feat: show loading image on the button when sending

src/app/wallet/view.nim

@@ -275,16 +275,22 @@ QtObject:
     except RpcException as e:
       result = $(%* { "error": %* { "message": %e.msg }})
 
-  proc sendTransaction*(self: WalletView, from_addr: string, to: string, assetAddress: string, value: string, gas: string, gasPrice: string, password: string): string {.slot.} =
+  proc transactionWasSent*(self: WalletView, txResult: string) {.signal.}
+
+  proc transactionSent(self: WalletView, txResult: string) {.slot.} =
+    self.transactionWasSent(txResult)
+
+  proc sendTransaction*(self: WalletView, from_addr: string, to: string, assetAddress: string, value: string, gas: string, gasPrice: string, password: string) {.slot.} =
+    let tokens = self.status.wallet.tokens
     try:
-      var response = ""
-      if assetAddress != ZERO_ADDRESS and not assetAddress.isEmptyOrWhitespace:
-        response = self.status.wallet.sendTokenTransaction(from_addr, to, assetAddress, value, gas, gasPrice, password)
-      else:
-        response = self.status.wallet.sendTransaction(from_addr, to, value, gas, gasPrice, password)
-      result = $(%* { "result": %response })
+      spawnAndSend(self, "transactionSent") do:
+        $(%status_wallet.sendTransaction(tokens, from_addr, to, assetAddress, value, gas, gasPrice, password))
     except RpcException as e:
-      result = $(%* { "error": %* { "message": %e.msg }})
+      self.transactionSent($(%*{
+        "error": %*{
+          "message": e.msg
+        }
+      }))
 
   proc getDefaultAccount*(self: WalletView): string {.slot.} =
     self.currentAccount.address

src/status/libstatus/wallet.nim

@@ -1,5 +1,8 @@
-import json, json, options, json_serialization, stint, chronicles
+import json, json, options, json_serialization, stint, chronicles, tables
 import core, types, utils, strutils, strformat
+import eth/common/utils as eth_utils
+import accounts/constants as constants
+import ./coder as coder
 from nim_status import validateMnemonic, startWallet
 import ../wallet/account
 import ./eth/contracts as contractMethods
@@ -65,6 +68,46 @@ proc getTransfersByAddress*(address: string): seq[types.Transaction] =
     let msg = getCurrentExceptionMsg()
     error "Failed getting wallet account transactions", msg
 
+proc sendTransaction*(tx: EthSend, password: string): RpcResponse =
+  let responseStr = core.sendTransaction($(%tx), password)
+  result = Json.decode(responseStr, RpcResponse)
+  if not result.error.isNil:
+    raise newException(RpcException, "Error sending transaction: " & result.error.message)
+
+  trace "Transaction sent succesfully", hash=result
+
+proc sendTransaction*(tokens: JsonNode, source, to, assetAddress, value, gas, gasPrice, password: string): RpcResponse =
+  var
+    weiValue = eth2Wei(parseFloat(value), 18) # ETH
+    data = ""
+    toAddr = eth_utils.parseAddress(to)
+  let gasPriceInWei = gwei2Wei(parseFloat(gasPrice))
+
+  # TODO: this code needs to be tested with testnet assets (to be implemented in
+  # a future PR
+  if assetAddress != constants.ZERO_ADDRESS and not assetAddress.isEmptyOrWhitespace:
+    let
+      token = tokens.first("address", assetAddress)
+      contract = contractMethods.getContract("snt")
+      transfer = coder.Transfer(to: toAddr, value: eth2Wei(parseFloat(value), token["decimals"].getInt))
+    weiValue = 0.u256
+    let transferThing = contract.methods["transfer"]
+    data = transferThing.encodeAbi(transfer)
+    toAddr = eth_utils.parseAddress(assetAddress)
+
+  let tx = EthSend(
+    source: eth_utils.parseAddress(source),
+    to: toAddr.some,
+    gas: (if gas.isEmptyOrWhitespace: Quantity.none else: Quantity(cast[uint64](parseFloat(gas).toUInt64)).some),
+    gasPrice: (if gasPrice.isEmptyOrWhitespace: int.none else: gwei2Wei(parseFloat(gasPrice)).truncate(int).some),
+    value: weiValue.some,
+    data: data
+  )
+  try:
+    result = sendTransaction(tx, password)
+  except RpcException as e:
+    raise
+
 proc getBalance*(address: string): string =
   let payload = %* [address, "latest"]
   let response = parseJson(callPrivateRPC("eth_getBalance", payload))

