Make keccak and cheksum caches unlimited

- Can be limited via environment variable

gnosis/eth/utils.py

@@ -1,3 +1,4 @@
+import os
 from functools import lru_cache
 from typing import Union
 
@@ -21,15 +22,19 @@ def get_empty_tx_params() -> TxParams:
     }
 
 
-@lru_cache(maxsize=8192)
+@lru_cache(maxsize=os.environ.get("CACHE_KECCAK", None))
+def _keccak_256(value: bytes) -> bytes:
+    return keccak_256(value)
+
+
 def fast_keccak(value: bytes) -> Hash32:
     """
     Calculates ethereum keccak256 using fast library `pysha3`
 
     :param value:
     :return: Keccak256 used by ethereum as `HexBytes`
     """
-    return HexBytes(keccak_256(value).digest())
+    return HexBytes(_keccak_256(value).digest())
 
 
 def fast_keccak_text(value: str) -> Hash32:
@@ -50,7 +55,7 @@ def fast_keccak_hex(value: bytes) -> HexStr:
     :param value:
     :return: Keccak256 used by ethereum as a hex string (not 0x prefixed)
     """
-    return HexStr(keccak_256(value).hexdigest())
+    return HexStr(_keccak_256(value).hexdigest())
 
 
 def _build_checksum_address(
@@ -82,7 +87,7 @@ def _build_checksum_address(
     )
 
 
-@lru_cache(maxsize=8192)
+@lru_cache(maxsize=os.environ.get("CACHE_CHECKSUM_ADDRESS", None))
 def _fast_to_checksum_address(address: HexAddress):
     address_hash = fast_keccak_hex(address.encode())
     return _build_checksum_address(address, address_hash)