chore(@desktop/walletconnect): communication between qt desktop app and loaded wallet connect sdk is made via web channel

Makefile

@@ -186,7 +186,7 @@ ifneq ($(detected_OS),Windows)
  endif
  DOTHERSIDE_LIBFILE := vendor/DOtherSide/build/lib/libDOtherSideStatic.a
  # order matters here, due to "-Wl,-as-needed"
- NIM_PARAMS += --passL:"$(DOTHERSIDE_LIBFILE)" --passL:"$(shell PKG_CONFIG_PATH="$(QT5_PCFILEDIR)" pkg-config --libs Qt5Core Qt5Qml Qt5Gui Qt5Quick Qt5QuickControls2 Qt5Widgets Qt5Svg Qt5Multimedia Qt5WebView)"
+ NIM_PARAMS += --passL:"$(DOTHERSIDE_LIBFILE)" --passL:"$(shell PKG_CONFIG_PATH="$(QT5_PCFILEDIR)" pkg-config --libs Qt5Core Qt5Qml Qt5Gui Qt5Quick Qt5QuickControls2 Qt5Widgets Qt5Svg Qt5Multimedia Qt5WebView Qt5WebChannel)"
 else
  NIM_EXTRA_PARAMS := --passL:"-lsetupapi -lhid"
 endif

ui/app/AppLayouts/Wallet/views/walletconnect/WalletConnect.qml

@@ -17,11 +17,6 @@ Item {
 
     property bool sdkReady: state === d.sdkReadyState
 
-    function setUriAndPair(wcUri) {
-        pairLinkInput.text = wcUri
-        d.sdkView.pair(wcUri)
-    }
-
     // wallet_connect.Controller \see wallet_section/wallet_connect/controller.nim
     required property var controller
 
@@ -205,7 +200,6 @@ Item {
 
     component SdkViewComponent: WalletConnectSDK {
         projectId: controller.projectId
-        backgroundColor: root.backgroundColor
 
         onSdkInit: function(success, info) {
             d.setDetailsText(info)
@@ -270,14 +264,13 @@ Item {
             root.state = d.waitingUserResponseToSessionRequest
         }
 
-        onResponseTimeout: {
+        onPairSessionProposalExpired: {
             d.setStatusText(`Timeout waiting for response. Reusing URI?`, "red")
         }
 
         onStatusChanged: function(message) {
             statusText.text = message
         }
-
     }
 
     QtObject {
@@ -326,10 +319,6 @@ Item {
 
             root.state = d.waitingPairState
         }
-    }
-
-    Connections {
-        target: root.controller
 
         function onRespondSessionRequest(sessionRequestJson, signedJson, error) {
             console.log("@dd respondSessionRequest", sessionRequestJson, signedJson, error)

ui/app/AppLayouts/Wallet/views/walletconnect/WalletConnectSDK.qml

@@ -1,255 +1,71 @@
 import QtQuick 2.15
-import QtWebView 1.15
+import QtWebEngine 1.10
-// TODO #12434: remove debugging WebEngineView code
+import QtWebChannel 1.15
-// import QtWebEngine 1.10
 import QtQuick.Controls 2.15
 import QtQuick.Layouts 1.15
 
 import StatusQ.Core.Utils 0.1 as SQUtils
 
-// Control used to instantiate and run the the WalletConnect web SDK
+Item {
-// The view is not used to draw anything, but has to be visible to be able to run JS code
-// Use the \c backgroundColor property to blend in with the background
-// \warning A too smaller height might cause rendering errors
-// TODO #12434: remove debugging WebEngineView code
-WebView {
-//WebEngineView {
     id: root
 
+    required property string projectId
+    readonly property alias sdkReady: d.sdkReady
+    readonly property alias pairingsModel: d.pairingsModel
+
     implicitWidth: 1
     implicitHeight: 1
 
-    required property string projectId
+    signal statusChanged(string message)
-    required property color backgroundColor
-
-    readonly property alias sdkReady: d.sdkReady
-    readonly property alias pairingsModel: d.pairingsModel
-
     signal sdkInit(bool success, var result)
     signal pairSessionProposal(bool success, var sessionProposal)
+    signal pairSessionProposalExpired()
     signal pairAcceptedResult(bool success, var sessionType)
     signal pairRejectedResult(bool success, var result)
     signal sessionRequestEvent(var sessionRequest)
     signal sessionRequestUserAnswerResult(bool accept, string error)
-    signal responseTimeout()
 
-    // TODO: proper report
+    function pair(pairLink)
-    signal statusChanged(string message)
+    {
-
+        wcCalls.pair(pairLink)
-    function pair(pairLink) {
-        let callStr = d.generateSdkCall("pair", `"${pairLink}"`, RequestCodes.PairSuccess, RequestCodes.PairError)
-        d.requestSdkAsync(callStr)
     }
 
-    function approvePairSession(sessionProposal, supportedNamespaces) {
+    function approvePairSession(sessionProposal, supportedNamespaces)
-        let callStr = d.generateSdkCall("approvePairSession", `${JSON.stringify(sessionProposal)}, ${JSON.stringify(supportedNamespaces)}`, RequestCodes.ApprovePairSuccess, RequestCodes.ApprovePairSuccess)
+    {
-
+        wcCalls.approvePairSession(sessionProposal, supportedNamespaces)
-        d.requestSdkAsync(callStr)
     }
 