ui/app/AppLayouts/Wallet/SendModal.qml

@@ -8,6 +8,10 @@ import "../../../shared/status"
 import "./components"
 
 ModalPopup {
+    property bool sending: false
+    property string oldButtonText
+    property int oldButtonWidth
+
     id: root
 
     //% "Send"
@@ -36,26 +40,18 @@ ModalPopup {
     }
 
     function sendTransaction() {
-        let responseStr = walletModel.sendTransaction(selectFromAccount.selectedAccount.address,
+        sending = true
+        oldButtonText = btnNext.label
+        oldButtonWidth = btnNext.width
+        btnNext.label = ""
+        btnNext.width = oldButtonWidth
+        walletModel.sendTransaction(selectFromAccount.selectedAccount.address,
                                                  selectRecipient.selectedRecipient.address,
                                                  txtAmount.selectedAsset.address,
                                                  txtAmount.selectedAmount,
                                                  gasSelector.selectedGasLimit,
                                                  gasSelector.selectedGasPrice,
                                                  transactionSigner.enteredPassword)
-        let response = JSON.parse(responseStr)
-
-        if (response.error) {
-            if (response.error.message.includes("could not decrypt key with given password")){
-                transactionSigner.validationError = qsTr("Wrong password")
-                return
-            }
-            sendingError.text = response.error.message
-            return sendingError.open()
-        }
-
-        sendingSuccess.text = qsTr("Transaction sent to the blockchain. You can watch the progress on Etherscan: %2/%1").arg(response.result).arg(walletModel.etherscanLink)
-        sendingSuccess.open()
     }
 
     TransactionStackView {
@@ -258,7 +254,7 @@ ModalPopup {
             id: btnNext
             anchors.right: parent.right
             label: qsTr("Next")
-            disabled: !stack.currentGroup.isValid || stack.currentGroup.isPending
+            disabled: !stack.currentGroup.isValid || stack.currentGroup.isPending || root.sending
             onClicked: {
                 const validity = stack.currentGroup.validate()
                 if (validity.isValid && !validity.isPending) {
@@ -268,6 +264,42 @@ ModalPopup {
                     stack.next()
                 }
             }
+
+            Loader {
+                active: root.sending
+                sourceComponent: loadingImage
+                anchors.verticalCenter: parent.verticalCenter
+                anchors.horizontalCenter: parent.horizontalCenter
+            }
+
+            Component {
+                id: loadingImage
+                LoadingImage {}
+            }
+        }
+        Connections {
+            target: walletModel
+            onTransactionWasSent: {
+                try {
+                    root.sending = false
+                    btnNext.label = root.oldButtonText
+                    let response = JSON.parse(txResult)
+
+                    if (response.error) {
+                        if (response.error.message.includes("could not decrypt key with given password")){
+                            transactionSigner.validationError = qsTr("Wrong password")
+                            return
+                        }
+                        sendingError.text = response.error.message
+                        return sendingError.open()
+                    }
+
+                    sendingSuccess.text = qsTr("Transaction sent to the blockchain. You can watch the progress on Etherscan: %2/%1").arg(response.result).arg(walletModel.etherscanLink)
+                    sendingSuccess.open()
+                } catch (e) {
+                    console.error('WOW', e)
+                }
+            }
         }
     }
 }