Make tycho_client a python package, small bugfixes

testing/tycho-client/tycho_client/exceptions.py

@@ -0,0 +1,59 @@
+from decimal import Decimal
+
+
+class TychoDecodeError(Exception):
+    def __init__(self, msg: str, pool_id: str):
+        super().__init__(msg)
+        self.pool_id = pool_id
+
+
+class APIRequestError(Exception):
+    pass
+
+
+class TradeSimulationException(Exception):
+    def __init__(self, message, pool_id: str):
+        self.pool_id = pool_id
+        super().__init__(message)
+
+
+class RecoverableSimulationException(TradeSimulationException):
+    """Marks that the simulation could not fully fulfill the requested order.
+
+    Provides a partial trade that is valid but does not fully fulfill the conditions
+    requested.
+
+    Parameters
+    ----------
+    message
+        Error message
+    pool_id
+        ID of a pool that caused the error
+    partial_trade
+        A tuple of (bought_amount, gas_used, new_pool_state, sold_amount)
+    """
+
+    def __init__(
+        self,
+        message,
+        pool_id: str,
+        partial_trade: tuple[Decimal, int, "ThirdPartyPool", Decimal] = None,
+    ):
+        super().__init__(message, pool_id)
+        self.partial_trade = partial_trade
+
+
+class OutOfGas(RecoverableSimulationException):
+    """This exception indicates that the underlying VM **likely** ran out of gas.
+
+    It is not easy to judge whether it was really due to out of gas, as the details
+    of the SC being called might be hiding this. E.g. out of gas may happen while
+    calling an external contract, which might show as the external call failing, although
+    it was due to a lack of gas.
+    """
+
+    pass
+
+
+class TychoClientException(Exception):
+    pass