diff --git a/fin_depo/defi_kraken.py b/fin_depo/defi_kraken.py
index 32bfa80..71a3d86 100644
--- a/fin_depo/defi_kraken.py
+++ b/fin_depo/defi_kraken.py
@@ -7,7 +7,14 @@ from decimal import Decimal
 import fin_defs
 import krakenex
 
-from .data import Depo, DepoFetcher, DepoSingle
+from .data import (
+    DepoFetcher,
+    DepoSingle,
+    DepositDetails,
+    DoubleRegister,
+    TradeOrderDetails,
+    WithdrawalDetails,
+)
 
 logger = logging.getLogger(__name__)
 
@@ -56,6 +63,23 @@ class KrakenDepoFetcher(DepoFetcher):
         )
 
 
+    def _get_withdrawals(self) -> list[WithdrawalDetails]:
+        raise NotImplementedError("_get_withdrawals is a work in progress")
+
+    def _get_deposits(self) -> list[DepositDetails]:
+        raise NotImplementedError("_get_deposits is a work in progress")
+
+    def _get_historic_spot_orders(self) -> Iterator[TradeOrderDetails]:
+        raise NotImplementedError("_get_historic_spot_orders is a work in progress")
+
+    def _get_double_registers(self) -> list[DoubleRegister]:
+        double_registers: list[DoubleRegister] = []
+        double_registers += self._get_deposits()
+        double_registers += self._get_withdrawals()
+        double_registers += self._get_historic_spot_orders()
+        double_registers.sort(key=lambda x: x.executed_time)
+        return double_registers
+
 def parse_asset_from_ticker(ticker: str) -> fin_defs.Asset:
     account = ticker.removesuffix('.HOLD')
     if account == 'ZEUR':