fix(Update fees periodically): Implementing periodic fee update for airdrops, minting, self destruct and burning transactions

src/app_service/service/community_tokens/async_tasks.nim

@@ -100,8 +100,9 @@ const asyncGetRemoteBurnFeesTask: Task = proc(argEncoded: string) {.gcsafe, nimc
       "gasTable": tableToJsonArray(gasTable),
       "chainId": arg.chainId,
       "addressFrom": arg.addressFrom,
+      "error": "",
       "requestId": arg.requestId,
-      "error": "" })
+    })
   except Exception as e:
     arg.finish(%* {
       "error": e.msg,
@@ -130,8 +131,9 @@ const asyncGetBurnFeesTask: Task = proc(argEncoded: string) {.gcsafe, nimcall.}
       "gasTable": tableToJsonArray(gasTable),
       "chainId": arg.chainId,
       "addressFrom": arg.addressFrom,
-      "requestId": arg.requestId,
+      "error": "",
-      "error": "" })
+      "requestId": arg.requestId
+    })
   except Exception as e:
     arg.finish(%* {
       "error": e.msg,
@@ -163,15 +165,16 @@ const asyncGetMintFeesTask: Task = proc(argEncoded: string) {.gcsafe, nimcall.}
         arg.walletAddresses, collectibleAndAmount.amount).result.getInt
       gasTable[(chainId, collectibleAndAmount.communityToken.address)] = gas
     arg.finish(%* {
-      "requestId": arg.requestId,
       "feeTable": tableToJsonArray(feeTable),
       "gasTable": tableToJsonArray(gasTable),
       "addressFrom": arg.addressFrom,
-      "error": "" })
+      "error": "",
+      "requestId": arg.requestId
+    })
   except Exception as e:
     let output = %* {
-      "requestId": arg.requestId,
+      "error": e.msg,
-      "error": e.msg
+      "requestId": arg.requestId
     }
     arg.finish(output)
 

src/app_service/service/community_tokens/service.nim

@@ -656,8 +656,10 @@ QtObject:
       )
       self.threadpool.start(arg)
     except Exception as e:
-      #TODO: handle error - emit error signal
       error "Error loading airdrop fees", msg = e.msg
+      var dataToEmit = AirdropFeesArgs()
+      dataToEmit.errorCode =  ComputeFeeErrorCode.Other
+      self.events.emit(SIGNAL_COMPUTE_AIRDROP_FEE, dataToEmit)
 
   proc getFiatValue*(self: Service, cryptoBalance: float, cryptoSymbol: string): float =
     if (cryptoSymbol == ""):

storybook/pages/BurnTokensPopupPage.qml

@@ -68,24 +68,27 @@ SplitView {
 
                 onBurnClicked: logs.logEvent("BurnTokensPopup::onBurnClicked --> Burn amount: " + burnAmount)
                 onCancelClicked: logs.logEvent("BurnTokensPopup::onCancelClicked")
+                feeText: "0.0015 ETH ($75.43)"
+                feeErrorText: ""
+                isFeeLoading: false
 
-                onBurnFeesRequested: {
+                onSelectedAccountAddressChanged: {
-                    feeText = ""
+                    burnTokensPopup.isFeeLoading = true
-                    feeErrorText = ""
+                    timer.delay(2000, () => burnTokensPopup.isFeeLoading = false)
-                    isFeeLoading = true
+                }
-
+                onAmountToBurnChanged: {
-                    feeCalculationTimer.restart()
+                    burnTokensPopup.isFeeLoading = true
+                    timer.delay(2000, () => burnTokensPopup.isFeeLoading = false)
                 }
             }
 
             Timer {
-                id: feeCalculationTimer
+                id: timer
-
+                function delay(ms, callback) {
-                interval: 1000
+                    timer.interval = ms
-
+                    timer.repeat = false
-                onTriggered: {
+                    timer.triggered.connect(callback)
-                    burnTokensPopup.feeText = "0.0015 ETH ($75.43)"
+                    timer.start()
-                    burnTokensPopup.isFeeLoading = false
                 }
             }
         }

storybook/pages/CommunityTokenViewPage.qml

@@ -62,6 +62,9 @@ SplitView {
 
                 token: tokenObject
                 tokenOwnersModel: TokenHoldersModel {}
+                feeText: "0.01"
+                feeErrorText: ""
+                isFeeLoading: false
 
                 accounts: WalletAccountsModel {}
                 

storybook/pages/EditOwnerTokenViewPage.qml

@@ -53,7 +53,7 @@ SplitView {
 
                 onMintClicked: logs.logEvent("EditOwnerTokenView::onMintClicked")
 
-                onDeployFeesRequested: {
+                Component.onCompleted: {
                     feeText = ""
                     feeErrorText = ""
                     isFeeLoading = true

storybook/pages/MintTokensSettingsPanelPage.qml

@@ -30,13 +30,12 @@ SplitView {
     }
 
     Timer {
-        id: feesTimer
+        id: timer
-
+        function delay(delayTime, cb) {
-        interval: 1000
+            timer.interval = delayTime;
-
+            timer.repeat = false;
-        onTriggered: {
+            timer.triggered.connect(cb);
-            panel.isFeeLoading = false
+            timer.start();
-            panel.feeText = "0,0002 ETH (123,15 USD)"
         }
     }
 
@@ -48,6 +47,24 @@ SplitView {
         MintTokensSettingsPanel {
             id: panel
 
+            readonly property var singleTransactionFee: {
+                "ethCurrency": {
+                    "objectName":"",
+                    "amount":0.000007900500349933282,
+                    "symbol":"ETH",
+                    "displayDecimals":4,
+                    "stripTrailingZeroes":false
+                },
+                "fiatCurrency": {
+                    "objectName":"",
+                    "amount":0.012852533720433712,
+                    "symbol":"USD",
+                    "displayDecimals":2,
+                    "stripTrailingZeroes":false
+                },
+                "errorCode":0
+            }
+
             MintedTokensModel {
                 id: mintedTokensModel
             }
@@ -105,14 +122,9 @@ SplitView {
             onMintCollectible: logs.logEvent("CommunityMintTokensSettingsPanel::mintCollectible")
             onMintAsset: logs.logEvent("CommunityMintTokensSettingsPanel::mintAssets")
             onDeleteToken: logs.logEvent("CommunityMintTokensSettingsPanel::deleteToken: " + tokenKey)
-
+            onRegisterDeployFeesSubscriber: timer.delay(2000, () => feeSubscriber.feesResponse = panel.singleTransactionFee)
-            onDeployFeesRequested: {
+            onRegisterSelfDestructFeesSubscriber: timer.delay(2000, () => feeSubscriber.feesResponse = panel.singleTransactionFee)
-                feeText = ""
+            onRegisterBurnTokenFeesSubscriber: timer.delay(2000, () => feeSubscriber.feesResponse = panel.singleTransactionFee)
-                feeErrorText = ""
-                isFeeLoading = true
-
-                feesTimer.restart()
-            }
         }
     }
 

storybook/pages/RemotelyDestructPopupPage.qml

@@ -74,12 +74,6 @@ SplitView {
                                   ])
                     close()
                 }
-                onRemotelyDestructFeesRequested: {
-                    logs.logEvent("RemoteSelfDestructPopup::onRemotelyDestructFeesRequested",
-                                  ["walletsAndAmounts", "accountAddress"], [
-                                      JSON.stringify(walletsAndAmounts), accountAddress
-                                  ])
-                }
 
                 Component.onCompleted: {
                     open()

ui/StatusQ/src/StatusQ/Core/Utils/Subscription.qml

@@ -0,0 +1,13 @@
+import QtQuick 2.15
+
+QtObject {
+    id: root
+    
+    readonly property string subscriptionId: Utils.uuid()
+    
+    property bool isReady: false
+    property int notificationInterval: 3000 // 1 notification every 3 seconds
+    //The topic to subscribe to
+    property string topic: ""
+    property var response: {}
+}

ui/StatusQ/src/StatusQ/Core/Utils/SubscriptionBroker.qml

@@ -0,0 +1,228 @@
+import QtQuick 2.15
+
+//This is a helper component that is used to batch requests and send them periodically
+//It is used to reduce the number of requests sent to the server and notify different subscribers of the same request
+//It is used by the Subscription component
+QtObject {
+    id: root
+
+    signal request(string topic)
+
+    signal subscribed(string subscriptionId)
+    signal unsubscribed(string subscriptionId)
+
+    function response(topic, responseObj) {
+        d.onResponse(topic, responseObj)
+    }
+    function subscribe(subscription) {
+        d.subscribe(subscription)
+    }
+    function unsubscribe(subscription) {
+        d.unsubscribe(subscription)
+    }
+
+    property bool active: true
+
+    readonly property QtObject d: QtObject {
+        //Mapping subscriptionId to subscription object
+        //subscriptionId is a string and represents the id of the subscription
+        //E.g. "subscriptionId": {subscription: subscriptionObject, topic: "topic"}
+        //The purpose of this mapping is to keep track of the subscriptions and their topics
+        readonly property var managedSubscriptions: ({})
+
+        //Mapping topic to subscriptionIds and request data
+        //topic is a string and represents the topic of the subscription
+        //E.g. "topic": {nextRequestTimestamp: 0, requestInterval: 1000, subscriptions: ["subscriptionId1", "subscriptionId2"], response: null}
+        readonly property var topics: ({})
+        property int topicsCount: 0 //helper property to track change events
+
+        property bool requestIntervalTriggered: false
+        readonly property int requestInterval: {
+            //dependency:
+            d.topicsCount
+            d.requestIntervalTriggered
+
+            const topicInfos = Object.values(d.topics)
+            if(!topicsCount || topicInfos.length === 0)
+                return 0
+
+            const now = Date.now()
+            
+            const interval = topicInfos.reduce((minInterval, topicInfo) => Math.max(0, Math.min(minInterval, topicInfo.nextRequestTimestamp - now)), Number.MAX_SAFE_INTEGER)
+
+            return interval > 0 ? interval : requestInterval
+        }
+
+        readonly property Timer requestTimer: Timer {
+            interval: d.requestInterval
+            repeat: true
+            running: interval > 0 && root.active
+            onTriggered: d.periodicRequest()
+            triggeredOnStart: true
+        }
+
+        function subscribe(subscription) {
+            if(!(subscription instanceof Subscription)) 
+                return
+            if(d.managedSubscriptions.hasOwnProperty(subscription.subscriptionId)) 
+                return
+
+            registerToManagedSubscriptions(subscription)
+            connectToSubscriptionEvents(subscription)
+            if(subscription.isReady && subscription.topic)
+                registerToTopic(subscription.topic, subscription.subscriptionId)
+            root.subscribed(subscription.subscriptionId)
+        }
+
+        function unsubscribe(subscriptionId) {
+            if(!subscriptionId || !d.managedSubscriptions.hasOwnProperty(subscriptionId)) 
+                return
+
+            releaseManagedSubscription(subscriptionId)
+            root.unsubscribed(subscriptionId)
+        }
+
+        function registerToManagedSubscriptions(subscriptionObject) {
+            d.managedSubscriptions[subscriptionObject.subscriptionId] = {
+                subscription: subscriptionObject,
+                topic: subscriptionObject.topic,
+            }
+        }
+
+        function releaseManagedSubscription(subscriptionId) {
+            if(!subscriptionId || !d.managedSubscriptions.hasOwnProperty(subscriptionId)) return
+
+            const subscriptionInfo = d.managedSubscriptions[subscriptionId]
+
+            unregisterFromTopic(subscriptionInfo.topic, subscriptionId)
+            delete d.managedSubscriptions[subscriptionId]
+        }
+
+        function connectToSubscriptionEvents(subscription) {
+            const subscriptionId = subscription.subscriptionId
+            const topic = subscription.topic
+
+            const onTopicChangeHandler = () => {
+                if(!subscription.isReady || !d.managedSubscriptions.hasOwnProperty(subscriptionId)) return
+
+                const newTopic = subscription.topic
+                const oldTopic = d.managedSubscriptions[subscriptionId].topic
+
+                if(newTopic === oldTopic) return
+
+                d.unregisterFromTopic(oldTopic, subscriptionId)
+                d.registerToTopic(newTopic, subscriptionId)
+                d.managedSubscriptions[subscriptionId].topic = newTopic
+            }
+
+            const onReadyChangeHandler = () => {
+                if(!d.managedSubscriptions.hasOwnProperty(subscriptionId)) return
+
+                if(subscription.isReady) {
+                    d.registerToTopic(subscription.topic, subscription.subscriptionId)
+                } else {
+                    const subscriptionTopic = d.managedSubscriptions[subscriptionId].topic
+                    d.unregisterFromTopic(subscriptionTopic, subscriptionId)
+                }
+            }
+
+            const onUnsubscribedHandler = (subscriptionId) => {
+                if(subscriptionId !== subscription.subscriptionId)
+                    return
+
+                subscription.Component.onDestruction.disconnect(onDestructionHandler)
+                subscription.isReadyChanged.disconnect(onReadyChangeHandler)
+                subscription.topicChanged.disconnect(onTopicChangeHandler)
+            }
+
+            const onDestructionHandler = () => {
+                if(!d.managedSubscriptions.hasOwnProperty(subscriptionId))
+                    return
+                
+                root.unsubscribed.disconnect(onUnsubscribedHandler) //object is destroyed, no need to listen to the signal anymore
+                unsubscribe(subscriptionId)
+            }
+
+            subscription.Component.onDestruction.connect(onDestructionHandler)
+            subscription.isReadyChanged.connect(onReadyChangeHandler)
+            subscription.topicChanged.connect(onTopicChangeHandler)
+            root.unsubscribed.connect(onUnsubscribedHandler)
+        }
+
+        function registerToTopic(topic, subscriptionId) {
+            if(!d.topics.hasOwnProperty(topic)) {
+                d.topics[topic] = {
+                    requestInterval: d.managedSubscriptions[subscriptionId].subscription.notificationInterval,
+                    nextRequestTimestamp: Date.now() + d.managedSubscriptions[subscriptionId].subscription.notificationInterval,
+                    subscriptions: [],
+                    response: null,
+                    requestPending: false
+                }
+                d.topicsCount++
+            }
+
+            const index = d.topics[topic].subscriptions.indexOf(subscriptionId)
+            if(index !== -1) {
+                console.assert("Duplicate subscription: " + subscriptionId + " " + topic)
+                return
+            }
+
+            const subscriptionsCount = d.topics[topic].subscriptions.push(subscriptionId)
+            if(subscriptionsCount === 1 && root.active) {
+                d.request(topic)
+            }
+            d.managedSubscriptions[subscriptionId].subscription.response = d.topics[topic].response
+        }
+
+        function unregisterFromTopic(topic, subscriptionId) {
+            if(!d.topics.hasOwnProperty(topic)) return
+
+            const index = d.topics[topic].subscriptions.indexOf(subscriptionId)
+            if(index === -1) return
+
+            d.topics[topic].subscriptions.splice(index, 1)
+            if(d.topics[topic].subscriptions.length === 0) {
+                delete d.topics[topic]
+                d.topicsCount--
+            }
+        }
+
+        function periodicRequest() {
+            if(!d.topics || !d.topicsCount) return
+
+            Object.entries(d.topics).forEach(function(entry) {
+                const topic = entry[0]
+                const topicInfo = entry[1]
+
+                if(!topicInfo || 
+                   !topicInfo.subscriptions || 
+                   !topicInfo.subscriptions.length || 
+                   topicInfo.requestPending ||
+                   topicInfo.nextRequestTimestamp > Date.now()) 
+                    return
+
+                d.request(topic)
+            })
+            d.requestIntervalTriggered = !d.requestIntervalTriggered
+        }
+
+        function request(topic) {
+            if(!d.topics.hasOwnProperty(topic)) return
+
+            d.topics[topic].requestPending = true
+            d.topics[topic].nextRequestTimestamp = Date.now() + d.topics[topic].requestInterval
+            
+            root.request(topic)
+        }
+
+        function onResponse(topic, responseObj) {
+            if(!d.topics.hasOwnProperty(topic)) return
+
+            d.topics[topic].response = responseObj
+            d.topics[topic].subscriptions.forEach(function(subscriptionId) {
+                d.managedSubscriptions[subscriptionId].subscription.response = responseObj
+            })
+            d.topics[topic].requestPending = false
+        }
+    }
+}

