diff --git a/src/domain/session/room/timeline/ReactionsViewModel.js b/src/domain/session/room/timeline/ReactionsViewModel.js
index 25d74b49..3a47aaa0 100644
--- a/src/domain/session/room/timeline/ReactionsViewModel.js
+++ b/src/domain/session/room/timeline/ReactionsViewModel.js
@@ -184,7 +184,7 @@ import {Clock as MockClock} from "../../../../mocks/Clock.js";
 import {createMockStorage} from "../../../../mocks/Storage";
 import {ListObserver} from "../../../../mocks/ListObserver.js";
 import {createEvent, withTextBody, withContent} from "../../../../mocks/event.js";
-import {NullLogItem, NullLogger} from "../../../../logging/NullLogger.js";
+import {NullLogItem, NullLogger} from "../../../../logging/NullLogger";
 import {HomeServer as MockHomeServer} from "../../../../mocks/HomeServer.js";
 // other imports
 import {BaseMessageTile} from "./tiles/BaseMessageTile.js";
diff --git a/src/logging/BaseLogger.ts b/src/logging/BaseLogger.ts
index 9865355a..e420c0df 100644
--- a/src/logging/BaseLogger.ts
+++ b/src/logging/BaseLogger.ts
@@ -17,14 +17,14 @@ limitations under the License.
 
 import {LogItem} from "./LogItem";
 import {LogLevel, LogFilter} from "./LogFilter";
-import type {FilterCreator, LabelOrValues, LogCallback} from "./LogItem";
+import type {FilterCreator, LabelOrValues, LogCallback, ILogItem} from "./LogItem";
 import type {LogLevelOrNull} from "./LogFilter";
 // todo: should this import be here just for getting the type? should it instead be done when Platform.js --> Platform.ts?
 import type {Platform} from "../platform/web/Platform.js";
 
 
 export abstract class BaseLogger {
-    protected _openItems: Set<LogItem> = new Set();
+    protected _openItems: Set<ILogItem> = new Set();
     protected _platform: Platform;
 
     constructor({platform}) {
@@ -38,7 +38,7 @@ export abstract class BaseLogger {
     }
 
     /** if item is a log item, wrap the callback in a child of it, otherwise start a new root log item. */
-    wrapOrRun(item: LogItem, labelOrValues: LabelOrValues, callback: LogCallback, logLevel: LogLevelOrNull = null, filterCreator: FilterCreator = null): unknown {
+    wrapOrRun(item: ILogItem, labelOrValues: LabelOrValues, callback: LogCallback, logLevel: LogLevelOrNull = null, filterCreator: FilterCreator = null): unknown {
         if (item) {
             return item.wrap(labelOrValues, callback, logLevel, filterCreator);
         } else {
@@ -51,7 +51,7 @@ export abstract class BaseLogger {
     Useful to pair with LogItem.refDetached.
 
     @return {LogItem} the log item added, useful to pass to LogItem.refDetached */
-    runDetached(labelOrValues: LabelOrValues, callback: LogCallback, logLevel: LogLevelOrNull = null, filterCreator: FilterCreator = null): LogItem {
+    runDetached(labelOrValues: LabelOrValues, callback: LogCallback, logLevel: LogLevelOrNull = null, filterCreator: FilterCreator = null): ILogItem {
         // todo: Remove jsdoc type?
         if (logLevel === null) {
             logLevel = LogLevel.Info;
@@ -72,7 +72,7 @@ export abstract class BaseLogger {
         return this._run(item, callback, logLevel!, filterCreator, true);
     }
 
-    _run(item: LogItem, callback: LogCallback, logLevel: LogLevel, filterCreator: FilterCreator, shouldThrow: boolean): unknown {
+    _run(item: ILogItem, callback: LogCallback, logLevel: LogLevel, filterCreator: FilterCreator, shouldThrow: boolean): unknown {
         this._openItems.add(item);
 
         const finishItem = () => {
@@ -135,7 +135,7 @@ export abstract class BaseLogger {
         this._openItems.clear();
     }
 
