Change the fiat API to ECB, the last one turned premium...

wowlet_backend/tasks/rates_fiat.py

@@ -2,6 +2,9 @@
 # Copyright (c) 2020, The Monero Project.
 # Copyright (c) 2020, dsc@xmr.pm
 
+from datetime import datetime, timedelta
+import re
+
 from wowlet_backend.utils import httpget
 from wowlet_backend.tasks import FeatherTask
 
@@ -15,9 +18,28 @@ class FiatRatesTask(FeatherTask):
 
         self._websocket_cmd = "fiat_rates"
 
-        self._http_endpoint = "https://api.exchangeratesapi.io/latest?base=USD"
+        self._http_endpoint = "https://sdw-wsrest.ecb.europa.eu/service/data/EXR/D.USD+GBP+JPY+CZK+CAD+ZAR+KRW+MXN+RUB+SEK+THB+NZD+AUD+CHF+TRY+CNY.EUR.SP00.A"
 
     async def task(self):
         """Fetch fiat rates"""
-        result = await httpget(self._http_endpoint, json=True)
-        return result
+        start_from = "?startPeriod=" + (datetime.now() - timedelta(days=7)).strftime("%Y-%m-%d")
+        result = await httpget(self._http_endpoint + start_from, json=False)
+
+        results = {}
+        currency = ""
+        value = ""
+
+        # XML "parsing"
+        for line in result.split("\n"):
+            if "\"UNIT\"" in line:
+                if currency:
+                    results[currency] = value
+                currency = re.search(r"value=\"(\w+)\"", line).group(1)
+            if "ObsValue value" in line:
+                value = float(re.search("ObsValue value=\"([0-9.]+)\"", line).group(1))
+
+        # Base currency is EUR, needs to be USD
+        results['EUR'] = 1
+        usd_rate = results['USD']
+        results = {k: round(v / usd_rate, 4) for k, v in results.items()}
+        return results