ui/StatusQ/src/StatusQ/Core/Utils/qmldir

@@ -8,6 +8,8 @@ ModelChangeTracker 0.1 ModelChangeTracker.qml
 ModelsComparator 0.1 ModelsComparator.qml
 StackViewStates 0.1 StackViewStates.qml
 StatesStack 0.1 StatesStack.qml
+Subscription 0.1 Subscription.qml
+SubscriptionBroker 0.1 SubscriptionBroker.qml
 XSS 1.0 xss.js
 singleton AmountsArithmetic 0.1 AmountsArithmetic.qml
 singleton Emoji 0.1 Emoji.qml

ui/StatusQ/src/statusq.qrc

@@ -226,5 +226,7 @@
         <file>StatusQ/Controls/StatusBlockProgressBar.qml</file>
         <file>StatusQ/Components/StatusInfoBoxPanel.qml</file>
         <file>StatusQ/Controls/StatusWarningBox.qml</file>
+        <file>StatusQ/Core/Utils/Subscription.qml</file>
+        <file>StatusQ/Core/Utils/SubscriptionBroker.qml</file>
     </qresource>
 </RCC>

ui/StatusQ/tests/TestCore/TestUtils/tst_SubscriptionBroker.qml

@@ -0,0 +1,277 @@
+import QtQuick 2.15
+import QtTest 1.0
+
+import StatusQ.Core.Utils 0.1
+
+import StatusQ.TestHelpers 0.1
+
+TestCase {
+    id: testCase
+    name: "SubscriptionBroker"
+
+    Component {
+        id: subscriptionBrokerComponent
+        SubscriptionBroker {
+            id: subscriptionBroker
+
+            //Signal spies
+            readonly property SignalSpy requestSignalSpy: SignalSpy {
+                target: subscriptionBroker
+                signalName: "request"
+            }
+            readonly property SignalSpy subscribedSignalSpy: SignalSpy {
+                target: subscriptionBroker
+                signalName: "subscribed"
+            }
+            readonly property SignalSpy unsubscribedSignalSpy: SignalSpy {
+                target: subscriptionBroker
+                signalName: "unsubscribed"
+            }
+        }
+    }
+
+    Component {
+        id: subscriptionComponent
+        Subscription {
+            id: subscription
+        }
+    }
+
+    MonitorQtOutput {
+        id: qtOuput
+    }
+
+    function init() {
+        qtOuput.restartCapturing()
+    }
+
+    function test_new_instance() {
+        const subscriptionBroker = createTemporaryObject(subscriptionBrokerComponent, testCase)
+        verify(qtOuput.qtOuput().length === 0, `No output expected. Found:\n"${qtOuput.qtOuput()}"\n`)
+        verify(subscriptionBroker.active, "SubscriptionBroker should be active by default")
+        verify(subscriptionBroker.requestSignalSpy.valid == true, "request signal should be defined")
+        verify(subscriptionBroker.subscribedSignalSpy.valid == true, "subscribed signal should be defined")
+        verify(subscriptionBroker.unsubscribedSignalSpy.valid == true, "unsubscribed signal should be defined")
+        verify(subscriptionBroker.response != undefined, "response function should be defined")
+        verify(subscriptionBroker.subscribe != undefined, "subscribe function should be defined")
+        verify(subscriptionBroker.unsubscribe != undefined, "unsubscribe function should be defined")
+    }
+
+    function test_subscribe_invalid_subscription() {
+        const subscriptionBroker = createTemporaryObject(subscriptionBrokerComponent, testCase)
+        subscriptionBroker.subscribe(undefined)
+        compare(qtOuput.qtOuput().length, 0, `No output expected. Found:\n"${qtOuput.qtOuput()}"\n`)
+        compare(subscriptionBroker.requestSignalSpy.count, 0, "request signal should not be emitted")
+        compare(subscriptionBroker.subscribedSignalSpy.count, 0, "subscribed signal should not be emitted")
+        compare(subscriptionBroker.unsubscribedSignalSpy.count, 0, "unsubscribed signal should not be emitted")
+
+        const subscriptionAsEmptyObject = {}
+        subscriptionBroker.subscribe(subscriptionAsEmptyObject)
+
+        compare(qtOuput.qtOuput().length, 0, `No output expected. Found:\n"${qtOuput.qtOuput()}"\n`)
+        compare(subscriptionBroker.requestSignalSpy.count, 0, "request signal should not be emitted")
+        compare(subscriptionBroker.subscribedSignalSpy.count, 0, "subscribed signal should not be emitted")
+        compare(subscriptionBroker.unsubscribedSignalSpy.count, 0, "unsubscribed signal should not be emitted")
+    }
+
+    function test_subscribe_valid_subscription_object() {
+        const subscriptionBroker = createTemporaryObject(subscriptionBrokerComponent, testCase)
+        const subscription = createTemporaryObject(subscriptionComponent, testCase)
+        verify(subscription.subscriptionId != "", "subscription should have an id")
+
+        subscriptionBroker.subscribe(subscription)
+        compare(qtOuput.qtOuput().length, 0, `No output expected. Found:\n"${qtOuput.qtOuput()}"\n`)
+        compare(subscriptionBroker.subscribedSignalSpy.count, 1, "subscribed signal should be emitted")
+        compare(subscriptionBroker.subscribedSignalSpy.signalArguments[0][0], subscription.subscriptionId, "subscribed signal should be emitted with the subscription id")
+        compare(subscriptionBroker.unsubscribedSignalSpy.count, 0, "unsubscribed signal should not be emitted")
+        compare(subscriptionBroker.requestSignalSpy.count, 0, "request signal should not be emitted. Subscription is inactive by default. Broker is inactive by default.")
+        
+        subscriptionBroker.unsubscribe(subscription.subscriptionId)
+        compare(subscriptionBroker.subscribedSignalSpy.count, 1, "subscribed signal should not be emitted for unsunbscribe")
+        compare(subscriptionBroker.unsubscribedSignalSpy.count, 1, "unsubscribed signal should be emitted")
+        compare(subscriptionBroker.unsubscribedSignalSpy.signalArguments[0][0], subscription.subscriptionId, "unsubscribed signal should be emitted with the subscription id")
+        compare(subscriptionBroker.requestSignalSpy.count, 0, "request signal should not be emitted")
+    }
+
+    function test_periodic_request_one_subscription() {
+        const subscriptionBroker = createTemporaryObject(subscriptionBrokerComponent, testCase)
+        const subscription = createTemporaryObject(subscriptionComponent, testCase, {topic: "topic1", isReady: true, notificationInterval: 50})
+
+        //Enable broker and subscription
+        //Verify that request signal is emitted after subscription
+        subscriptionBroker.active = true
+        subscriptionBroker.subscribe(subscription)
+        compare(subscriptionBroker.subscribedSignalSpy.count, 1, "subscribed signal should be emitted")
+        compare(subscriptionBroker.requestSignalSpy.count, 1, "request signal should be emitted")
+        compare(subscriptionBroker.requestSignalSpy.signalArguments[0][0], subscription.topic, "request signal should be emitted with the subscription topic")
+
+        //Verify that request signal is emitted after notificationInterval
+        //The broker expects a response before sending another request
+        subscriptionBroker.response(subscription.topic, "responseAsString")
+        compare(subscription.response, "responseAsString", "subscription response should be updated")
+
+        //first interval - check for one request every 50ms:
+        compare(subscriptionBroker.requestSignalSpy.count, 1, "request signal should not be emitted")
+        tryCompare(subscriptionBroker.requestSignalSpy, "count", 2, 90 /*40ms error margin*/, "request signal should be emitted after 50ms. Actual signal count: " + subscriptionBroker.requestSignalSpy.count)
+        compare(subscriptionBroker.requestSignalSpy.signalArguments[1][0], subscription.topic, "request signal should be emitted with the subscription topic")
+
+        subscriptionBroker.response(subscription.topic, "responseAsString2")
+        compare(subscription.response, "responseAsString2", "subscription response should be updated")
+
+        //second interval - check for one request every 50ms:
+        compare(subscriptionBroker.requestSignalSpy.count, 2, "request was emitted before 50ms interval")
+        tryCompare(subscriptionBroker.requestSignalSpy, "count", 3, 90 /*40ms error margin*/, "request signal should be emitted after 50ms")
+        compare(subscriptionBroker.requestSignalSpy.signalArguments[2][0], subscription.topic, "request signal should be emitted with the subscription topic")
+        subscriptionBroker.response(subscription.topic, "responseAsString3")
+
+        //Verify the request is not sent again after unsubscribe
+        subscriptionBroker.unsubscribe(subscription.subscriptionId)
+        compare(subscriptionBroker.subscribedSignalSpy.count, 1, "subscribed signal should not be emitted for unsunbscribe")
+        compare(subscriptionBroker.unsubscribedSignalSpy.count, 1, "unsubscribed signal should be emitted")
+        compare(subscriptionBroker.unsubscribedSignalSpy.signalArguments[0][0], subscription.subscriptionId, "unsubscribed signal should be emitted with the subscription id")
+        compare(subscriptionBroker.requestSignalSpy.count, 3, "request signal should not be emitted on unsubscribe")
+        wait(90)/*40ms error margin*/
+        compare(subscriptionBroker.requestSignalSpy.count, 3, "request signal should not be emitted again after unsubscribe")
+
+        //Verify the request is not sent again after disabling the broker
+        subscriptionBroker.subscribe(subscription)
+        compare(subscriptionBroker.subscribedSignalSpy.count, 2, "subscribed signal should be emitted")
+        compare(subscriptionBroker.requestSignalSpy.count, 4, "request signal should be emitted on subscribe")
+        subscriptionBroker.response(subscription.topic, "responseAsString4")
+        tryCompare(subscriptionBroker.requestSignalSpy, "count", 5, 90 /*40ms error margin*/, "request signal should be emitted")
+        subscriptionBroker.response(subscription.topic, "responseAsString5")
+
+        subscriptionBroker.active = false
+        compare(subscriptionBroker.requestSignalSpy.count, 5, "request signal should not be emitted after disabling the broker")
+        wait(90)/*40ms error margin*/
+        compare(subscriptionBroker.requestSignalSpy.count, 5, "request signal should not be emitted again after disabling the broker")
+
+        //Verify the request can be unsubsribed with a disabled broker
+        subscriptionBroker.unsubscribe(subscription.subscriptionId)
+        compare(subscriptionBroker.subscribedSignalSpy.count, 2, "subscribed signal should not be emitted for unsunbscribe")
+        compare(subscriptionBroker.unsubscribedSignalSpy.count, 2, "unsubscribed signal should be emitted")
+        compare(subscriptionBroker.unsubscribedSignalSpy.signalArguments[1][0], subscription.subscriptionId, "unsubscribed signal should be emitted with the subscription id")
+        compare(subscriptionBroker.requestSignalSpy.count, 5, "request signal should not be emitted on unsubscribe")
+
+        //Verify the request can be subscribed with a disabled broker
+        subscriptionBroker.subscribe(subscription)
+        compare(subscriptionBroker.subscribedSignalSpy.count, 3, "subscribed signal should be emitted")
