coins: switch to coingecko api

fix #19

bot/coins.py

@@ -15,7 +15,7 @@ def _currency(name, prefix=None, suffix=None):
     return tostr
 
 class Coins(Plugin):
-    API_URL = 'https://api.cryptowat.ch/markets/{market}/{crypto}{currency}/summary'
+    API_URL = 'https://api.coingecko.com/api/v3/simple/price'
 
     CURRENCIES = {
         'usd': _currency('usd', prefix='$'),
@@ -23,60 +23,89 @@ class Coins(Plugin):
         'eth': _currency('eth', suffix='Ξ'),
         'btc': _currency('btc', suffix='฿'),
         'xmr': _currency('xmr'),
+        'xrp': _currency('xrp')
+    }
+
+    CRYPTO_IDS = {
+        'btc': 'bitcoin',
+        'eth': 'ethereum',
+        'xmr': 'monero',
+        'xrp': 'ripple'
     }
 
     @command
     def btc(self, mask: IrcString, target: IrcString, args: Dict):
-        """Gets the Bitcoin values from cryptowatch.
+        """Gets the Bitcoin values from coingecko.
 
         %%btc [<currency>]
         """
-        return self.cryptowat_summary('btc', 'coinbase', args)
+        return self.coingecko_summary('btc', args)
 
     @command
     def eth(self, mask: IrcString, target: IrcString, args: Dict):
-        """Gets the Ethereum values from cryptowatch.
+        """Gets the Ethereum values from coingecko.
 
         %%eth [<currency>]
         """
-        return self.cryptowat_summary('eth', 'coinbase', args)
+        return self.coingecko_summary('eth', args)
 
     @command
     def xmr(self, mask: IrcString, target: IrcString, args: Dict):
-        """Gets the Monero values from cryptowatch.
+        """Gets the Monero values from coingecko.
 
         %%xmr [<currency>]
         """
-        return self.cryptowat_summary('xmr', 'bitfinex', args)
+        return self.coingecko_summary('xmr', args)
+
+    @command
+    def xrp(self, mask: IrcString, target: IrcString, args: Dict):
+        """Gets the Ripple values from coingecko.
+
+        %%xrp [<currency>]
+        """
+        return self.coingecko_summary('xrp', args)
+
+    def coingecko_summary(self, crypto: str, args: Dict):
+        crypto_id = self.CRYPTO_IDS.get(crypto)
+        if crypto_id is None:
+            raise ValueError
 
-    def cryptowat_summary(self, crypto: str, market: str, args: Dict):
         currency = args.get('<currency>', 'eur').lower()
 
+        def format_response(response: str) -> str:
+            return f'\x02[{crypto.upper()}]\x02 {response}'
+
         if currency not in self.CURRENCIES or crypto == currency:
-            return '\x02[{}]\x02 Can\'t convert or invalid currency: {}'.format(crypto.upper(), currency)
+            return format_response(f'Can\'t convert or invalid currency: {currency}')
 
-        def get_data(cur):
+        res = requests.get(self.API_URL, params={
-            return requests.get(self.API_URL.format(crypto=crypto, market=market, currency=cur))
+            'ids': crypto_id,
+            'vs_currencies': currency,
+            'include_market_cap': 'true',
+            'include_24hr_vol': 'true',
+            'include_24hr_change': 'true'
+        })
 
-        data = get_data(currency)
+        if res.status_code == 429:
-        if not data and currency != 'usd':
+            return format_response('Rate Limit exceeded')
-            data = get_data('usd')
+
-            currency = 'usd'
+        if res.status_code != 200:
-        if not data:
+            return format_response('API Error')
-            return '\x02[{}]\x02 No data received'.format(crypto)
+
+        data = res.json()[crypto_id]
+
+        if currency not in data:
+            return format_response('No data received')
 
         to_currency = self.CURRENCIES[currency]
 
-        result = data.json()['result']
+        return format_response(
-        return '\x02[{crypto}]\x02 ' \
+               'Price: \x02\x0307{price}\x0F - ' \
-               'Current: \x02\x0307{last}\x0F - ' \
-               'High: \x02\x0303{high}\x0F - ' \
-               'Low: \x02\x0304{low}\x0F - ' \
                'Change: \x02\x0307{change:,.2f}%\x0F - ' \
-               'Volume: \x02\x0307{volume}\x0F' \
+               'Volume: \x02\x0307{volume}\x0F - ' \
+               'Market Cap: \x02\x0307{market_cap}\x0F' \
             .format(crypto=crypto.upper(),
-                    last=to_currency(result['price']['last']),
+                    price=to_currency(data[currency]),
-                    high=to_currency(result['price']['high']),
+                    change=data[f'{currency}_24h_change'] * 100,
-                    low=to_currency(result['price']['low']),
+                    volume=data[f'{currency}_24h_vol'],
-                    change=result['price']['change']['percentage'] * 100,
+                    market_cap=to_currency(data[f'{currency}_market_cap'])))
-                    volume=result['volume'])