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diff --git a/lib/hooks/peer-list-hooks.js b/lib/hooks/peer-list-hooks.js
--- a/lib/hooks/peer-list-hooks.js
+++ b/lib/hooks/peer-list-hooks.js
@@ -143,6 +143,76 @@
);
}
+// Sends Olm-encrypted message to multiple peers
+function useBroadcastOlmMessage(): (
+ contentPayload: string,
+ recipients: $ReadOnlyArray<{ +userID: string, +deviceID: string }>,
+) => Promise<void> {
+ const identityContext = React.useContext(IdentityClientContext);
+ if (!identityContext) {
+ throw new Error('Identity service client is not initialized');
+ }
+ const { getAuthMetadata } = identityContext;
+
+ const { sendMessageToDevice } = useTunnelbroker();
+ const { createOlmSessionsWithPeer } = usePeerOlmSessionsCreatorContext();
+
+ return React.useCallback(
+ async (contentPayload, recipients) => {
+ const authMetadata = await getAuthMetadata();
+ const { userID: thisUserID, deviceID: thisDeviceID } = authMetadata;
+ if (!thisDeviceID || !thisUserID) {
+ throw new Error('No auth metadata');
+ }
+ const { olmAPI } = getConfig();
+ await olmAPI.initializeCryptoAccount();
+ for (const recipient of recipients) {
+ try {
+ const encryptedData = await olmAPI.encrypt(
+ contentPayload,
+ recipient.deviceID,
+ );
+ const encryptedMessage: EncryptedMessage = {
+ type: peerToPeerMessageTypes.ENCRYPTED_MESSAGE,
+ senderInfo: { deviceID: thisDeviceID, userID: thisUserID },
+ encryptedData,
+ };
+ await sendMessageToDevice({
+ deviceID: recipient.deviceID,
+ payload: JSON.stringify(encryptedMessage),
+ });
+ } catch {
+ try {
+ await createOlmSessionsWithPeer(
+ recipient.userID,
+ recipient.deviceID,
+ );
+ const encryptedData = await olmAPI.encrypt(
+ contentPayload,
+ recipient.deviceID,
+ );
+ const encryptedMessage: EncryptedMessage = {
+ type: peerToPeerMessageTypes.ENCRYPTED_MESSAGE,
+ senderInfo: { deviceID: thisDeviceID, userID: thisUserID },
+ encryptedData,
+ };
+ await sendMessageToDevice({
+ deviceID: recipient.deviceID,
+ payload: JSON.stringify(encryptedMessage),
+ });
+ } catch (err) {
+ console.warn(
+ `Error sending Olm-encrypted message to device ${recipient.deviceID}:`,
+ err,
+ );
+ }
+ }
+ }
+ },
+ [createOlmSessionsWithPeer, getAuthMetadata, sendMessageToDevice],
+ );
+}
+
function useBroadcastAccountDeletion(
options: { broadcastToOwnDevices?: boolean } = {},
): () => Promise<void> {
@@ -225,4 +295,5 @@
useBroadcastDeviceListUpdates,
useGetAndUpdateDeviceListsForUsers,
useBroadcastAccountDeletion,
+ useBroadcastOlmMessage,
};

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