+        compare(subscriptionBroker.requestSignalSpy.count, 5, "request signal should not be emitted on subscribe")
+        wait(90)/*40ms error margin*/
+        compare(subscriptionBroker.requestSignalSpy.count, 5, "request signal should not be emitted with a disabled broker")
+
+        //verify the request is sent after enabling the broker
+        subscriptionBroker.active = true
+        tryCompare(subscriptionBroker.requestSignalSpy, "count", 6, 1/*allow the event loop to be processed and the subscriptionBroker.active = true to be processed */, "request signal should be emitted after enabling the broker")
+    }
+
+    function test_periodic_request_multiple_subscriptions() {
+        const subscriptionBroker = createTemporaryObject(subscriptionBrokerComponent, testCase)
+        const subscription1 = createTemporaryObject(subscriptionComponent, testCase, {topic: "topic1", isReady: true, notificationInterval: 50}) //10 requests in 500ms
+        const subscription2 = createTemporaryObject(subscriptionComponent, testCase, {topic: "topic2", isReady: true, notificationInterval: 90}) //5 requests in 500ms
+        const subscription3 = createTemporaryObject(subscriptionComponent, testCase, {topic: "topic3", isReady: true, notificationInterval: 130}) //3 requests in 500ms
+        const subscription4 = createTemporaryObject(subscriptionComponent, testCase, {topic: "topic4", isReady: true, notificationInterval: 170}) //2 requests in 500ms
+        const subscription5 = createTemporaryObject(subscriptionComponent, testCase, {topic: "topic5", isReady: true, notificationInterval: 210}) //2 requests in 500ms
+                                                                                                                                                  //TOTAL: 22 requests in 500ms
+        var subscription1RequestTimestamp = 0
+        var subscription2RequestTimestamp = 0
+        var subscription3RequestTimestamp = 0
+        var subscription4RequestTimestamp = 0
+        var subscription5RequestTimestamp = 0
+
+        var requestCount = 0
+        subscriptionBroker.request.connect(function(topic) {
+            //sending a unique response for each request
+            subscriptionBroker.response(topic, "responseAsString" + Date.now())
+        })
+
+        //Enable broker and subscription
+        subscriptionBroker.active = true
+        subscriptionBroker.subscribe(subscription1)
+        subscriptionBroker.subscribe(subscription2)
+        subscriptionBroker.subscribe(subscription3)
+        subscriptionBroker.subscribe(subscription4)
+        subscriptionBroker.subscribe(subscription5)
+
+        //Make sure the interval difference between the subscriptions is at least 30ms
+        //This is to make sure interval computation deffects are not hidden by the error margin
+        //The usual error margin on Timer is < 10 ms. Setting it to 30 ms should be enough
+        const requestIntervalErrorMargin = 30
+
+        subscription1.responseChanged.connect(function() {
+            if(subscription1RequestTimestamp !== 0)
+                fuzzyCompare(Date.now() - subscription1RequestTimestamp, subscription1.notificationInterval, requestIntervalErrorMargin, "subscription1 request should be sent after notificationInterval")
+           
+            subscription1RequestTimestamp = Date.now()
+        })
+        subscription2.responseChanged.connect(function() {
+            if(subscription2RequestTimestamp !== 0)
+                fuzzyCompare(Date.now() - subscription2RequestTimestamp, subscription2.notificationInterval, requestIntervalErrorMargin, "subscription2 request should be sent after notificationInterval")
+
+            subscription2RequestTimestamp = Date.now()
+        })
+        subscription3.responseChanged.connect(function() {
+            if(subscription3RequestTimestamp !== 0)
+                fuzzyCompare(Date.now() - subscription3RequestTimestamp, subscription3.notificationInterval, requestIntervalErrorMargin, "subscription3 request should be sent after notificationInterval")
+
+            subscription3RequestTimestamp = Date.now()
+        })
+        subscription4.responseChanged.connect(function() {
+            if(subscription4RequestTimestamp !== 0)
+                fuzzyCompare(Date.now() - subscription4RequestTimestamp, subscription4.notificationInterval, requestIntervalErrorMargin, "subscription4 request should be sent after notificationInterval")
+
+            subscription4RequestTimestamp = Date.now()
+        })
+        subscription5.responseChanged.connect(function() {
+            if(subscription5RequestTimestamp !== 0)
+                fuzzyCompare(Date.now() - subscription5RequestTimestamp, subscription5.notificationInterval, requestIntervalErrorMargin, "subscription5 request should be sent after notificationInterval")
+
+            subscription5RequestTimestamp = Date.now()
+        })
+
+
+        ///Verify the request is sent periodically for 500 ms
+        ///The test is fuzzy because the timer is not precise
+        ///After each wait() the test error margin increases
+
+        //We should have 27 requests in 500ms. Adding an error margin of 100ms => 600ms total
+        tryVerify(() => subscriptionBroker.requestSignalSpy.count > 26, 600, "request signal should be emitted  more than 27 times. Actual: " + subscriptionBroker.requestSignalSpy.count)
+
+        //Disable one subscription and verify the request count is reduced
+        subscription5.isReady = false
+        subscription4.isReady = false
+
+        let previousRequestCount = subscriptionBroker.requestSignalSpy.count
+
+        //We should have 18 requests in 500ms. Adding an error margin of 100ms => 600ms total
+        tryVerify(() => subscriptionBroker.requestSignalSpy.count > previousRequestCount + 17/*fuzzy compare. Exact number should be 18*/, 600, "request signal should be emitted more than 14 times. Actual: " + subscriptionBroker.requestSignalSpy.count)
+
+        previousRequestCount = subscriptionBroker.requestSignalSpy.count
+
+        //Leave just one subscription and verify the request count is reduced
+        subscription3.isReady = false
+        subscription2.isReady = false
+
+        //We should have 10 requests in 500ms. Adding an error margin of 100ms => 600ms total
+        tryVerify(() => subscriptionBroker.requestSignalSpy.count > previousRequestCount + 9 /*fuzzy compare. Exact number should be 10*/, 600, "request signal should be emitted more than 8 times. Actual: " + subscriptionBroker.requestSignalSpy.count)
+    }
+
+    //Testing how the subscription broker handles the topic changes
+    function test_topic_changes() {
+        const subscriptionBroker = createTemporaryObject(subscriptionBrokerComponent, testCase)
+        const subscription1 = createTemporaryObject(subscriptionComponent, testCase, {topic: "topic1", isReady: true, notificationInterval: 50}) //10 requests in 500ms
+        const subscription2 = createTemporaryObject(subscriptionComponent, testCase, {topic: "topic2", isReady: true, notificationInterval: 90}) //5 requests in 500ms
+        const subscription3 = createTemporaryObject(subscriptionComponent, testCase, {topic: "topic3", isReady: true, notificationInterval: 130}) //3 requests in 500ms
+
+        subscriptionBroker.active = true
+        subscriptionBroker.subscribe(subscription1)
+        subscriptionBroker.subscribe(subscription2)
+        subscriptionBroker.subscribe(subscription3)
+
+        compare(subscriptionBroker.subscribedSignalSpy.count, 3, "subscribed signal should be emitted")
+
+        subscription1.topic = "topic1Changed"
+        compare(subscriptionBroker.requestSignalSpy.count, 4, "request signal should be emitted after changing the topic")
+    }
+}
+

ui/app/AppLayouts/Communities/helpers/BurnTokenFeesSubscriber.qml

@@ -0,0 +1,15 @@
+import QtQuick 2.15
+/*!
+    \qmltype BurnTokenFeesSubscriber
+    \inherits QtObject
+    \brief Helper object that holds the subscriber properties and the published properties for the fee computation.
+*/
+
+SingleFeeSubscriber {
+    id: root
+
+    required property string tokenKey
+    required property string amount
+    required property string accountAddress
+    required property bool enabled
+}

ui/app/AppLayouts/Communities/helpers/DeployFeesSubscriber.qml

@@ -0,0 +1,16 @@
+import QtQuick 2.15
+/*!
+    \qmltype DeployFeesSubscriber
+    \inherits QtObject
+    \brief Helper object that holds the subscriber properties and the published properties for the fee computation.
+*/
+
+SingleFeeSubscriber {
+    id: root
+
+    required property int chainId
+    required property int tokenType
+    required property bool isOwnerDeployment
+    required property string accountAddress
+    required property bool enabled
+}

ui/app/AppLayouts/Communities/helpers/SelfDestructFeesSubscriber.qml

@@ -0,0 +1,24 @@
+import QtQuick 2.15
+/*!
+    \qmltype SelfDestructFeesSubscriber
+    \inherits QtObject
+    \brief Helper object that holds the subscriber properties and the published properties for the fee computation.
+*/
+
+SingleFeeSubscriber {
+    id: root
+
+    required property string tokenKey
+    /**
+    * walletsAndAmounts - array of following structure is expected:
+    * [
+    *   {
+    *      walletAddress: string
+    *      amount: int
+    *   }
+    * ]
+    */
+    required property var walletsAndAmounts
+    required property string accountAddress
+    required property bool enabled
+}

ui/app/AppLayouts/Communities/helpers/SingleFeeSubscriber.qml

@@ -0,0 +1,39 @@
+import QtQuick 2.15
+
+import StatusQ.Core 0.1
+import utils 1.0
+
+/*!
+    \qmltype SingleFeeSubscriber
+    \inherits QtObject
+    \brief Helper object that parses fees response and provides fee text and error text for single fee respnse
+*/
+
+ QtObject {
+    id: root
+    // Published properties
+    property var feesResponse
+
+    // Internal properties based on response
+    readonly property string feeText: {
+        if (!feesResponse || !Object.values(feesResponse.ethCurrency).length || !Object.values(feesResponse.fiatCurrency).length)  return ""
+        
+        if (feesResponse.errorCode !== Constants.ComputeFeeErrorCode.Success && feesResponse.errorCode !== Constants.ComputeFeeErrorCode.Balance)
+            return ""
+
+        return LocaleUtils.currencyAmountToLocaleString(feesResponse.ethCurrency)
+                + " (" + LocaleUtils.currencyAmountToLocaleString(feesResponse.fiatCurrency) + ")"
+    }
+    readonly property string feeErrorText: {
+        if (!feesResponse)  return ""
+        if (feesResponse.errorCode === Constants.ComputeFeeErrorCode.Success) return ""
+
+        if (feesResponse.errorCode === Constants.ComputeFeeErrorCode.Balance)
+            return qsTr("Not enough funds to make transaction")
+
+        if (feesResponse.errorCode === Constants.ComputeFeeErrorCode.Infura)
+            return qsTr("Infura error")
+
+        return qsTr("Unknown error")
+    }
+}

