fix(@desktop/wallet): Fix for freeze in Approval stage in SwapModal

noticed only on linux

fixes #18627

Author: Khushboo-dev-cpp

src/app/modules/main/wallet_section/send/io_interface.nim

@@ -87,3 +87,6 @@ method getNetworkChainId*(self: AccessInterface, shortName: string): int {.base.
 
 method reevaluateSwap*(self: AccessInterface, uuid: string, chainId: int, isApprovalTx: bool) {.base.} =
   raise newException(ValueError, "No implementation available")
+
+method stopSuggestedRoutesAsyncCalculation*(self: AccessInterface) {.base.} =
+  raise newException(ValueError, "No implementation available")

src/app/modules/main/wallet_section/send/module.nim

@@ -362,6 +362,9 @@ method resetData*(self: Module) =
   self.controller.stopSuggestedRoutesAsyncCalculation()
   self.clearTmpData(keepPinPass = self.tmpClearLocalDataLater)
 
+method stopSuggestedRoutesAsyncCalculation*(self: Module) =
+  self.controller.stopSuggestedRoutesAsyncCalculation()
+
 method filterChanged*(self: Module, addresses: seq[string], chainIds: seq[int], isDirty: bool) =
   if not isDirty or addresses.len == 0:
     return
@@ -420,4 +423,4 @@ method reevaluateSwap*(self: Module, uuid: string, chainId: int, isApprovalTx: b
   const pathName = "Paraswap"
   let err = self.controller.reevaluateRouterPath(uuid, pathName, chainId, isApprovalTx)
   if err.len > 0:
-    error "reevaluateRouterPath failed: ", err=err
+    error "reevaluateRouterPath failed: ", err=err

src/app/modules/main/wallet_section/send/view.nim

@@ -238,6 +238,9 @@ QtObject:
     self.selectedAssetKey = ""
     self.showUnPreferredChains = false
 
+  proc stopSuggestedRoutesAsyncCalculation*(self: View) {.slot.} =
+    self.delegate.stopSuggestedRoutesAsyncCalculation()
+
   proc splitAndFormatAddressPrefix(self: View, text : string, updateInStore: bool): string {.slot.} =
     return self.delegate.splitAndFormatAddressPrefix(text, updateInStore)
 

ui/app/AppLayouts/Wallet/popups/swap/SwapModalAdaptor.qml

@@ -172,6 +172,7 @@ QObject {
                 if (uuid !== d.uuid || !!error) {
                     root.approvalPending = false
                     root.approvalSuccessful = false
+                    root.swapStore.stopSuggestedRoutesAsyncCalculation()
                     return
                 }
                 root.approvalPending = true

ui/app/AppLayouts/Wallet/stores/SwapStore.qml

@@ -43,6 +43,10 @@ QtObject {
         root.walletSectionSendInst.resetData()
     }
 
+    function stopSuggestedRoutesAsyncCalculation() {
+        root.walletSectionSendInst.stopSuggestedRoutesAsyncCalculation()
+    }
+
     function authenticateAndTransfer(uuid) {
         root.walletSectionSendInst.authenticateAndTransfer(uuid)
     }