Quick n dirty verificatio request viewer in devtools

res/css/views/dialogs/_DevtoolsDialog.scss

@@ -189,3 +189,37 @@ limitations under the License.
         }
     }
 }
+
+.mx_DevTools_VerificationRequest {
+    border: 1px solid #cccccc;
+    border-radius: 3px;
+    padding: 1px 5px;
+    margin-bottom: 6px;
+    font-family: "Inconsolata", courier;
+
+    dl {
+        display: grid;
+        grid-template-columns: max-content auto;
+        margin: 0;
+    }
+
+    dd {
+        grid-column-start: 2;
+    }
+
+    dd:empty {
+        color: #666666;
+        &::after {
+            content: "(empty)";
+        }
+    }
+
+    dt {
+        font-weight: bold;
+        grid-column-start: 1;
+    }
+
+    dt::after {
+        content: ":";
+    }
+}

src/components/views/dialogs/DevtoolsDialog.js

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React from 'react';
+import React, {useState, useEffect} from 'react';
 import PropTypes from 'prop-types';
 import * as sdk from '../../../index';
 import SyntaxHighlight from '../elements/SyntaxHighlight';
@@ -23,6 +23,15 @@ import { Room } from "matrix-js-sdk";
 import Field from "../elements/Field";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
 
+import {
+    PHASE_UNSENT,
+    PHASE_REQUESTED,
+    PHASE_READY,
+    PHASE_DONE,
+    PHASE_STARTED,
+    PHASE_CANCELLED,
+} from "matrix-js-sdk/src/crypto/verification/request/VerificationRequest"
+
 class GenericEditor extends React.PureComponent {
     // static propTypes = {onBack: PropTypes.func.isRequired};
 
@@ -605,12 +614,83 @@ class ServersInRoomList extends React.PureComponent {
     }
 }
 
+const PHASE_MAP = {
+    [PHASE_UNSENT]: "unsent",
+    [PHASE_REQUESTED]: "requested",
+    [PHASE_READY]: "ready",
+    [PHASE_DONE]: "done",
+    [PHASE_STARTED]: "started",
+    [PHASE_CANCELLED]: "cancelled",
+}
+
+function VerificationRequest({txnId, request}) {
+    const [, updateState] = useState();
+    const [timeout, setTimeout] = useState(request.timeout);
+
+    /* Re-render if something changes state */
+    useEffect(() => {
+        request.on("change", updateState);
+        return () => request.off("change", updateState);
+    }, []);
+
+    /* Keep re-rendering if there's a timeout */
+    useEffect(() => {
+        if (timeout == 0) return;
+
+        const id = setInterval(() => {
+           setTimeout(request.timeout);
+        }, 500);
+
+        return () => { clearInterval(id); }
+    }, []);
+
+    return (<div className="mx_DevTools_VerificationRequest">
+        <dl>
+            <dt>Transaction</dt>
+            <dd>{txnId}</dd>
+            <dt>Phase</dt>
+            <dd>{PHASE_MAP[request.phase] || request.phase}</dd>
+            <dt>Timeout</dt>
+            <dd>{Math.floor(timeout / 1000)}</dd>
+            <dt>Methods</dt>
+            <dd>{request.methods && request.methods.join(", ")}</dd>
+            <dt>requestingUserId</dt>
+            <dd>{request.requestingUserId}</dd>
+        </dl>
+    </div>);
+}
+
+class VerificationExplorer extends React.PureComponent {
+    static getLabel() {
+        return _t("Verification Requests");
+    }
+
+    /* Ensure this.context is the cli */
+    static contextType = MatrixClientContext;
+
+    render() {
+        const cli = this.context;
+        const room = this.props.room;
+        const inRoomChannel = cli._crypto._inRoomVerificationRequests;
+        const inRoomRequests = (inRoomChannel._requestsByRoomId || new Map()).get(room.roomId) || new Map();
+
+        return (<div>
+            <div className="mx_Dialog_content">
+                {Array.from(inRoomRequests.entries()).reverse().map(([txnId, request]) =>
+                    <VerificationRequest txnId={txnId} request={request} key={txnId}/>
+                )}
+            </div>
+        </div>);
+    }
+}
+
 const Entries = [
     SendCustomEvent,
     RoomStateExplorer,
     SendAccountData,
     AccountDataExplorer,
     ServersInRoomList,
+    VerificationExplorer,
 ];
 
 export default class DevtoolsDialog extends React.PureComponent {

src/i18n/strings/en_EN.json

@@ -1524,6 +1524,7 @@
     "Explore Room State": "Explore Room State",
     "Explore Account Data": "Explore Account Data",
     "View Servers in Room": "View Servers in Room",
+    "Verification Requests": "Verification Requests",
     "Toolbox": "Toolbox",
     "Developer Tools": "Developer Tools",
     "An error has occurred.": "An error has occurred.",