diff --git a/src/interfaces/chain.h b/src/interfaces/chain.h
index 18d5b8f4a30..b6ea91aaa7c 100644
--- a/src/interfaces/chain.h
+++ b/src/interfaces/chain.h
@@ -244,7 +244,7 @@ public:
     //  outputs in the same transaction) or have shared ancestry, the bump fees are calculated
     //  independently, i.e. as if only one of them is spent. This may result in double-fee-bumping. This
     //  caveat can be rectified per use of the sister-function CalculateCombinedBumpFee(…).
-    virtual std::map<COutPoint, CAmount> CalculateIndividualBumpFees(const std::vector<COutPoint>& outpoints, const CFeeRate& target_feerate) = 0;
+    virtual std::map<COutPoint, CAmount> calculateIndividualBumpFees(const std::vector<COutPoint>& outpoints, const CFeeRate& target_feerate) = 0;
 
     //! Calculate the combined bump fee for an input set per the same strategy
     //  as in CalculateIndividualBumpFees(…).
@@ -252,7 +252,7 @@ public:
     //  bump fees per outpoint, but a single bump fee for the shared ancestry.
     //  The combined bump fee may be used to correct overestimation due to
     //  shared ancestry by multiple UTXOs after coin selection.
-    virtual std::optional<CAmount> CalculateCombinedBumpFee(const std::vector<COutPoint>& outpoints, const CFeeRate& target_feerate) = 0;
+    virtual std::optional<CAmount> calculateCombinedBumpFee(const std::vector<COutPoint>& outpoints, const CFeeRate& target_feerate) = 0;
 
     //! Get the node's package limits.
     //! Currently only returns the ancestor and descendant count limits, but could be enhanced to
diff --git a/src/node/interfaces.cpp b/src/node/interfaces.cpp
index 944c26f00a8..c876d9b6a7a 100644
--- a/src/node/interfaces.cpp
+++ b/src/node/interfaces.cpp
@@ -671,7 +671,7 @@ public:
         m_node.mempool->GetTransactionAncestry(txid, ancestors, descendants, ancestorsize, ancestorfees);
     }
 
-    std::map<COutPoint, CAmount> CalculateIndividualBumpFees(const std::vector<COutPoint>& outpoints, const CFeeRate& target_feerate) override
+    std::map<COutPoint, CAmount> calculateIndividualBumpFees(const std::vector<COutPoint>& outpoints, const CFeeRate& target_feerate) override
     {
         if (!m_node.mempool) {
             std::map<COutPoint, CAmount> bump_fees;
@@ -683,7 +683,7 @@ public:
         return MiniMiner(*m_node.mempool, outpoints).CalculateBumpFees(target_feerate);
     }
 
-    std::optional<CAmount> CalculateCombinedBumpFee(const std::vector<COutPoint>& outpoints, const CFeeRate& target_feerate) override
+    std::optional<CAmount> calculateCombinedBumpFee(const std::vector<COutPoint>& outpoints, const CFeeRate& target_feerate) override
     {
         if (!m_node.mempool) {
             return 0;
diff --git a/src/wallet/feebumper.cpp b/src/wallet/feebumper.cpp
index f4cb4bbd66c..f0fd789c963 100644
--- a/src/wallet/feebumper.cpp
+++ b/src/wallet/feebumper.cpp
@@ -86,7 +86,7 @@ static feebumper::Result CheckFeeRate(const CWallet& wallet, const CMutableTrans
         reused_inputs.push_back(txin.prevout);
     }
 
-    std::optional<CAmount> combined_bump_fee = wallet.chain().CalculateCombinedBumpFee(reused_inputs, newFeerate);
+    std::optional<CAmount> combined_bump_fee = wallet.chain().calculateCombinedBumpFee(reused_inputs, newFeerate);
     if (!combined_bump_fee.has_value()) {
         errors.push_back(strprintf(Untranslated("Failed to calculate bump fees, because unconfirmed UTXOs depend on enormous cluster of unconfirmed transactions.")));
     }
diff --git a/src/wallet/spend.cpp b/src/wallet/spend.cpp
index 8314a2ddfab..ed0134375c4 100644
--- a/src/wallet/spend.cpp
+++ b/src/wallet/spend.cpp
@@ -259,7 +259,7 @@ util::Result<PreSelectedInputs> FetchSelectedInputs(const CWallet& wallet, const
 {
     PreSelectedInputs result;
     const bool can_grind_r = wallet.CanGrindR();
-    std::map<COutPoint, CAmount> map_of_bump_fees = wallet.chain().CalculateIndividualBumpFees(coin_control.ListSelected(), coin_selection_params.m_effective_feerate);
+    std::map<COutPoint, CAmount> map_of_bump_fees = wallet.chain().calculateIndividualBumpFees(coin_control.ListSelected(), coin_selection_params.m_effective_feerate);
     for (const COutPoint& outpoint : coin_control.ListSelected()) {
         int input_bytes = -1;
         CTxOut txout;
@@ -453,7 +453,7 @@ CoinsResult AvailableCoins(const CWallet& wallet,
     }
 
     if (feerate.has_value()) {
-        std::map<COutPoint, CAmount> map_of_bump_fees = wallet.chain().CalculateIndividualBumpFees(outpoints, feerate.value());
+        std::map<COutPoint, CAmount> map_of_bump_fees = wallet.chain().calculateIndividualBumpFees(outpoints, feerate.value());
 
         for (auto& [_, outputs] : result.coins) {
             for (auto& output : outputs) {
@@ -725,7 +725,7 @@ util::Result<SelectionResult> ChooseSelectionResult(interfaces::Chain& chain, co
             outpoints.push_back(coin->outpoint);
             summed_bump_fees += coin->ancestor_bump_fees;
         }
-        std::optional<CAmount> combined_bump_fee = chain.CalculateCombinedBumpFee(outpoints, coin_selection_params.m_effective_feerate);
+        std::optional<CAmount> combined_bump_fee = chain.calculateCombinedBumpFee(outpoints, coin_selection_params.m_effective_feerate);
         if (!combined_bump_fee.has_value()) {
             return util::Error{_("Failed to calculate bump fees, because unconfirmed UTXOs depend on enormous cluster of unconfirmed transactions.")};
         }