diff --git a/package.json b/package.json
index 32bd4f6c8..4cfe6b380 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     ],
     "dependencies": {
         "@babel/runtime": "^7.12.5",
-        "@matrix-org/matrix-sdk-crypto-js": "^0.1.0-alpha.11",
+        "@matrix-org/matrix-sdk-crypto-js": "^0.1.0",
         "another-json": "^0.2.0",
         "bs58": "^5.0.0",
         "content-type": "^1.0.4",
diff --git a/spec/integ/crypto/verification.spec.ts b/spec/integ/crypto/verification.spec.ts
index 00247ec33..8e008ad5c 100644
--- a/spec/integ/crypto/verification.spec.ts
+++ b/spec/integ/crypto/verification.spec.ts
@@ -153,6 +153,9 @@ describe.each(Object.entries(CRYPTO_BACKENDS))("verification (%s)", (backend: st
             expect(request.chosenMethod).toBe(null); // nothing chosen yet
             expect(request.initiatedByMe).toBe(true);
             expect(request.otherUserId).toEqual(TEST_USER_ID);
+            expect(request.pending).toBe(true);
+            // we're using fake timers, so the timeout should have exactly 10 minutes left still.
+            expect(request.timeout).toEqual(600_000);
 
             // and now the request should be visible via `getVerificationRequestsToDeviceInProgress`
             {
@@ -248,6 +251,7 @@ describe.each(Object.entries(CRYPTO_BACKENDS))("verification (%s)", (backend: st
             // ... and the whole thing should be done!
             await verificationPromise;
             expect(request.phase).toEqual(VerificationPhase.Done);
+            expect(request.pending).toBe(false);
 
             // at this point, cancelling should do nothing.
             await request.cancel();
@@ -564,6 +568,7 @@ describe.each(Object.entries(CRYPTO_BACKENDS))("verification (%s)", (backend: st
             expect(request.otherUserId).toEqual(TEST_USER_ID);
             expect(request.chosenMethod).toBe(null); // nothing chosen yet
             expect(canAcceptVerificationRequest(request)).toBe(true);
+            expect(request.pending).toBe(true);
 
             // Alice accepts, by sending a to-device message
             const sendToDevicePromise = expectSendToDeviceMessage("m.key.verification.ready");
diff --git a/spec/unit/rust-crypto/rust-crypto.spec.ts b/spec/unit/rust-crypto/rust-crypto.spec.ts
index 25f225e1f..7776e9ef8 100644
--- a/spec/unit/rust-crypto/rust-crypto.spec.ts
+++ b/spec/unit/rust-crypto/rust-crypto.spec.ts
@@ -14,8 +14,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import "fake-indexeddb/auto";
-import { IDBFactory } from "fake-indexeddb";
 import * as RustSdkCryptoJs from "@matrix-org/matrix-sdk-crypto-js";
 import { KeysQueryRequest, OlmMachine } from "@matrix-org/matrix-sdk-crypto-js";
 import { Mocked } from "jest-mock";
@@ -41,13 +39,6 @@ import { ServerSideSecretStorage } from "../../../src/secret-storage";
 import { CryptoCallbacks, ImportRoomKeysOpts, VerificationRequest } from "../../../src/crypto-api";
 import * as testData from "../../test-utils/test-data";
 
-afterEach(() => {
-    // reset fake-indexeddb after each test, to make sure we don't leak connections
-    // cf https://github.com/dumbmatter/fakeIndexedDB#wipingresetting-the-indexeddb-for-a-fresh-state
-    // eslint-disable-next-line no-global-assign
-    indexedDB = new IDBFactory();
-});
-
 const TEST_USER = "@alice:example.com";
 const TEST_DEVICE_ID = "TEST_DEVICE";
 
@@ -542,5 +533,5 @@ async function makeTestRustCrypto(
     secretStorage: ServerSideSecretStorage = {} as ServerSideSecretStorage,
     cryptoCallbacks: CryptoCallbacks = {} as CryptoCallbacks,
 ): Promise<RustCrypto> {
-    return await initRustCrypto(http, userId, deviceId, secretStorage, cryptoCallbacks);
+    return await initRustCrypto(http, userId, deviceId, secretStorage, cryptoCallbacks, null);
 }
diff --git a/spec/unit/rust-crypto/verification.spec.ts b/spec/unit/rust-crypto/verification.spec.ts
index b76a672d2..d74e8de1a 100644
--- a/spec/unit/rust-crypto/verification.spec.ts
+++ b/spec/unit/rust-crypto/verification.spec.ts
@@ -21,18 +21,49 @@ import { RustVerificationRequest } from "../../../src/rust-crypto/verification";
 import { OutgoingRequestProcessor } from "../../../src/rust-crypto/OutgoingRequestProcessor";
 