ui/app/AppLayouts/Communities/helpers/TransactionFeesBroker.qml

@@ -0,0 +1,190 @@
+import QtQuick 2.15
+
+import shared.stores 1.0
+import utils 1.0
+
+import StatusQ.Core.Utils 0.1
+
+QtObject {
+    id: root
+
+    enum FeeType {
+        Airdrop,
+        Deploy,
+        SelfDestruct,
+        Burn
+    }
+
+    property CommunityTokensStore communityTokensStore
+
+    property QtObject d: QtObject {
+        id: internal
+
+        component AirdropFeeSubscription: Subscription {
+            required property AirdropFeesSubscriber subscriber
+            readonly property var requestArgs: ({
+                type: TransactionFeesBroker.FeeType.Airdrop,
+                communityId: subscriber.communityId,
+                contractKeysAndAmounts: subscriber.contractKeysAndAmounts,
+                addressesToAirdrop: subscriber.addressesToAirdrop,
+                feeAccountAddress: subscriber.feeAccountAddress
+            })
+
+            isReady: !!subscriber.communityId &&
+                    !!subscriber.contractKeysAndAmounts &&
+                    !!subscriber.addressesToAirdrop &&
+                    !!subscriber.feeAccountAddress &&
+                    subscriber.contractKeysAndAmounts.length &&
+                    subscriber.addressesToAirdrop.length &&
+                    subscriber.enabled
+
+            topic: isReady ? JSON.stringify(requestArgs) : ""
+            onResponseChanged: subscriber.airdropFeesResponse = response
+        }
+
+        component DeployFeeSubscription: Subscription {
+            required property DeployFeesSubscriber subscriber
+            readonly property var requestArgs: ({
+                type: TransactionFeesBroker.FeeType.Deploy,
+                chainId: subscriber.chainId,
+                accountAddress: subscriber.accountAddress,
+                tokenType: subscriber.tokenType,
+                isOwnerDeployment: subscriber.isOwnerDeployment
+            })
+
+            isReady: !!subscriber.chainId && 
+                    !!subscriber.accountAddress && 
+                    !!subscriber.tokenType && 
+                    subscriber.enabled
+
+            topic: isReady ? JSON.stringify(requestArgs) : ""
+            onResponseChanged: subscriber.feesResponse = response
+        }
+
+        component SelfDestructFeeSubscription: Subscription {
+            required property SelfDestructFeesSubscriber subscriber
+            readonly property var requestArgs: ({
+                type: TransactionFeesBroker.FeeType.SelfDestruct,
+                walletsAndAmounts:subscriber.walletsAndAmounts,
+                tokenKey: subscriber.tokenKey,
+                accountAddress: subscriber.accountAddress,
+            })
+            isReady: !!subscriber.walletsAndAmounts && 
+                    !!subscriber.tokenKey && 
+                    !!subscriber.accountAddress && 
+                    subscriber.walletsAndAmounts.length &&
+                    subscriber.enabled
+
+            topic: isReady ? JSON.stringify(requestArgs) : ""
+            onResponseChanged: subscriber.feesResponse = response
+        }
+
+        component BurnTokenFeeSubscription: Subscription {
+            required property BurnTokenFeesSubscriber subscriber
+            readonly property var requestArgs: ({
+                type: TransactionFeesBroker.FeeType.Burn,
+                tokenKey: subscriber.tokenKey,
+                amount: subscriber.amount,
+                accountAddress: subscriber.accountAddress
+            })
+            isReady: !!subscriber.tokenKey && 
+                    !!subscriber.amount && 
+                    !!subscriber.accountAddress &&
+                    subscriber.enabled
+
+            topic: isReady ? JSON.stringify(requestArgs) : ""
+            onResponseChanged: subscriber.feesResponse = response
+        }
+
+        readonly property Component airdropFeeSubscriptionComponent: AirdropFeeSubscription {}
+        readonly property Component deployFeeSubscriptionComponent: DeployFeeSubscription {}
+        readonly property Component selfDestructFeeSubscriptionComponent: SelfDestructFeeSubscription {}
+        readonly property Component burnFeeSubscriptionComponent: BurnTokenFeeSubscription {}
+
+        readonly property SubscriptionBroker feesBroker: SubscriptionBroker {
+            active: Global.applicationWindow.active
+            onRequest: internal.computeFee(topic)
+        }
+
+        property Connections communityTokensStoreConnections: Connections {
+            target: communityTokensStore
+
+            function onDeployFeeUpdated(ethCurrency, fiatCurrency, errorCode, responseId) {
+                d.feesBroker.response(responseId, { ethCurrency: ethCurrency, fiatCurrency: fiatCurrency, errorCode: errorCode })
+            }
+            function onAirdropFeeUpdated(response) {
+                d.feesBroker.response(response.requestId, response)
+            }
+
+            function onSelfDestructFeeUpdated(ethCurrency, fiatCurrency, errorCode, responseId) {
+                d.feesBroker.response(responseId, { ethCurrency: ethCurrency, fiatCurrency: fiatCurrency, errorCode: errorCode })
+            }
+
+            function onBurnFeeUpdated(ethCurrency, fiatCurrency, errorCode, responseId) {
+                d.feesBroker.response(responseId, { ethCurrency: ethCurrency, fiatCurrency: fiatCurrency, errorCode: errorCode })
+            }
+        }
+
+        function computeFee(topic) {
+            const args = JSON.parse(topic)
+            switch (args.type) {
+                case TransactionFeesBroker.FeeType.Airdrop:
+                    computeAirdropFee(args, topic)
+                    break
+                case TransactionFeesBroker.FeeType.Deploy:
+                    computeDeployFee(args, topic)
+                    break
+                case TransactionFeesBroker.FeeType.SelfDestruct:
+                    computeSelfDestructFee(args, topic)
+                    break
+                case TransactionFeesBroker.FeeType.Burn:
+                    computeBurnFee(args, topic)
+                    break
+                default:
+                    console.error("Unknown fee type: " + args.type)
+            }
+        }
+
+        function computeAirdropFee(args, topic) {            
+            communityTokensStore.computeAirdropFee(
+                        args.communityId,
+                        args.contractKeysAndAmounts,
+                        args.addressesToAirdrop,
+                        args.feeAccountAddress,
+                        topic)
+        }
+
+        function computeDeployFee(args, topic) {
+            communityTokensStore.computeDeployFee(args.chainId, args.accountAddress, args.tokenType, args.isOwnerDeployment, topic)
+        }
+
+        function computeSelfDestructFee(args, topic) {
+            communityTokensStore.computeSelfDestructFee(args.walletsAndAmounts, args.tokenKey, args.accountAddress, topic)
+        }
+
+        function computeBurnFee(args, topic) {
+            console.assert(typeof args.amount === "string")
+            communityTokensStore.computeBurnFee(args.tokenKey, args.amount, args.accountAddress, topic)
+        }
+    }
+
+    function registerAirdropFeesSubscriber(subscriberObj) {
+        const subscription = d.airdropFeeSubscriptionComponent.createObject(subscriberObj, { subscriber: subscriberObj })
+        d.feesBroker.subscribe(subscription)
+    }
+
+    function registerDeployFeesSubscriber(subscriberObj) {
+        const subscription = d.deployFeeSubscriptionComponent.createObject(subscriberObj, { subscriber: subscriberObj })
+        d.feesBroker.subscribe(subscription)
+    }
+
+    function registerSelfDestructFeesSubscriber(subscriberObj) {
+        const subscription = d.selfDestructFeeSubscriptionComponent.createObject(subscriberObj, { subscriber: subscriberObj })
+        d.feesBroker.subscribe(subscription)
+    }
+
+    function registerBurnFeesSubscriber(subscriberObj) {
+        const subscription = d.burnFeeSubscriptionComponent.createObject(subscriberObj, { subscriber: subscriberObj })
+        d.feesBroker.subscribe(subscription)
+    }
+}

ui/app/AppLayouts/Communities/helpers/qmldir

@@ -1,2 +1,8 @@
 singleton PermissionsHelpers 1.0 PermissionsHelpers.qml
+AirdropFeesSubscriber 1.0 AirdropFeesSubscriber.qml
+BurnTokenFeesSubscriber 1.0 BurnTokenFeesSubscriber.qml
+DeployFeesSubscriber 1.0 DeployFeesSubscriber.qml
+SelfDestructFeesSubscriber 1.0 SelfDestructFeesSubscriber.qml
+SingleFeeSubscriber 1.0 SingleFeeSubscriber.qml
 TokenObject 1.0 TokenObject.qml
+TransactionFeesBroker 1.0 TransactionFeesBroker.qml

ui/app/AppLayouts/Communities/panels/AirdropsSettingsPanel.qml

@@ -20,7 +20,6 @@ StackView {
     required property bool isTokenMasterOwner
     required property bool isAdmin
     readonly property bool isPrivilegedTokenOwnerProfile: root.isOwner || root.isTokenMasterOwner
-    readonly property alias airdropFeesSubscriber: d.aidropFeeSubscriber
 
     // Owner and TMaster token related properties:
     readonly property bool arePrivilegedTokensDeployed: root.isOwnerTokenDeployed && root.isTMasterTokenDeployed
@@ -38,8 +37,8 @@ StackView {
     property string previousPageName: depth > 1 ? qsTr("Airdrops") : ""
 
     signal airdropClicked(var airdropTokens, var addresses, string feeAccountAddress)
-    signal airdropFeesRequested(var contractKeysAndAmounts, var addresses, string feeAccountAddress)
     signal navigateToMintTokenSettings(bool isAssetType)
+    signal registerAirdropFeeSubscriber(var feeSubscriber)
 
     function navigateBack() {
         pop(StackView.Immediate)
@@ -132,7 +131,6 @@ StackView {
                 Component.onCompleted: {
                     d.selectToken.connect(view.selectToken)
                     d.addAddresses.connect(view.addAddresses)
-                    d.aidropFeeSubscriber = feesSubscriber
                 }
 
                 AirdropFeesSubscriber {
@@ -142,6 +140,7 @@ StackView {
                     contractKeysAndAmounts: view.selectedContractKeysAndAmounts
                     addressesToAirdrop: view.selectedAddressesToAirdrop
                     feeAccountAddress: view.selectedFeeAccount
+                    Component.onCompleted: root.registerAirdropFeeSubscriber(feesSubscriber)
                 }
             }
         }

ui/app/AppLayouts/Communities/panels/MintTokensSettingsPanel.qml

@@ -50,11 +50,6 @@ StackView {
     property var tokensModelWallet
     property var accounts // Expected roles: address, name, color, emoji, walletType
 
-    // Transaction related properties:
-    property string feeText
-    property string feeErrorText
-    property bool isFeeLoading: true
-
     // Network related properties:
     property var layer1Networks
     property var layer2Networks
@@ -67,25 +62,15 @@ StackView {
 
     signal kickUserRequested(string contactId)
     signal banUserRequested(string contactId)
-
-    signal deployFeesRequested(int chainId, string accountAddress, int tokenType)
-    signal burnFeesRequested(string tokenKey, string amount, string accountAddress)
-    signal remotelyDestructFeesRequest(var walletsAndAmounts, // { [walletAddress (string), amount (int)] }
-                                       string tokenKey,
-                                       string accountAddress)
     signal remotelyDestructCollectibles(var walletsAndAmounts, // { [walletAddress (string), amount (int)] }
                                         string tokenKey,
                                         string accountAddress)
-    signal signBurnTransactionOpened(string tokenKey, string amount, string accountAddress)
     signal burnToken(string tokenKey, string amount, string accountAddress)
     signal airdropToken(string tokenKey, string amount, int type, var addresses)
     signal deleteToken(string tokenKey)
-
+    signal registerDeployFeesSubscriber(var feeSubscriber)
-    function setFeeLoading() {
+    signal registerSelfDestructFeesSubscriber(var feeSubscriber)
-        root.isFeeLoading = true
+    signal registerBurnTokenFeesSubscriber(var feeSubscriber)
-        root.feeText = ""
-        root.feeErrorText = ""
-    }
 
     function navigateBack() {
         pop(StackView.Immediate)
@@ -138,7 +123,6 @@ StackView {
             root.push(ownerTokenEditViewComponent, properties,
                       StackView.Immediate)
         }
-
     }
 
     initialItem: SettingsPage {
@@ -243,31 +227,36 @@ StackView {
                 allNetworks: root.allNetworks
                 accounts: root.accounts
 
