feat: added Uniswap v2 Factory contract (and sketch of Pool)

uniswap_sdk/v2.py

@@ -0,0 +1,32 @@
+from typing import Iterator
+
+from ape.contracts import ContractInstance
+from ape.types import AddressType
+from ape.utils import ManagerAccessMixin
+
+from .packages import V2, get_contract_instance
+
+
+class Factory(ManagerAccessMixin):
+    @property
+    def contract(self) -> ContractInstance:
+        return get_contract_instance(V2.UniswapV2Factory, self.provider.chain_id)
+
+    def get_pools(self, token: AddressType) -> Iterator["Pool"]:
+        # TODO: Use query manager to search once topic filtering is available
+        df = self.contract.PairCreated.query("event_arguments", start_block=-1000)
+        df_pairs = df.loc[(df["token0"] == token) | (df["token1"] == token)]
+        yield from map(Pool, df_pairs["pair"])
+
+    def get_all_pools(self) -> Iterator["Pool"]:
+        df = self.contract.PairCreated.query("event_arguments", start_block=-1000)
+        yield from map(Pool, df["pair"])
+
+
+class Pool(ManagerAccessMixin):
+    def __init__(self, address: AddressType):
+        self.address = address
+
+    @property
+    def contract(self) -> ContractInstance:
+        return get_contract_instance(V2.UniswapV2Factory, self.provider.chain_id)