element-web/playwright/e2e/crypto/test_indexeddb_cryptostore_dump/README.md

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# Dump of libolm indexeddb cryptostore
This directory contains, in `dump.json`, a dump of a real indexeddb store from a session using
libolm crypto.
The corresponding pickle key is `+1k2Ppd7HIisUY824v7JtV3/oEE4yX0TqtmNPyhaD7o`.
This directory also contains, in `index.html` and `load.js`, a page which will populate indexeddb with the data
(and the pickle key). This can be served via a Playwright [Route](https://playwright.dev/docs/api/class-route) so as to
populate the indexeddb before the main application loads. Note that encrypting the pickle key requires the test User ID
and Device ID, so they must be stored in `localstorage` before loading `index.html`.
## Creation of the dump file
The dump was created by pasting the following into the browser console:
```javascript
async function exportIndexedDb(name) {
const db = await new Promise((resolve, reject) => {
const dbReq = indexedDB.open(name);
dbReq.onerror = reject;
dbReq.onsuccess = () => resolve(dbReq.result);
});
const storeNames = db.objectStoreNames;
const exports = {};
for (const store of storeNames) {
exports[store] = [];
const txn = db.transaction(store, "readonly");
const objectStore = txn.objectStore(store);
await new Promise((resolve, reject) => {
const cursorReq = objectStore.openCursor();
cursorReq.onerror = reject;
cursorReq.onsuccess = (event) => {
const cursor = event.target.result;
if (cursor) {
const entry = { value: cursor.value };
if (!objectStore.keyPath) {
entry.key = cursor.key;
}
exports[store].push(entry);
cursor.continue();
} else {
resolve();
}
};
});
}
return exports;
}
window.saveAs(
new Blob([JSON.stringify(await exportIndexedDb("matrix-js-sdk:crypto"), null, 2)], {
type: "application/json;charset=utf-8",
}),
"dump.json",
);
```
The pickle key is extracted via `mxMatrixClientPeg.get().crypto.olmDevice.pickleKey`.