-    function rejectPairSession(id) {
+    function rejectPairSession(id)
-        let callStr = d.generateSdkCall("rejectPairSession", id, RequestCodes.RejectPairSuccess, RequestCodes.RejectPairError)
+    {
-
+        wcCalls.rejectPairSession(id)
-        d.requestSdkAsync(callStr)
     }
 
     function acceptSessionRequest(topic, id, signature) {
-        let callStr = d.generateSdkCall("respondSessionRequest", `"${topic}", ${id}, "${signature}"`, RequestCodes.AcceptSessionSuccess, RequestCodes.AcceptSessionError)
+        wcCalls.acceptSessionRequest(topic, id, signature)
-
-        d.requestSdkAsync(callStr)
     }
 
     function rejectSessionRequest(topic, id, error) {
-        let callStr = d.generateSdkCall("rejectSessionRequest", `"${topic}", ${id}, ${error}`, RequestCodes.RejectSessionSuccess, RequestCodes.RejectSessionError)
+        wcCalls.rejectSessionRequest(topic, id, error)
-
-        d.requestSdkAsync(callStr)
-    }
-
-    // TODO #12434: remove debugging WebEngineView code
-    onLoadingChanged: function(loadRequest) {
-        console.debug(`@dd WalletConnectSDK.onLoadingChanged; status: ${loadRequest.status}; error: ${loadRequest.errorString}`)
-        switch(loadRequest.status) {
-            case WebView.LoadSucceededStatus:
-            // case WebEngineView.LoadSucceededStatus:
-                d.init(root.projectId)
-                break
-            case WebView.LoadFailedStatus:
-            // case WebEngineView.LoadFailedStatus:
-                root.statusChanged(`<font color="red">Failed loading SDK JS code; error: "${loadRequest.errorString}"</font>`)
-                break
-            case WebView.LoadStartedStatus:
-            // case WebEngineView.LoadStartedStatus:
-                root.statusChanged(`<font color="blue">Loading SDK JS code</font>`)
-                break
-        }
-    }
-
-    Component.onCompleted: {
-        console.debug(`@dd WalletConnectSDK onCompleted`)
-        var scriptSrc = SQUtils.StringUtils.readTextFile(":/app/AppLayouts/Wallet/views/walletconnect/sdk/generated/bundle.js")
-        // Load bundle from disk if not found in resources (Storybook)
-        if (scriptSrc === "") {
-            scriptSrc = SQUtils.StringUtils.readTextFile("./AppLayouts/Wallet/views/walletconnect/sdk/generated/bundle.js")
-            if (scriptSrc === "") {
-                console.error("Failed to read WalletConnect SDK bundle")
-                return
-            }
-        }
-
-        let htmlSrc = `<!DOCTYPE html><html><head><!--<title>TODO: Test</title>--><script type='text/javascript'>${scriptSrc}</script></head><body style='background-color: ${root.backgroundColor.toString()};'></body></html>`
-
-        console.debug(`@dd WalletConnectSDK.loadHtml; htmlSrc len: ${htmlSrc.length}`)
-        root.loadHtml(htmlSrc, "https://status.app")
-    }
-
-    Timer {
-        id: timer
-
-        interval: 100
-        repeat: true
-        running: false
-        triggeredOnStart: true
-
-        property int errorCount: 0
-
-        onTriggered: {
-            root.runJavaScript(
-                "wcResult",
-                function(wcResult) {
-                    if (!wcResult) {
-                        return
-                    }
-
-                    let done = false
-                    if (wcResult.error) {
-                        console.debug(`WC JS error response - ${JSON.stringify(wcResult)}`)
-                        done = true
-                        if (!d.sdkReady) {
-                            root.statusChanged(`<font color="red">[${timer.errorCount++}] Failed SDK init; error: ${wcResult.error}</font>`)
-                        } else {
-                            root.statusChanged(`<font color="red">[${timer.errorCount++}] Operation error: ${wcResult.error}</font>`)
-                        }
-                    }
-
-                    if (wcResult.state !== undefined) {
-                        switch (wcResult.state) {
-                            case RequestCodes.SdkInitSuccess:
-                                d.sdkReady = true
-                                root.sdkInit(true, "")
-                                d.startListeningForEvents()
-                                break
-                            case RequestCodes.SdkInitError:
-                                d.sdkReady = false
-                                root.sdkInit(false, wcResult.error)
-                                break
-                            case RequestCodes.PairSuccess:
-                                root.pairSessionProposal(true, wcResult.result)
-                                d.getPairings()
-                                break
-                            case RequestCodes.PairError:
-                                root.pairSessionProposal(false, wcResult.error)
-                                break
-                            case RequestCodes.ApprovePairSuccess:
-                                root.pairAcceptedResult(true, "")
-                                d.getPairings()
-                                break
-                            case RequestCodes.ApprovePairError:
-                                root.pairAcceptedResult(false, wcResult.error)
-                                d.getPairings()
-                                break
-                            case RequestCodes.RejectPairSuccess:
-                                root.pairRejectedResult(true, "")
-                                break
-                            case RequestCodes.RejectPairError:
-                                root.pairRejectedResult(false, wcResult.error)
-                                break
-                            case RequestCodes.AcceptSessionSuccess:
-                                root.sessionRequestUserAnswerResult(true, "")
-                                break
-                            case RequestCodes.AcceptSessionError:
-                                root.sessionRequestUserAnswerResult(true, wcResult.error)
-                                break
-                            case RequestCodes.RejectSessionSuccess:
-                                root.sessionRequestUserAnswerResult(false, "")
-                                break
-                            case RequestCodes.RejectSessionError:
-                                root.sessionRequestUserAnswerResult(false, wcResult.error)
-                                break
-                            case RequestCodes.GetPairings:
-                                d.populatePairingsModel(wcResult.result)
-                                break
-                            case RequestCodes.GetPairingsError:
-                                console.error(`WalletConnectSDK - getPairings error: ${wcResult.error}`)
-                                break
-                            default: {
-                                root.statusChanged(`<font color="red">[${timer.errorCount++}] Unknown state: ${wcResult.state}</font>`)
-                            }
-                        }
-
-                        done = true
-                    }
-
-                    if (done) {
-                        timer.stop()
-                    }
-                }
-            )
-        }
-    }
-
-    Timer {
-        id: responseTimeoutTimer
-
-        interval: 10000
-        repeat: false
-        running: timer.running
-
-        onTriggered: {
-            timer.stop()
-            root.responseTimeout()
-        }
-    }
-
-    Timer {
-        id: eventsTimer
-
-        interval: 100
-        repeat: true
-        running: false
-
-        onTriggered: {
-            root.runJavaScript("window.wcEventResult ? window.wcEventResult.shift() : null", function(event) {
-                if (event) {
-                    switch(event.name) {
-                        case "session_request":
-                            root.sessionRequestEvent(event.payload)
-                            break
-                        default:
-                            console.error("WC unknown event type: ", event.type)
-                            break
-                    }
-                }
-            })
-        }
     }
 