+                feeText: feeSubscriber.feeText
+                feeErrorText: feeSubscriber.feeErrorText
+                isFeeLoading: !feeSubscriber.feesResponse
+
                 onMintClicked: signMintPopup.open()
                 
-                onDeployFeesRequested: root.deployFeesRequested(
+                DeployFeesSubscriber {
-                                           ownerToken.chainId,
+                    id: feeSubscriber
-                                           ownerToken.accountAddress,
+                    chainId: editOwnerTokenView.ownerToken.chainId
-                                           Constants.TokenType.ERC721)
+                    tokenType: editOwnerTokenView.ownerToken.type
-
+                    isOwnerDeployment: editOwnerTokenView.ownerToken.isPrivilegedToken
-                feeText: root.feeText
+                    accountAddress: editOwnerTokenView.ownerToken.accountAddress
-                feeErrorText: root.feeErrorText
+                    enabled: editOwnerTokenView.visible || signMintPopup.visible
-                isFeeLoading: root.isFeeLoading
+                    Component.onCompleted: root.registerDeployFeesSubscriber(feeSubscriber)
+                }
 
                 SignMultiTokenTransactionsPopup {
                     id: signMintPopup
 
                     title: qsTr("Sign transaction - Mint %1 tokens").arg(
                                editOwnerTokenView.communityName)
-                    totalFeeText: root.isFeeLoading ?
+                    totalFeeText: editOwnerTokenView.isFeeLoading ?
-                                      "" : root.feeText
+                                      "" : editOwnerTokenView.feeText
-                    errorText: root.feeErrorText
+                    errorText: editOwnerTokenView.feeErrorText
                     accountName: editOwnerTokenView.ownerToken.accountName
 
                     model: QtObject {
                         readonly property string title: editOwnerTokenView.feeLabel
                         readonly property string feeText: signMintPopup.totalFeeText
-                        readonly property bool error: root.feeErrorText !== ""
+                        readonly property bool error: editOwnerTokenView.feeErrorText !== ""
                     }
 
                     onSignTransactionClicked: editOwnerTokenView.signMintTransaction()
@@ -335,7 +324,7 @@ StackView {
                         validationMode: !newTokenPage.isAssetView
                                         ? newTokenPage.validationMode
                                         : StatusInput.ValidationMode.OnlyWhenDirty
-                        collectible: newTokenPage.collectible
+                        token: newTokenPage.collectible
                     }
 
                     CustomEditCommunityTokenView {
@@ -345,10 +334,12 @@ StackView {
                         validationMode: newTokenPage.isAssetView
                                         ? newTokenPage.validationMode
                                         : StatusInput.ValidationMode.OnlyWhenDirty
-                        asset: newTokenPage.asset
+                        token: newTokenPage.asset
                     }
 
                     component CustomEditCommunityTokenView: EditCommunityTokenView {
+                        id: editView
+
                         viewWidth: root.viewWidth
                         layer1Networks: root.layer1Networks
                         layer2Networks: root.layer2Networks
@@ -361,28 +352,27 @@ StackView {
                         referenceName: newTokenPage.referenceName
                         referenceSymbol: newTokenPage.referenceSymbol
 
-                        feeText: root.feeText
+                        feeText: deployFeeSubscriber.feeText
-                        feeErrorText: root.feeErrorText
+                        feeErrorText: deployFeeSubscriber.feeErrorText
-                        isFeeLoading: root.isFeeLoading
+                        isFeeLoading: !deployFeeSubscriber.feesResponse
 
                         onPreviewClicked: {
                             const properties = {
-                                token: isAssetView ? asset : collectible
+                                token: token
                             }
 
                             root.push(previewTokenViewComponent, properties,
                                       StackView.Immediate)
                         }
 
-                        onDeployFeesRequested: {
+                        DeployFeesSubscriber {
-                            if (isAssetView)
+                            id: deployFeeSubscriber
-                                root.deployFeesRequested(asset.chainId,
+                            chainId: editView.token.chainId
-                                                         asset.accountAddress,
+                            tokenType: editView.token.type
-                                                         Constants.TokenType.ERC20)
+                            isOwnerDeployment: editView.token.isPrivilegedToken
-                            else
+                            accountAddress: editView.token.accountAddress
-                                root.deployFeesRequested(collectible.chainId,
+                            enabled: editView.visible
-                                                         collectible.accountAddress,
+                            Component.onCompleted: root.registerDeployFeesSubscriber(deployFeeSubscriber)
-                                                         Constants.TokenType.ERC721)
                         }
                     }
                 }
@@ -407,20 +397,14 @@ StackView {
                 viewWidth: root.viewWidth
                 preview: true
 
-                feeText: root.feeText
-                feeErrorText: root.feeErrorText
-                isFeeLoading: root.isFeeLoading
                 accounts: root.accounts
-
+                feeText: feeSubscriber.feeText
-                onDeployFeesRequested: root.deployFeesRequested(
+                feeErrorText: feeSubscriber.feeErrorText
-                                           token.chainId, token.accountAddress,
+                isFeeLoading: !feeSubscriber.feesResponse
-                                           token.type)
 
                 onMintClicked: signMintPopup.open()
 
                 function signMintTransaction() {
-                    root.setFeeLoading()
-
                     if(preview.isAssetView)
                         root.mintAsset(token)
                     else
@@ -429,18 +413,28 @@ StackView {
                     root.resetNavigation()
                 }
 
+                DeployFeesSubscriber {
+                    id: feeSubscriber
+                    chainId: preview.token.chainId
+                    tokenType: preview.token.type
+                    isOwnerDeployment: preview.token.isPrivilegedToken
+                    accountAddress: preview.token.accountAddress
+                    enabled: preview.visible || signMintPopup.visible
+                    Component.onCompleted: root.registerDeployFeesSubscriber(feeSubscriber)
+                }
+
                 SignMultiTokenTransactionsPopup {
                     id: signMintPopup
 
                     title: qsTr("Sign transaction - Mint %1 token").arg(
                                preview.token.name)
-                    totalFeeText: root.isFeeLoading ? "" : root.feeText
+                    totalFeeText: preview.isFeeLoading ? "" : preview.feeText
                     accountName: preview.token.accountName
 
                     model: QtObject {
                         readonly property string title: preview.feeLabel
                         readonly property string feeText: signMintPopup.totalFeeText
-                        readonly property bool error: root.feeErrorText !== ""
+                        readonly property bool error: preview.feeErrorText !== ""
                     }
 
                     onSignTransactionClicked: preview.signMintTransaction()
@@ -452,12 +446,11 @@ StackView {
     component TokenViewPage: SettingsPage {
         id: tokenViewPage
 
-        readonly property alias token: view.token
+        property TokenObject token: TokenObject {}
         readonly property bool deploymentFailed: view.deployState === Constants.ContractTransactionStatus.Failed
 
-        property alias tokenOwnersModel: view.tokenOwnersModel
+        property var tokenOwnersModel
-        property alias airdropKey: view.airdropKey
+        property string airdropKey
-
         // Owner and TMaster related props
         readonly property bool isPrivilegedTokenItem: isOwnerTokenItem || isTMasterTokenItem
         readonly property bool isOwnerTokenItem: token.privilegesLevel === Constants.TokenPrivilegesLevel.Owner
@@ -517,11 +510,12 @@ StackView {
         contentItem: CommunityTokenView {
             id: view
 
-            property string airdropKey // TO REMOVE: Temporal property until airdrop backend is not ready to use token key instead of symbol
+            property string airdropKey: tokenViewPage.airdropKey // TO REMOVE: Temporal property until airdrop backend is not ready to use token key instead of symbol
 
             viewWidth: root.viewWidth
 
-            token: TokenObject {}
+            token: tokenViewPage.token
+            tokenOwnersModel: tokenViewPage.tokenOwnersModel
 
             onGeneralAirdropRequested: {
                 root.airdropToken(view.airdropKey,
@@ -538,7 +532,7 @@ StackView {
             onRemoteDestructRequested: {
                 if (token.isPrivilegedToken) {
                     tokenMasterActionPopup.openPopup(
-                                TokenMasterActionPopup.ActionType.RemotelyDestruct, name)
+                                TokenMasterActionPopup.ActionType.RemotelyDestruct, name, address)
                 } else {
                     remotelyDestructPopup.open()
                     // TODO: set the address selected in the popup's list
@@ -572,16 +566,34 @@ StackView {
             TokenMasterActionPopup {
                 id: tokenMasterActionPopup
 
+                property string address: ""
+
                 communityName: root.communityName
                 networkName: view.token.chainName
 
                 accountsModel: root.accounts
+                feeText: selfDestructFeesSubscriber.feeText
+                feeErrorText: selfDestructFeesSubscriber.feeErrorText
+                isFeeLoading: !selfDestructFeesSubscriber.feesResponse
 
-                function openPopup(type, userName) {
+                function openPopup(type, userName, address) {
                     tokenMasterActionPopup.actionType = type
                     tokenMasterActionPopup.userName = userName
+                    tokenMasterActionPopup.address = address
                     open()
                 }
+
+                SelfDestructFeesSubscriber {
+                    id: selfDestructFeesSubscriber
+                    walletsAndAmounts: [{ 
+                        walletAddress: tokenMasterActionPopup.address, 
+                        amount: 1 
+                    }]
+                    accountAddress: tokenMasterActionPopup.selectedAccount
+                    tokenKey: view.token.key
+                    enabled: tokenMasterActionPopup.opened
+                    Component.onCompleted: root.registerSelfDestructFeesSubscriber(selfDestructFeesSubscriber)
+                }
             }
 
             KickBanPopup {
@@ -661,20 +673,16 @@ StackView {
             RemotelyDestructPopup {
                 id: remotelyDestructPopup
 
+                property alias feeSubscriber: remotelyDestructFeeSubscriber
+
                 collectibleName: view.token.name
                 model: view.tokenOwnersModel || null
                 accounts: root.accounts
                 chainName: view.token.chainName   
 
-                feeText: root.feeText                
+                feeText: remotelyDestructFeeSubscriber.feeText
-                isFeeLoading: root.isFeeLoading
+                feeErrorText: remotelyDestructFeeSubscriber.feeErrorText
-                feeErrorText: root.feeErrorText
+                isFeeLoading: !remotelyDestructFeeSubscriber.feesResponse          
-
-                onRemotelyDestructFeesRequested: {
-                    root.remotelyDestructFeesRequest(walletsAndAmounts,
-                                                     view.token.key,
-                                                     accountAddress)
-                }
                 
                 onRemotelyDestructClicked: {
                     remotelyDestructPopup.close()
@@ -682,6 +690,15 @@ StackView {
                     footer.walletsAndAmounts = walletsAndAmounts
                     alertPopup.open()
                 }
+
+                SelfDestructFeesSubscriber {
+                    id: remotelyDestructFeeSubscriber
+                    walletsAndAmounts: remotelyDestructPopup.selectedWalletsAndAmounts
+                    accountAddress: remotelyDestructPopup.selectedAccount
+                    tokenKey: view.token.key
+                    enabled: remotelyDestructPopup.tokenCount > 0 && accountAddress !== "" && (remotelyDestructPopup.opened || signTransactionPopup.opened)
+                    Component.onCompleted: root.registerSelfDestructFeesSubscriber(remotelyDestructFeeSubscriber)
+                }
             }
 
