diff --git a/src/qt/forms/sendcoinsdialog.ui b/src/qt/forms/sendcoinsdialog.ui
index 2dc126f8b..b6bf0700e 100644
--- a/src/qt/forms/sendcoinsdialog.ui
+++ b/src/qt/forms/sendcoinsdialog.ui
@@ -1,1192 +1,1173 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>SendCoinsDialog</class>
  <widget class="QDialog" name="SendCoinsDialog">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>850</width>
     <height>526</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Send Coins</string>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout" stretch="0,1,0,0">
    <property name="bottomMargin">
     <number>8</number>
    </property>
    <item>
     <widget class="QFrame" name="frameCoinControl">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="maximumSize">
       <size>
        <width>16777215</width>
        <height>16777215</height>
       </size>
      </property>
      <property name="frameShape">
       <enum>QFrame::StyledPanel</enum>
      </property>
      <property name="frameShadow">
       <enum>QFrame::Sunken</enum>
      </property>
      <layout class="QVBoxLayout" name="verticalLayoutCoinControl2">
       <property name="spacing">
        <number>0</number>
       </property>
       <property name="leftMargin">
        <number>0</number>
       </property>
       <property name="topMargin">
        <number>0</number>
       </property>
       <property name="rightMargin">
        <number>0</number>
       </property>
       <property name="bottomMargin">
        <number>6</number>
       </property>
       <item>
        <layout class="QVBoxLayout" name="verticalLayoutCoinControl" stretch="0,0,0,0,1">
         <property name="spacing">
          <number>0</number>
         </property>
         <property name="leftMargin">
          <number>10</number>
         </property>
         <property name="topMargin">
          <number>10</number>
         </property>
         <item>
          <layout class="QHBoxLayout" name="horizontalLayoutCoinControl1">
           <property name="bottomMargin">
            <number>15</number>
           </property>
           <item>
            <widget class="QLabel" name="labelCoinControlFeatures">
             <property name="sizePolicy">
              <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
              </sizepolicy>
             </property>
             <property name="font">
              <font>
               <weight>75</weight>
               <bold>true</bold>
              </font>
             </property>
             <property name="styleSheet">
              <string notr="true">font-weight:bold;</string>
             </property>
             <property name="text">
              <string>Coin Control Features</string>
             </property>
            </widget>
           </item>
          </layout>
         </item>
         <item>
          <layout class="QHBoxLayout" name="horizontalLayoutCoinControl2" stretch="0,0,0,0">
           <property name="spacing">
            <number>8</number>
           </property>
           <property name="bottomMargin">
            <number>10</number>
           </property>
           <item>
            <widget class="QPushButton" name="pushButtonCoinControl">
             <property name="styleSheet">
              <string notr="true"/>
             </property>
             <property name="text">
              <string>Inputs...</string>
             </property>
             <property name="autoDefault">
              <bool>false</bool>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="labelCoinControlAutomaticallySelected">
             <property name="text">
              <string>automatically selected</string>
             </property>
             <property name="margin">
              <number>5</number>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="labelCoinControlInsuffFunds">
             <property name="font">
              <font>
               <weight>75</weight>
               <bold>true</bold>
              </font>
             </property>
             <property name="styleSheet">
              <string notr="true">color:red;font-weight:bold;</string>
             </property>
             <property name="text">
              <string>Insufficient funds!</string>
             </property>
             <property name="margin">
              <number>5</number>
             </property>
            </widget>
           </item>
           <item>
            <spacer name="horizontalSpacerCoinControl">
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>40</width>
               <height>1</height>
              </size>
             </property>
            </spacer>
           </item>
          </layout>
         </item>
         <item>
          <widget class="QWidget" name="widgetCoinControl" native="true">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
           </property>
           <property name="minimumSize">
            <size>
             <width>0</width>
             <height>0</height>
            </size>
           </property>
           <property name="styleSheet">
            <string notr="true"/>
           </property>
           <layout class="QHBoxLayout" name="horizontalLayoutCoinControl5">
            <property name="leftMargin">
             <number>0</number>
            </property>
            <property name="topMargin">
             <number>0</number>
            </property>
            <property name="rightMargin">
             <number>0</number>
            </property>
            <property name="bottomMargin">
             <number>0</number>
            </property>
            <item>
             <layout class="QHBoxLayout" name="horizontalLayoutCoinControl3" stretch="0,0,0,1">
              <property name="spacing">
               <number>20</number>
              </property>
              <property name="topMargin">
               <number>0</number>
              </property>
              <property name="bottomMargin">
               <number>10</number>
              </property>
              <item>
               <layout class="QFormLayout" name="formLayoutCoinControl1">
                <property name="horizontalSpacing">
                 <number>10</number>
                </property>
                <property name="verticalSpacing">
                 <number>14</number>
                </property>
                <property name="leftMargin">
                 <number>10</number>
                </property>
                <property name="topMargin">
                 <number>4</number>
                </property>
                <property name="rightMargin">
                 <number>6</number>
                </property>
                <item row="0" column="0">
                 <widget class="QLabel" name="labelCoinControlQuantityText">
                  <property name="font">
                   <font>
                    <weight>75</weight>
                    <bold>true</bold>
                   </font>
                  </property>
                  <property name="text">
                   <string>Quantity:</string>
                  </property>
                  <property name="margin">
                   <number>0</number>
                  </property>
                 </widget>
                </item>
                <item row="0" column="1">
                 <widget class="QLabel" name="labelCoinControlQuantity">
                  <property name="cursor">
                   <cursorShape>IBeamCursor</cursorShape>
                  </property>
                  <property name="contextMenuPolicy">
                   <enum>Qt::ActionsContextMenu</enum>
                  </property>
                  <property name="text">
                   <string notr="true">0</string>
                  </property>
                  <property name="margin">
                   <number>0</number>
                  </property>
                  <property name="textInteractionFlags">
                   <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
                  </property>
                 </widget>
                </item>
                <item row="1" column="0">
                 <widget class="QLabel" name="labelCoinControlBytesText">
                  <property name="font">
                   <font>
                    <weight>75</weight>
                    <bold>true</bold>
                   </font>
                  </property>
                  <property name="text">
                   <string>Bytes:</string>
                  </property>
                 </widget>
                </item>
                <item row="1" column="1">
                 <widget class="QLabel" name="labelCoinControlBytes">
                  <property name="cursor">
                   <cursorShape>IBeamCursor</cursorShape>
                  </property>
                  <property name="contextMenuPolicy">
                   <enum>Qt::ActionsContextMenu</enum>
                  </property>
                  <property name="text">
                   <string notr="true">0</string>
                  </property>
                  <property name="textInteractionFlags">
                   <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
                  </property>
                 </widget>
                </item>
               </layout>
              </item>
              <item>
               <layout class="QFormLayout" name="formLayoutCoinControl2">
                <property name="horizontalSpacing">
                 <number>10</number>
                </property>
                <property name="verticalSpacing">
                 <number>14</number>
                </property>
                <property name="leftMargin">
                 <number>6</number>
                </property>
                <property name="topMargin">
                 <number>4</number>
                </property>
                <property name="rightMargin">
                 <number>6</number>
                </property>
                <item row="0" column="0">
                 <widget class="QLabel" name="labelCoinControlAmountText">
                  <property name="font">
                   <font>
                    <weight>75</weight>
                    <bold>true</bold>
                   </font>
                  </property>
                  <property name="text">
                   <string>Amount:</string>
                  </property>
                  <property name="margin">
                   <number>0</number>
                  </property>
                 </widget>
                </item>
                <item row="0" column="1">
                 <widget class="QLabel" name="labelCoinControlAmount">
                  <property name="cursor">
                   <cursorShape>IBeamCursor</cursorShape>
                  </property>
                  <property name="contextMenuPolicy">
                   <enum>Qt::ActionsContextMenu</enum>
                  </property>
                  <property name="text">
                   <string notr="true">0.00 BCH</string>
                  </property>
                  <property name="textInteractionFlags">
                   <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
                  </property>
                 </widget>
                </item>
                <item row="1" column="0">
                 <widget class="QLabel" name="labelCoinControlLowOutputText">
                  <property name="font">
                   <font>
                    <weight>75</weight>
                    <bold>true</bold>
                   </font>
                  </property>
                  <property name="text">
                   <string>Dust:</string>
                  </property>
                 </widget>
                </item>
                <item row="1" column="1">
                 <widget class="QLabel" name="labelCoinControlLowOutput">
                  <property name="cursor">
                   <cursorShape>IBeamCursor</cursorShape>
                  </property>
                  <property name="contextMenuPolicy">
                   <enum>Qt::ActionsContextMenu</enum>
                  </property>
                  <property name="text">
                   <string notr="true">no</string>
                  </property>
                  <property name="textInteractionFlags">
                   <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
                  </property>
                 </widget>
                </item>
               </layout>
              </item>
              <item>
               <layout class="QFormLayout" name="formLayoutCoinControl3">
                <property name="horizontalSpacing">
                 <number>10</number>
                </property>
                <property name="verticalSpacing">
                 <number>14</number>
                </property>
                <property name="leftMargin">
                 <number>6</number>
                </property>
                <property name="topMargin">
                 <number>4</number>
                </property>
                <property name="rightMargin">
                 <number>6</number>
                </property>
                <item row="0" column="0">
                 <widget class="QLabel" name="labelCoinControlFeeText">
                  <property name="font">
                   <font>
                    <weight>75</weight>
                    <bold>true</bold>
                   </font>
                  </property>
                  <property name="text">
                   <string>Fee:</string>
                  </property>
                  <property name="margin">
                   <number>0</number>
                  </property>
                 </widget>
                </item>
                <item row="0" column="1">
                 <widget class="QLabel" name="labelCoinControlFee">
                  <property name="cursor">
                   <cursorShape>IBeamCursor</cursorShape>
                  </property>
                  <property name="contextMenuPolicy">