-    abstract _persistItem(item: LogItem, filter?: LogFilter, forced?: boolean): void;
+    abstract _persistItem(item: ILogItem, filter?: LogFilter, forced?: boolean): void;
 
     abstract export(): void;
 
diff --git a/src/logging/ConsoleLogger.ts b/src/logging/ConsoleLogger.ts
index 5b709bb1..d8693e38 100644
--- a/src/logging/ConsoleLogger.ts
+++ b/src/logging/ConsoleLogger.ts
@@ -14,10 +14,10 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 import {BaseLogger} from "./BaseLogger";
-import type {LogItem, LogItemValues} from "./LogItem";
+import type {ILogItem, LogItemValues} from "./LogItem";
 
 export class ConsoleLogger extends BaseLogger {
-    _persistItem(item: LogItem): void {
+    _persistItem(item: ILogItem): void {
         printToConsole(item);
     }
 
@@ -41,7 +41,7 @@ function filterValues(values: LogItemValues): LogItemValues | null {
         }, null);
 }
 
-function printToConsole(item: LogItem): void {
+function printToConsole(item: ILogItem): void {
     const label = `${itemCaption(item)} (${item.duration}ms)`;
     const filteredValues = filterValues(item.values);
     const shouldGroup = item.children || filteredValues;
@@ -74,7 +74,7 @@ function printToConsole(item: LogItem): void {
     }
 }
 
-function itemCaption(item: LogItem): string {
+function itemCaption(item: ILogItem): string {
     if (item.values.t === "network") {
         return `${item.values.method} ${item.values.url}`;
     } else if (item.values.l && typeof item.values.id !== "undefined") {
diff --git a/src/logging/IDBLogger.ts b/src/logging/IDBLogger.ts
index 3283dd0d..960db0da 100644
--- a/src/logging/IDBLogger.ts
+++ b/src/logging/IDBLogger.ts
@@ -26,7 +26,7 @@ import {BaseLogger} from "./BaseLogger";
 import type {Interval} from "../platform/web/dom/Clock";
 import type {Platform} from "../platform/web/Platform.js";
 import type {BlobHandle} from "../platform/web/dom/BlobHandle.js";
-import type {LogItem} from "./LogItem";
+import type {ILogItem} from "./LogItem";
 import type {LogFilter} from "./LogFilter";
 
 type QueuedItem = {
@@ -116,8 +116,8 @@ export class IDBLogger extends BaseLogger {
         return openDatabase(this._name, db => db.createObjectStore("logs", {keyPath: "id", autoIncrement: true}), 1);
     }
     
-    _persistItem(logItem: LogItem, filter: LogFilter, forced: boolean): void {
-        const serializedItem = logItem.serialize(filter, undefined, forced);
+    _persistItem(logItem: ILogItem, filter: LogFilter, forced: boolean): void {
+        const serializedItem = logItem.serialize(filter, null, forced);
         this._queuedItems.push({
             json: JSON.stringify(serializedItem)
         });
diff --git a/src/logging/LogFilter.ts b/src/logging/LogFilter.ts
index 480e92db..dc415ede 100644
--- a/src/logging/LogFilter.ts
+++ b/src/logging/LogFilter.ts
@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import type {LogItem} from "./LogItem";
+import type {ILogItem} from "./LogItem";
 
 export enum LogLevel {
     All = 1,
@@ -37,7 +37,7 @@ export class LogFilter {
         this._parentFilter = parentFilter;
     }
 
-    filter(item: LogItem, children: Array<unknown> | null): boolean {
+    filter(item: ILogItem, children: Array<unknown> | null): boolean {
         if (this._parentFilter) {
             if (!this._parentFilter.filter(item, children)) {
                 return false;
diff --git a/src/logging/LogItem.ts b/src/logging/LogItem.ts
index 051b0353..54957347 100644
--- a/src/logging/LogItem.ts
+++ b/src/logging/LogItem.ts
@@ -33,6 +33,30 @@ interface ISerializedItem {
     c?: Array<ISerializedItem>;
 };
 
+export interface ILogItem {
+    logger: any;
+    level: typeof LogLevel;
+    duration?: number;
+    end?: number | null;
+    start?: number;
+    logLevel: LogLevel;
+    children: Array<ILogItem> | null;
+    values: LogItemValues;
+    error: Error | null;
+    wrap(labelOrValues: LabelOrValues, callback: LogCallback, level: LogLevelOrNull, filterCreator: FilterCreator): unknown;
+    log(labelOrValues: LabelOrValues, logLevel: LogLevelOrNull): void;
+    set(key: string | object, value: unknown): void;
+    run(callback: LogCallback): unknown;
+    runDetached(labelOrValues: LabelOrValues, callback: LogCallback, logLevel: LogLevelOrNull, filterCreator: FilterCreator): ILogItem;
+    wrapDetached(labelOrValues: LabelOrValues, callback: LogCallback, logLevel: LogLevelOrNull, filterCreator: FilterCreator): void;
+    refDetached(logItem: ILogItem, logLevel: LogLevelOrNull): void;
+    ensureRefId(): void;
+    catch(err: Error): Error;
+    finish(): void;
+    child(labelOrValues: LabelOrValues, logLevel: LogLevelOrNull, filterCreator: FilterCreator): ILogItem;
+    serialize(filter: LogFilter, parentStartTime: number | null, forced: boolean): ISerializedItem | null;
+}
+
 export type LogItemValues = {
     l?: string;
     t?: string;
@@ -44,10 +68,10 @@ export type LogItemValues = {
 }
 
