interfaces: Expose CreateRateBumpTransaction's orig_change_pos

Author: achow101

src/interfaces/wallet.h

@@ -173,7 +173,8 @@ class Wallet
         std::vector<bilingual_str>& errors,
         CAmount& old_fee,
         CAmount& new_fee,
-        CMutableTransaction& mtx) = 0;
+        CMutableTransaction& mtx,
+        std::optional<uint32_t> reduce_output) = 0;
 
     //! Sign bump transaction.
     virtual bool signBumpTransaction(CMutableTransaction& mtx) = 0;

src/qt/walletmodel.cpp

@@ -487,7 +487,7 @@ bool WalletModel::bumpFee(uint256 hash, uint256& new_hash)
     CAmount old_fee;
     CAmount new_fee;
     CMutableTransaction mtx;
-    if (!m_wallet->createBumpTransaction(hash, coin_control, errors, old_fee, new_fee, mtx)) {
+    if (!m_wallet->createBumpTransaction(hash, coin_control, errors, old_fee, new_fee, mtx, /*reduce_output=*/std::nullopt)) {
         QMessageBox::critical(nullptr, tr("Fee bump error"), tr("Increasing transaction fee failed") + "<br />(" +
             (errors.size() ? QString::fromStdString(errors[0].translated) : "") +")");
         return false;

src/wallet/interfaces.cpp

@@ -314,10 +314,11 @@ class WalletImpl : public Wallet
         std::vector<bilingual_str>& errors,
         CAmount& old_fee,
         CAmount& new_fee,
-        CMutableTransaction& mtx) override
+        CMutableTransaction& mtx,
+        std::optional<uint32_t> reduce_output) override
     {
         std::vector<CTxOut> outputs; // just an empty list of new recipients for now
-        return feebumper::CreateRateBumpTransaction(*m_wallet.get(), txid, coin_control, errors, old_fee, new_fee, mtx, /* require_mine= */ true, outputs) == feebumper::Result::OK;
+        return feebumper::CreateRateBumpTransaction(*m_wallet.get(), txid, coin_control, errors, old_fee, new_fee, mtx, /* require_mine= */ true, outputs, reduce_output) == feebumper::Result::OK;
     }
     bool signBumpTransaction(CMutableTransaction& mtx) override { return feebumper::SignTransaction(*m_wallet.get(), mtx); }
     bool commitBumpTransaction(const uint256& txid,