                   <enum>Qt::ActionsContextMenu</enum>
                  </property>
                  <property name="text">
                   <string notr="true">0.00 BCH</string>
                  </property>
                  <property name="textInteractionFlags">
                   <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
                  </property>
                 </widget>
                </item>
               </layout>
              </item>
              <item>
               <layout class="QFormLayout" name="formLayoutCoinControl4">
                <property name="horizontalSpacing">
                 <number>10</number>
                </property>
                <property name="verticalSpacing">
                 <number>14</number>
                </property>
                <property name="leftMargin">
                 <number>6</number>
                </property>
                <property name="topMargin">
                 <number>4</number>
                </property>
                <property name="rightMargin">
                 <number>6</number>
                </property>
                <item row="0" column="0">
                 <widget class="QLabel" name="labelCoinControlAfterFeeText">
                  <property name="font">
                   <font>
                    <weight>75</weight>
                    <bold>true</bold>
                   </font>
                  </property>
                  <property name="text">
                   <string>After Fee:</string>
                  </property>
                  <property name="margin">
                   <number>0</number>
                  </property>
                 </widget>
                </item>
                <item row="0" column="1">
                 <widget class="QLabel" name="labelCoinControlAfterFee">
                  <property name="cursor">
                   <cursorShape>IBeamCursor</cursorShape>
                  </property>
                  <property name="contextMenuPolicy">
                   <enum>Qt::ActionsContextMenu</enum>
                  </property>
                  <property name="text">
                   <string notr="true">0.00 BCH</string>
                  </property>
                  <property name="textInteractionFlags">
                   <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
                  </property>
                 </widget>
                </item>
                <item row="1" column="0">
                 <widget class="QLabel" name="labelCoinControlChangeText">
                  <property name="font">
                   <font>
                    <weight>75</weight>
                    <bold>true</bold>
                   </font>
                  </property>
                  <property name="text">
                   <string>Change:</string>
                  </property>
                 </widget>
                </item>
                <item row="1" column="1">
                 <widget class="QLabel" name="labelCoinControlChange">
                  <property name="cursor">
                   <cursorShape>IBeamCursor</cursorShape>
                  </property>
                  <property name="contextMenuPolicy">
                   <enum>Qt::ActionsContextMenu</enum>
                  </property>
                  <property name="text">
                   <string notr="true">0.00 BCH</string>
                  </property>
                  <property name="textInteractionFlags">
                   <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
                  </property>
                 </widget>
                </item>
               </layout>
              </item>
             </layout>
            </item>
           </layout>
          </widget>
         </item>
         <item>
          <layout class="QHBoxLayout" name="horizontalLayoutCoinControl4" stretch="0,0,0">
           <property name="spacing">
            <number>12</number>
           </property>
           <property name="sizeConstraint">
            <enum>QLayout::SetDefaultConstraint</enum>
           </property>
           <property name="topMargin">
            <number>5</number>
           </property>
           <property name="rightMargin">
            <number>5</number>
           </property>
           <item>
            <widget class="QCheckBox" name="checkBoxCoinControlChange">
             <property name="toolTip">
              <string>If this is activated, but the change address is empty or invalid, change will be sent to a newly generated address.</string>
             </property>
             <property name="text">
              <string>Custom change address</string>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QValidatedLineEdit" name="lineEditCoinControlChange">
             <property name="enabled">
              <bool>false</bool>
             </property>
             <property name="sizePolicy">
              <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
              </sizepolicy>
             </property>
            </widget>
           </item>
           <item>
            <widget class="QLabel" name="labelCoinControlChangeLabel">
             <property name="sizePolicy">
              <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
              </sizepolicy>
             </property>
             <property name="minimumSize">
              <size>
               <width>0</width>
               <height>0</height>
              </size>
             </property>
             <property name="text">
              <string/>
             </property>
             <property name="margin">
              <number>3</number>
             </property>
            </widget>
           </item>
          </layout>
         </item>
         <item>
          <spacer name="verticalSpacerCoinControl">
           <property name="orientation">
            <enum>Qt::Vertical</enum>
           </property>
           <property name="sizeHint" stdset="0">
            <size>
             <width>800</width>
             <height>1</height>
            </size>
           </property>
          </spacer>
         </item>
        </layout>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <widget class="QScrollArea" name="scrollArea">
      <property name="widgetResizable">
       <bool>true</bool>
      </property>
      <widget class="QWidget" name="scrollAreaWidgetContents">
       <property name="geometry">
        <rect>
         <x>0</x>
         <y>0</y>
         <width>830</width>
         <height>104</height>
        </rect>
       </property>
       <layout class="QVBoxLayout" name="verticalLayout_2" stretch="0,1">
        <property name="leftMargin">
         <number>0</number>
        </property>
        <property name="topMargin">
         <number>0</number>
        </property>
        <property name="rightMargin">
         <number>0</number>
        </property>
        <property name="bottomMargin">
         <number>0</number>
        </property>
        <item>
         <layout class="QVBoxLayout" name="entries">
          <property name="spacing">
           <number>6</number>
          </property>
         </layout>
        </item>
        <item>
         <spacer name="verticalSpacer">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
          </property>
          <property name="sizeHint" stdset="0">
           <size>
            <width>20</width>
            <height>40</height>
           </size>
          </property>
         </spacer>
        </item>
       </layout>
      </widget>
     </widget>
    </item>
    <item>
     <widget class="QFrame" name="frameFee">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="maximumSize">
       <size>
        <width>16777215</width>
        <height>16777215</height>
       </size>
      </property>
      <property name="frameShape">
       <enum>QFrame::StyledPanel</enum>
      </property>
      <property name="frameShadow">
       <enum>QFrame::Sunken</enum>
      </property>
      <layout class="QVBoxLayout" name="verticalLayoutFee1">
       <property name="spacing">
        <number>0</number>
       </property>
       <property name="leftMargin">
        <number>0</number>
       </property>
       <property name="topMargin">
        <number>0</number>
       </property>
       <property name="rightMargin">
        <number>0</number>
       </property>
       <property name="bottomMargin">
        <number>0</number>
       </property>
       <item>
        <layout class="QVBoxLayout" name="verticalLayoutFee2" stretch="0,0,0">
         <property name="spacing">
          <number>0</number>
         </property>
         <property name="leftMargin">
          <number>10</number>
         </property>
         <property name="topMargin">
          <number>0</number>
         </property>
         <item>
          <layout class="QHBoxLayout" name="horizontalLayoutFee1">
           <property name="bottomMargin">
            <number>0</number>
           </property>
           <item>
            <layout class="QVBoxLayout" name="verticalLayoutFee7">
             <property name="spacing">
              <number>0</number>
             </property>
             <item>
              <spacer name="verticalSpacerSmartFee">
               <property name="orientation">
                <enum>Qt::Vertical</enum>
               </property>
               <property name="sizeType">
                <enum>QSizePolicy::Fixed</enum>
               </property>
               <property name="sizeHint" stdset="0">
                <size>
                 <width>1</width>
                 <height>4</height>
                </size>
               </property>
              </spacer>
             </item>
             <item>
              <layout class="QHBoxLayout" name="horizontalLayoutSmartFee">
               <property name="spacing">
                <number>10</number>
               </property>
               <item>
                <widget class="QLabel" name="labelFeeHeadline">
                 <property name="sizePolicy">
                  <sizepolicy hsizetype="Preferred" vsizetype="Maximum">
                   <horstretch>0</horstretch>
                   <verstretch>0</verstretch>
                  </sizepolicy>
                 </property>
                 <property name="font">
                  <font>
                   <weight>75</weight>
                   <bold>true</bold>
                  </font>
                 </property>
                 <property name="styleSheet">
                  <string notr="true">font-weight:bold;</string>
                 </property>
                 <property name="text">
                  <string>Transaction Fee:</string>
                 </property>
                </widget>
               </item>
               <item>
                <widget class="QLabel" name="labelFeeMinimized">
                 <property name="text">
                  <string/>
                 </property>
                </widget>
               </item>
               <item>
                <widget class="QPushButton" name="buttonChooseFee">
                 <property name="text">
                  <string>Choose...</string>
                 </property>
                </widget>
               </item>
              </layout>
             </item>
             <item>
              <spacer name="verticalSpacer_5">
               <property name="orientation">
                <enum>Qt::Vertical</enum>
               </property>
               <property name="sizeHint" stdset="0">
                <size>
                 <width>1</width>
                 <height>1</height>
                </size>
               </property>
              </spacer>
             </item>
            </layout>
           </item>
           <item>
            <spacer name="horizontalSpacer_4">
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>40</width>
               <height>20</height>
              </size>
             </property>
            </spacer>
           </item>
           <item>
            <widget class="QPushButton" name="buttonMinimizeFee">
             <property name="toolTip">
              <string>collapse fee-settings</string>
             </property>
             <property name="text">
              <string>Hide</string>
             </property>
            </widget>
           </item>
          </layout>
         </item>
         <item>
          <widget class="QFrame" name="frameFeeSelection">
           <layout class="QVBoxLayout" name="verticalLayoutFee12">
            <property name="spacing">
             <number>0</number>
            </property>
            <property name="leftMargin">
             <number>0</number>
            </property>
            <property name="topMargin">
             <number>0</number>
            </property>
            <property name="rightMargin">
             <number>0</number>
            </property>
            <property name="bottomMargin">
             <number>0</number>
            </property>
            <item>
             <layout class="QGridLayout" name="gridLayoutFee">
              <property name="topMargin">
               <number>10</number>
              </property>
              <property name="bottomMargin">
               <number>4</number>
              </property>
              <property name="horizontalSpacing">
               <number>10</number>
              </property>
              <property name="verticalSpacing">
               <number>4</number>
              </property>
              <item row="1" column="1">
               <layout class="QVBoxLayout" name="verticalLayoutFee8">
                <property name="spacing">
                 <number>6</number>
                </property>
                <item>
                 <layout class="QHBoxLayout" name="horizontalLayoutFee13">
                  <item>
                   <widget class="QLabel" name="labelCustomPerKilobyte">
                    <property name="toolTip">
                     <string>Specify a custom fee per kB (1,000 bytes) of the transaction's size.
 