             AlertPopup {
@@ -702,11 +719,13 @@ StackView {
                 id: signTransactionPopup
 
                 property bool isRemotelyDestructTransaction
+                property var feeSubscriber: isRemotelyDestructTransaction
+                                             ? remotelyDestructPopup.feeSubscriber
+                                             : burnTokensPopup.feeSubscriber
+
                 readonly property string tokenKey: tokenViewPage.token.key
 
                 function signTransaction() {
-                    root.setFeeLoading()
-
                     if(signTransactionPopup.isRemotelyDestructTransaction)
                         root.remotelyDestructCollectibles(footer.walletsAndAmounts,
                                                           tokenKey, footer.accountAddress)
@@ -723,23 +742,17 @@ StackView {
                 tokenName: footer.token.name
                 accountName: footer.token.accountName
                 networkName: footer.token.chainName
-                feeText: root.feeText
+                feeText: feeSubscriber.feeText
-                isFeeLoading: root.isFeeLoading
+                isFeeLoading: feeSubscriber.feeText === "" && feeSubscriber.feeErrorText === ""
-                errorText: root.feeErrorText
+                errorText: feeSubscriber.feeErrorText
 
-                onOpened: {
-                    root.setFeeLoading()
-
-                    signTransactionPopup.isRemotelyDestructTransaction
-                            ? root.remotelyDestructFeesRequest(footer.walletsAndAmounts, tokenKey, footer.accountAddress)
-                            : root.signBurnTransactionOpened(tokenKey, footer.burnAmount, footer.accountAddress)
-                }
                 onSignTransactionClicked: signTransaction()
             }
 
             BurnTokensPopup {
                 id: burnTokensPopup
                 
+                property alias feeSubscriber: burnTokensFeeSubscriber
                 communityName: root.communityName
                 tokenName: footer.token.name
                 remainingTokens: footer.token.remainingTokens
@@ -747,12 +760,12 @@ StackView {
                 tokenSource: footer.token.artworkSource
                 chainName: footer.token.chainName
                 
-                feeText: root.feeText
+                onAmountToBurnChanged: burnTokensFeeSubscriber.updateAmount()
-                feeErrorText: root.feeErrorText
-                isFeeLoading: root.isFeeLoading
-                accounts: root.accounts
 
-                onBurnFeesRequested: root.burnFeesRequested(footer.token.key, burnAmount, accountAddress)
+                feeText: burnTokensFeeSubscriber.feeText
+                feeErrorText: burnTokensFeeSubscriber.feeErrorText
+                isFeeLoading: burnTokensFeeSubscriber.feeText === "" && burnTokensFeeSubscriber.feeErrorText === ""
+                accounts: root.accounts
 
                 onBurnClicked: {
                     burnTokensPopup.close()
@@ -761,13 +774,25 @@ StackView {
                     signTransactionPopup.isRemotelyDestructTransaction = false
                     signTransactionPopup.open()
                 }
+
+                BurnTokenFeesSubscriber {
+                    id: burnTokensFeeSubscriber
+                    readonly property var updateAmount: Backpressure.debounce(burnTokensFeeSubscriber, 500, () => {
+                        burnTokensFeeSubscriber.amount = burnTokensPopup.amountToBurn
+                    })
+                    amount: ""
+                    tokenKey: tokenViewPage.token.key
+                    accountAddress: burnTokensPopup.selectedAccountAddress
+                    enabled: burnTokensPopup.visible || signTransactionPopup.visible
+                    Component.onCompleted: root.registerBurnTokenFeesSubscriber(burnTokensFeeSubscriber)
+                }
             }
         }
 
         AlertPopup {
             id: deleteTokenAlertPopup
 
-            readonly property alias tokenName: view.token.name
+            readonly property string tokenName: view.token.name
 
             width: 521
             title: qsTr("Delete %1").arg(tokenName)
@@ -799,6 +824,7 @@ StackView {
                 }
 
                 delegate: TokenViewPage {
+                    required property var model
                     implicitWidth: 0
                     anchors.fill: parent
 

ui/app/AppLayouts/Communities/popups/BurnTokensPopup.qml

@@ -27,6 +27,9 @@ StatusDialog {
     property url tokenSource
     property string chainName
 
+    readonly property alias amountToBurn: d.amountToBurn
+    readonly property alias selectedAccountAddress: d.accountAddress
+    
     // Fees related properties:
     property string feeText
     property string feeErrorText: ""
@@ -38,7 +41,6 @@ StatusDialog {
 
     signal burnClicked(string burnAmount, string accountAddress)
     signal cancelClicked
-    signal burnFeesRequested(string burnAmount, string accountAddress)
 
     QtObject {
         id: d
@@ -51,6 +53,8 @@ StatusDialog {
             LocaleUtils.numberToLocaleString(remainingTokensFloat)
 
         property string accountAddress
+        property string amountToBurn: !isFormValid ? "" :
+                                        specificAmountButton.checked ? amountInput.amount : root.remainingTokens
 
         readonly property bool isFeeError: root.feeErrorText !== ""
 
@@ -119,7 +123,7 @@ StatusDialog {
                     font.pixelSize: Style.current.primaryTextFontSize
                     ButtonGroup.group: radioGroup
 
-                    onToggled: if(checked) amountToBurnInput.forceActiveFocus()
+                    onToggled: if(checked) amountInput.forceActiveFocus()
                 }
 
                 AmountInput {
@@ -164,18 +168,6 @@ StatusDialog {
 
         FeesBox {
             id: feesBox
-
-            readonly property bool triggerFeeReevaluation: {
-                specificAmountButton.checked
-                amountInput.amount
-                feesBox.accountsSelector.currentIndex
-
-                if (root.opened)
-                    requestFeeDelayTimer.restart()
-
-                return true
-            }
-
             Layout.fillWidth: true
 
             placeholderText: qsTr("Choose number of tokens to burn to see gas fees")
@@ -195,24 +187,6 @@ StatusDialog {
                 d.accountAddress = item.address
             }
 
-            Timer {
-                id: requestFeeDelayTimer
-
-                interval: 500
-                onTriggered: {
-                    if (specificAmountButton.checked) {
-                        if (!amountInput.valid)
-                            return
-
-                        root.burnFeesRequested(amountInput.amount,
-                                               d.accountAddress)
-                    } else {
-                        root.burnFeesRequested(root.remainingTokens,
-                                               d.accountAddress)
-                    }
-                }
-            }
-
             QtObject {
                 id: singleFeeModel
 

ui/app/AppLayouts/Communities/popups/RemotelyDestructPopup.qml

@@ -27,11 +27,17 @@ StatusDialog {
     property string feeLabel: qsTr("Remotely destruct %1 token on %2").arg(root.collectibleName).arg(root.chainName)
 
     readonly property alias tokenCount: d.tokenCount
+    readonly property string selectedAccount: d.accountAddress
+    readonly property var selectedWalletsAndAmounts: {
+        //depedency
+        d.tokenCount
+        return ModelUtils.modelToArray(d.walletsAndAmountsList)
+    }
 
     // Account expected roles: address, name, color, emoji, walletType
     property var accounts
+
     signal remotelyDestructClicked(var walletsAndAmounts, string accountAddress)
-    signal remotelyDestructFeesRequested(var walletsAndAmounts, string accountAddress)
 
     QtObject {
         id: d
@@ -74,17 +80,6 @@ StatusDialog {
                               d.walletsAndAmountsList, "amount")
             const sum = amounts.reduce((a, b) => a + b, 0)
             d.tokenCount = sum
-
-            if (sum > 0)
-                sendFeeRequest()
-        }
-
-        function sendFeeRequest() {
-            const walletsAndAmounts = ModelUtils.modelToArray(
-                                        d.walletsAndAmountsList)
-
-            root.remotelyDestructFeesRequested(walletsAndAmounts,
-                                               d.accountAddress)
         }
     }
 
@@ -126,10 +121,6 @@ StatusDialog {
                 const item = ModelUtils.get(accountsSelector.model,
                                             accountsSelector.currentIndex)
                 d.accountAddress = item.address
-
-                // Whenever a change in the form happens, new fee calculation:
-                if (d.tokenCount > 0)
-                    d.sendFeeRequest()
             }
 
             QtObject {

ui/app/AppLayouts/Communities/popups/TokenMasterActionPopup.qml

@@ -7,6 +7,7 @@ import StatusQ.Core 0.1
 import StatusQ.Controls 0.1
 import StatusQ.Popups.Dialog 0.1
 import StatusQ.Core.Theme 0.1
+import StatusQ.Core.Utils 0.1
 
 import AppLayouts.Communities.panels 1.0
 
@@ -40,7 +41,10 @@ StatusDialog {
     property string feeText
     property string feeErrorText
     property bool isFeeLoading
+
+
     property var accountsModel
+    readonly property alias selectedAccount: d.accountAddress
 
     readonly property string feeLabel: qsTr("Remotely destruct 1 TokenMaster token on %1").arg(
                                            root.networkName)
@@ -140,9 +144,18 @@ StatusDialog {
 
                 readonly property string title: root.feeLabel
                 readonly property string feeText: root.isFeeLoading ?
-                                                      "" : root.feeText
+                                                  "" : root.feeText
                 readonly property bool error: root.feeErrorText !== ""
             }
+
+            accountsSelector.onCurrentIndexChanged: {
+                if (accountsSelector.currentIndex < 0)
+                    return
+
+                const item = ModelUtils.get(accountsSelector.model,
+                                            accountsSelector.currentIndex)
+                d.accountAddress = item.address
+            }
         }
     }
 
@@ -156,7 +169,6 @@ StatusDialog {
             }
             StatusButton {
                 enabled: !root.isFeeLoading && root.feeErrorText === ""
-                         && root.feeText !== ""
                 text: {
                     if (root.actionType === TokenMasterActionPopup.ActionType.Ban)
                         return qsTr("Ban %1 and remotely destruct 1 token").arg(root.userName)
@@ -179,4 +191,10 @@ StatusDialog {
             }
         }
     }
+
+    QtObject {
+        id: d
+
+        property string accountAddress: ""
+    }
 }

ui/app/AppLayouts/Communities/views/CommunitySettingsView.qml

@@ -309,29 +309,6 @@ StatusSectionLayout {
             readonly property CommunityTokensStore communityTokensStore:
                 rootStore.communityTokensStore
 
-            function setFeesInfo(ethCurrency, fiatCurrency, errorCode) {
-                if (errorCode === Constants.ComputeFeeErrorCode.Success
-                        || errorCode === Constants.ComputeFeeErrorCode.Balance) {
-
-                    const valueStr = LocaleUtils.currencyAmountToLocaleString(ethCurrency)
-                        + "(" + LocaleUtils.currencyAmountToLocaleString(fiatCurrency) + ")"
-                    mintPanel.feeText = valueStr
-
-                    if (errorCode === Constants.ComputeFeeErrorCode.Balance)
-                        mintPanel.feeErrorText = qsTr("Not enough funds to make transaction")
-
-                    mintPanel.isFeeLoading = false
-
-                    return
-                } else if (errorCode === Constants.ComputeFeeErrorCode.Infura) {
-                    mintPanel.feeErrorText = qsTr("Infura error")
-                    mintPanel.isFeeLoading = true
-                    return
-                }
-                mintPanel.feeErrorText = qsTr("Unknown error")
-                mintPanel.isFeeLoading = true
-            }
-
             // General community props
             communityName: root.community.name
             communityLogo: root.community.image
@@ -356,22 +333,11 @@ StatusSectionLayout {
             allNetworks: communityTokensStore.allNetworks
             accounts: root.walletAccountsModel
 
-            onDeployFeesRequested: {
+            onRegisterDeployFeesSubscriber: d.feesBroker.registerDeployFeesSubscriber(feeSubscriber)
-                feeText = ""
-                feeErrorText = ""
-                isFeeLoading = true
 
-                communityTokensStore.computeDeployFee(
+            onRegisterSelfDestructFeesSubscriber: d.feesBroker.registerSelfDestructFeesSubscriber(feeSubscriber)
-                    chainId, accountAddress, tokenType, !(mintPanel.isOwnerTokenDeployed && mintPanel.isTMasterTokenDeployed))
-            }
 
-            onBurnFeesRequested: {
+            onRegisterBurnTokenFeesSubscriber: d.feesBroker.registerBurnFeesSubscriber(feeSubscriber)
-                feeText = ""
-                feeErrorText = ""
-                isFeeLoading = true
-
-                communityTokensStore.computeBurnFee(tokenKey, amount, accountAddress)
-            }
 
             onMintCollectible:
                 communityTokensStore.deployCollectible(
@@ -384,17 +350,10 @@ StatusSectionLayout {
                 communityTokensStore.deployOwnerToken(
                     root.community.id, ownerToken, tMasterToken)
 
-            onRemotelyDestructFeesRequest:
-                communityTokensStore.computeSelfDestructFee(
-                    walletsAndAmounts, tokenKey, accountAddress)
-
             onRemotelyDestructCollectibles:
                 communityTokensStore.remoteSelfDestructCollectibles(
                     root.community.id, walletsAndAmounts, tokenKey, accountAddress)
 