     QtObject {
         id: d
 
-        property var sessionProposal: null
-        property var sessionType: null
         property bool sdkReady: false
-
         property ListModel pairingsModel: pairings
 
         onSdkReadyChanged: {
-            if (sdkReady) {
+            if (sdkReady)
-                d.getPairings()
+            {
+                d.resetPairingsModel()
             }
         }
 
-        function populatePairingsModel(pairList) {
+        function resetPairingsModel()
+        {
             pairings.clear();
+
+            wcCalls.getPairings((pairList) => {
                                     for (let i = 0; i < pairList.length; i++) {
                                         pairings.append({
                                                             active: pairList[i].active,
@@ -257,70 +73,266 @@ WebView {
                                                             expiry: pairList[i].expiry
                                                         });
                                     }
+                                })
         }
 
-
+        function getPairingTopicFromPairingUrl(url)
-        function isWaitingForSdk() {
+        {
-            return timer.running
+            if (!url.startsWith("wc:"))
+            {
+                return null;
+            }
+            const atIndex = url.indexOf("@");
+            if (atIndex < 0)
+            {
+                return null;
+            }
+            return url.slice(3, atIndex);
+        }
     }
 
-        function generateSdkCall(methodName, paramsStr, successState, errorState) {
+    QtObject {
-            return "wcResult = {}; try { wc." + methodName  + "(" + paramsStr + ").then((callRes) => { wcResult = {state: " + successState + ", error: null, result: callRes}; }).catch((error) => { wcResult = {state: " + errorState + ", error: error}; }); } catch (e) { wcResult = {state: " + errorState + ", error: \"Exception: \" + e.message}; }; wcResult"
+        id: wcCalls
+
+        function init() {
+            console.debug(`@dd WalletConnectSDK.wcCall.init; root.projectId: ${root.projectId}`)
+
+            webEngineView.runJavaScript(`wc.init("${root.projectId}")`, function(result) {
+
+                console.debug(`@dd WalletConnectSDK.wcCall.init; response: ${JSON.stringify(result, null, 2)}`)
+
+                if (result && !!result.error)
+                {
+                    console.error("init: ", result.error)
                 }
-        function requestSdkAsync(jsCode) {
+            })
-            root.runJavaScript(jsCode,
-                function(result) {
-                    timer.restart()
-                }
-            )
         }
 
-        function requestSdk(methodName, paramsStr, successState, errorState) {
+        function getPairings(callback) {
-            const jsCode = "wcResult = {}; try { const callRes = wc." + methodName + "(" + (paramsStr ? (paramsStr) : "") + "); wcResult = {state: " + successState + ", error: null, result: callRes}; } catch (e) { wcResult = {state: " + errorState + ", error: \"Exception: \" + e.message};  }; wcResult"
+            console.debug(`@dd WalletConnectSDK.wcCall.getPairings;`)
-            root.runJavaScript(jsCode,
+
-                function(result) {
+            webEngineView.runJavaScript(`wc.getPairings()`, function(result) {
-                    timer.restart()
+
-                }
+                console.debug(`@dd WalletConnectSDK.wcCall.getPairings; response: ${JSON.stringify(result, null, 2)}`)
-            )
+
+                if (result)
+                {
+                    if (!!result.error) {
+                        console.error("getPairings: ", result.error)
+                        return
                     }
 
-        function startListeningForEvents() {
+                    callback(result.result)
-            const jsCode = "
+                    return
-                try {
-                    function processWCEvents() {
-                        window.wcEventResult = [];
-                        window.wcEventError = null
-                        window.wc.registerForSessionRequest((event) => {
-                            window.wcEventResult.push({name: 'session_request', payload: event});
-                        });
                 }
-                    processWCEvents();
+            })
-                } catch (e) {
-                    window.wcEventError = e
         }
-                window.wcEventError"
 
-            root.runJavaScript(jsCode,
+        function pair(pairLink) {
-                function(result) {
+            console.debug(`@dd WalletConnectSDK.wcCall.pair; pairLink: ${pairLink}`)
-                    if (result) {
+
-                        console.error("startListeningForEvents: processWCEvents error", result)
+            wcCalls.getPairings((allPairings) => {
+
+                                    console.debug(`@dd WalletConnectSDK.wcCall.pair; response: ${JSON.stringify(allPairings, null, 2)}`)
+
+                                    let pairingTopic = d.getPairingTopicFromPairingUrl(pairLink);
+
+                                    // Find pairing by topic
+                                    const pairing = allPairings.find((p) => p.topic === pairingTopic);
+                                    if (pairing)
+                                    {
+                                        if (pairing.active) {
+                                            console.warn("pair: already paired")
                                             return
                                         }
                                     }
+
+                                    webEngineView.runJavaScript(`wc.pair("${pairLink}")`, function(result) {
+                                        if (result && !!result.error)
+                                        {
+                                            console.error("pair: ", result.error)
+                                        }
+                                    })
+                                }
                                 )
-            eventsTimer.start()
         }
 
