From 9e2d2fa522f8a371f23f79a7d336b0ffa960f755 Mon Sep 17 00:00:00 2001
From: Jeppy <carsten.docktor@gmail.com>
Date: Sat, 14 May 2022 21:28:20 +0200
Subject: [PATCH] FIX Calculate `eur_subtotal` for coinbase transactions when
 it's missing in file

---
 src/book.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/book.py b/src/book.py
index 9186740..7966310 100644
--- a/src/book.py
+++ b/src/book.py
@@ -323,6 +323,12 @@ def _read_coinbase(self, file_path: Path) -> None:
                 change = misc.force_decimal(_change)
                 # `eur_subtotal` and `eur_fee` are None for withdrawals.
                 eur_subtotal = misc.xdecimal(_eur_subtotal)
+                if eur_subtotal is None:
+                    # Cost without fees from CSV is missing. This can happen for
+                    # old transactions (<2018), event though something was bought.
+                    # Calculate the `eur_subtotal` from `eur_spot`.
+                    if eur_spot := misc.xdecimal(_eur_spot):
+                        eur_subtotal = eur_spot * change
                 eur_fee = misc.xdecimal(_eur_fee)
 
                 # Validate data.