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diff --git a/lib/tunnelbroker/peer-to-peer-context.js b/lib/tunnelbroker/peer-to-peer-context.js
--- a/lib/tunnelbroker/peer-to-peer-context.js
+++ b/lib/tunnelbroker/peer-to-peer-context.js
@@ -14,6 +14,7 @@
type DMOperationSpecification,
} from '../shared/dm-ops/dm-op-utils.js';
import {
+ type AuthMetadata,
IdentityClientContext,
type IdentityClientContextType,
} from '../shared/identity-client-context.js';
@@ -36,6 +37,11 @@
dmOpID: ?string,
) => void,
+sendDMOperation: (op: DMOperationSpecification) => Promise<void>,
+ +broadcastEphemeralMessage: (
+ contentPayload: string,
+ recipients: $ReadOnlyArray<{ +userID: string, +deviceID: string }>,
+ authMetadata: AuthMetadata,
+ ) => Promise<void>,
};
const PeerToPeerContext: React.Context<?PeerToPeerContextType> =
@@ -246,6 +252,69 @@
[peerOlmSessionsCreator, identityContext, sendMessageToDevice],
);
+ const broadcastEphemeralMessage = React.useCallback(
+ async (
+ contentPayload: string,
+ recipients: $ReadOnlyArray<{ +userID: string, +deviceID: string }>,
+ authMetadata: AuthMetadata,
+ ) => {
+ const { userID: thisUserID, deviceID: thisDeviceID } = authMetadata;
+ if (!thisDeviceID || !thisUserID) {
+ throw new Error('No auth metadata');
+ }
+ const { olmAPI } = getConfig();
+ await olmAPI.initializeCryptoAccount();
+
+ // We want it distinct by device ID to avoid potentially creating
+ // multiple Olm sessions with the same device simultaneously.
+ const recipientsDistinctByDeviceID = [
+ ...new Map(recipients.map(item => [item.deviceID, item])).values(),
+ ];
+ const senderInfo = { deviceID: thisDeviceID, userID: thisUserID };
+ const promises = recipientsDistinctByDeviceID.map(async recipient => {
+ try {
+ const encryptedData = await olmAPI.encrypt(
+ contentPayload,
+ recipient.deviceID,
+ );
+ const encryptedMessage: EncryptedMessage = {
+ type: peerToPeerMessageTypes.ENCRYPTED_MESSAGE,
+ senderInfo,
+ encryptedData,
+ };
+ await sendMessageToDevice({
+ deviceID: recipient.deviceID,
+ payload: JSON.stringify(encryptedMessage),
+ });
+ } catch {
+ try {
+ await peerOlmSessionsCreator(recipient.userID, recipient.deviceID);
+ const encryptedData = await olmAPI.encrypt(
+ contentPayload,
+ recipient.deviceID,
+ );
+ const encryptedMessage: EncryptedMessage = {
+ type: peerToPeerMessageTypes.ENCRYPTED_MESSAGE,
+ senderInfo,
+ encryptedData,
+ };
+ await sendMessageToDevice({
+ deviceID: recipient.deviceID,
+ payload: JSON.stringify(encryptedMessage),
+ });
+ } catch (err) {
+ console.warn(
+ `Error sending Olm-encrypted message to device ${recipient.deviceID}:`,
+ err,
+ );
+ }
+ }
+ });
+ await Promise.all(promises);
+ },
+ [peerOlmSessionsCreator, sendMessageToDevice],
+ );
+
React.useEffect(() => {
const intervalID = setInterval(
processOutboundMessages,
@@ -258,8 +327,9 @@
() => ({
processOutboundMessages,
sendDMOperation,
+ broadcastEphemeralMessage,
}),
- [processOutboundMessages, sendDMOperation],
+ [broadcastEphemeralMessage, processOutboundMessages, sendDMOperation],
);
return (

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