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

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)