 export type LabelOrValues = string | LogItemValues;
-export type FilterCreator = ((filter: LogFilter, item: LogItem) => LogFilter) | null;
-export type LogCallback = (item: LogItem) => unknown;
+export type FilterCreator = ((filter: LogFilter, item: ILogItem) => LogFilter) | null;
+export type LogCallback = (item: ILogItem) => unknown;
 
-export class LogItem {
+export class LogItem implements ILogItem {
     public readonly start: number;
     public logLevel: LogLevel;
     public error: Error | null;
@@ -70,7 +94,7 @@ export class LogItem {
     }
 
     /** start a new root log item and run it detached mode, see BaseLogger.runDetached */
-    runDetached(labelOrValues: LabelOrValues, callback: LogCallback, logLevel: LogLevelOrNull, filterCreator: FilterCreator): LogItem {
+    runDetached(labelOrValues: LabelOrValues, callback: LogCallback, logLevel: LogLevelOrNull, filterCreator: FilterCreator): ILogItem {
         return this._logger.runDetached(labelOrValues, callback, logLevel, filterCreator);
     }
 
@@ -81,9 +105,9 @@ export class LogItem {
 
     /** logs a reference to a different log item, usually obtained from runDetached.
     This is useful if the referenced operation can't be awaited. */
-    refDetached(logItem: LogItem, logLevel: LogLevelOrNull = null): void {
+    refDetached(logItem: ILogItem, logLevel: LogLevelOrNull = null): void {
         logItem.ensureRefId();
-        this.log({ref: logItem._values.refId as number}, logLevel);
+        this.log({ref: (logItem as LogItem)._values.refId}, logLevel);
     }
 
     ensureRefId(): void {
@@ -267,7 +291,7 @@ export class LogItem {
         return err;
     }
 
-    child(labelOrValues: LabelOrValues, logLevel: LogLevelOrNull, filterCreator: FilterCreator): LogItem {
+    child(labelOrValues: LabelOrValues, logLevel: LogLevelOrNull, filterCreator: FilterCreator): ILogItem {
         if (this.end !== null) {
             console.trace("log item is finished, additional logs will likely not be recorded");
         }
diff --git a/src/logging/NullLogger.js b/src/logging/NullLogger.ts
similarity index 57%
rename from src/logging/NullLogger.js
rename to src/logging/NullLogger.ts
index 12eec5c9..285ea1e4 100644
--- a/src/logging/NullLogger.js
+++ b/src/logging/NullLogger.ts
@@ -14,18 +14,17 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 import {LogLevel} from "./LogFilter";
+import type {ILogItem, LabelOrValues, LogCallback, LogItemValues} from "./LogItem";
 
-function noop () {}
+function noop (): void {}
 
 
 export class NullLogger {
-    constructor() {
-        this.item = new NullLogItem(this);
-    }
+    public readonly item: ILogItem = new NullLogItem(this);
 
-    log() {}
+    log(): void {}
 
-    run(_, callback) {
+    run(_: null, callback) {
         return callback(this.item);    
     }
 
@@ -50,50 +49,61 @@ export class NullLogger {
     }
 }
 
-export class NullLogItem {
-    constructor(logger) {
+export class NullLogItem implements ILogItem {
+    public readonly logger: NullLogger;
+    public readonly logLevel: LogLevel;
+    public children: Array<ILogItem> | null = null;
+    public values: LogItemValues;
+    public error: Error | null = null;
+
+    constructor(logger: NullLogger) {
         this.logger = logger;
     }
 
-    wrap(_, callback) {
+    wrap(_: LabelOrValues, callback: LogCallback): unknown {
         return callback(this);
     }
-    log() {}
-    set() {}
+    log(): void {}
+    set(): void {}
 
