Add more fiat currencies using fx rates from FreeCurrencyAPI

backend/src/tasks/price-feeds/free-currency-api.ts

@@ -0,0 +1,72 @@
+import { query } from '../../utils/axios-query';
+import { ConversionFeed, ConversionRates } from '../price-updater';
+
+const emptyRates = {
+  AUD: -1,
+  BGN: -1,
+  BRL: -1,
+  CAD: -1,
+  CHF: -1,
+  CNY: -1,
+  CZK: -1,
+  DKK: -1,
+  EUR: -1,
+  GBP: -1,
+  HKD: -1,
+  HRK: -1,
+  HUF: -1,
+  IDR: -1,
+  ILS: -1,
+  INR: -1,
+  ISK: -1,
+  JPY: -1,
+  KRW: -1,
+  MXN: -1,
+  MYR: -1,
+  NOK: -1,
+  NZD: -1,
+  PHP: -1,
+  PLN: -1,
+  RON: -1,
+  RUB: -1,
+  SEK: -1,
+  SGD: -1,
+  THB: -1,
+  TRY: -1,
+  ZAR: -1,
+};
+
+class FreeCurrencyApi implements ConversionFeed {
+  private API_KEY: string;
+
+  constructor(apiKey: string) {
+    this.API_KEY = apiKey;
+  }
+
+  public async $getQuota(): Promise<any> {
+    const response = await query(`https://api.freecurrencyapi.com/v1/status?apikey=${this.API_KEY}`);
+    if (response && response['quotas']) {
+      return response['quotas'];
+    }
+    return null;
+  }
+
+  public async $fetchLatestConversionRates(): Promise<ConversionRates> {
+    const response = await query(`https://api.freecurrencyapi.com/v1/latest?apikey=${this.API_KEY}`);
+    if (response && response['data']) {
+      return response['data'];
+    }
+    return emptyRates;
+  }
+
+  public async $fetchConversionRates(date: string): Promise<ConversionRates> {
+    const response = await query(`https://api.freecurrencyapi.com/v1/historical?date=${date}&apikey=${this.API_KEY}`);
+    if (response && response['data'] && response['data'][date]) {
+      return response['data'][date];
+    }
+    return emptyRates;
+  }
+
+}
+
+export default FreeCurrencyApi;