Conversion tool: added parser for Zerion explorer

New parser for the Zerion wallet/explorer, this is an easy way to import your Ethereum DeFi transactions.

This change also fixes the convert_currency method of DataParser to handle if the currency is not fiat.

CHANGELOG.md

@@ -77,6 +77,7 @@ data_source_fiat:
 - Conversion tool: added parser for BscScan explorer.
 - Conversion tool: specify the local currency of the "Value" headers.
 - Conversion tool: added parser for Exodus wallet.
+- Conversion tool: added parser for Zerion explorer.
 ### Changed
 - Conversion tool: UnknownAddressError exception changed to generic DataFilenameError.
 - Binance parser: use filename to determine if deposits or withdrawals.

bittytax/conv/dataparser.py

@@ -85,6 +85,9 @@ def parse_timestamp(cls, timestamp_str, tzinfos=None, tz=None, dayfirst=False, f
 
     @classmethod
     def convert_currency(cls, value, from_currency, timestamp):
+        if from_currency not in config.fiat_list:
+            return None
+
         if not value or value is None:
             return None
 

bittytax/conv/parsers/__init__.py

@@ -40,3 +40,4 @@
 from . import trezor
 from . import uphold
 from . import wirex
+from . import zerion

bittytax/conv/parsers/zerion.py

@@ -0,0 +1,102 @@
+# -*- coding: utf-8 -*-
+# (c) Nano Nano Ltd 2021
+
+from ..out_record import TransactionOutRecord
+from ..dataparser import DataParser
+from ..exceptions import UnexpectedTypeError
+
+WALLET = "Ethereum"
+
+def parse_zerion(data_row, parser, **_kwargs):
+    row_dict = data_row.row_dict
+    data_row.timestamp = DataParser.parse_timestamp(row_dict['Date'] + ' ' + row_dict['Time'])
+
+    # We have to strip carriage returns from fields, this is a bug in the Zerion exporter
+    if row_dict['Buy Amount']:
+        buy_quantity = row_dict['Buy Amount'].split('\n')[0]
+        buy_asset = row_dict['Buy Currency'].split('\n')[0]
+        buy_value = DataParser.convert_currency(row_dict['Buy Fiat Amount'].split('\n')[0],
+                                                row_dict['Buy Fiat Currency'].split('\n')[0],
+                                                data_row.timestamp)
+    else:
+        buy_quantity = None
+        buy_asset = ''
+        buy_value = None
+
+    if row_dict['Sell Amount']:
+        sell_quantity = row_dict['Sell Amount'].split('\n')[0]
+        sell_asset = row_dict['Sell Currency'].split('\n')[0]
+        sell_value = DataParser.convert_currency(row_dict['Sell Fiat Amount'].split('\n')[0],
+                                                 row_dict['Sell Fiat Currency'].split('\n')[0],
+                                                 data_row.timestamp)
+    else:
+        sell_quantity = None
+        sell_asset = ''
+        sell_value = None
+
+    if row_dict['Fee Amount']:
+        fee_quantity = row_dict['Fee Amount'].split('\n')[0]
+        fee_asset = row_dict['Fee Currency'].split('\n')[0]
+        fee_value = DataParser.convert_currency(row_dict['Fee Fiat Amount'].split('\n')[0],
+                                                row_dict['Fee Fiat Currency'].split('\n')[0],
+                                                data_row.timestamp)
+    else:
+        fee_quantity = None
+        fee_asset = ''
+        fee_value = None
+
+    if row_dict['Accounting Type'] == "Income":
+        data_row.t_record = TransactionOutRecord(TransactionOutRecord.TYPE_DEPOSIT,
+                                                 data_row.timestamp,
+                                                 buy_quantity=buy_quantity,
+                                                 buy_asset=buy_asset,
+                                                 buy_value=buy_value,
+                                                 fee_quantity=fee_quantity,
+                                                 fee_asset=fee_asset,
+                                                 fee_value=fee_value,
+                                                 wallet=WALLET)
+    elif row_dict['Accounting Type'] == "Spend":
+        if sell_quantity is None and fee_quantity is None:
+            return
+
+        # If a Spend only contains fees, we must include a sell of zero
+        if sell_quantity is None:
+            sell_quantity = 0
+            sell_asset = fee_asset
+
+        data_row.t_record = TransactionOutRecord(TransactionOutRecord.TYPE_WITHDRAWAL,
+                                                 data_row.timestamp,
+                                                 sell_quantity=sell_quantity,
+                                                 sell_asset=sell_asset,
+                                                 sell_value=sell_value,
+                                                 fee_quantity=fee_quantity,
+                                                 fee_asset=fee_asset,
+                                                 fee_value=fee_value,
+                                                 wallet=WALLET)
+    elif row_dict['Accounting Type'] == "Trade":
+        data_row.t_record = TransactionOutRecord(TransactionOutRecord.TYPE_TRADE,
+                                                 data_row.timestamp,
+                                                 buy_quantity=buy_quantity,
+                                                 buy_asset=buy_asset,
+                                                 buy_value=buy_value,
+                                                 sell_quantity=sell_quantity,
+                                                 sell_asset=sell_asset,
+                                                 sell_value=sell_value,
+                                                 fee_quantity=fee_quantity,
+                                                 fee_asset=fee_asset,
+                                                 fee_value=fee_value,
+                                                 wallet=WALLET)
+    else:
+        raise UnexpectedTypeError(parser.in_header.index('Accounting Type'), 'Accounting Type',
+                                  row_dict['Accounting Type'])
+
+DataParser(DataParser.TYPE_EXPLORER,
+           "Zerion (ETH Transactions)",
+           ['Date', 'Time', 'Transaction Type', 'Status', 'Application', 'Accounting Type',
+            'Buy Amount', 'Buy Currency', 'Buy Currency Address', 'Buy Fiat Amount',
+            'Buy Fiat Currency', 'Sell Amount', 'Sell Currency', 'Sell Currency Address',
+            'Sell Fiat Amount', 'Sell Fiat Currency', 'Fee Amount', 'Fee Currency',
+            'Fee Fiat Amount', 'Fee Fiat Currency', 'Sender', 'Receiver', 'Tx Hash', 'Link',
+            'Timestamp', 'Changes JSON'],
+           worksheet_name="Zerion",
+           row_handler=parse_zerion)