wallet-fetcher: fix error fetching erc-20 tokens

Signed-off-by: Alexis Pentori <alexis@status.im>

wallet-fetcher/metadata.yaml

@@ -10,7 +10,7 @@ data:
   connectorSubtype: api
   connectorType: source
   definitionId: 1e55cfe0-f591-4281-9a20-18d89d45f685
-  dockerImageTag: 0.5.0
+  dockerImageTag: 0.7.0
   dockerRepository: harbor.status.im/status-im/airbyte/wallet-fetcher
   githubIssueLabel: source-wallet-fetcher
   icon: icon.svg

wallet-fetcher/source_wallet_fetcher/source.py

@@ -1,5 +1,4 @@
 from typing import Any, Iterable, List, Mapping, MutableMapping, Optional, Tuple
-from .utils import extract_token
 from .stream import BitcoinToken, EthereumToken
 import logging
 import requests

wallet-fetcher/source_wallet_fetcher/stream.py

@@ -4,7 +4,7 @@ import logging
 import requests
 import json
 import time
-
+from .utils import extract_token
 logger = logging.getLogger("airbyte")
 
 
@@ -100,6 +100,9 @@ class EthereumToken(BlockchainStream):
                 try:
                     yield extract_token(stream_slice['name'], t)
                 except Exception as e:
-                    logger.debug('Dropping token not valid %s' % t )
+                    name = t 
+                    if 'name' in t:
+                        name= t['name']
+                    logger.warning('Dropping token %s not valid %s',name, e )
         # Delaying calls - Not great but that works
         time.sleep(2)

wallet-fetcher/source_wallet_fetcher/utils.py

@@ -8,7 +8,9 @@ def extract_token(wallet_name, token_data):
     try:
         if token_data['tokenInfo']['decimals'] == '22270923681254677845691103109158760375340177724800803888364822332811285364736':
             # The data is not valid, droping it.
-            raise Exception('Not a valid token')
+            raise Exception('Invalid token: decimal fields not valid: %s', token_data)
+        if token_data['tokenInfo']['owner'] == '0x0000000000000000000000000000000000000000':
+            raise Exception('Invalid token, owner is the void address: %s', token_data)
         token = {
             "wallet_name": wallet_name,
             "name": token_data['tokenInfo']['name'],
@@ -20,6 +22,5 @@ def extract_token(wallet_name, token_data):
             "decimal": token_data['tokenInfo']['decimals']
         }
         return token
-    except KeyError:
-        raise Exception('Not a  valid token')
-
+    except KeyError as err:
+        raise Exception('Invalid ERC-20 Token: %s', err)