[Fix] Allow starknet contract addresses starting with '0x0' (#1181)

Fixes #1141

src/dipdup/config/starknet.py

@@ -22,6 +22,8 @@
 
 _HEX_ADDRESS_REGEXP = re.compile(r'(0x)?[0-9a-f]{1,64}', re.IGNORECASE | re.ASCII)
 
+# Spec: https://github.com/starkware-libs/starknet-specs/blob/master/api/starknet_api_openrpc.json
+_TRUNCATED_STARKNET_ADDRESS_REGEXP = re.compile(r'^0x(0|[a-fA-F1-9]{1}[a-fA-F0-9]{0,62})$', re.ASCII)
 
 def _validate_starknet_address(v: str) -> str:
     """
@@ -32,15 +34,19 @@ def _validate_starknet_address(v: str) -> str:
         return v
 
     if _HEX_ADDRESS_REGEXP.fullmatch(v) is None:
-        raise ValueError(f'{v} is not a valid Starknet contract address')
+        raise ValueError(f'{v} is not a valid contract address (check if it is a hex string in the form 0x[64 hex chars])')
 
+    # Following code is similar to: 
+    #   https://github.com/software-mansion/starknet.py/blob/a8d73538d409d9ef7c756921e43d10925f2838bc/starknet_py/net/client_utils.py#L60
+    #   starknet_py.net.client_utils._to_rpc_felt method
+    # 
     # Convert hex to decimal and check if it's less than 2**251
     numeric_value = int(v, 16)
-    if not (numeric_value < 2**251):
+    truncated_value = hex(numeric_value)
+    if not _TRUNCATED_STARKNET_ADDRESS_REGEXP.fullmatch(truncated_value):
         raise ValueError(f'{v} is not a valid Starknet contract address')
 
-    # TODO: Probably needs to be to normalized as in EVM case
-    return v
+    return truncated_value
 
 
 type StarknetAddress = Annotated[Hex, AfterValidator(_validate_starknet_address)]

tests/configs/demo_starknet_events.yml

@@ -7,7 +7,7 @@ datasources:
     url: https://v2.archive.subsquid.io/network/starknet-mainnet
   node:
     kind: starknet.node
-    url: https://starknet-mainnet.g.alchemy.com/v2
+    url: https://starknet-mainnet.g.alchemy.com/starknet/version/rpc/v0_7/
 
 contracts:
   stark_usdt: