diff --git a/electrum/gui/qml/qeaddressdetails.py b/electrum/gui/qml/qeaddressdetails.py
index c17f50d4c..fbe110127 100644
--- a/electrum/gui/qml/qeaddressdetails.py
+++ b/electrum/gui/qml/qeaddressdetails.py
@@ -36,7 +36,7 @@ class QEAddressDetails(AuthMixin, QObject):
 
     walletChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=walletChanged)
-    def wallet(self):
+    def wallet(self) -> QEWallet:
         return self._wallet
 
     @wallet.setter
diff --git a/electrum/gui/qml/qechannelopener.py b/electrum/gui/qml/qechannelopener.py
index f01fd7713..957aa30d2 100644
--- a/electrum/gui/qml/qechannelopener.py
+++ b/electrum/gui/qml/qechannelopener.py
@@ -55,7 +55,7 @@ class QEChannelOpener(QObject, AuthMixin):
 
     walletChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=walletChanged)
-    def wallet(self):
+    def wallet(self) -> QEWallet:
         return self._wallet
 
     @wallet.setter
@@ -80,7 +80,7 @@ class QEChannelOpener(QObject, AuthMixin):
 
     amountChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=amountChanged)
-    def amount(self):
+    def amount(self) -> QEAmount:
         return self._amount
 
     @amount.setter
diff --git a/electrum/gui/qml/qeinvoice.py b/electrum/gui/qml/qeinvoice.py
index e9d30fc32..696506ffd 100644
--- a/electrum/gui/qml/qeinvoice.py
+++ b/electrum/gui/qml/qeinvoice.py
@@ -112,7 +112,7 @@ class QEInvoice(QObject, QtEventListener):
 
     walletChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=walletChanged)
-    def wallet(self):
+    def wallet(self) -> QEWallet:
         return self._wallet
 
     @wallet.setter
@@ -155,7 +155,7 @@ class QEInvoice(QObject, QtEventListener):
         return self._amount
 
     @pyqtProperty(QVariant, notify=amountOverrideChanged)
-    def amountOverride(self):
+    def amountOverride(self) -> QEAmount:
         return self._amountOverride
 
     @amountOverride.setter
diff --git a/electrum/gui/qml/qelnpaymentdetails.py b/electrum/gui/qml/qelnpaymentdetails.py
index 2857c1828..94e96138c 100644
--- a/electrum/gui/qml/qelnpaymentdetails.py
+++ b/electrum/gui/qml/qelnpaymentdetails.py
@@ -28,7 +28,7 @@ class QELnPaymentDetails(QObject):
 
     walletChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=walletChanged)
-    def wallet(self):
+    def wallet(self) -> QEWallet:
         return self._wallet
 
     @wallet.setter
diff --git a/electrum/gui/qml/qerequestdetails.py b/electrum/gui/qml/qerequestdetails.py
index 37fd70b5c..f0f2155e9 100644
--- a/electrum/gui/qml/qerequestdetails.py
+++ b/electrum/gui/qml/qerequestdetails.py
@@ -75,7 +75,7 @@ class QERequestDetails(QObject, QtEventListener):
 
     walletChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=walletChanged)
-    def wallet(self):
+    def wallet(self) -> QEWallet:
         return self._wallet
 
     @wallet.setter
diff --git a/electrum/gui/qml/qeswaphelper.py b/electrum/gui/qml/qeswaphelper.py
index c112acf42..8bbf9483d 100644
--- a/electrum/gui/qml/qeswaphelper.py
+++ b/electrum/gui/qml/qeswaphelper.py
@@ -206,7 +206,7 @@ class QESwapHelper(AuthMixin, QObject, QtEventListener):
 
     walletChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=walletChanged)
-    def wallet(self):
+    def wallet(self) -> QEWallet:
         return self._wallet
 
     @wallet.setter
@@ -296,11 +296,11 @@ class QESwapHelper(AuthMixin, QObject, QtEventListener):
 
     tosendChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=tosendChanged)
-    def tosend(self):
+    def tosend(self) -> QEAmount:
         return self._tosend
 
     @tosend.setter
-    def tosend(self, tosend):
+    def tosend(self, tosend: QEAmount):
         assert tosend is None or isinstance(tosend, QEAmount)
         if self._tosend != tosend:
             self._tosend = tosend
@@ -308,11 +308,11 @@ class QESwapHelper(AuthMixin, QObject, QtEventListener):
 
     toreceiveChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=toreceiveChanged)
-    def toreceive(self):
+    def toreceive(self) -> QEAmount:
         return self._toreceive
 
     @toreceive.setter
-    def toreceive(self, toreceive):
+    def toreceive(self, toreceive: QEAmount):
         assert toreceive is None or isinstance(toreceive, QEAmount)
         if self._toreceive != toreceive:
             self._toreceive = toreceive
@@ -320,11 +320,11 @@ class QESwapHelper(AuthMixin, QObject, QtEventListener):
 
     serverMiningfeeChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=serverMiningfeeChanged)
-    def serverMiningfee(self):
+    def serverMiningfee(self) -> QEAmount:
         return self._server_miningfee
 
     @serverMiningfee.setter
-    def serverMiningfee(self, server_miningfee):
+    def serverMiningfee(self, server_miningfee: QEAmount):
         assert server_miningfee is None or isinstance(server_miningfee, QEAmount)
         if self._server_miningfee != server_miningfee:
             self._server_miningfee = server_miningfee
@@ -343,11 +343,11 @@ class QESwapHelper(AuthMixin, QObject, QtEventListener):
 
     miningfeeChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=miningfeeChanged)
-    def miningfee(self):
+    def miningfee(self) -> QEAmount:
         return self._miningfee
 
     @miningfee.setter
-    def miningfee(self, miningfee):
+    def miningfee(self, miningfee: QEAmount):
         assert miningfee is None or isinstance(miningfee, QEAmount)
         if self._miningfee != miningfee:
             self._miningfee = miningfee
diff --git a/electrum/gui/qml/qetxdetails.py b/electrum/gui/qml/qetxdetails.py
index cfbf2f67a..a5e4dabe0 100644
--- a/electrum/gui/qml/qetxdetails.py
+++ b/electrum/gui/qml/qetxdetails.py
@@ -104,7 +104,7 @@ class QETxDetails(QObject, QtEventListener):
 
     walletChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=walletChanged)
-    def wallet(self):
+    def wallet(self) -> QEWallet:
         return self._wallet
 
     @wallet.setter
diff --git a/electrum/gui/qml/qetxfinalizer.py b/electrum/gui/qml/qetxfinalizer.py
index 2e46eb0f7..d0457c80e 100644
--- a/electrum/gui/qml/qetxfinalizer.py
+++ b/electrum/gui/qml/qetxfinalizer.py
@@ -69,7 +69,7 @@ class FeeSlider(QObject):
 
     walletChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=walletChanged)
-    def wallet(self):
+    def wallet(self) -> QEWallet:
         return self._wallet
 
     @wallet.setter
@@ -172,11 +172,11 @@ class TxFeeSlider(FeeSlider):
 
     feeChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=feeChanged)
-    def fee(self):
+    def fee(self) -> QEAmount:
         return self._fee
 
     @fee.setter
-    def fee(self, fee):
+    def fee(self, fee: QEAmount):
         assert fee is None or isinstance(fee, QEAmount)
         if self._fee != fee:
             self._fee.copyFrom(fee)
@@ -422,7 +422,7 @@ class QETxFinalizer(TxFeeSlider):
 
     amountChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=amountChanged)
-    def amount(self):
+    def amount(self) -> QEAmount:
         return self._amount
 
     @amount.setter
@@ -440,7 +440,7 @@ class QETxFinalizer(TxFeeSlider):
 
     extraFeeChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=extraFeeChanged)
-    def extraFee(self):
+    def extraFee(self) -> QEAmount:
         return self._extraFee
 
     @extraFee.setter
@@ -671,7 +671,7 @@ class QETxRbfFeeBumper(TxFeeSlider, TxMonMixin):
 
     oldfeeChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=oldfeeChanged)
-    def oldfee(self):
+    def oldfee(self) -> QEAmount:
         return self._oldfee
 
     @oldfee.setter
@@ -812,7 +812,7 @@ class QETxCanceller(TxFeeSlider, TxMonMixin):
 
     oldfeeChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=oldfeeChanged)
-    def oldfee(self):
+    def oldfee(self) -> QEAmount:
         return self._oldfee
 
     @oldfee.setter
@@ -945,7 +945,7 @@ class QETxCpfpFeeBumper(TxFeeSlider, TxMonMixin):
 
     totalFeeChanged = pyqtSignal()
     @pyqtProperty(QVariant, notify=totalFeeChanged)
-    def totalFee(self):
+    def totalFee(self) -> QEAmount:
         return self._total_fee
 
     @totalFee.setter