 Note:  Since the fee is calculated on a per-byte basis, a fee of "100 satoshis per kB" for a transaction size of 500 bytes (half of 1 kB) would ultimately yield a fee of only 50 satoshis.</string>
                    </property>
                    <property name="text">
                     <string>per kilobyte</string>
                    </property>
                   </widget>
                  </item>
                  <item>
                   <widget class="BitcoinAmountField" name="customFee"/>
                  </item>
                  <item>
                   <spacer name="horizontalSpacer_6">
                    <property name="orientation">
                     <enum>Qt::Horizontal</enum>
                    </property>
                    <property name="sizeHint" stdset="0">
                     <size>
                      <width>1</width>
                      <height>1</height>
                     </size>
                    </property>
                   </spacer>
                  </item>
                 </layout>
                </item>
                <item>
                 <layout class="QHBoxLayout" name="horizontalLayoutFee8">
                  <item>
-                  <widget class="QCheckBox" name="checkBoxMinimumFee">
-                   <property name="toolTip">
-                    <string>Paying only the minimum fee is just fine as long as there is less transaction volume than space in the blocks. But be aware that this can end up in a never confirming transaction once there is more demand for bitcoin transactions than the network can process.</string>
-                   </property>
-                   <property name="text">
-                    <string/>
-                   </property>
-                  </widget>
-                 </item>
-                 <item>
-                  <widget class="QLabel" name="labelMinFeeWarning">
+                  <widget class="QLabel" name="labelCustomFeeWarning">
                    <property name="enabled">
                     <bool>true</bool>
                    </property>
                    <property name="toolTip">
-                    <string>Paying only the minimum fee is just fine as long as there is less transaction volume than space in the blocks. But be aware that this can end up in a never confirming transaction once there is more demand for bitcoin transactions than the network can process.</string>
+                    <string>When there is less transaction volume than space in the blocks, miners as well as relaying nodes may enforce a minimum fee. Paying only this minimum fee is just fine, but be aware that this can result in a never confirming transaction once there is more demand for bitcoin transactions than the network can process.</string>
                    </property>
                    <property name="text">
-                    <string>(read the tooltip)</string>
-                   </property>
-                   <property name="margin">
-                    <number>5</number>
+                    <string>A too low fee might result in a never confirming transaction (read the tooltip)</string>
                    </property>
                   </widget>
                  </item>
                  <item>
                   <spacer name="horizontalSpacer_2">
                    <property name="orientation">
                     <enum>Qt::Horizontal</enum>
                    </property>
                    <property name="sizeHint" stdset="0">
                     <size>
                      <width>1</width>
                      <height>1</height>
                     </size>
                    </property>
                   </spacer>
                  </item>
                 </layout>
                </item>
               </layout>
              </item>
              <item row="0" column="0">
               <layout class="QVBoxLayout" name="verticalLayoutFee4" stretch="0,1">
                <item>
                 <widget class="QRadioButton" name="radioSmartFee">
                  <property name="text">
                   <string>Recommended:</string>
                  </property>
                  <property name="checked">
                   <bool>true</bool>
                  </property>
                  <attribute name="buttonGroup">
                   <string notr="true">groupFee</string>
                  </attribute>
                 </widget>
                </item>
                <item>
                 <spacer name="verticalSpacer_2">
                  <property name="orientation">
                   <enum>Qt::Vertical</enum>
                  </property>
                  <property name="sizeHint" stdset="0">
                   <size>
                    <width>1</width>
                    <height>1</height>
                   </size>
                  </property>
                 </spacer>
                </item>
               </layout>
              </item>
              <item row="1" column="0">
               <layout class="QVBoxLayout" name="verticalLayoutFee9" stretch="0,1">
                <item>
                 <widget class="QRadioButton" name="radioCustomFee">
                  <property name="text">
                   <string>Custom:</string>
                  </property>
                  <attribute name="buttonGroup">
                   <string notr="true">groupFee</string>
                  </attribute>
                 </widget>
                </item>
                <item>
                 <spacer name="verticalSpacer_6">
                  <property name="orientation">
                   <enum>Qt::Vertical</enum>
                  </property>
                  <property name="sizeHint" stdset="0">
                   <size>
                    <width>1</width>
                    <height>1</height>
                   </size>
                  </property>
                 </spacer>
                </item>
               </layout>
              </item>
              <item row="0" column="1">
               <layout class="QVBoxLayout" name="verticalLayoutFee3" stretch="0,0,1">
                <property name="spacing">
                 <number>6</number>
                </property>
                <property name="topMargin">
                 <number>2</number>
                </property>
                <item>
                 <layout class="QHBoxLayout" name="horizontalLayoutFee12">
                  <item>
                   <widget class="QLabel" name="labelSmartFee">
                    <property name="text">
                     <string/>
                    </property>
-                   <property name="margin">
-                    <number>2</number>
-                   </property>
                   </widget>
                  </item>
                  <item>
                   <widget class="QLabel" name="labelFeeEstimation">
                    <property name="text">
                     <string/>
                    </property>
                   </widget>
                  </item>
                  <item>
                   <widget class="QLabel" name="labelSmartFee2">
                    <property name="text">
                     <string>(Smart fee not initialized yet. This usually takes a few blocks...)</string>
                    </property>
-                   <property name="margin">
-                    <number>2</number>
-                   </property>
                   </widget>
                  </item>
                  <item>
                   <spacer name="horizontalSpacer_5">
                    <property name="orientation">
                     <enum>Qt::Horizontal</enum>
                    </property>
                    <property name="sizeHint" stdset="0">
                     <size>
                      <width>1</width>
                      <height>1</height>
                     </size>
                    </property>
                   </spacer>
                  </item>
                 </layout>
                </item>
                <item>
                 <spacer name="verticalSpacer_4">
                  <property name="orientation">
                   <enum>Qt::Vertical</enum>
                  </property>
                  <property name="sizeHint" stdset="0">
                   <size>
                    <width>1</width>
                    <height>1</height>
                   </size>
                  </property>
                 </spacer>
                </item>
               </layout>
              </item>
             </layout>
            </item>
           </layout>
          </widget>
         </item>
         <item>
          <spacer name="verticalSpacerFee">
           <property name="orientation">
            <enum>Qt::Vertical</enum>
           </property>
           <property name="sizeHint" stdset="0">
            <size>
             <width>800</width>
             <height>1</height>
            </size>
           </property>
          </spacer>
         </item>
        </layout>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <widget class="QPushButton" name="sendButton">
        <property name="minimumSize">
         <size>
          <width>150</width>
          <height>0</height>
         </size>
        </property>
        <property name="toolTip">
         <string>Confirm the send action</string>
        </property>
        <property name="text">
         <string>S&amp;end</string>
        </property>
        <property name="icon">
         <iconset resource="../bitcoin.qrc">
          <normaloff>:/icons/send</normaloff>:/icons/send</iconset>
        </property>
        <property name="autoDefault">
         <bool>false</bool>
        </property>
        <property name="default">
         <bool>false</bool>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="clearButton">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
          <horstretch>0</horstretch>
          <verstretch>0</verstretch>
         </sizepolicy>
        </property>
        <property name="toolTip">
         <string>Clear all fields of the form.</string>
        </property>
        <property name="text">
         <string>Clear &amp;All</string>
        </property>
        <property name="icon">
         <iconset resource="../bitcoin.qrc">
          <normaloff>:/icons/remove</normaloff>:/icons/remove</iconset>
        </property>
        <property name="autoDefault">
         <bool>false</bool>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="addButton">
        <property name="toolTip">
         <string>Send to multiple recipients at once</string>
        </property>
        <property name="text">
         <string>Add &amp;Recipient</string>
        </property>
        <property name="icon">
         <iconset resource="../bitcoin.qrc">
          <normaloff>:/icons/add</normaloff>:/icons/add</iconset>
        </property>
        <property name="autoDefault">
         <bool>false</bool>
        </property>
       </widget>
      </item>
      <item>
       <spacer name="horizontalSpacer">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
        <property name="sizeHint" stdset="0">
         <size>
          <width>40</width>
          <height>20</height>
         </size>
        </property>
       </spacer>
      </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_2">
        <property name="spacing">
         <number>3</number>
        </property>
        <item>
         <widget class="QLabel" name="labelBalanceName">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="text">
           <string>Balance:</string>
          </property>
         </widget>
        </item>
        <item>
         <widget class="QLabel" name="labelBalance">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="cursor">
           <cursorShape>IBeamCursor</cursorShape>
          </property>
          <property name="text">
           <string notr="true">123.456 BCH</string>
          </property>
          <property name="textInteractionFlags">
           <set>Qt::LinksAccessibleByMouse|Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
          </property>
         </widget>
        </item>
       </layout>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <customwidgets>
   <customwidget>
    <class>QValidatedLineEdit</class>
    <extends>QLineEdit</extends>
    <header>qt/qvalidatedlineedit.h</header>
   </customwidget>
   <customwidget>
    <class>BitcoinAmountField</class>
    <extends>QLineEdit</extends>
    <header>qt/bitcoinamountfield.h</header>
    <container>1</container>
   </customwidget>
  </customwidgets>
  <resources>
   <include location="../bitcoin.qrc"/>
  </resources>
  <connections/>
  <buttongroups>
   <buttongroup name="groupFee"/>
  </buttongroups>
 </ui>
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 05bac670f..edddbdc05 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -1,1069 +1,1041 @@
 // Copyright (c) 2011-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #if defined(HAVE_CONFIG_H)
 #include <config/bitcoin-config.h>
 #endif
 