-        function init(projectId) {
+        function approvePairSession(sessionProposal, supportedNamespaces) {
-            d.requestSdkAsync(generateSdkCall("init", `"${projectId}"`, RequestCodes.SdkInitSuccess, RequestCodes.SdkInitError))
+            console.debug(`@dd WalletConnectSDK.wcCall.approvePairSession; sessionProposal: ${JSON.stringify(sessionProposal)}, supportedNamespaces: ${JSON.stringify(supportedNamespaces)}`)
+
+            webEngineView.runJavaScript(`wc.approvePairSession(${JSON.stringify(sessionProposal)}, ${JSON.stringify(supportedNamespaces)})`, function(result) {
+
+                console.debug(`@dd WalletConnectSDK.wcCall.approvePairSession; response: ${JSON.stringify(result, null, 2)}`)
+
+                if (result) {
+                    if (!!result.error)
+                    {
+                        console.error("approvePairSession: ", result.error)
+                        root.pairAcceptedResult(false, result.error)
+                        return
+                    }
+                    root.pairAcceptedResult(true, result.error)
+                }
+                d.resetPairingsModel()
+            })
         }
 
-        function getPairings(projectId) {
+        function rejectPairSession(id) {
-            d.requestSdk("getPairings", `null`, RequestCodes.GetPairings, RequestCodes.GetPairingsError)
+            console.debug(`@dd WalletConnectSDK.wcCall.rejectPairSession; id: ${id}`)
+
+            webEngineView.runJavaScript(`wc.rejectPairSession(${id})`, function(result) {
+
+                console.debug(`@dd WalletConnectSDK.wcCall.rejectPairSession; response: ${JSON.stringify(result, null, 2)}`)
+
+                if (result) {
+                    if (!!result.error)
+                    {
+                        console.error("rejectPairSession: ", result.error)
+                        root.pairRejectedResult(false, result.error)
+                        return
+                    }
+                    root.pairRejectedResult(true, result.error)
+                }
+                d.resetPairingsModel()
+            })
+        }
+
+        function acceptSessionRequest(topic, id, signature) {
+            console.debug(`@dd WalletConnectSDK.wcCall.acceptSessionRequest; topic: "${topic}", id: ${id}, signature: "${signature}"`)
+
+            webEngineView.runJavaScript(`wc.respondSessionRequest("${topic}", ${id}, "${signature}")`, function(result) {
+
+                console.debug(`@dd WalletConnectSDK.wcCall.acceptSessionRequest; response: ${JSON.stringify(allPairings, null, 2)}`)
+
+                if (result) {
+                    if (!!result.error)
+                    {
+                        console.error("respondSessionRequest: ", result.error)
+                        root.sessionRequestUserAnswerResult(true, result.error)
+                        return
+                    }
+                    root.sessionRequestUserAnswerResult(true, result.error)
+                }
+                d.resetPairingsModel()
+            })
+        }
+
+        function rejectSessionRequest(topic, id, error) {
+            console.debug(`@dd WalletConnectSDK.wcCall.rejectSessionRequest; topic: "${topic}", id: ${id}, error: "${error}"`)
+
+            webEngineView.runJavaScript(`wc.rejectSessionRequest("${topic}", ${id}, "${error}")`, function(result) {
+
+                console.debug(`@dd WalletConnectSDK.wcCall.rejectSessionRequest; response: ${JSON.stringify(result, null, 2)}`)
+
+                if (result) {
+                    if (!!result.error)
+                    {
+                        console.error("rejectSessionRequest: ", result.error)
+                        root.sessionRequestUserAnswerResult(false, result.error)
+                        return
+                    }
+                    root.sessionRequestUserAnswerResult(false, result.error)
+                }
+                d.resetPairingsModel()
+            })
+        }
+    }
+
+    QtObject {
+        id: statusObject
+
+        WebChannel.id: "statusObject"
+
+        function sdkInitialized(error)
+        {
+            d.sdkReady = !error
+            root.sdkInit(d.sdkReady, error)
+        }
+
+        function onSessionProposal(details)
+        {
+            console.debug(`@dd WalletConnectSDK.onSessionProposal; details: ${JSON.stringify(details, null, 2)}`)
+            root.pairSessionProposal(true, details)
+        }
+
+        function onSessionUpdate(details)
+        {
+            console.debug(`@dd TODO WalletConnectSDK.onSessionUpdate; details: ${JSON.stringify(details, null, 2)}`)
+        }
+
+        function onSessionExtend(details)
+        {
+            console.debug(`@dd TODO WalletConnectSDK.onSessionExtend; details: ${JSON.stringify(details, null, 2)}`)
+        }
+
+        function onSessionPing(details)
+        {
+            console.debug(`@dd TODO WalletConnectSDK.onSessionPing; details: ${JSON.stringify(details, null, 2)}`)
+        }
+
+        function onSessionDelete(details)
+        {
+            console.debug(`@dd TODO WalletConnectSDK.onSessionDelete; details: ${JSON.stringify(details, null, 2)}`)
+        }
+
+        function onSessionExpire(details)
+        {
+            console.debug(`@dd TODO WalletConnectSDK.onSessionExpire; details: ${JSON.stringify(details, null, 2)}`)
+        }
+
+        function onSessionRequest(details)
+        {
+            console.debug(`@dd WalletConnectSDK.onSessionRequest; details: ${JSON.stringify(details, null, 2)}`)
+            root.sessionRequestEvent(details)
+        }
+
+        function onSessionRequestSent(details)
+        {
+            console.debug(`@dd TODO WalletConnectSDK.onSessionRequestSent; details: ${JSON.stringify(details, null, 2)}`)
+        }
+
+        function onSessionEvent(details)
+        {
+            console.debug(`@dd TODO WalletConnectSDK.onSessionEvent; details: ${JSON.stringify(details, null, 2)}`)
+        }
+
+        function onProposalExpire(details)
+        {
+            console.debug(`@dd WalletConnectSDK.onProposalExpire; details: ${JSON.stringify(details, null, 2)}`)
+            root.pairSessionProposalExpired()
         }
     }
 