 describe("VerificationRequest", () => {
-    describe("startVerification", () => {
+    describe("pending", () => {
+        let request: RustVerificationRequest;
         let mockedInner: Mocked<RustSdkCryptoJs.VerificationRequest>;
-        let mockedOutgoingRequestProcessor: Mocked<OutgoingRequestProcessor>;
+
+        beforeEach(() => {
+            mockedInner = makeMockedInner();
+            request = makeTestRequest(mockedInner);
+        });
+
+        it("returns true for a created request", () => {
+            expect(request.pending).toBe(true);
+        });
+
+        it("returns false for passive requests", () => {
+            mockedInner.isPassive.mockReturnValue(true);
+            expect(request.pending).toBe(false);
+        });
+
+        it("returns false for completed requests", () => {
+            mockedInner.phase.mockReturnValue(RustSdkCryptoJs.VerificationRequestPhase.Done);
+            expect(request.pending).toBe(false);
+        });
+
+        it("returns false for cancelled requests", () => {
+            mockedInner.phase.mockReturnValue(RustSdkCryptoJs.VerificationRequestPhase.Cancelled);
+            expect(request.pending).toBe(false);
+        });
+    });
+
+    describe("timeout", () => {
+        it("passes through the result", () => {
+            const mockedInner = makeMockedInner();
+            const request = makeTestRequest(mockedInner);
+            mockedInner.timeRemainingMillis.mockReturnValue(10_000);
+            expect(request.timeout).toEqual(10_000);
+        });
+    });
+
+    describe("startVerification", () => {
         let request: RustVerificationRequest;
 
         beforeEach(() => {
-            mockedInner = {
-                registerChangesCallback: jest.fn(),
-                startSas: jest.fn(),
-            } as unknown as Mocked<RustSdkCryptoJs.VerificationRequest>;
-            mockedOutgoingRequestProcessor = {} as Mocked<OutgoingRequestProcessor>;
-            request = new RustVerificationRequest(mockedInner, mockedOutgoingRequestProcessor, undefined);
+            request = makeTestRequest();
         });
 
         it("does not permit methods other than SAS", async () => {
@@ -48,3 +79,24 @@ describe("VerificationRequest", () => {
         });
     });
 });
+
+/** build a RustVerificationRequest with default parameters */
+function makeTestRequest(
+    inner?: RustSdkCryptoJs.VerificationRequest,
+    outgoingRequestProcessor?: OutgoingRequestProcessor,
+): RustVerificationRequest {
+    inner ??= makeMockedInner();
+    outgoingRequestProcessor ??= {} as OutgoingRequestProcessor;
+    return new RustVerificationRequest(inner, outgoingRequestProcessor, undefined);
+}
+
+/** Mock up a rust-side VerificationRequest */
+function makeMockedInner(): Mocked<RustSdkCryptoJs.VerificationRequest> {
+    return {
+        registerChangesCallback: jest.fn(),
+        startSas: jest.fn(),
+        phase: jest.fn().mockReturnValue(RustSdkCryptoJs.VerificationRequestPhase.Created),
+        isPassive: jest.fn().mockReturnValue(false),
+        timeRemainingMillis: jest.fn(),
+    } as unknown as Mocked<RustSdkCryptoJs.VerificationRequest>;
+}
diff --git a/src/client.ts b/src/client.ts
index 8ef86b8fe..85d35db10 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -2206,10 +2206,12 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
      *
      * @experimental
      *
+     * @param useIndexedDB - True to use an indexeddb store, false to use an in-memory store. Defaults to 'true'.
+     *
      * @returns a Promise which will resolve when the crypto layer has been
      *    successfully initialised.
      */
-    public async initRustCrypto(): Promise<void> {
+    public async initRustCrypto({ useIndexedDB = true }: { useIndexedDB?: boolean } = {}): Promise<void> {
         if (this.cryptoBackend) {
             logger.warn("Attempt to re-initialise e2e encryption on MatrixClient");
             return;
@@ -2239,6 +2241,7 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
             deviceId,
             this.secretStorage,
             this.cryptoCallbacks,
+            useIndexedDB ? RUST_SDK_STORE_PREFIX : null,
         );
         rustCrypto.supportedVerificationMethods = this.verificationMethods;
 
