added support for sending reaction

src/client/action/roomTimeline.js

@@ -0,0 +1,33 @@
+import initMatrix from '../initMatrix';
+
+async function redactEvent(roomId, eventId, reason) {
+  const mx = initMatrix.matrixClient;
+
+  try {
+    await mx.redactEvent(roomId, eventId, undefined, typeof reason === 'undefined' ? undefined : { reason });
+    return true;
+  } catch (e) {
+    throw new Error(e);
+  }
+}
+
+async function sendReaction(roomId, toEventId, reaction) {
+  const mx = initMatrix.matrixClient;
+
+  try {
+    await mx.sendEvent(roomId, 'm.reaction', {
+      'm.relates_to': {
+        event_id: toEventId,
+        key: reaction,
+        rel_type: 'm.annotation',
+      },
+    });
+  } catch (e) {
+    throw new Error(e);
+  }
+}
+
+export {
+  redactEvent,
+  sendReaction,
+};