 #include <qt/forms/ui_sendcoinsdialog.h>
 #include <qt/sendcoinsdialog.h>
 
 #include <chainparams.h>
 #include <interfaces/node.h>
 #include <key_io.h>
 #include <qt/addresstablemodel.h>
 #include <qt/bitcoinunits.h>
 #include <qt/clientmodel.h>
 #include <qt/coincontroldialog.h>
 #include <qt/guiutil.h>
 #include <qt/optionsmodel.h>
 #include <qt/platformstyle.h>
 #include <qt/sendcoinsentry.h>
 #include <txmempool.h>
 #include <ui_interface.h>
 #include <wallet/coincontrol.h>
 #include <wallet/fees.h>
 #include <wallet/wallet.h>
 
 #include <QScrollBar>
 #include <QSettings>
 #include <QTextDocument>
 
 SendCoinsDialog::SendCoinsDialog(const PlatformStyle *_platformStyle,
                                  WalletModel *_model, QWidget *parent)
     : QDialog(parent), ui(new Ui::SendCoinsDialog), clientModel(nullptr),
       model(_model), fNewRecipientAllowed(true), fFeeMinimized(true),
       platformStyle(_platformStyle) {
     ui->setupUi(this);
 
     if (!_platformStyle->getImagesOnButtons()) {
         ui->addButton->setIcon(QIcon());
         ui->clearButton->setIcon(QIcon());
         ui->sendButton->setIcon(QIcon());
     } else {
         ui->addButton->setIcon(_platformStyle->SingleColorIcon(":/icons/add"));
         ui->clearButton->setIcon(
             _platformStyle->SingleColorIcon(":/icons/remove"));
         ui->sendButton->setIcon(
             _platformStyle->SingleColorIcon(":/icons/send"));
     }
 
     GUIUtil::setupAddressWidget(ui->lineEditCoinControlChange, this);
 
     addEntry();
 
     connect(ui->addButton, &QPushButton::clicked, this,
             &SendCoinsDialog::addEntry);
     connect(ui->clearButton, &QPushButton::clicked, this,
             &SendCoinsDialog::clear);
 
     // Coin Control
     connect(ui->pushButtonCoinControl, &QPushButton::clicked, this,
             &SendCoinsDialog::coinControlButtonClicked);
     connect(ui->checkBoxCoinControlChange, &QCheckBox::stateChanged, this,
             &SendCoinsDialog::coinControlChangeChecked);
     connect(ui->lineEditCoinControlChange, &QValidatedLineEdit::textEdited,
             this, &SendCoinsDialog::coinControlChangeEdited);
 
     // Coin Control: clipboard actions
     QAction *clipboardQuantityAction = new QAction(tr("Copy quantity"), this);
     QAction *clipboardAmountAction = new QAction(tr("Copy amount"), this);
     QAction *clipboardFeeAction = new QAction(tr("Copy fee"), this);
     QAction *clipboardAfterFeeAction = new QAction(tr("Copy after fee"), this);
     QAction *clipboardBytesAction = new QAction(tr("Copy bytes"), this);
     QAction *clipboardLowOutputAction = new QAction(tr("Copy dust"), this);
     QAction *clipboardChangeAction = new QAction(tr("Copy change"), this);
     connect(clipboardQuantityAction, &QAction::triggered, this,
             &SendCoinsDialog::coinControlClipboardQuantity);
     connect(clipboardAmountAction, &QAction::triggered, this,
             &SendCoinsDialog::coinControlClipboardAmount);
     connect(clipboardFeeAction, &QAction::triggered, this,
             &SendCoinsDialog::coinControlClipboardFee);
     connect(clipboardAfterFeeAction, &QAction::triggered, this,
             &SendCoinsDialog::coinControlClipboardAfterFee);
     connect(clipboardBytesAction, &QAction::triggered, this,
             &SendCoinsDialog::coinControlClipboardBytes);
     connect(clipboardLowOutputAction, &QAction::triggered, this,
             &SendCoinsDialog::coinControlClipboardLowOutput);
     connect(clipboardChangeAction, &QAction::triggered, this,
             &SendCoinsDialog::coinControlClipboardChange);
     ui->labelCoinControlQuantity->addAction(clipboardQuantityAction);
     ui->labelCoinControlAmount->addAction(clipboardAmountAction);
     ui->labelCoinControlFee->addAction(clipboardFeeAction);
     ui->labelCoinControlAfterFee->addAction(clipboardAfterFeeAction);
     ui->labelCoinControlBytes->addAction(clipboardBytesAction);
     ui->labelCoinControlLowOutput->addAction(clipboardLowOutputAction);
     ui->labelCoinControlChange->addAction(clipboardChangeAction);
 
     // init transaction fee section
     QSettings settings;
     if (!settings.contains("fFeeSectionMinimized")) {
         settings.setValue("fFeeSectionMinimized", true);
     }
     // compatibility
     if (!settings.contains("nFeeRadio") &&
         settings.contains("nTransactionFee") &&
         settings.value("nTransactionFee").toLongLong() > 0) {
         // custom
         settings.setValue("nFeeRadio", 1);
     }
     if (!settings.contains("nFeeRadio")) {
         // recommended
         settings.setValue("nFeeRadio", 0);
     }
     if (!settings.contains("nTransactionFee")) {
         settings.setValue("nTransactionFee",
                           qint64(DEFAULT_PAY_TX_FEE / SATOSHI));
     }
-    if (!settings.contains("fPayOnlyMinFee")) {
-        settings.setValue("fPayOnlyMinFee", false);
-    }
     ui->groupFee->setId(ui->radioSmartFee, 0);
     ui->groupFee->setId(ui->radioCustomFee, 1);
     ui->groupFee
         ->button(
             std::max<int>(0, std::min(1, settings.value("nFeeRadio").toInt())))
         ->setChecked(true);
+    ui->customFee->SetAllowEmpty(false);
     ui->customFee->setValue(
         int64_t(settings.value("nTransactionFee").toLongLong()) * SATOSHI);
-    ui->checkBoxMinimumFee->setChecked(
-        settings.value("fPayOnlyMinFee").toBool());
     minimizeFeeSection(settings.value("fFeeSectionMinimized").toBool());
 
     // Set the model properly.
     setModel(model);
 }
 
 void SendCoinsDialog::setClientModel(ClientModel *_clientModel) {
     this->clientModel = _clientModel;
 
     if (_clientModel) {
         connect(_clientModel, &ClientModel::numBlocksChanged, this,
                 &SendCoinsDialog::updateSmartFeeLabel);
     }
 }
 
 void SendCoinsDialog::setModel(WalletModel *_model) {
     this->model = _model;
 
     if (_model && _model->getOptionsModel()) {
         for (int i = 0; i < ui->entries->count(); ++i) {
             SendCoinsEntry *entry = qobject_cast<SendCoinsEntry *>(
                 ui->entries->itemAt(i)->widget());
             if (entry) {
                 entry->setModel(_model);
             }
         }
 
         interfaces::WalletBalances balances = _model->wallet().getBalances();
         setBalance(balances);
         connect(_model, &WalletModel::balanceChanged, this,
                 &SendCoinsDialog::setBalance);
         connect(_model->getOptionsModel(), &OptionsModel::displayUnitChanged,
                 this, &SendCoinsDialog::updateDisplayUnit);
         updateDisplayUnit();
 
         // Coin Control
         connect(_model->getOptionsModel(), &OptionsModel::displayUnitChanged,
                 this, &SendCoinsDialog::coinControlUpdateLabels);
         connect(_model->getOptionsModel(),
                 &OptionsModel::coinControlFeaturesChanged, this,
                 &SendCoinsDialog::coinControlFeatureChanged);
         ui->frameCoinControl->setVisible(
             _model->getOptionsModel()->getCoinControlFeatures());
         coinControlUpdateLabels();
 
