Test jig for sending encrypted to-device messages

todevice-test.js

import olm from "olm";
import sdk from "matrix-js-sdk";
import { LocalStorage } from "node-localstorage";

global.Olm = olm;

const myUserId = "@matthewtest94:matrix.org";
const myAccessToken = "secret";
const matrixClient = sdk.createClient({
   baseUrl: "http://matrix.org",
   accessToken: myAccessToken,
   userId: myUserId,
   deviceId: "JKGRJUVTBL",
   sessionStore: new sdk.WebStorageSessionStore(new LocalStorage("./scratch")),
   cryptoStore: new sdk.MemoryCryptoStore(),
});

await matrixClient.initCrypto();
await matrixClient.startClient();

const targetUserId = "@matthewtest9:matrix.org";

await matrixClient.crypto.downloadKeys([targetUserId]);
const devices = await matrixClient.crypto.getStoredDevicesForUser(targetUserId);

const userDeviceMap = [];
for (const device of devices) {
    userDeviceMap.push({ userId: targetUserId, deviceInfo: device });
}

await matrixClient.crypto.encryptAndSendToDevices(
    userDeviceMap,
    {
        "type": "org.matrix.test",
        "contents": {
            "body": "i am a fish",
        }
    }
);