def rate(self, pair: str) -> Decimal:
"""
Finds a conversion rate for a given symbol, this can be direct or indirect prices as long as it can find a route
to achieve this.
:param pair: A trading pair, e.g. BTC-USDT
:return A conversion rate
"""
return find_rate(self._known_rates, pair)
async def rate_async(cls, pair: str) -> Decimal:
"""
Finds a conversion rate in an async operation, it is a class method which can be used directly without having to
start the RateOracle network.
:param pair: A trading pair, e.g. BTC-USDT
:return A conversion rate
"""
prices = await cls.get_prices()
return find_rate(prices, pair)
async def global_rate(cls, token: str) -> Decimal:
"""
Finds a conversion rate of a given token to a global token
:param token: A token symbol, e.g. BTC
:return A conversion rate
"""
prices = await cls.get_prices()
pair = token + "-" + cls.global_token
return find_rate(prices, pair)
def test_find_rate(self):
prices = {"HBOT-USDT": Decimal("100"), "AAVE-USDT": Decimal("50"), "USDT-GBP": Decimal("0.75")}
rate = find_rate(prices, "HBOT-USDT")
self.assertEqual(rate, Decimal("100"))
rate = find_rate(prices, "ZBOT-USDT")
self.assertEqual(rate, None)
rate = find_rate(prices, "USDT-HBOT")
self.assertEqual(rate, Decimal("0.01"))
rate = find_rate(prices, "HBOT-AAVE")
self.assertEqual(rate, Decimal("2"))
rate = find_rate(prices, "AAVE-HBOT")
self.assertEqual(rate, Decimal("0.5"))
rate = find_rate(prices, "HBOT-GBP")
self.assertEqual(rate, Decimal("75"))