-            onSignBurnTransactionOpened:
-                communityTokensStore.computeBurnFee(tokenKey, amount, accountAddress)
-
             onBurnToken:
                 communityTokensStore.burnToken(root.community.id, tokenKey, amount, accountAddress)
 
@@ -524,20 +483,16 @@ StatusSectionLayout {
             membersModel: community.members
 
             accountsModel: root.walletAccountsModel
-
             onAirdropClicked: communityTokensStore.airdrop(
-                                  root.community.id, airdropTokens, addresses,
+                                   root.community.id, airdropTokens, addresses,
-                                  feeAccountAddress)
+                                   feeAccountAddress)
                                    
             onNavigateToMintTokenSettings: {
                 root.goTo(Constants.CommunitySettingsSections.MintTokens)
                 mintPanel.openNewTokenForm(isAssetType)
             }
 
-            onAirdropFeesRequested:
+            onRegisterAirdropFeeSubscriber: d.feesBroker.registerAirdropFeesSubscriber(feeSubscriber)
-                communityTokensStore.computeAirdropFee(
-                    root.community.id, contractKeysAndAmounts, addresses,
-                    feeAccountAddress)
         }
     }
 
@@ -556,6 +511,10 @@ StatusSectionLayout {
             readonly property bool tokenMaster: root.community.memberRole === Constants.memberRole.tokenMaster
         }
 
+        readonly property TransactionFeesBroker feesBroker: TransactionFeesBroker {
+            communityTokensStore: root.rootStore.communityTokensStore
+        }
+
         function goTo(section: int, subSection: int) {
             const stackContent = stackLayout.children
 
@@ -705,22 +664,6 @@ StatusSectionLayout {
     Connections {
         target: rootStore.communityTokensStore
 
-        function onDeployFeeUpdated(ethCurrency, fiatCurrency, errorCode) {
-            mintPanel.setFeesInfo(ethCurrency, fiatCurrency, errorCode)
-        }
-
-        function onSelfDestructFeeUpdated(ethCurrency, fiatCurrency, errorCode) {
-            mintPanel.setFeesInfo(ethCurrency, fiatCurrency, errorCode)
-        }
-
-        function onBurnFeeUpdated(ethCurrency, fiatCurrency, errorCode) {
-            mintPanel.setFeesInfo(ethCurrency, fiatCurrency, errorCode)
-        }
-
-        function onAirdropFeeUpdated(airdropFees) {
-            airdropPanel.airdropFees = airdropFees
-        }
-
         function onRemoteDestructStateChanged(communityId, tokenName, status, url) {
             if (root.community.id !== communityId)
                 return

ui/app/AppLayouts/Communities/views/CommunityTokenView.qml

@@ -24,6 +24,10 @@ StatusScrollView {
 
     // https://bugreports.qt.io/browse/QTBUG-84269
     /* required */ property TokenObject token
+    /* required */ property string feeText
+    /* required */ property string feeErrorText
+    /* required */ property bool isFeeLoading
+
 
     readonly property bool isAssetView: token.type === Constants.TokenType.ERC20
 
@@ -58,10 +62,6 @@ StatusScrollView {
 
     // Required for preview mode:
     property var accounts
-    property string feeText
-    property string feeErrorText
-    property bool isFeeLoading
-
     signal mintClicked()
 
     signal airdropRequested(string address)
@@ -74,8 +74,6 @@ StatusScrollView {
     signal kickRequested(string name, string contactId)
     signal banRequested(string name, string contactId)
 
-    signal deployFeesRequested
-
     QtObject {
         id: d
 
@@ -179,8 +177,6 @@ StatusScrollView {
                                    accountsSelector.currentIndex)
                     token.accountAddress = item.address
                     token.accountName = item.name
-
-                    root.deployFeesRequested()
                 })
             }
         }

ui/app/AppLayouts/Communities/views/EditAirdropView.qml

@@ -59,13 +59,18 @@ StatusScrollView {
 
     onFeesPerSelectedContractChanged: {
         feesModel.clear()
-        feesPerSelectedContract.forEach(entry => {
+        
+        let feeSource = feesPerSelectedContract
+        if(!feeSource || feeSource.length === 0) // if no fees are available, show the placeholder text based on selection
+            feeSource = ModelUtils.modelToArray(root.selectedHoldingsModel, ["contractUniqueKey"])
+
+        feeSource.forEach(entry => {
             feesModel.append({
                 contractUniqueKey: entry.contractUniqueKey,
                 title: qsTr("Airdrop %1 on %2")
                                     .arg(ModelUtils.getByKey(root.selectedHoldingsModel, "contractUniqueKey", entry.contractUniqueKey, "symbol"))
                                     .arg(ModelUtils.getByKey(root.selectedHoldingsModel, "contractUniqueKey", entry.contractUniqueKey, "networkText")),
-                feeText: entry.feeText
+                feeText: entry.feeText ?? ""
             })
         })
     }

ui/app/AppLayouts/Communities/views/EditCommunityTokenView.qml

@@ -24,15 +24,11 @@ StatusScrollView {
     property int viewWidth: 560 // by design
     property bool isAssetView: false
     property int validationMode: StatusInput.ValidationMode.OnlyWhenDirty
+
     property var tokensModel
     property var tokensModelWallet
-
+    property TokenObject token: TokenObject {
-    property TokenObject collectible: TokenObject {
+        type: root.isAssetView ? Constants.TokenType.ERC20 : Constants.TokenType.ERC721
-        type: Constants.TokenType.ERC721
-    }
-
-    property TokenObject asset: TokenObject{
-        type: Constants.TokenType.ERC20
     }
     
     // Used for reference validation when editing a failed deployment
@@ -53,12 +49,11 @@ StatusScrollView {
     property bool isFeeLoading
 
     readonly property string feeLabel:
-        isAssetView ? qsTr("Mint asset on %1").arg(asset.chainName)
+        isAssetView ? qsTr("Mint asset on %1").arg(root.token.chainName)
-                    : qsTr("Mint collectible on %1").arg(collectible.chainName)
+                    : qsTr("Mint collectible on %1").arg(root.token.chainName)
 
     signal chooseArtWork
     signal previewClicked
-    signal deployFeesRequested
 
     QtObject {
         id: d
@@ -69,7 +64,7 @@ StatusScrollView {
                                               && symbolInput.valid
                                               && (unlimitedSupplyChecker.checked || (!unlimitedSupplyChecker.checked && parseInt(supplyInput.text) > 0))
                                               && (!root.isAssetView  || (root.isAssetView && assetDecimalsInput.valid))
-                                              && !root.isFeeLoading && root.feeErrorText === "" && !requestFeeDelayTimer.running
+                                              && deployFeeSubscriber.feeText !== "" && deployFeeSubscriber.feeErrorText === ""
 
         readonly property int imageSelectorRectWidth: root.isAssetView ? 128 : 290
 
@@ -83,10 +78,7 @@ StatusScrollView {
     contentHeight: mainLayout.height
 
     Component.onCompleted: {
-        if(root.isAssetView)
+        networkSelector.setChain(root.token.chainId)
-            networkSelector.setChain(asset.chainId)
-        else
-            networkSelector.setChain(collectible.chainId)
     }
 
     ColumnLayout {
@@ -106,8 +98,8 @@ StatusScrollView {
 
             Layout.fillWidth: true
             Layout.preferredHeight: d.imageSelectorRectWidth
-            dataImage: root.isAssetView ? asset.artworkSource : collectible.artworkSource
+            dataImage: root.token.artworkSource
-            artworkSource: root.isAssetView ? asset.artworkSource : collectible.artworkSource
+            artworkSource: root.token.artworkSource
             editorAnchorLeft: false
             editorRoundedImage: root.isAssetView
             uploadTextLabel.uploadText: root.isAssetView ? qsTr("Upload") : qsTr("Drag and Drop or Upload Artwork")
@@ -116,25 +108,15 @@ StatusScrollView {
             editorTitle: root.isAssetView ? qsTr("Asset icon") : qsTr("Collectible artwork")
             acceptButtonText: root.isAssetView ? qsTr("Upload asset icon") : qsTr("Upload collectible artwork")
 
-            onArtworkSourceChanged: {
+            onArtworkSourceChanged: root.token.artworkSource = artworkSource
-                if(root.isAssetView)
+            onArtworkCropRectChanged: root.token.artworkCropRect = artworkCropRect
-                    asset.artworkSource = artworkSource
-                else
-                    collectible.artworkSource = artworkSource
-            }
-            onArtworkCropRectChanged: {
-                if(root.isAssetView)
-                    asset.artworkCropRect = artworkCropRect
-                else
-                    collectible.artworkCropRect = artworkCropRect
-            }
         }
 
         CustomStatusInput {
             id: nameInput
 
             label: qsTr("Name")
-            text: root.isAssetView ? asset.name : collectible.name
+            text: root.token.name
             charLimit: 15
             placeholderText: qsTr("Name")
             validationMode: root.validationMode
@@ -144,7 +126,7 @@ StatusScrollView {
                                          qsTr("Your token name contains invalid characters (use A-Z and 0-9, hyphens and underscores only)")
             extraValidator.validate: function (value) {
                 // If minting failed, we can retry same deployment, so same name allowed
-                const allowRepeatedName = (root.isAssetView ? asset.deployState : collectible.deployState) === Constants.ContractTransactionStatus.Failed
+                const allowRepeatedName = root.token.deployState === Constants.ContractTransactionStatus.Failed
                 if(allowRepeatedName)
                     if(nameInput.text === root.referenceName)
                         return true
@@ -154,19 +136,14 @@ StatusScrollView {
             }
             extraValidator.errorMessage: qsTr("You have used this token name before")
 
-            onTextChanged: {
+            onTextChanged: root.token.name = text
-                if(root.isAssetView)
-                    asset.name = text
-                else
-                    collectible.name = text
-            }
         }
 
         CustomStatusInput {
             id: descriptionInput
 
             label: qsTr("Description")
-            text: root.isAssetView ? asset.description : collectible.description
+            text: root.token.description
             charLimit: 280
             placeholderText: root.isAssetView ? qsTr("Describe your asset") : qsTr("Describe your collectible")
             input.multiline: true
@@ -179,19 +156,14 @@ StatusScrollView {
             regexValidator.regularExpression: Constants.regularExpressions.ascii
             regexValidator.errorMessage: qsTr("Only A-Z, 0-9 and standard punctuation allowed")
 
-            onTextChanged: {
+            onTextChanged: root.token.description
-                if(root.isAssetView)
-                    asset.description = text
-                else
-                    collectible.description = text
-            }
         }
 
         CustomStatusInput {
             id: symbolInput
 
             label: qsTr("Symbol")
-            text: root.isAssetView ? asset.symbol : collectible.symbol
+            text: root.token.symbol
             charLimit: 6
             placeholderText: root.isAssetView ? qsTr("e.g. ETH"): qsTr("e.g. DOODLE")
             validationMode: root.validationMode
@@ -201,7 +173,7 @@ StatusScrollView {
             regexValidator.regularExpression: Constants.regularExpressions.capitalOnly
             extraValidator.validate: function (value) {
                 // If minting failed, we can retry same deployment, so same symbol allowed
-                const allowRepeatedName = (root.isAssetView ? asset.deployState : collectible.deployState) === Constants.ContractTransactionStatus.Failed
+                const allowRepeatedName = root.token.deployState === Constants.ContractTransactionStatus.Failed
                 if(allowRepeatedName)
                     if(symbolInput.text.toUpperCase() === root.referenceSymbol.toUpperCase())
                         return true
@@ -216,10 +188,7 @@ StatusScrollView {
             onTextChanged: {
                 const cursorPos = input.edit.cursorPosition
                 const upperSymbol = text.toUpperCase()
-                if(root.isAssetView)
+                root.token.symbol = upperSymbol
-                    asset.symbol = upperSymbol
-                else
-                    collectible.symbol = upperSymbol
                 text = upperSymbol // breaking the binding on purpose but so does validate() and onTextChanged() internal handler
                 input.edit.cursorPosition = cursorPos
             }
@@ -237,15 +206,12 @@ StatusScrollView {
 
             label: qsTr("Unlimited supply")
             description: qsTr("Enable to allow the minting of additional tokens in the future. Disable to specify a finite supply")
-            checked: root.isAssetView ? asset.infiniteSupply : collectible.infiniteSupply
+            checked: root.token.infiniteSupply
 
             onCheckedChanged: {
                 if(!checked) supplyInput.forceActiveFocus()
 