         // fee section
 #if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0))
         const auto buttonClickedEvent =
             QOverload<int>::of(&QButtonGroup::idClicked);
 #else
         /* QOverload in introduced from Qt 5.7, but we support down to 5.5.1 */
         const auto buttonClickedEvent =
             static_cast<void (QButtonGroup::*)(int)>(
                 &QButtonGroup::buttonClicked);
 #endif
         connect(ui->groupFee, buttonClickedEvent, this,
                 &SendCoinsDialog::updateFeeSectionControls);
         connect(ui->groupFee, buttonClickedEvent, this,
                 &SendCoinsDialog::coinControlUpdateLabels);
         connect(ui->customFee, &BitcoinAmountField::valueChanged, this,
                 &SendCoinsDialog::coinControlUpdateLabels);
-        connect(ui->checkBoxMinimumFee, &QCheckBox::stateChanged, this,
-                &SendCoinsDialog::setMinimumFee);
-        connect(ui->checkBoxMinimumFee, &QCheckBox::stateChanged, this,
-                &SendCoinsDialog::updateFeeSectionControls);
-        connect(ui->checkBoxMinimumFee, &QCheckBox::stateChanged, this,
-                &SendCoinsDialog::coinControlUpdateLabels);
-
-        ui->customFee->setSingleStep(model->wallet().getRequiredFee(1000));
+        Amount requiredFee = model->wallet().getRequiredFee(1000);
+        ui->customFee->SetMinValue(requiredFee);
+        if (ui->customFee->value() < requiredFee) {
+            ui->customFee->setValue(requiredFee);
+        }
+        ui->customFee->setSingleStep(requiredFee);
         updateFeeSectionControls();
-        updateMinFeeLabel();
         updateSmartFeeLabel();
 
         if (model->wallet().privateKeysDisabled()) {
             ui->sendButton->setText(tr("Cr&eate Unsigned"));
             ui->sendButton->setToolTip(
                 tr("Creates a Partially Signed Bitcoin Transaction (PSBT) for "
                    "use with e.g. an offline %1 wallet, or a PSBT-compatible "
                    "hardware wallet.")
                     .arg(PACKAGE_NAME));
         }
     }
 }
 
 SendCoinsDialog::~SendCoinsDialog() {
     QSettings settings;
     settings.setValue("fFeeSectionMinimized", fFeeMinimized);
     settings.setValue("nFeeRadio", ui->groupFee->checkedId());
     settings.setValue("nTransactionFee",
                       qint64(ui->customFee->value() / SATOSHI));
-    settings.setValue("fPayOnlyMinFee", ui->checkBoxMinimumFee->isChecked());
 
     delete ui;
 }
 
 bool SendCoinsDialog::PrepareSendText(QString &question_string,
                                       QString &informative_text,
                                       QString &detailed_text) {
     QList<SendCoinsRecipient> recipients;
     bool valid = true;
 
     for (int i = 0; i < ui->entries->count(); ++i) {
         SendCoinsEntry *entry =
             qobject_cast<SendCoinsEntry *>(ui->entries->itemAt(i)->widget());
         if (entry) {
             if (entry->validate(model->node())) {
                 recipients.append(entry->getValue());
             } else if (valid) {
                 ui->scrollArea->ensureWidgetVisible(entry);
                 valid = false;
             }
         }
     }
 
     if (!valid || recipients.isEmpty()) {
         return false;
     }
 
     fNewRecipientAllowed = false;
     WalletModel::UnlockContext ctx(model->requestUnlock());
     if (!ctx.isValid()) {
         // Unlock wallet was cancelled
         fNewRecipientAllowed = true;
         return false;
     }
 
     // prepare transaction for getting txFee earlier
     m_current_transaction =
         std::make_unique<WalletModelTransaction>(recipients);
     WalletModel::SendCoinsReturn prepareStatus;
 
     // Always use a CCoinControl instance, use the CoinControlDialog instance if
     // CoinControl has been enabled
     CCoinControl ctrl;
     if (model->getOptionsModel()->getCoinControlFeatures()) {
         ctrl = *CoinControlDialog::coinControl();
     }
 
     updateCoinControlState(ctrl);
 
     prepareStatus = model->prepareTransaction(*m_current_transaction, ctrl);
 
     // process prepareStatus and on error generate message shown to user
     processSendCoinsReturn(prepareStatus,
                            BitcoinUnits::formatWithUnit(
                                model->getOptionsModel()->getDisplayUnit(),
                                m_current_transaction->getTransactionFee()));
 
     if (prepareStatus.status != WalletModel::OK) {
         fNewRecipientAllowed = true;
         return false;
     }
 
     Amount txFee = m_current_transaction->getTransactionFee();
     QStringList formatted;
     for (const SendCoinsRecipient &rcp :
          m_current_transaction->getRecipients()) {
         // generate amount string with wallet name in case of multiwallet
         QString amount = BitcoinUnits::formatWithUnit(
             model->getOptionsModel()->getDisplayUnit(), rcp.amount);
         if (model->isMultiwallet()) {
             amount.append(
                 tr(" from wallet '%1'")
                     .arg(GUIUtil::HtmlEscape(model->getWalletName())));
         }
         // generate address string
         QString address = rcp.address;
 
         QString recipientElement;
 
 #ifdef ENABLE_BIP70
         // normal payment
         if (!rcp.paymentRequest.IsInitialized())
 #endif
         {
             if (rcp.label.length() > 0) {
                 // label with address
                 recipientElement.append(
                     tr("%1 to '%2'")
                         .arg(amount, GUIUtil::HtmlEscape(rcp.label)));
                 recipientElement.append(QString(" (%1)").arg(address));
             } else {
                 // just address
                 recipientElement.append(tr("%1 to %2").arg(amount, address));
             }
         }
 #ifdef ENABLE_BIP70
         // authenticated payment request
         else if (!rcp.authenticatedMerchant.isEmpty()) {
             recipientElement.append(
                 tr("%1 to '%2'").arg(amount, rcp.authenticatedMerchant));
         } else {
             // unauthenticated payment request
             recipientElement.append(tr("%1 to %2").arg(amount, address));
         }
 #endif
 
         formatted.append(recipientElement);
     }
 
     if (model->wallet().privateKeysDisabled()) {
         question_string.append(tr("Do you want to draft this transaction?"));
     } else {
         question_string.append(tr("Are you sure you want to send?"));
     }
 
     question_string.append("<br /><span style='font-size:10pt;'>");
     if (model->wallet().privateKeysDisabled()) {
         question_string.append(
             tr("Please, review your transaction proposal. This will produce a "
                "Partially Signed Bitcoin Transaction (PSBT) which you can save "
                "or copy and then sign with e.g. an offline %1 wallet, or a "
                "PSBT-compatible hardware wallet.")
                 .arg(PACKAGE_NAME));
     } else {
         question_string.append(tr("Please, review your transaction."));
     }
     question_string.append("</span>%1");
 
     if (txFee > Amount::zero()) {
         // append fee string if a fee is required
         question_string.append("<hr /><b>");
         question_string.append(tr("Transaction fee"));
         question_string.append("</b>");
 
         // append transaction size
         question_string.append(
             " (" +
             QString::number(
                 (double)m_current_transaction->getTransactionSize() / 1000) +
             " kB): ");
 
         // append transaction fee value
         question_string.append(
             "<span style='color:#aa0000; font-weight:bold;'>");
         question_string.append(BitcoinUnits::formatHtmlWithUnit(
             model->getOptionsModel()->getDisplayUnit(), txFee));
         question_string.append("</span><br />");
     }
 
     // add total amount in all subdivision units
     question_string.append("<hr />");
     Amount totalAmount =
         m_current_transaction->getTotalTransactionAmount() + txFee;
     QStringList alternativeUnits;
     for (const BitcoinUnits::Unit u : BitcoinUnits::availableUnits()) {
         if (u != model->getOptionsModel()->getDisplayUnit()) {
             alternativeUnits.append(
                 BitcoinUnits::formatHtmlWithUnit(u, totalAmount));
         }
     }
     question_string.append(
         QString("<b>%1</b>: <b>%2</b>")
             .arg(tr("Total Amount"))
             .arg(BitcoinUnits::formatHtmlWithUnit(
                 model->getOptionsModel()->getDisplayUnit(), totalAmount)));
     question_string.append(
         QString("<br /><span style='font-size:10pt; "
                 "font-weight:normal;'>(=%1)</span>")
             .arg(alternativeUnits.join(" " + tr("or") + " ")));
 
     if (formatted.size() > 1) {
         question_string = question_string.arg("");
         informative_text =
             tr("To review recipient list click \"Show Details...\"");
         detailed_text = formatted.join("\n\n");
     } else {
         question_string = question_string.arg("<br /><br />" + formatted.at(0));
     }
 
     return true;
 }
 
 void SendCoinsDialog::on_sendButton_clicked() {
     if (!model || !model->getOptionsModel()) {
         return;
     }
 