diff --git a/src/rust-crypto/index.ts b/src/rust-crypto/index.ts
index 1fa8a2e93..8697095ed 100644
--- a/src/rust-crypto/index.ts
+++ b/src/rust-crypto/index.ts
@@ -18,7 +18,6 @@ import * as RustSdkCryptoJs from "@matrix-org/matrix-sdk-crypto-js";
 
 import { RustCrypto } from "./rust-crypto";
 import { logger } from "../logger";
-import { RUST_SDK_STORE_PREFIX } from "./constants";
 import { IHttpOpts, MatrixHttpApi } from "../http-api";
 import { ServerSideSecretStorage } from "../secret-storage";
 import { ICryptoCallbacks } from "../crypto";
@@ -32,6 +31,8 @@ import { ICryptoCallbacks } from "../crypto";
  * @param deviceId - The local user's Device ID.
  * @param secretStorage - Interface to server-side secret storage.
  * @param cryptoCallbacks - Crypto callbacks provided by the application
+ * @param storePrefix - the prefix to use on the indexeddbs created by rust-crypto.
+ *     If unset, a memory store will be used.
  */
 export async function initRustCrypto(
     http: MatrixHttpApi<IHttpOpts & { onlyData: true }>,
@@ -39,6 +40,7 @@ export async function initRustCrypto(
     deviceId: string,
     secretStorage: ServerSideSecretStorage,
     cryptoCallbacks: ICryptoCallbacks,
+    storePrefix: string | null,
 ): Promise<RustCrypto> {
     // initialise the rust matrix-sdk-crypto-js, if it hasn't already been done
     await RustSdkCryptoJs.initAsync();
@@ -51,7 +53,12 @@ export async function initRustCrypto(
     logger.info("Init OlmMachine");
 
     // TODO: use the pickle key for the passphrase
-    const olmMachine = await RustSdkCryptoJs.OlmMachine.initialize(u, d, RUST_SDK_STORE_PREFIX, "test pass");
+    const olmMachine = await RustSdkCryptoJs.OlmMachine.initialize(
+        u,
+        d,
+        storePrefix ?? undefined,
+        (storePrefix && "test pass") ?? undefined,
+    );
     const rustCrypto = new RustCrypto(olmMachine, http, userId, deviceId, secretStorage, cryptoCallbacks);
     await olmMachine.registerRoomKeyUpdatedCallback((sessions: RustSdkCryptoJs.RoomKeyInfo[]) =>
         rustCrypto.onRoomKeysUpdated(sessions),
diff --git a/src/rust-crypto/verification.ts b/src/rust-crypto/verification.ts
index 5382a6463..fbf65f64f 100644
--- a/src/rust-crypto/verification.ts
+++ b/src/rust-crypto/verification.ts
@@ -145,7 +145,9 @@ export class RustVerificationRequest
      * (ie it is in phase `Requested`, `Ready` or `Started`).
      */
     public get pending(): boolean {
-        throw new Error("not implemented");
+        if (this.inner.isPassive()) return false;
+        const phase = this.phase;
+        return phase !== VerificationPhase.Done && phase !== VerificationPhase.Cancelled;
     }
 
     /**
@@ -170,7 +172,7 @@ export class RustVerificationRequest
      * `null` indicates that there is no timeout
      */
     public get timeout(): number | null {
-        throw new Error("not implemented");
+        return this.inner.timeRemainingMillis();
     }
 
     /** once the phase is Started (and !initiatedByMe) or Ready: common methods supported by both sides */
diff --git a/yarn.lock b/yarn.lock
index d6a608cfd..51914809e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1426,7 +1426,7 @@
   dependencies:
     lodash "^4.17.21"
 
-"@matrix-org/matrix-sdk-crypto-js@^0.1.0-alpha.11":
+"@matrix-org/matrix-sdk-crypto-js@^0.1.0":
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/@matrix-org/matrix-sdk-crypto-js/-/matrix-sdk-crypto-js-0.1.0.tgz#766580036d4df12120ded223e13b5640e77db136"
   integrity sha512-ra/bcFdleC1iRNms2I96UXA0NvQYWpMsHrV5EfJRS7qV1PtnQNvgsvMfjMbkx8QT2ErEmIhsvB5fPCpfp8BSuw==