     ListModel {
         id: pairings
     }
+
+    WebChannel {
+        id: statusChannel
+        registeredObjects: [statusObject]
+    }
+
+    WebEngineView {
+        id: webEngineView
+
+        anchors.fill: parent
+
+        url: "qrc:/app/AppLayouts/Wallet/views/walletconnect/sdk/src/index.html"
+        webChannel: statusChannel
+
+        onLoadingChanged: function(loadRequest) {
+            console.debug(`@dd WalletConnectSDK.onLoadingChanged; status: ${loadRequest.status}; error: ${loadRequest.errorString}`)
+            switch(loadRequest.status) {
+            case WebEngineView.LoadSucceededStatus:
+                wcCalls.init()
+                break
+            case WebEngineView.LoadFailedStatus:
+                root.statusChanged(`<font color="red">Failed loading SDK JS code; error: "${loadRequest.errorString}"</font>`)
+                break
+            case WebEngineView.LoadStartedStatus:
+                root.statusChanged(`<font color="blue">Loading SDK JS code</font>`)
+                break
+            }
+        }
+    }
 }

ui/app/AppLayouts/Wallet/views/walletconnect/sdk/src/index.html

@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <script src="qrc:/app/AppLayouts/Wallet/views/walletconnect/sdk/generated/bundle.js"></script>
+    </head>
+    <body>
+    </body>
+</html>

ui/app/AppLayouts/Wallet/views/walletconnect/sdk/src/index.js

@@ -3,19 +3,27 @@ import { Web3Wallet } from "@walletconnect/web3wallet";
 
 import AuthClient from '@walletconnect/auth-client'
 
+import { QWebChannel } from './qwebchannel';
+
 // import the builder util
 import { buildApprovedNamespaces, getSdkError } from "@walletconnect/utils";
 import { formatJsonRpcResult, formatJsonRpcError } from "@walletconnect/jsonrpc-utils";
 
-// "Export" API to window
-// Workaround, tried using export via output.module: true in webpack.config.js, but it didn't work
 window.wc = {
     core: null,
     web3wallet: null,
     authClient: null,
+    statusObject: null,
 
     init: function (projectId) {
-        return new Promise(async (resolve) => {
+        (async () => {
+            try {
+                await createWebChannel();
+            } catch (error) {
+                wc.statusObject.sdkInitialized(error);
+                return
+            }
+
             window.wc.core = new Core({
                 projectId: projectId,
             });
@@ -33,59 +41,75 @@ window.wc = {
             window.wc.authClient = await AuthClient.init({
                 projectId: projectId,
                 metadata: window.wc.web3wallet.metadata,
-            })
+            });
 
-            resolve()
+            // connect session responses https://specs.walletconnect.com/2.0/specs/clients/sign/session-events#events
-        })
+            window.wc.web3wallet.on("session_proposal", async (details) => {
+                wc.statusObject.onSessionProposal(details)
+            });
+
+            window.wc.web3wallet.on("session_update", async (details) => {
+                wc.statusObject.onSessionUpdate(details)
+            });
+
+            window.wc.web3wallet.on("session_extend", async (details) => {
+                wc.statusObject.onSessionExtend(details)
+            });
+
+            window.wc.web3wallet.on("session_ping", async (details) => {
+                wc.statusObject.onSessionPing(details)
+            });
+
+            window.wc.web3wallet.on("session_delete", async (details) => {
+                wc.statusObject.onSessionDelete(details)
+            });
+
+            window.wc.web3wallet.on("session_expire", async (details) => {
+                wc.statusObject.onSessionExpire(details)
+            });
+
+            window.wc.web3wallet.on("session_request", async (details) => {
+                wc.statusObject.onSessionRequest(details)
+            });
+
+            window.wc.web3wallet.on("session_request_sent", async (details) => {
+                wc.statusObject.onSessionRequestSent(details)
+            });
+
+            window.wc.web3wallet.on("session_event", async (details) => {
+                wc.statusObject.onSessionEvent(details)
+            });
+
+            window.wc.web3wallet.on("proposal_expire", async (details) => {
+                wc.statusObject.onProposalExpire(details)
+            });
+
+            wc.statusObject.sdkInitialized("");
+        })();
+
+        return { result: "ok", error: "" };
     },
 
-    alreadyPaired: new Error("Already paired"),
-    waitingForApproval: new Error("Waiting for approval"),
     // TODO: there is a corner case when attempting to pair with a link that is already paired or was rejected won't trigger any event back
     pair: function (uri) {
-        let pairingTopic = getPairingTopicFromPairingUrl(uri);
+        return {
-
+            result: window.wc.web3wallet.pair({ uri }),
-        const pairings = window.wc.core.pairing.getPairings();
+            error: ""
-        // Find pairing by topic
+        };
-        const pairing = pairings.find((p) => p.topic === pairingTopic);
-        if (pairing) {
-            if (pairing.active) {
-                return new Promise((_, reject) => {
-                    reject(window.wc.alreadyPaired);
-                });
-            }
-        }
-
-        let pairPromise = window.wc.web3wallet
-            .pair({ uri: uri })
-
-        return new Promise((resolve, reject) => {
-            pairPromise
-                .then(() => {
-                    window.wc.web3wallet.on("session_proposal", async (sessionProposal) => {
-                        resolve(sessionProposal);
-                    });
-                })
-                .catch((error) => {
-                    reject(error);
-                });
-        });
     },
 
     getPairings: function () {
-        return window.wc.core.pairing.getPairings();
+        return {
+            result: window.wc.core.pairing.getPairings(),
+            error: ""
+        };
     },
 
     disconnect: function (topic) {
-        return window.wc.core.pairing.disconnect({ topic: topic});
+        return {
-    },
+            result: window.wc.core.pairing.disconnect({ topic: topic }),
-
+            error: ""
-    registerForSessionRequest: function (callback) {
+        };
-        window.wc.web3wallet.on("session_request", callback);
-    },
-
-    registerForSessionDelete: function (callback) {
-        window.wc.web3wallet.on("session_delete", callback);
     },
 
     approvePairSession: function (sessionProposal, supportedNamespaces) {
@@ -96,47 +120,29 @@ window.wc = {
             supportedNamespaces: supportedNamespaces,
         });
 