     QString question_string, informative_text, detailed_text;
     if (!PrepareSendText(question_string, informative_text, detailed_text)) {
         return;
     }
     assert(m_current_transaction);
 
     const QString confirmation = model->wallet().privateKeysDisabled()
                                      ? tr("Confirm transaction proposal")
                                      : tr("Confirm send coins");
     const QString confirmButtonText = model->wallet().privateKeysDisabled()
                                           ? tr("Create Unsigned")
                                           : tr("Send");
     SendConfirmationDialog confirmationDialog(
         confirmation, question_string, informative_text, detailed_text,
         SEND_CONFIRM_DELAY, confirmButtonText, this);
     confirmationDialog.exec();
     QMessageBox::StandardButton retval =
         static_cast<QMessageBox::StandardButton>(confirmationDialog.result());
 
     if (retval != QMessageBox::Yes) {
         fNewRecipientAllowed = true;
         return;
     }
 
     bool send_failure = false;
     if (model->wallet().privateKeysDisabled()) {
         CMutableTransaction mtx =
             CMutableTransaction{*(m_current_transaction->getWtx())};
         PartiallySignedTransaction psbtx(mtx);
         bool complete = false;
         const TransactionError err = model->wallet().fillPSBT(
             SigHashType().withForkId(), false /* sign */,
             true /* bip32derivs */, psbtx, complete);
         assert(!complete);
         assert(err == TransactionError::OK);
         // Serialize the PSBT
         CDataStream ssTx(SER_NETWORK, PROTOCOL_VERSION);
         ssTx << psbtx;
         GUIUtil::setClipboard(EncodeBase64(ssTx.str()).c_str());
         QMessageBox msgBox;
         msgBox.setText("Unsigned Transaction");
         msgBox.setInformativeText(
             "The PSBT has been copied to the clipboard. You can also save it.");
         msgBox.setStandardButtons(QMessageBox::Save | QMessageBox::Discard);
         msgBox.setDefaultButton(QMessageBox::Discard);
         switch (msgBox.exec()) {
             case QMessageBox::Save: {
                 QString selectedFilter;
                 QString fileNameSuggestion = "";
                 bool first = true;
                 for (const SendCoinsRecipient &rcp :
                      m_current_transaction->getRecipients()) {
                     if (!first) {
                         fileNameSuggestion.append(" - ");
                     }
                     QString labelOrAddress =
                         rcp.label.isEmpty() ? rcp.address : rcp.label;
                     QString amount = BitcoinUnits::formatWithUnit(
                         model->getOptionsModel()->getDisplayUnit(), rcp.amount);
                     fileNameSuggestion.append(labelOrAddress + "-" + amount);
                     first = false;
                 }
                 fileNameSuggestion.append(".psbt");
                 QString filename = GUIUtil::getSaveFileName(
                     this, tr("Save Transaction Data"), fileNameSuggestion,
                     tr("Partially Signed Transaction (Binary) (*.psbt)"),
                     &selectedFilter);
                 if (filename.isEmpty()) {
                     return;
                 }
                 std::ofstream out(filename.toLocal8Bit().data());
                 out << ssTx.str();
                 out.close();
                 Q_EMIT message(tr("PSBT saved"), "PSBT saved to disk",
                                CClientUIInterface::MSG_INFORMATION);
                 break;
             }
             case QMessageBox::Discard:
                 break;
             default:
                 assert(false);
         }
     } else {
         // now send the prepared transaction
         WalletModel::SendCoinsReturn sendStatus =
             model->sendCoins(*m_current_transaction);
         // process sendStatus and on error generate message shown to user
         processSendCoinsReturn(sendStatus);
 
         if (sendStatus.status == WalletModel::OK) {
             Q_EMIT coinsSent(m_current_transaction->getWtx()->GetId());
         } else {
             send_failure = true;
         }
     }
     if (!send_failure) {
         accept();
         CoinControlDialog::coinControl()->UnSelectAll();
         coinControlUpdateLabels();
     }
     fNewRecipientAllowed = true;
     m_current_transaction.reset();
 }
 
 void SendCoinsDialog::clear() {
     m_current_transaction.reset();
 
     // Clear coin control settings
     CoinControlDialog::coinControl()->UnSelectAll();
     ui->checkBoxCoinControlChange->setChecked(false);
     ui->lineEditCoinControlChange->clear();
     coinControlUpdateLabels();
 
     // Remove entries until only one left
     while (ui->entries->count()) {
         ui->entries->takeAt(0)->widget()->deleteLater();
     }
     addEntry();
 
     updateTabsAndLabels();
 }
 
 void SendCoinsDialog::reject() {
     clear();
 }
 
 void SendCoinsDialog::accept() {
     clear();
 }
 
 SendCoinsEntry *SendCoinsDialog::addEntry() {
     SendCoinsEntry *entry = new SendCoinsEntry(platformStyle, model, this);
     ui->entries->addWidget(entry);
     connect(entry, &SendCoinsEntry::removeEntry, this,
             &SendCoinsDialog::removeEntry);
     connect(entry, &SendCoinsEntry::useAvailableBalance, this,
             &SendCoinsDialog::useAvailableBalance);
     connect(entry, &SendCoinsEntry::payAmountChanged, this,
             &SendCoinsDialog::coinControlUpdateLabels);
     connect(entry, &SendCoinsEntry::subtractFeeFromAmountChanged, this,
             &SendCoinsDialog::coinControlUpdateLabels);
 
     // Focus the field, so that entry can start immediately
     entry->clear();
     entry->setFocus();
     ui->scrollAreaWidgetContents->resize(
         ui->scrollAreaWidgetContents->sizeHint());
     qApp->processEvents();
     QScrollBar *bar = ui->scrollArea->verticalScrollBar();
     if (bar) {
         bar->setSliderPosition(bar->maximum());
     }
 
     updateTabsAndLabels();
     return entry;
 }
 
 void SendCoinsDialog::updateTabsAndLabels() {
     setupTabChain(nullptr);
     coinControlUpdateLabels();
 }
 
 void SendCoinsDialog::removeEntry(SendCoinsEntry *entry) {
     entry->hide();
 
     // If the last entry is about to be removed add an empty one
     if (ui->entries->count() == 1) {
         addEntry();
     }
 
     entry->deleteLater();
 
     updateTabsAndLabels();
 }
 
 QWidget *SendCoinsDialog::setupTabChain(QWidget *prev) {
     for (int i = 0; i < ui->entries->count(); ++i) {
         SendCoinsEntry *entry =
             qobject_cast<SendCoinsEntry *>(ui->entries->itemAt(i)->widget());
         if (entry) {
             prev = entry->setupTabChain(prev);
         }
     }
     QWidget::setTabOrder(prev, ui->sendButton);
     QWidget::setTabOrder(ui->sendButton, ui->clearButton);
     QWidget::setTabOrder(ui->clearButton, ui->addButton);
     return ui->addButton;
 }
 
 void SendCoinsDialog::setAddress(const QString &address) {
     SendCoinsEntry *entry = nullptr;
     // Replace the first entry if it is still unused
     if (ui->entries->count() == 1) {
         SendCoinsEntry *first =
             qobject_cast<SendCoinsEntry *>(ui->entries->itemAt(0)->widget());
         if (first->isClear()) {
             entry = first;
         }
     }
     if (!entry) {
         entry = addEntry();
     }
 
     entry->setAddress(address);
 }
 
 void SendCoinsDialog::pasteEntry(const SendCoinsRecipient &rv) {
     if (!fNewRecipientAllowed) {
         return;
     }
 
     SendCoinsEntry *entry = nullptr;
     // Replace the first entry if it is still unused
     if (ui->entries->count() == 1) {
         SendCoinsEntry *first =
             qobject_cast<SendCoinsEntry *>(ui->entries->itemAt(0)->widget());
         if (first->isClear()) {
             entry = first;
         }
     }
     if (!entry) {
         entry = addEntry();
     }
 
     entry->setValue(rv);
     updateTabsAndLabels();
 }
 
 bool SendCoinsDialog::handlePaymentRequest(const SendCoinsRecipient &rv) {
     // Just paste the entry, all pre-checks are done in paymentserver.cpp.
     pasteEntry(rv);
     return true;
 }
 
 void SendCoinsDialog::setBalance(const interfaces::WalletBalances &balances) {
     if (model && model->getOptionsModel()) {
         Amount balance = balances.balance;
         if (model->wallet().privateKeysDisabled()) {
             balance = balances.watch_only_balance;
             ui->labelBalanceName->setText(tr("Watch-only balance:"));
         }
         ui->labelBalance->setText(BitcoinUnits::formatWithUnit(
             model->getOptionsModel()->getDisplayUnit(), balance));
     }
 }
 
 void SendCoinsDialog::updateDisplayUnit() {
     setBalance(model->wallet().getBalances());
     ui->customFee->setDisplayUnit(model->getOptionsModel()->getDisplayUnit());
-    updateMinFeeLabel();
     updateSmartFeeLabel();
 }
 
 void SendCoinsDialog::processSendCoinsReturn(
     const WalletModel::SendCoinsReturn &sendCoinsReturn,
     const QString &msgArg) {
     QPair<QString, CClientUIInterface::MessageBoxFlags> msgParams;
     // Default to a warning message, override if error message is needed
     msgParams.second = CClientUIInterface::MSG_WARNING;
 
     // This comment is specific to SendCoinsDialog usage of
     // WalletModel::SendCoinsReturn.
     // All status values are used only in WalletModel::prepareTransaction()
     switch (sendCoinsReturn.status) {
         case WalletModel::InvalidAddress:
             msgParams.first =
                 tr("The recipient address is not valid. Please recheck.");
             break;
         case WalletModel::InvalidAmount:
             msgParams.first = tr("The amount to pay must be larger than 0.");
             break;
         case WalletModel::AmountExceedsBalance:
             msgParams.first = tr("The amount exceeds your balance.");
             break;
         case WalletModel::AmountWithFeeExceedsBalance:
             msgParams.first = tr("The total exceeds your balance when the %1 "
                                  "transaction fee is included.")
                                   .arg(msgArg);
             break;
         case WalletModel::DuplicateAddress:
             msgParams.first = tr("Duplicate address found: addresses should "
                                  "only be used once each.");
             break;
         case WalletModel::TransactionCreationFailed:
             msgParams.first = tr("Transaction creation failed!");
             msgParams.second = CClientUIInterface::MSG_ERROR;
             break;
         case WalletModel::AbsurdFee:
             msgParams.first =
                 tr("A fee higher than %1 is considered an absurdly high fee.")
                     .arg(BitcoinUnits::formatWithUnit(
                         model->getOptionsModel()->getDisplayUnit(),
                         model->wallet().getDefaultMaxTxFee()));
             break;
         case WalletModel::PaymentRequestExpired:
             msgParams.first = tr("Payment request expired.");
             msgParams.second = CClientUIInterface::MSG_ERROR;
             break;
         // included to prevent a compiler warning.
         case WalletModel::OK:
         default:
             return;
     }
 