-    runDetached(_, callback) {
+    runDetached(_: LabelOrValues, callback: LogCallback): ILogItem {
         new Promise(r => r(callback(this))).then(noop, noop);
-    }
-
-    wrapDetached(_, callback) {
-        return this.refDetached(null, callback);
-    }
-
-    run(callback) {
-        return callback(this);
-    }
-
-    refDetached() {}
-
-    ensureRefId() {}
-
-    get level() {
-        return LogLevel;
-    }
-
-    get duration() {
-        return 0;
-    }
-
-    catch(err) {
-        return err;
-    }
-
-    child() {
         return this;
     }
 
-    finish() {}
+    wrapDetached(_: LabelOrValues, _callback: LogCallback): void {
+        return this.refDetached();
+    }
+
+    run(callback: LogCallback): unknown {
+        return callback(this);
+    }
+
+    refDetached(): void {}
+
+    ensureRefId(): void {}
+
+    get level(): typeof LogLevel {
+        return LogLevel;
+    }
+
+    get duration(): 0 {
+        return 0;
+    }
+
+    catch(err: Error): Error {
+        return err;
+    }
+
+    child()  {
+        return this;
+    }
+
+    finish(): void {}
+
+    serialize() {
+        return null;
+    }
 }
 
 export const Instance = new NullLogger(); 
diff --git a/src/logging/utils.js b/src/logging/utils.js
index 3da9aa5d..659df055 100644
--- a/src/logging/utils.js
+++ b/src/logging/utils.js
@@ -1,7 +1,7 @@
 // these are helper functions if you can't assume you always have a log item (e.g. some code paths call with one set, others don't)
 // if you know you always have a log item, better to use the methods on the log item than these utility functions.
 
-import {Instance as NullLoggerInstance} from "./NullLogger.js";
+import {Instance as NullLoggerInstance} from "./NullLogger";
 
 export function wrapOrRunNullLogger(logItem, labelOrValues, callback, logLevel = null, filterCreator = null) {
     if (logItem) {
diff --git a/src/matrix/e2ee/megolm/Decryption.ts b/src/matrix/e2ee/megolm/Decryption.ts
index 842d423d..4cb66971 100644
--- a/src/matrix/e2ee/megolm/Decryption.ts
+++ b/src/matrix/e2ee/megolm/Decryption.ts
@@ -26,7 +26,7 @@ import type {OlmWorker} from "../OlmWorker";
 import type {Transaction} from "../../storage/idb/Transaction";
 import type {TimelineEvent} from "../../storage/types";
 import type {DecryptionResult} from "../DecryptionResult";
-import type {LogItem} from "../../../logging/LogItem";
+import type {ILogItem} from "../../../logging/LogItem";
 
 export class Decryption {
     private keyLoader: KeyLoader;
@@ -136,7 +136,7 @@ export class Decryption {
      * Extracts room keys from decrypted device messages.
      * The key won't be persisted yet, you need to call RoomKey.write for that.
      */
-    roomKeysFromDeviceMessages(decryptionResults: DecryptionResult[], log: LogItem): IncomingRoomKey[] {
+    roomKeysFromDeviceMessages(decryptionResults: DecryptionResult[], log: ILogItem): IncomingRoomKey[] {
         const keys: IncomingRoomKey[] = [];
         for (const dr of decryptionResults) {
             if (dr.event?.type !== "m.room_key" || dr.event.content?.algorithm !== MEGOLM_ALGORITHM) {
@@ -152,7 +152,7 @@ export class Decryption {
                     log.logLevel = log.level.Warn;
                     log.set("invalid", true);
                 }
-            }, log.level.Detail);
+            }, log.level.Detail, null);
         }
         return keys;
     }
diff --git a/src/matrix/room/Invite.js b/src/matrix/room/Invite.js
index 1bf802dd..da721c77 100644
--- a/src/matrix/room/Invite.js
+++ b/src/matrix/room/Invite.js
@@ -244,7 +244,7 @@ export class Invite extends EventEmitter {
     }
 }
 