-        return window.wc.web3wallet.approveSession({
+        return {
+            result: window.wc.web3wallet.approveSession({
                 id,
                 namespaces: approvedNamespaces,
-        });
+            }),
+            error: ""
+        };
     },
     rejectPairSession: function (id) {
-        return window.wc.web3wallet.rejectSession({
+        return {
+            result: window.wc.web3wallet.rejectSession({
                 id: id,
                 reason: getSdkError("USER_REJECTED"), // TODO USER_REJECTED_METHODS, USER_REJECTED_CHAINS, USER_REJECTED_EVENTS
-        });
+            }),
+            error: ""
+        };
     },
 
     auth: function (uri) {
-        let pairingTopic = getPairingTopicFromPairingUrl(uri);
+        return {
-
+            result: window.wc.authClient.core.pairing.pair({ uri }),
-        const pairings = window.wc.core.pairing.getPairings();
+            error: ""
-        // Find pairing by topic
+        };
-        const pairing = pairings.find((p) => p.topic === pairingTopic);
-        if (pairing) {
-            if (pairing.active) {
-                return new Promise((_, reject) => {
-                    reject(window.wc.alreadyPaired);
-                });
-            }
-        }
-
-        let pairPromise = window.wc.authClient.core.pairing
-            .pair({ uri })
-
-        return new Promise((resolve, reject) => {
-            pairPromise
-                .then(() => {
-                    // TODO: check if we can separate using the URI info
-                    window.wc.authClient.on("auth_request", async (authProposal) => {
-                        resolve(authProposal);
-                    });
-                })
-                .catch((error) => {
-                    reject(error);
-                });
-        });
     },
 
     approveAuth: function (authProposal) {
@@ -151,7 +157,8 @@ window.wc = {
         // TODO: signature
         const signature = "0x123456789"
 
-        return window.wc.authClient.respond(
+        return {
+            result: window.wc.authClient.respond(
             {
                 id: id,
                 signature: {
@@ -159,43 +166,49 @@ window.wc = {
                     t: "eip191",
                 },
             },
-            iss
+            iss),
-        );
+            error: ""
+        };
     },
+
     rejectAuth: function (id) {
-        return window.wc.authClient.reject(id);
+        return {
+            result: window.wc.authClient.reject(id),
+            error: ""
+        };
     },
 
     respondSessionRequest: function (topic, id, signature) {
         const response = formatJsonRpcResult(id, signature)
-        return window.wc.web3wallet.respondSessionRequest({ topic, response });
+        return {
+            result: window.wc.web3wallet.respondSessionRequest({ topic, response }),
+            error: ""
+        };
     },
 
     rejectSessionRequest: function (topic, id, error = false) {
         const errorType = error ? "SESSION_SETTLEMENT_FAILED" : "USER_REJECTED";
-        return window.wc.web3wallet.respondSessionRequest({
+        return {
+            result: window.wc.web3wallet.respondSessionRequest({
                 topic: topic,
                 response: formatJsonRpcError(id, getSdkError(errorType)),
-        });
+            }),
-    },
+            error: ""
-
+        };
-
-    disconnectAll: function () {
-        const pairings = window.wc.core.pairing.getPairings();
-        pairings.forEach((p) => {
-            window.wc.core.pairing.disconnect({ topic: p.topic });
-        });
     },
 };
 
-// Returns null if not a pairing url
+function createWebChannel(projectId) {
-function getPairingTopicFromPairingUrl(url) {
+    return new Promise((resolve, reject) => {
-    if (!url.startsWith("wc:")) {
+        window.wc.channel = new QWebChannel(qt.webChannelTransport, function (channel) {
-        return null;
+            let statusObject = channel.objects.statusObject;
+
+            if (!statusObject) {
+                reject(new Error("Unable to resolve statusObject"));
+            } else {
+                window.wc.statusObject = statusObject;
+                resolve();
             }
-    const atIndex = url.indexOf("@");
+        });
-    if (atIndex < 0) {
+    });
-        return null;
-    }
-    return url.slice(3, atIndex);
 }

