wallet: automatically abandon inactive coinbase tx and their descendants during startup

Author: furszy

src/wallet/walletdb.cpp

@@ -1115,6 +1115,13 @@ static DBErrors LoadTxRecords(CWallet* pwallet, DatabaseBatch& batch, std::vecto
     });
     result = std::max(result, order_pos_res.m_result);
 
+    // After loading all tx records, abandon any coinbase that is no longer in the active chain.
+    for (auto& [id, wtx] : pwallet->mapWallet) {
+        if (wtx.IsCoinBase() && wtx.isInactive()) {
+            pwallet->AbandonTransaction(wtx);
+        }
+    }
+
     return result;
 }