-import {NullLogItem} from "../../logging/NullLogger.js";
+import {NullLogItem} from "../../logging/NullLogger";
 import {Clock as MockClock} from "../../mocks/Clock.js";
 import {default as roomInviteFixture} from "../../fixtures/matrix/invites/room.js";
 import {default as dmInviteFixture} from "../../fixtures/matrix/invites/dm.js";
diff --git a/src/matrix/room/sending/SendQueue.js b/src/matrix/room/sending/SendQueue.js
index 28408e34..896100c7 100644
--- a/src/matrix/room/sending/SendQueue.js
+++ b/src/matrix/room/sending/SendQueue.js
@@ -353,7 +353,7 @@ export class SendQueue {
 import {HomeServer as MockHomeServer} from "../../../mocks/HomeServer.js";
 import {createMockStorage} from "../../../mocks/Storage";
 import {ListObserver} from "../../../mocks/ListObserver.js";
-import {NullLogger, NullLogItem} from "../../../logging/NullLogger.js";
+import {NullLogger, NullLogItem} from "../../../logging/NullLogger";
 import {createEvent, withTextBody, withTxnId} from "../../../mocks/event.js";
 import {poll} from "../../../mocks/poll.js";
 import {createAnnotation} from "../timeline/relations.js";
diff --git a/src/matrix/room/timeline/Timeline.js b/src/matrix/room/timeline/Timeline.js
index 4e6fe40c..bd89ee8d 100644
--- a/src/matrix/room/timeline/Timeline.js
+++ b/src/matrix/room/timeline/Timeline.js
@@ -346,7 +346,7 @@ import {Clock as MockClock} from "../../../mocks/Clock.js";
 import {createMockStorage} from "../../../mocks/Storage";
 import {ListObserver} from "../../../mocks/ListObserver.js";
 import {createEvent, withTextBody, withContent, withSender} from "../../../mocks/event.js";
-import {NullLogItem} from "../../../logging/NullLogger.js";
+import {NullLogItem} from "../../../logging/NullLogger";
 import {EventEntry} from "./entries/EventEntry.js";
 import {User} from "../../User.js";
 import {PendingEvent} from "../sending/PendingEvent.js";
diff --git a/src/matrix/room/timeline/persistence/GapWriter.js b/src/matrix/room/timeline/persistence/GapWriter.js
index 7794b797..3e520608 100644
--- a/src/matrix/room/timeline/persistence/GapWriter.js
+++ b/src/matrix/room/timeline/persistence/GapWriter.js
@@ -205,7 +205,7 @@ import {FragmentIdComparer} from "../FragmentIdComparer.js";
 import {RelationWriter} from "./RelationWriter.js";
 import {createMockStorage} from "../../../../mocks/Storage";
 import {FragmentBoundaryEntry} from "../entries/FragmentBoundaryEntry.js";
-import {NullLogItem} from "../../../../logging/NullLogger.js";
+import {NullLogItem} from "../../../../logging/NullLogger";
 import {TimelineMock, eventIds, eventId} from "../../../../mocks/TimelineMock.ts";
 import {SyncWriter} from "./SyncWriter.js";
 import {MemberWriter} from "./MemberWriter.js";
diff --git a/src/matrix/room/timeline/persistence/RelationWriter.js b/src/matrix/room/timeline/persistence/RelationWriter.js
index c0d3d369..60a2b618 100644
--- a/src/matrix/room/timeline/persistence/RelationWriter.js
+++ b/src/matrix/room/timeline/persistence/RelationWriter.js
@@ -257,7 +257,7 @@ import {createMockStorage} from "../../../../mocks/Storage";
 import {createEvent, withTextBody, withRedacts, withContent} from "../../../../mocks/event.js";
 import {createAnnotation} from "../relations.js";
 import {FragmentIdComparer} from "../FragmentIdComparer.js";
-import {NullLogItem} from "../../../../logging/NullLogger.js";
+import {NullLogItem} from "../../../../logging/NullLogger";
 
 export function tests() {
     const fragmentIdComparer = new FragmentIdComparer([]);
diff --git a/src/matrix/room/timeline/persistence/SyncWriter.js b/src/matrix/room/timeline/persistence/SyncWriter.js
index 749c3392..dc5ae3a8 100644
--- a/src/matrix/room/timeline/persistence/SyncWriter.js
+++ b/src/matrix/room/timeline/persistence/SyncWriter.js
@@ -258,7 +258,7 @@ export class SyncWriter {
 
 import {createMockStorage} from "../../../../mocks/Storage";
 import {createEvent, withTextBody} from "../../../../mocks/event.js";
-import {Instance as nullLogger} from "../../../../logging/NullLogger.js";
+import {Instance as nullLogger} from "../../../../logging/NullLogger";
 export function tests() {
     const roomId = "!abc:hs.tld";
     return {
diff --git a/src/matrix/storage/idb/QueryTarget.ts b/src/matrix/storage/idb/QueryTarget.ts
index 03fe66bc..7519beac 100644
--- a/src/matrix/storage/idb/QueryTarget.ts
+++ b/src/matrix/storage/idb/QueryTarget.ts
@@ -16,7 +16,7 @@ limitations under the License.
 
