diff --git a/src/interfaces/chain.h b/src/interfaces/chain.h
--- a/src/interfaces/chain.h
+++ b/src/interfaces/chain.h
@@ -8,6 +8,7 @@
 #include <optional.h>
 #include <primitives/txid.h>
 
+#include <cstddef>
 #include <cstdint>
 #include <memory>
 #include <string>
@@ -144,6 +145,11 @@
 
     //! Check if transaction has descendants in mempool.
     virtual bool hasDescendantsInMempool(const TxId &txid) = 0;
+
+    //! Calculate mempool ancestor and descendant counts for the given
+    //! transaction.
+    virtual void getTransactionAncestry(const TxId &txid, size_t &ancestors,
+                                        size_t &descendants) = 0;
 };
 
 //! Interface to let node manage chain clients (wallets, or maybe tools for
diff --git a/src/interfaces/chain.cpp b/src/interfaces/chain.cpp
--- a/src/interfaces/chain.cpp
+++ b/src/interfaces/chain.cpp
@@ -194,6 +194,10 @@
             return it_mp != ::g_mempool.mapTx.end() &&
                    it_mp->GetCountWithDescendants() > 1;
         }
+        void getTransactionAncestry(const TxId &txid, size_t &ancestors,
+                                    size_t &descendants) override {
+            ::g_mempool.GetTransactionAncestry(txid, ancestors, descendants);
+        }
     };
 
 } // namespace
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -4913,8 +4913,8 @@
             CInputCoin input_coin = output.GetInputCoin();
 
             size_t ancestors, descendants;
-            g_mempool.GetTransactionAncestry(output.tx->GetId(), ancestors,
-                                             descendants);
+            chain().getTransactionAncestry(output.tx->GetId(), ancestors,
+                                           descendants);
             if (!single_coin &&
                 ExtractDestination(output.tx->tx->vout[output.i].scriptPubKey,
                                    dst)) {