     Q_EMIT message(tr("Send Coins"), msgParams.first, msgParams.second);
 }
 
 void SendCoinsDialog::minimizeFeeSection(bool fMinimize) {
     ui->labelFeeMinimized->setVisible(fMinimize);
     ui->buttonChooseFee->setVisible(fMinimize);
     ui->buttonMinimizeFee->setVisible(!fMinimize);
     ui->frameFeeSelection->setVisible(!fMinimize);
     ui->horizontalLayoutSmartFee->setContentsMargins(0, (fMinimize ? 0 : 6), 0,
                                                      0);
     fFeeMinimized = fMinimize;
 }
 
 void SendCoinsDialog::on_buttonChooseFee_clicked() {
     minimizeFeeSection(false);
 }
 
 void SendCoinsDialog::on_buttonMinimizeFee_clicked() {
     updateFeeMinimizedLabel();
     minimizeFeeSection(true);
 }
 
 void SendCoinsDialog::useAvailableBalance(SendCoinsEntry *entry) {
     // Get CCoinControl instance if CoinControl is enabled or create a new one.
     CCoinControl coin_control;
     if (model->getOptionsModel()->getCoinControlFeatures()) {
         coin_control = *CoinControlDialog::coinControl();
     }
 
     // Include watch-only for wallets without private key
     coin_control.fAllowWatchOnly = model->wallet().privateKeysDisabled();
 
     // Calculate available amount to send.
     Amount amount = model->wallet().getAvailableBalance(coin_control);
     for (int i = 0; i < ui->entries->count(); ++i) {
         SendCoinsEntry *e =
             qobject_cast<SendCoinsEntry *>(ui->entries->itemAt(i)->widget());
         if (e && !e->isHidden() && e != entry) {
             amount -= e->getValue().amount;
         }
     }
 
     if (amount > Amount::zero()) {
         entry->checkSubtractFeeFromAmount();
         entry->setAmount(amount);
     } else {
         entry->setAmount(Amount::zero());
     }
 }
 
-void SendCoinsDialog::setMinimumFee() {
-    ui->customFee->setValue(model->wallet().getRequiredFee(1000));
-}
-
 void SendCoinsDialog::updateFeeSectionControls() {
     ui->labelSmartFee->setEnabled(ui->radioSmartFee->isChecked());
     ui->labelSmartFee2->setEnabled(ui->radioSmartFee->isChecked());
     ui->labelFeeEstimation->setEnabled(ui->radioSmartFee->isChecked());
-    ui->checkBoxMinimumFee->setEnabled(ui->radioCustomFee->isChecked());
-    ui->labelMinFeeWarning->setEnabled(ui->radioCustomFee->isChecked());
-    ui->labelCustomPerKilobyte->setEnabled(
-        ui->radioCustomFee->isChecked() &&
-        !ui->checkBoxMinimumFee->isChecked());
-    ui->customFee->setEnabled(ui->radioCustomFee->isChecked() &&
-                              !ui->checkBoxMinimumFee->isChecked());
+    ui->labelCustomFeeWarning->setEnabled(ui->radioCustomFee->isChecked());
+    ui->labelCustomPerKilobyte->setEnabled(ui->radioCustomFee->isChecked());
+    ui->customFee->setEnabled(ui->radioCustomFee->isChecked());
 }
 
 void SendCoinsDialog::updateFeeMinimizedLabel() {
     if (!model || !model->getOptionsModel()) {
         return;
     }
 
     if (ui->radioSmartFee->isChecked()) {
         ui->labelFeeMinimized->setText(ui->labelSmartFee->text());
     } else {
         ui->labelFeeMinimized->setText(
             BitcoinUnits::formatWithUnit(
                 model->getOptionsModel()->getDisplayUnit(),
                 ui->customFee->value()) +
             "/kB");
     }
 }
 
-void SendCoinsDialog::updateMinFeeLabel() {
-    if (model && model->getOptionsModel()) {
-        ui->checkBoxMinimumFee->setText(
-            tr("Pay only the required fee of %1")
-                .arg(BitcoinUnits::formatWithUnit(
-                         model->getOptionsModel()->getDisplayUnit(),
-                         model->wallet().getRequiredFee(1000)) +
-                     "/kB"));
-    }
-}
-
 void SendCoinsDialog::updateCoinControlState(CCoinControl &ctrl) {
     if (ui->radioCustomFee->isChecked()) {
         ctrl.m_feerate = CFeeRate(ui->customFee->value());
     } else {
         ctrl.m_feerate.reset();
     }
     // Include watch-only for wallets without private key
     ctrl.fAllowWatchOnly = model->wallet().privateKeysDisabled();
 }
 
 void SendCoinsDialog::updateSmartFeeLabel() {
     if (!model || !model->getOptionsModel()) {
         return;
     }
 
     CCoinControl coin_control;
     updateCoinControlState(coin_control);
     // Explicitly use only fee estimation rate for smart fee labels
     coin_control.m_feerate.reset();
     CFeeRate feeRate(model->wallet().getMinimumFee(1000, coin_control));
 
     ui->labelSmartFee->setText(
         BitcoinUnits::formatWithUnit(model->getOptionsModel()->getDisplayUnit(),
                                      feeRate.GetFeePerK()) +
         "/kB");
     // not enough data => minfee
     if (feeRate <= CFeeRate(Amount::zero())) {
         // (Smart fee not initialized yet. This usually takes a few blocks...)
         ui->labelSmartFee2->show();
         ui->labelFeeEstimation->setText("");
     } else {
         ui->labelSmartFee2->hide();
         ui->labelFeeEstimation->setText(
             tr("Estimated to begin confirmation by next block."));
     }
 
     updateFeeMinimizedLabel();
 }
 
 // Coin Control: copy label "Quantity" to clipboard
 void SendCoinsDialog::coinControlClipboardQuantity() {
     GUIUtil::setClipboard(ui->labelCoinControlQuantity->text());
 }
 
 // Coin Control: copy label "Amount" to clipboard
 void SendCoinsDialog::coinControlClipboardAmount() {
     GUIUtil::setClipboard(ui->labelCoinControlAmount->text().left(
         ui->labelCoinControlAmount->text().indexOf(" ")));
 }
 
 // Coin Control: copy label "Fee" to clipboard
 void SendCoinsDialog::coinControlClipboardFee() {
     GUIUtil::setClipboard(
         ui->labelCoinControlFee->text()
             .left(ui->labelCoinControlFee->text().indexOf(" "))
             .replace(ASYMP_UTF8, ""));
 }
 
 // Coin Control: copy label "After fee" to clipboard
 void SendCoinsDialog::coinControlClipboardAfterFee() {
     GUIUtil::setClipboard(
         ui->labelCoinControlAfterFee->text()
             .left(ui->labelCoinControlAfterFee->text().indexOf(" "))
             .replace(ASYMP_UTF8, ""));
 }
 
 // Coin Control: copy label "Bytes" to clipboard
 void SendCoinsDialog::coinControlClipboardBytes() {
     GUIUtil::setClipboard(
         ui->labelCoinControlBytes->text().replace(ASYMP_UTF8, ""));
 }
 
 // Coin Control: copy label "Dust" to clipboard
 void SendCoinsDialog::coinControlClipboardLowOutput() {
     GUIUtil::setClipboard(ui->labelCoinControlLowOutput->text());
 }
 
 // Coin Control: copy label "Change" to clipboard
 void SendCoinsDialog::coinControlClipboardChange() {
     GUIUtil::setClipboard(
         ui->labelCoinControlChange->text()
             .left(ui->labelCoinControlChange->text().indexOf(" "))
             .replace(ASYMP_UTF8, ""));
 }
 
 // Coin Control: settings menu - coin control enabled/disabled by user
 void SendCoinsDialog::coinControlFeatureChanged(bool checked) {
     ui->frameCoinControl->setVisible(checked);
 
     // coin control features disabled
     if (!checked && model) {
         CoinControlDialog::coinControl()->SetNull();
     }
 
     coinControlUpdateLabels();
 }
 
 // Coin Control: button inputs -> show actual coin control dialog
 void SendCoinsDialog::coinControlButtonClicked() {
     CoinControlDialog dlg(platformStyle);
     dlg.setModel(model);
     dlg.exec();
     coinControlUpdateLabels();
 }
 
 // Coin Control: checkbox custom change address
 void SendCoinsDialog::coinControlChangeChecked(int state) {
     if (state == Qt::Unchecked) {
         CoinControlDialog::coinControl()->destChange = CNoDestination();
         ui->labelCoinControlChangeLabel->clear();
     } else {
         // use this to re-validate an already entered address
         coinControlChangeEdited(ui->lineEditCoinControlChange->text());
     }
 
     ui->lineEditCoinControlChange->setEnabled((state == Qt::Checked));
 }
 
 // Coin Control: custom change address changed
 void SendCoinsDialog::coinControlChangeEdited(const QString &text) {
     if (model && model->getAddressTableModel()) {
         // Default to no change address until verified
         CoinControlDialog::coinControl()->destChange = CNoDestination();
         ui->labelCoinControlChangeLabel->setStyleSheet("QLabel{color:red;}");
 
         const CTxDestination dest =
             DecodeDestination(text.toStdString(), model->getChainParams());
 
         if (text.isEmpty()) {
             // Nothing entered
             ui->labelCoinControlChangeLabel->setText("");
         } else if (!IsValidDestination(dest)) {
             // Invalid address
             ui->labelCoinControlChangeLabel->setText(
                 tr("Warning: Invalid Bitcoin address"));
         } else {
             // Valid address
             if (!model->wallet().isSpendable(dest)) {
                 ui->labelCoinControlChangeLabel->setText(
                     tr("Warning: Unknown change address"));
 
