52 lines
1.6 KiB
JavaScript
52 lines
1.6 KiB
JavaScript
const { utils: coinUtils } = require('@lamassu/coins')
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const _ = require('lodash/fp')
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const mem = require('mem')
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const configManager = require('./new-config-manager')
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const logger = require('./logger')
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const lastRate = {}
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const ccxt = require('./plugins/ticker/ccxt')
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const mockTicker = require('./plugins/ticker/mock-ticker')
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const bitpay = require('./plugins/ticker/bitpay')
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const FETCH_INTERVAL = 58000
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const PEGGED_FIAT_CURRENCIES = { NAD: 'ZAR' }
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function _getRates (settings, fiatCode, cryptoCode) {
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return Promise.resolve()
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.then(() => {
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const config = settings.config
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const tickerName = configManager.getWalletSettings(cryptoCode, config).ticker
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const market = [cryptoCode, fiatCode].join('-')
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return buildTicker(fiatCode, cryptoCode, tickerName)
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.then(r => {
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return lastRate[market] = {
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rates: r.rates,
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timestamp: Date.now()
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}
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})
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.catch(err => {
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logger.error(err)
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return lastRate[market]
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})
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})
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}
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function buildTicker (fiatCode, cryptoCode, tickerName) {
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fiatCode = _.defaultTo(fiatCode, _.get([fiatCode], PEGGED_FIAT_CURRENCIES))
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cryptoCode = coinUtils.getEquivalentCode(cryptoCode)
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if (tickerName === 'bitpay') return bitpay.ticker(fiatCode, cryptoCode)
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if (tickerName === 'mock-ticker') return mockTicker.ticker(fiatCode, cryptoCode)
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return ccxt.ticker(fiatCode, cryptoCode, tickerName)
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}
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const getRates = mem(_getRates, {
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maxAge: FETCH_INTERVAL,
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cacheKey: (settings, fiatCode, cryptoCode) => JSON.stringify([fiatCode, cryptoCode])
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})
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module.exports = { getRates }
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