Bugfix/fix fallback to load currencies directly from data provider (#629)

* Fix fallback

* Update changelog

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Fixed the fallback to load currencies directly from the data provider
+
 ## 1.103.0 - 13.01.2022
 
 ### Changed

apps/api/src/services/exchange-rate-data.service.ts

@@ -58,9 +58,9 @@ export class ExchangeRateDataService {
       getYesterday()
     );
 
-    if (isEmpty(result)) {
+    if (Object.keys(result).length !== this.currencyPairs.length) {
       // Load currencies directly from data provider as a fallback
-      // if historical data is not yet available
+      // if historical data is not fully available
       const historicalData = await this.dataProviderService.get(
         this.currencyPairs.map(({ dataSource, symbol }) => {
           return { dataSource, symbol };