                 // confirmation dialog
                 QMessageBox::StandardButton btnRetVal = QMessageBox::question(
                     this, tr("Confirm custom change address"),
                     tr("The address you selected for change is not part of "
                        "this wallet. Any or all funds in your wallet may be "
                        "sent to this address. Are you sure?"),
                     QMessageBox::Yes | QMessageBox::Cancel,
                     QMessageBox::Cancel);
 
                 if (btnRetVal == QMessageBox::Yes) {
                     CoinControlDialog::coinControl()->destChange = dest;
                 } else {
                     ui->lineEditCoinControlChange->setText("");
                     ui->labelCoinControlChangeLabel->setStyleSheet(
                         "QLabel{color:black;}");
                     ui->labelCoinControlChangeLabel->setText("");
                 }
             } else {
                 // Known change address
                 ui->labelCoinControlChangeLabel->setStyleSheet(
                     "QLabel{color:black;}");
 
                 // Query label
                 QString associatedLabel =
                     model->getAddressTableModel()->labelForAddress(text);
                 if (!associatedLabel.isEmpty()) {
                     ui->labelCoinControlChangeLabel->setText(associatedLabel);
                 } else {
                     ui->labelCoinControlChangeLabel->setText(tr("(no label)"));
                 }
 
                 CoinControlDialog::coinControl()->destChange = dest;
             }
         }
     }
 }
 
 // Coin Control: update labels
 void SendCoinsDialog::coinControlUpdateLabels() {
     if (!model || !model->getOptionsModel()) {
         return;
     }
 
     updateCoinControlState(*CoinControlDialog::coinControl());
 
     // set pay amounts
     CoinControlDialog::payAmounts.clear();
     CoinControlDialog::fSubtractFeeFromAmount = false;
     for (int i = 0; i < ui->entries->count(); ++i) {
         SendCoinsEntry *entry =
             qobject_cast<SendCoinsEntry *>(ui->entries->itemAt(i)->widget());
         if (entry && !entry->isHidden()) {
             SendCoinsRecipient rcp = entry->getValue();
             CoinControlDialog::payAmounts.append(rcp.amount);
             if (rcp.fSubtractFeeFromAmount) {
                 CoinControlDialog::fSubtractFeeFromAmount = true;
             }
         }
     }
 
     if (CoinControlDialog::coinControl()->HasSelected()) {
         // actual coin control calculation
         CoinControlDialog::updateLabels(model, this);
 
         // show coin control stats
         ui->labelCoinControlAutomaticallySelected->hide();
         ui->widgetCoinControl->show();
     } else {
         // hide coin control stats
         ui->labelCoinControlAutomaticallySelected->show();
         ui->widgetCoinControl->hide();
         ui->labelCoinControlInsuffFunds->hide();
     }
 }
 
 SendConfirmationDialog::SendConfirmationDialog(
     const QString &title, const QString &text, const QString &informative_text,
     const QString &detailed_text, int _secDelay,
     const QString &_confirmButtonText, QWidget *parent)
     : QMessageBox(parent), secDelay(_secDelay),
       confirmButtonText(_confirmButtonText) {
     setIcon(QMessageBox::Question);
     // On macOS, the window title is ignored (as required by the macOS
     // Guidelines).
     setWindowTitle(title);
     setText(text);
     setInformativeText(informative_text);
     setDetailedText(detailed_text);
     setStandardButtons(QMessageBox::Yes | QMessageBox::Cancel);
     setDefaultButton(QMessageBox::Cancel);
     yesButton = button(QMessageBox::Yes);
     updateYesButton();
     connect(&countDownTimer, &QTimer::timeout, this,
             &SendConfirmationDialog::countDown);
 }
 
 int SendConfirmationDialog::exec() {
     updateYesButton();
     countDownTimer.start(1000);
     return QMessageBox::exec();
 }
 
 void SendConfirmationDialog::countDown() {
     secDelay--;
     updateYesButton();
 
     if (secDelay <= 0) {
         countDownTimer.stop();
     }
 }
 
 void SendConfirmationDialog::updateYesButton() {
     if (secDelay > 0) {
         yesButton->setEnabled(false);
         yesButton->setText(confirmButtonText + " (" +
                            QString::number(secDelay) + ")");
     } else {
         yesButton->setEnabled(true);
         yesButton->setText(confirmButtonText);
     }
 }
diff --git a/src/qt/sendcoinsdialog.h b/src/qt/sendcoinsdialog.h
index 65dbf397b..9856ade73 100644
--- a/src/qt/sendcoinsdialog.h
+++ b/src/qt/sendcoinsdialog.h
@@ -1,140 +1,138 @@
 // Copyright (c) 2011-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #ifndef BITCOIN_QT_SENDCOINSDIALOG_H
 #define BITCOIN_QT_SENDCOINSDIALOG_H
 
 #include <qt/walletmodel.h>
 
 #include <QDialog>
 #include <QMessageBox>
 #include <QString>
 #include <QTimer>
 
 class ClientModel;
 class PlatformStyle;
 class SendCoinsEntry;
 class SendCoinsRecipient;
 
 namespace Ui {
 class SendCoinsDialog;
 }
 
 QT_BEGIN_NAMESPACE
 class QUrl;
 QT_END_NAMESPACE
 
 /** Dialog for sending bitcoins */
 class SendCoinsDialog : public QDialog {
     Q_OBJECT
 
 public:
     SendCoinsDialog(const PlatformStyle *platformStyle, WalletModel *model,
                     QWidget *parent = nullptr);
     ~SendCoinsDialog();
 
     void setClientModel(ClientModel *clientModel);
     void setModel(WalletModel *model);
 
     /**
      * Set up the tab chain manually, as Qt messes up the tab chain by default
      * in some cases (issue
      * https://bugreports.qt-project.org/browse/QTBUG-10907).
      */
     QWidget *setupTabChain(QWidget *prev);
 
     void setAddress(const QString &address);
     void pasteEntry(const SendCoinsRecipient &rv);
     bool handlePaymentRequest(const SendCoinsRecipient &recipient);
 
 public Q_SLOTS:
     void clear();
     void reject() override;
     void accept() override;
     SendCoinsEntry *addEntry();
     void updateTabsAndLabels();
     void setBalance(const interfaces::WalletBalances &balances);
 
 Q_SIGNALS:
     void coinsSent(const uint256 &txid);
 
 private:
     Ui::SendCoinsDialog *ui;
     ClientModel *clientModel;
     WalletModel *model;
     std::unique_ptr<WalletModelTransaction> m_current_transaction;
     bool fNewRecipientAllowed;
     bool fFeeMinimized;
     const PlatformStyle *platformStyle;
 
     // Process WalletModel::SendCoinsReturn and generate a pair consisting of a
     // message and message flags for use in Q_EMIT message().
     // Additional parameter msgArg can be used via .arg(msgArg).
     void
     processSendCoinsReturn(const WalletModel::SendCoinsReturn &sendCoinsReturn,
                            const QString &msgArg = QString());
     void minimizeFeeSection(bool fMinimize);
     // Format confirmation message
     bool PrepareSendText(QString &question_string, QString &informative_text,
                          QString &detailed_text);
     void updateFeeMinimizedLabel();
     // Update the passed in CCoinControl with state from the GUI
     void updateCoinControlState(CCoinControl &ctrl);
 
 private Q_SLOTS:
     void on_sendButton_clicked();
     void on_buttonChooseFee_clicked();
     void on_buttonMinimizeFee_clicked();
     void removeEntry(SendCoinsEntry *entry);
     void useAvailableBalance(SendCoinsEntry *entry);
     void updateDisplayUnit();
     void coinControlFeatureChanged(bool);
     void coinControlButtonClicked();
     void coinControlChangeChecked(int);
     void coinControlChangeEdited(const QString &);
     void coinControlUpdateLabels();
     void coinControlClipboardQuantity();
     void coinControlClipboardAmount();
     void coinControlClipboardFee();
     void coinControlClipboardAfterFee();
     void coinControlClipboardBytes();
     void coinControlClipboardLowOutput();
     void coinControlClipboardChange();
-    void setMinimumFee();
     void updateFeeSectionControls();
-    void updateMinFeeLabel();
     void updateSmartFeeLabel();
 
 Q_SIGNALS:
     // Fired when a message should be reported to the user
     void message(const QString &title, const QString &message,
                  unsigned int style);
 };
 
 #define SEND_CONFIRM_DELAY 3
 
 class SendConfirmationDialog : public QMessageBox {
     Q_OBJECT
 
 public:
     SendConfirmationDialog(const QString &title, const QString &text,
                            const QString &informative_text = "",
                            const QString &detailed_text = "",
                            int secDelay = SEND_CONFIRM_DELAY,
                            const QString &confirmText = "Send",
                            QWidget *parent = nullptr);
     int exec();
 
 private Q_SLOTS:
     void countDown();
     void updateYesButton();
 
 private:
     QAbstractButton *yesButton;
     QTimer countDownTimer;
     int secDelay;
     QString confirmButtonText;
 };
 
 #endif // BITCOIN_QT_SENDCOINSDIALOG_H