Add openethereum error parser, add dialect processor to config from args

chainlib/eth/cli.py

@@ -81,6 +81,11 @@ class Rpc(BaseRpc):
             else:
                 self.fee_oracle = RPCGasOracle(self.conn, id_generator=self.id_generator)
 
+        error_parser = None
+        if config.get('RPC_DIALECT') == 'openethereum':
+            from chainlib.eth.dialect.openethereum import DialectErrorParser
+            self.error_parser = DialectErrorParser()
+
         return self.conn
 
 
@@ -93,3 +98,18 @@ class Config(BaseConfig):
     """
     default_base_config_dir = os.path.join(script_dir, 'data', 'config')
     default_fee_limit = 21000
+
+
+    @classmethod
+    def from_args(cls, args, arg_flags=0x0f, env=os.environ, extra_args={}, base_config_dir=None, default_config_dir=None, user_config_dir=None, default_fee_limit=None, logger=None, load_callback=None):
+        config = BaseConfig.from_args(args, arg_flags=arg_flags, env=env, extra_args=extra_args, base_config_dir=base_config_dir, default_config_dir=default_config_dir, user_config_dir=user_config_dir, default_fee_limit=default_fee_limit, logger=logger, load_callback=load_callback)
+
+        if not config.get('RPC_DIALECT'):
+            config.add('default', 'RPC_DIALECT', exists_ok=True)
+        elif config.get('RPC_DIALECT') not in [
+                'openethereum',
+                'default',
+                ]:
+            raise ValueError('unknown rpc dialect {}'.format(config.get('RPC_DIALECT'))) 
+
+        return config

chainlib/eth/connection.py

@@ -17,10 +17,8 @@ from hexathon import (
         )
 
 # local imports
-from .error import (
-        DefaultErrorParser,
-        RevertEthException,
-        )
+from .error import RevertEthException
+from chainlib.eth.dialect import DefaultErrorParser
 from .sign import (
         sign_transaction,
         )

chainlib/eth/data/config/config.ini

@@ -3,6 +3,7 @@ http_provider = http://localhost:8545
 http_authentication = 
 http_username =
 http_password =
+dialect = default
 
 [chain]
 spec = evm:ethereum:1

chainlib/eth/dialect/__init__.py

@@ -0,0 +1,9 @@
+# local imports
+from chainlib.eth.error import EthException
+
+
+class DefaultErrorParser:
+    """Generate eth specific exception for the default json-rpc query error parser.
+    """
+    def translate(self, error):
+        return EthException('default parser code {}'.format(error))

chainlib/eth/dialect/openethereum.py

@@ -0,0 +1,17 @@
+# standard imports
+import logging
+
+# local imports
+from chainlib.eth.dialect import DefaultErrorParser
+from chainlib.error import RPCNonceException
+
+logg = logging.getLogger(__name__)
+
+
+class DialectErrorParser(DefaultErrorParser):
+
+    def translate(self, error):
+        if error['error']['code'] == -32010:
+            if 'nonce is too low' in error['error']['message']:
+                return RPCNonceException(error)
+        return super(DialectErrorParser, self).translate(error)

chainlib/eth/error.py

@@ -24,10 +24,3 @@ class RequestMismatchException(EthException):
     """Raised when a request data parser is given unexpected input data.
     """
     pass
-
-
-class DefaultErrorParser:
-    """Generate eth specific exception for the default json-rpc query error parser.
-    """
-    def translate(self, error):
-        return EthException('default parser code {}'.format(error))

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = chainlib-eth
-version = 0.0.9a4
+version = 0.0.9a5
 description = Ethereum implementation of the chainlib interface
 author = Louis Holbrook
 author_email = dev@holbrook.no