-                if(root.isAssetView)
+                root.token.infiniteSupply = checked
-                    asset.infiniteSupply = checked
-                else
-                    collectible.infiniteSupply = checked
             }
         }
 
@@ -254,12 +220,8 @@ StatusScrollView {
 
             visible: !unlimitedSupplyChecker.checked
             label: qsTr("Total finite supply")
-            text: {
+            text: SQUtils.AmountsArithmetic.toNumber(root.token.supply,
-                const token = root.isAssetView ? root.asset : root.collectible
+                                                          root.token.multiplierIndex)
-
-                return SQUtils.AmountsArithmetic.toNumber(token.supply,
-                                                          token.multiplierIndex)
-            }
 
             placeholderText: qsTr("e.g. 300")
             minLengthValidator.errorMessage: qsTr("Please enter a total finite supply")
@@ -274,9 +236,8 @@ StatusScrollView {
                 if (Number.isNaN(supplyNumber) || Object.values(errors).length)
                     return
 
-                const token = root.isAssetView ? root.asset : root.collectible
                 token.supply = SQUtils.AmountsArithmetic.fromNumber(
-                            supplyNumber, token.multiplierIndex).toFixed(0)
+                            supplyNumber, root.token.multiplierIndex).toFixed(0)
             }
         }
 
@@ -286,9 +247,9 @@ StatusScrollView {
             visible: !root.isAssetView
             label: checked ? qsTr("Not transferable (Soulbound)") : qsTr("Transferable")
             description: qsTr("If enabled, the token is locked to the first address it is sent to and can never be transferred to another address. Useful for tokens that represent Admin permissions")
-            checked: !collectible.transferable
+            checked: !root.token.transferable
 
-            onCheckedChanged: collectible.transferable = !checked
+            onCheckedChanged: root.token.transferable = !checked
         }
 
         CustomSwitchRowComponent {
@@ -297,8 +258,8 @@ StatusScrollView {
             visible: !root.isAssetView
             label: qsTr("Remotely destructible")
             description: qsTr("Enable to allow you to destroy tokens remotely. Useful for revoking permissions from individuals")
-            checked: !!collectible ? collectible.remotelyDestruct : true
+            checked: !!root.token ? root.token.remotelyDestruct : true
-            onCheckedChanged: collectible.remotelyDestruct = checked
+            onCheckedChanged: root.token.remotelyDestruct = checked
         }
 
         CustomStatusInput {
@@ -309,7 +270,7 @@ StatusScrollView {
             charLimit: 2
             charLimitLabel: qsTr("Max 10")
             placeholderText: "2"
-            text: !!asset ? asset.decimals : ""
+            text: root.token.decimals
             validationMode: StatusInput.ValidationMode.Always
             minLengthValidator.errorMessage: qsTr("Please enter how many decimals your token should have")
             regexValidator.errorMessage: d.hasEmoji(text) ? qsTr("Your decimal amount is too cool (use 0-9 only)") :
@@ -317,7 +278,7 @@ StatusScrollView {
             regexValidator.regularExpression: Constants.regularExpressions.numerical
             extraValidator.validate: function (value) { return parseInt(value) > 0 && parseInt(value) <= 10 }
             extraValidator.errorMessage: qsTr("Enter a number between 1 and 10")
-            onTextChanged: asset.decimals = parseInt(text)
+            onTextChanged: root.token.decimals = parseInt(text)
         }
 
         FeesBox {
@@ -338,44 +299,17 @@ StatusScrollView {
                 readonly property bool error: root.feeErrorText !== ""
             }
 
-            Timer {
-                id: requestFeeDelayTimer
-
-                interval: 500
-                onTriggered: root.deployFeesRequested()
-            }
-
-            readonly property bool triggerFeeReevaluation: {
-                dropAreaItem.artworkSource
-                nameInput.text
-                descriptionInput.text
-                symbolInput.text
-                supplyInput.text
-                unlimitedSupplyChecker.checked
-                transferableChecker.checked
-                remotelyDestructChecker.checked
-                feesBox.accountsSelector.currentIndex
-                asset.chainId
-                collectible.chainId
-
-                requestFeeDelayTimer.restart()
-                return true
-            }
-
             accountsSelector.model: root.accounts
 
-            readonly property TokenObject token: root.isAssetView ? root.asset
-                                                                  : root.collectible
-
             // account can be changed also on preview page and it should be
             // reflected in the form after navigating back
             Connections {
-                target: feesBox.token
+                target: root.token
 
                 function onAccountAddressChanged() {
                     const idx = SQUtils.ModelUtils.indexOf(
                                         feesBox.accountsSelector.model, "address",
-                                        feesBox.token.accountAddress)
+                                        root.token.accountAddress)
 
                     feesBox.accountsSelector.currentIndex = idx
                 }
@@ -387,8 +321,8 @@ StatusScrollView {
 
                 const item = SQUtils.ModelUtils.get(
                                accountsSelector.model, accountsSelector.currentIndex)
-                token.accountAddress = item.address
+                root.token.accountAddress = item.address
-                token.accountName = item.name
+                root.token.accountName = item.name
             }
         }
 
@@ -511,15 +445,9 @@ StatusScrollView {
             multiSelection: false
 
             onToggleNetwork: (network) => {
-                if(root.isAssetView) {
+                root.token.chainId = network.chainId
-                    asset.chainId = network.chainId
+                root.token.chainName = network.chainName
-                    asset.chainName = network.chainName
+                root.token.chainIcon = network.iconUrl
-                    asset.chainIcon = network.iconUrl
-                } else {
-                    collectible.chainId = network.chainId
-                    collectible.chainName = network.chainName
-                    collectible.chainIcon = network.iconUrl
-                }
             }
         }
     }

ui/app/AppLayouts/Communities/views/EditOwnerTokenView.qml

@@ -69,7 +69,6 @@ StatusScrollView {
         .arg(communityName).arg(ownerToken.chainName)
 
     signal mintClicked
-    signal deployFeesRequested
 
     QtObject {
         id: d
@@ -175,8 +174,6 @@ StatusScrollView {
                 onAddressChanged: {
                     ownerToken.accountAddress = address
                     tMasterToken.accountAddress = address
-
-                    requestFeeDelayTimer.restart()
                 }
                 control.onDisplayTextChanged: {
                     ownerToken.accountName = control.displayText
@@ -324,16 +321,7 @@ StatusScrollView {
                 tMasterToken.chainId = network.chainId
                 tMasterToken.chainName = network.chainName
                 tMasterToken.chainIcon = network.iconUrl
-
-                requestFeeDelayTimer.restart()
             }
         }
     }
-
-    Timer {
-        id: requestFeeDelayTimer
-
-        interval: 500
-        onTriggered: root.deployFeesRequested()
-    }
 }

ui/imports/shared/stores/CommunityTokensStore.qml

@@ -12,10 +12,10 @@ QtObject {
     property var enabledNetworks: networksModule.enabled
     property var allNetworks: networksModule.all
 
-    signal deployFeeUpdated(var ethCurrency, var fiatCurrency, int error)
+    signal deployFeeUpdated(var ethCurrency, var fiatCurrency, int error, string responseId)
-    signal selfDestructFeeUpdated(var ethCurrency, var fiatCurrency, int error)
+    signal selfDestructFeeUpdated(var ethCurrency, var fiatCurrency, int error, string responseId)
     signal airdropFeeUpdated(var airdropFees)
-    signal burnFeeUpdated(var ethCurrency, var fiatCurrency, int error)
+    signal burnFeeUpdated(var ethCurrency, var fiatCurrency, int error, string responseId)
 
     signal deploymentStateChanged(string communityId, int status, string url)
     signal ownerTokenDeploymentStateChanged(string communityId, int status, string url)
@@ -63,18 +63,22 @@ QtObject {
     readonly property Connections connections: Connections {
         target: communityTokensModuleInst
 
-        function onDeployFeeUpdated(ethCurrency, fiatCurrency, errorCode) {
+        function onDeployFeeUpdated(ethCurrency, fiatCurrency, errorCode, responseId) {
-            root.deployFeeUpdated(ethCurrency, fiatCurrency, errorCode)
+            root.deployFeeUpdated(ethCurrency, fiatCurrency, errorCode, responseId)
         }
 
-        function onSelfDestructFeeUpdated(ethCurrency, fiatCurrency, errorCode) {
+        function onSelfDestructFeeUpdated(ethCurrency, fiatCurrency, errorCode, responseId) {
-            root.selfDestructFeeUpdated(ethCurrency, fiatCurrency, errorCode)
+            root.selfDestructFeeUpdated(ethCurrency, fiatCurrency, errorCode, responseId)
         }
 
         function onAirdropFeesUpdated(jsonFees) {
             root.airdropFeeUpdated(JSON.parse(jsonFees))
         }
 
+        function onBurnFeeUpdated(ethCurrency, fiatCurrency, errorCode, responseId) {
+            root.burnFeeUpdated(ethCurrency, fiatCurrency, errorCode, responseId)
+        }
+
         function onDeploymentStateChanged(communityId, status, url) {
             root.deploymentStateChanged(communityId, status, url)
         }
@@ -98,14 +102,22 @@ QtObject {
         function onBurnStateChanged(communityId, tokenName, status, url) {
             root.burnStateChanged(communityId, tokenName, status, url)
         }
-
-        function onBurnFeeUpdated(ethCurrency, fiatCurrency, errorCode) {
-            root.burnFeeUpdated(ethCurrency, fiatCurrency, errorCode)
-        }
     }
 
-    function computeDeployFee(chainId, accountAddress, tokenType, isOwnerDeployment) {
+        // Burn:
-        communityTokensModuleInst.computeDeployFee(chainId, accountAddress, tokenType, isOwnerDeployment)
+    function computeBurnFee(tokenKey, amount, accountAddress, requestId) {
+        console.assert(typeof amount === "string")
+        communityTokensModuleInst.computeBurnFee(tokenKey, amount, accountAddress, requestId)
+    }
+
+    function computeAirdropFee(communityId, contractKeysAndAmounts, addresses, feeAccountAddress, requestId) {
+        communityTokensModuleInst.computeAirdropFee(
+                    communityId, JSON.stringify(contractKeysAndAmounts),
+                    JSON.stringify(addresses), feeAccountAddress, requestId)
+    }
+
+    function computeDeployFee(chainId, accountAddress, tokenType, isOwnerDeployment, requestId) {
+        communityTokensModuleInst.computeDeployFee(chainId, accountAddress, tokenType, isOwnerDeployment, requestId)
     }
 
     /**
@@ -117,20 +129,14 @@ QtObject {
       *   }
       * ]
       */
-    function computeSelfDestructFee(walletsAndAmounts, tokenKey, accountAddress) {
+    function computeSelfDestructFee(walletsAndAmounts, tokenKey, accountAddress, requestId) {
-        communityTokensModuleInst.computeSelfDestructFee(JSON.stringify(walletsAndAmounts), tokenKey, accountAddress)
+        communityTokensModuleInst.computeSelfDestructFee(JSON.stringify(walletsAndAmounts), tokenKey, accountAddress, requestId)
     }
 
     function remoteSelfDestructCollectibles(communityId, walletsAndAmounts, tokenKey, accountAddress) {
         communityTokensModuleInst.selfDestructCollectibles(communityId, JSON.stringify(walletsAndAmounts), tokenKey, accountAddress)
     }
 
-    // Burn:
-    function computeBurnFee(tokenKey, amount, accountAddress) {
-        console.assert(typeof amount === "string")
-        communityTokensModuleInst.computeBurnFee(tokenKey, amount, accountAddress)
-    }
-
     function burnToken(communityId, tokenKey, burnAmount, accountAddress) {
         console.assert(typeof burnAmount === "string")
         communityTokensModuleInst.burnTokens(communityId, tokenKey, burnAmount, accountAddress)
@@ -140,10 +146,4 @@ QtObject {
     function airdrop(communityId, airdropTokens, addresses, feeAccountAddress) {
         communityTokensModuleInst.airdropTokens(communityId, JSON.stringify(airdropTokens), JSON.stringify(addresses), feeAccountAddress)
     }
-
-    function computeAirdropFee(communityId, contractKeysAndAmounts, addresses, feeAccountAddress) {
-        communityTokensModuleInst.computeAirdropFee(
-                    communityId, JSON.stringify(contractKeysAndAmounts),
-                    JSON.stringify(addresses), feeAccountAddress)
-    }
 }