtract(24, 'hours')) resolution = 'minute';
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else if(timestamp >= moment.utc().subtract(31, 'days')) resolution = 'hour';
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} else throw new Error('Bad config at .env file');
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return resolution;
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}
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module.exports = divisaTraceback; |