ui/app/AppLayouts/Wallet/views/walletconnect/sdk/src/qwebchannel.js

@@ -0,0 +1,448 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2016 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtWebChannel module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+"use strict";
+
+var QWebChannelMessageTypes = {
+    signal: 1,
+    propertyUpdate: 2,
+    init: 3,
+    idle: 4,
+    debug: 5,
+    invokeMethod: 6,
+    connectToSignal: 7,
+    disconnectFromSignal: 8,
+    setProperty: 9,
+    response: 10,
+};
+
+var QWebChannel = function(transport, initCallback)
+{
+    if (typeof transport !== "object" || typeof transport.send !== "function") {
+        console.error("The QWebChannel expects a transport object with a send function and onmessage callback property." +
+                      " Given is: transport: " + typeof(transport) + ", transport.send: " + typeof(transport.send));
+        return;
+    }
+
+    var channel = this;
+    this.transport = transport;
+
+    this.send = function(data)
+    {
+        if (typeof(data) !== "string") {
+            data = JSON.stringify(data);
+        }
+        channel.transport.send(data);
+    }
+
+    this.transport.onmessage = function(message)
+    {
+        var data = message.data;
+        if (typeof data === "string") {
+            data = JSON.parse(data);
+        }
+        switch (data.type) {
+            case QWebChannelMessageTypes.signal:
+                channel.handleSignal(data);
+                break;
+            case QWebChannelMessageTypes.response:
+                channel.handleResponse(data);
+                break;
+            case QWebChannelMessageTypes.propertyUpdate:
+                channel.handlePropertyUpdate(data);
+                break;
+            default:
+                console.error("invalid message received:", message.data);
+                break;
+        }
+    }
+
+    this.execCallbacks = {};
+    this.execId = 0;
+    this.exec = function(data, callback)
+    {
+        if (!callback) {
+            // if no callback is given, send directly
+            channel.send(data);
+            return;
+        }
+        if (channel.execId === Number.MAX_VALUE) {
+            // wrap
+            channel.execId = Number.MIN_VALUE;
+        }
+        if (data.hasOwnProperty("id")) {
+            console.error("Cannot exec message with property id: " + JSON.stringify(data));
+            return;
+        }
+        data.id = channel.execId++;
+        channel.execCallbacks[data.id] = callback;
+        channel.send(data);
+    };
+
+    this.objects = {};
+
+    this.handleSignal = function(message)
+    {
+        var object = channel.objects[message.object];
+        if (object) {
+            object.signalEmitted(message.signal, message.args);
+        } else {
+            console.warn("Unhandled signal: " + message.object + "::" + message.signal);
+        }
+    }
+
+    this.handleResponse = function(message)
+    {
+        if (!message.hasOwnProperty("id")) {
+            console.error("Invalid response message received: ", JSON.stringify(message));
+            return;
+        }
+        channel.execCallbacks[message.id](message.data);
+        delete channel.execCallbacks[message.id];
+    }
+
+    this.handlePropertyUpdate = function(message)
+    {
+        message.data.forEach(data => {
+            var object = channel.objects[data.object];
+            if (object) {
+                object.propertyUpdate(data.signals, data.properties);
+            } else {
+                console.warn("Unhandled property update: " + data.object + "::" + data.signal);
+            }
+        });
+        channel.exec({type: QWebChannelMessageTypes.idle});
+    }
+
+    this.debug = function(message)
+    {
+        channel.send({type: QWebChannelMessageTypes.debug, data: message});
+    };
+
+    channel.exec({type: QWebChannelMessageTypes.init}, function(data) {
+        for (const objectName of Object.keys(data)) {
+            new QObject(objectName, data[objectName], channel);
+        }
+
+        // now unwrap properties, which might reference other registered objects
+        for (const objectName of Object.keys(channel.objects)) {
+            channel.objects[objectName].unwrapProperties();
+        }
+
+        if (initCallback) {
+            initCallback(channel);
+        }
+        channel.exec({type: QWebChannelMessageTypes.idle});
+    });
+};
+
+function QObject(name, data, webChannel)
+{
+    this.__id__ = name;
+    webChannel.objects[name] = this;
+
+    // List of callbacks that get invoked upon signal emission
+    this.__objectSignals__ = {};
+
+    // Cache of all properties, updated when a notify signal is emitted
+    this.__propertyCache__ = {};
+
+    var object = this;
+
+    // ----------------------------------------------------------------------
+
+    this.unwrapQObject = function(response)
+    {
+        if (response instanceof Array) {
+            // support list of objects
+            return response.map(qobj => object.unwrapQObject(qobj))
+        }
+        if (!(response instanceof Object))
+            return response;
+
+        if (!response["__QObject*__"] || response.id === undefined) {
+            var jObj = {};
+            for (const propName of Object.keys(response)) {
+                jObj[propName] = object.unwrapQObject(response[propName]);
+            }
+            return jObj;
+        }
+
+        var objectId = response.id;
+        if (webChannel.objects[objectId])
+            return webChannel.objects[objectId];
+
+        if (!response.data) {
+            console.error("Cannot unwrap unknown QObject " + objectId + " without data.");
+            return;
+        }
+
+        var qObject = new QObject( objectId, response.data, webChannel );
+        qObject.destroyed.connect(function() {
+            if (webChannel.objects[objectId] === qObject) {
+                delete webChannel.objects[objectId];
+                // reset the now deleted QObject to an empty {} object
+                // just assigning {} though would not have the desired effect, but the
+                // below also ensures all external references will see the empty map
+                // NOTE: this detour is necessary to workaround QTBUG-40021
+                Object.keys(qObject).forEach(name => delete qObject[name]);
+            }
+        });
+        // here we are already initialized, and thus must directly unwrap the properties
+        qObject.unwrapProperties();
+        return qObject;
+    }
+
+    this.unwrapProperties = function()
+    {
+        for (const propertyIdx of Object.keys(object.__propertyCache__)) {
+            object.__propertyCache__[propertyIdx] = object.unwrapQObject(object.__propertyCache__[propertyIdx]);
+        }
+    }
+
+    function addSignal(signalData, isPropertyNotifySignal)
+    {
+        var signalName = signalData[0];
+        var signalIndex = signalData[1];
+        object[signalName] = {
+            connect: function(callback) {
+                if (typeof(callback) !== "function") {
+                    console.error("Bad callback given to connect to signal " + signalName);
+                    return;
+                }
+
+                object.__objectSignals__[signalIndex] = object.__objectSignals__[signalIndex] || [];
+                object.__objectSignals__[signalIndex].push(callback);
+
+                // only required for "pure" signals, handled separately for properties in propertyUpdate
+                if (isPropertyNotifySignal)
+                    return;
+
+                // also note that we always get notified about the destroyed signal
