chore: use monorepo organization

packages/server/lib/exchange.js

@@ -0,0 +1,82 @@
+const _ = require('lodash/fp')
+const { ALL_CRYPTOS } = require('@lamassu/coins')
+
+const configManager = require('./new-config-manager')
+const ccxt = require('./plugins/exchange/ccxt')
+const mockExchange = require('./plugins/exchange/mock-exchange')
+const accounts = require('./new-admin/config/accounts')
+
+function lookupExchange (settings, cryptoCode) {
+  const exchange = configManager.getWalletSettings(cryptoCode, settings.config).exchange
+  if (exchange === 'no-exchange') return null
+  return exchange
+}
+
+function fetchExchange (settings, cryptoCode) {
+  return Promise.resolve()
+    .then(() => {
+      const exchangeName = lookupExchange(settings, cryptoCode)
+      if (exchangeName === 'mock-exchange') return { exchangeName, account: { currencyMarket: 'EUR' } }
+      if (!exchangeName) throw new Error('No exchange set')
+      const account = settings.accounts[exchangeName]
+
+      return { exchangeName, account }
+    })
+}
+
+function buy (settings, tradeEntry) {
+  const { cryptoAtoms, fiatCode, cryptoCode } = tradeEntry
+  return fetchExchange(settings, cryptoCode)
+    .then(r => {
+      if (r.exchangeName === 'mock-exchange') {
+        return mockExchange.buy(cryptoAtoms, fiatCode, cryptoCode)
+      }
+      return ccxt.trade('buy', r.account, tradeEntry, r.exchangeName)
+    })
+}
+
+function sell (settings, tradeEntry) {
+  const { cryptoAtoms, fiatCode, cryptoCode } = tradeEntry
+  return fetchExchange(settings, cryptoCode)
+    .then(r => {
+      if (r.exchangeName === 'mock-exchange') {
+        return mockExchange.sell(cryptoAtoms, fiatCode, cryptoCode)
+      }
+      return ccxt.trade('sell', r.account, tradeEntry, r.exchangeName)
+    })
+}
+
+function active (settings, cryptoCode) {
+  return !!lookupExchange(settings, cryptoCode)
+}
+
+function getMarkets () {
+  const filterExchanges = _.filter(it => it.class === 'exchange' && !it.dev && it.code !== 'no-exchange')
+  const availableExchanges = _.map(it => it.code, filterExchanges(accounts.ACCOUNT_LIST))
+
+  const fetchMarketForExchange = exchange =>
+    ccxt.getMarkets(exchange, ALL_CRYPTOS)
+      .then(markets => ({ exchange, markets }))
+      .catch(error => ({
+        exchange,
+        markets: [],
+        error: error.message
+      }))
+
+  const transformToObject = _.reduce((acc, { exchange, markets }) => ({
+    ...acc,
+    [exchange]: markets
+  }), {})
+
+  const promises = _.map(fetchMarketForExchange, availableExchanges)
+  return Promise.all(promises)
+    .then(transformToObject)
+}
+
+module.exports = {
+  fetchExchange,
+  buy,
+  sell,
+  active,
+  getMarkets
+}