+                if (signalName === "destroyed" || signalName === "destroyed()" || signalName === "destroyed(QObject*)")
+                    return;
+
+                // and otherwise we only need to be connected only once
+                if (object.__objectSignals__[signalIndex].length == 1) {
+                    webChannel.exec({
+                        type: QWebChannelMessageTypes.connectToSignal,
+                        object: object.__id__,
+                        signal: signalIndex
+                    });
+                }
+            },
+            disconnect: function(callback) {
+                if (typeof(callback) !== "function") {
+                    console.error("Bad callback given to disconnect from signal " + signalName);
+                    return;
+                }
+                object.__objectSignals__[signalIndex] = object.__objectSignals__[signalIndex] || [];
+                var idx = object.__objectSignals__[signalIndex].indexOf(callback);
+                if (idx === -1) {
+                    console.error("Cannot find connection of signal " + signalName + " to " + callback.name);
+                    return;
+                }
+                object.__objectSignals__[signalIndex].splice(idx, 1);
+                if (!isPropertyNotifySignal && object.__objectSignals__[signalIndex].length === 0) {
+                    // only required for "pure" signals, handled separately for properties in propertyUpdate
+                    webChannel.exec({
+                        type: QWebChannelMessageTypes.disconnectFromSignal,
+                        object: object.__id__,
+                        signal: signalIndex
+                    });
+                }
+            }
+        };
+    }
+
+    /**
+     * Invokes all callbacks for the given signalname. Also works for property notify callbacks.
+     */
+    function invokeSignalCallbacks(signalName, signalArgs)
+    {
+        var connections = object.__objectSignals__[signalName];
+        if (connections) {
+            connections.forEach(function(callback) {
+                callback.apply(callback, signalArgs);
+            });
+        }
+    }
+
+    this.propertyUpdate = function(signals, propertyMap)
+    {
+        // update property cache
+        for (const propertyIndex of Object.keys(propertyMap)) {
+            var propertyValue = propertyMap[propertyIndex];
+            object.__propertyCache__[propertyIndex] = this.unwrapQObject(propertyValue);
+        }
+
+        for (const signalName of Object.keys(signals)) {
+            // Invoke all callbacks, as signalEmitted() does not. This ensures the
+            // property cache is updated before the callbacks are invoked.
+            invokeSignalCallbacks(signalName, signals[signalName]);
+        }
+    }
+
+    this.signalEmitted = function(signalName, signalArgs)
+    {
+        invokeSignalCallbacks(signalName, this.unwrapQObject(signalArgs));
+    }
+
+    function addMethod(methodData)
+    {
+        var methodName = methodData[0];
+        var methodIdx = methodData[1];
+
+        // Fully specified methods are invoked by id, others by name for host-side overload resolution
+        var invokedMethod = methodName[methodName.length - 1] === ')' ? methodIdx : methodName
+
+        object[methodName] = function() {
+            var args = [];
+            var callback;
+            var errCallback;
+            for (var i = 0; i < arguments.length; ++i) {
+                var argument = arguments[i];
+                if (typeof argument === "function")
+                    callback = argument;
+                else if (argument instanceof QObject && webChannel.objects[argument.__id__] !== undefined)
+                    args.push({
+                        "id": argument.__id__
+                    });
+                else
+                    args.push(argument);
+            }
+
+            var result;
+            // during test, webChannel.exec synchronously calls the callback
+            // therefore, the promise must be constucted before calling
+            // webChannel.exec to ensure the callback is set up
+            if (!callback && (typeof(Promise) === 'function')) {
+              result = new Promise(function(resolve, reject) {
+                callback = resolve;
+                errCallback = reject;
+              });
+            }
+
+            webChannel.exec({
+                "type": QWebChannelMessageTypes.invokeMethod,
+                "object": object.__id__,
+                "method": invokedMethod,
+                "args": args
+            }, function(response) {
+                if (response !== undefined) {
+                    var result = object.unwrapQObject(response);
+                    if (callback) {
+                        (callback)(result);
+                    }
+                } else if (errCallback) {
+                  (errCallback)();
+                }
+            });
+
+            return result;
+        };
+    }
+
+    function bindGetterSetter(propertyInfo)
+    {
+        var propertyIndex = propertyInfo[0];
+        var propertyName = propertyInfo[1];
+        var notifySignalData = propertyInfo[2];
+        // initialize property cache with current value
+        // NOTE: if this is an object, it is not directly unwrapped as it might
+        // reference other QObject that we do not know yet
+        object.__propertyCache__[propertyIndex] = propertyInfo[3];
+
+        if (notifySignalData) {
+            if (notifySignalData[0] === 1) {
+                // signal name is optimized away, reconstruct the actual name
+                notifySignalData[0] = propertyName + "Changed";
+            }
+            addSignal(notifySignalData, true);
+        }
+
+        Object.defineProperty(object, propertyName, {
+            configurable: true,
+            get: function () {
+                var propertyValue = object.__propertyCache__[propertyIndex];
+                if (propertyValue === undefined) {
+                    // This shouldn't happen
+                    console.warn("Undefined value in property cache for property \"" + propertyName + "\" in object " + object.__id__);
+                }
+
+                return propertyValue;
+            },
+            set: function(value) {
+                if (value === undefined) {
+                    console.warn("Property setter for " + propertyName + " called with undefined value!");
+                    return;
+                }
+                object.__propertyCache__[propertyIndex] = value;
+                var valueToSend = value;
+                if (valueToSend instanceof QObject && webChannel.objects[valueToSend.__id__] !== undefined)
+                    valueToSend = { "id": valueToSend.__id__ };
+                webChannel.exec({
+                    "type": QWebChannelMessageTypes.setProperty,
+                    "object": object.__id__,
+                    "property": propertyIndex,
+                    "value": valueToSend
+                });
+            }
+        });
+
+    }
+
+    // ----------------------------------------------------------------------
+
+    data.methods.forEach(addMethod);
+
+    data.properties.forEach(bindGetterSetter);
+
+    data.signals.forEach(function(signal) { addSignal(signal, false); });
+
+    Object.assign(object, data.enums);
+}
+
+//required for use with nodejs
+if (typeof module === 'object') {
+    module.exports = {
+        QWebChannel: QWebChannel
+    };
+}

ui/generate-rcc.go

@@ -26,6 +26,7 @@ var qrcExtensions = map[string]bool{
 	".gif":  true,
 	".json": true,
 	".mdwn": true,
+	".html": true,
 }
 
 func main() {