 import {iterateCursor, DONE, NOT_DONE, reqAsPromise} from "./utils";
 import {StorageError} from "../common";
-import {LogItem} from "../../../logging/LogItem";
+import {ILogItem} from "../../../logging/LogItem";
 import {IDBKey} from "./Transaction";
 
 // this is the part of the Transaction class API that is used here and in the Store subclass,
@@ -25,7 +25,7 @@ export interface ITransaction {
     idbFactory: IDBFactory;
     IDBKeyRange: typeof IDBKeyRange;
     databaseName: string;
-    addWriteError(error: StorageError, refItem: LogItem | undefined, operationName: string, keys: IDBKey[] | undefined);
+    addWriteError(error: StorageError, refItem: ILogItem | undefined, operationName: string, keys: IDBKey[] | undefined);
 }
 
 type Reducer<A,B> = (acc: B, val: A) => B
@@ -277,7 +277,7 @@ export function tests() {
 
     class MockTransaction extends MockIDBImpl {
         get databaseName(): string { return "mockdb"; }
-        addWriteError(error: StorageError, refItem: LogItem | undefined, operationName: string, keys: IDBKey[] | undefined) {}
+        addWriteError(error: StorageError, refItem: ILogItem | undefined, operationName: string, keys: IDBKey[] | undefined) {}
     }
 
     interface TestEntry {
diff --git a/src/matrix/storage/idb/StorageFactory.ts b/src/matrix/storage/idb/StorageFactory.ts
index f8cc192d..5ca6bce4 100644
--- a/src/matrix/storage/idb/StorageFactory.ts
+++ b/src/matrix/storage/idb/StorageFactory.ts
@@ -21,10 +21,10 @@ import { exportSession, importSession, Export } from "./export";
 import { schema } from "./schema";
 import { detectWebkitEarlyCloseTxnBug } from "./quirks";
 import { BaseLogger } from "../../../logging/BaseLogger";
-import { LogItem } from "../../../logging/LogItem";
+import { ILogItem } from "../../../logging/LogItem";
 
 const sessionName = (sessionId: string) => `hydrogen_session_${sessionId}`;
-const openDatabaseWithSessionId = function(sessionId: string, idbFactory: IDBFactory, localStorage: IDOMStorage, log: LogItem) {
+const openDatabaseWithSessionId = function(sessionId: string, idbFactory: IDBFactory, localStorage: IDOMStorage, log: ILogItem) {
     const create = (db, txn, oldVersion, version) => createStores(db, txn, oldVersion, version, localStorage, log);
     return openDatabase(sessionName(sessionId), create, schema.length, idbFactory);
 }
@@ -63,7 +63,7 @@ export class StorageFactory {
         this._localStorage = localStorage;
     }
 
-    async create(sessionId: string, log: LogItem): Promise<Storage> {
+    async create(sessionId: string, log: ILogItem): Promise<Storage> {
         await this._serviceWorkerHandler?.preventConcurrentSessionAccess(sessionId);
         requestPersistedStorage().then(persisted => {
             // Firefox lies here though, and returns true even if the user denied the request
@@ -83,23 +83,30 @@ export class StorageFactory {
         return reqAsPromise(req);
     }
 
-    async export(sessionId: string, log: LogItem): Promise<Export> {
+    async export(sessionId: string, log: ILogItem): Promise<Export> {
         const db = await openDatabaseWithSessionId(sessionId, this._idbFactory, this._localStorage, log);
         return await exportSession(db);
     }
 
-    async import(sessionId: string, data: Export, log: LogItem): Promise<void> {
+    async import(sessionId: string, data: Export, log: ILogItem): Promise<void> {
         const db = await openDatabaseWithSessionId(sessionId, this._idbFactory, this._localStorage, log);
         return await importSession(db, data);
     }
 }
 
-async function createStores(db: IDBDatabase, txn: IDBTransaction, oldVersion: number | null, version: number, localStorage: IDOMStorage, log: LogItem): Promise<void> {
+async function createStores(db: IDBDatabase, txn: IDBTransaction, oldVersion: number | null, version: number, localStorage: IDOMStorage, log: ILogItem): Promise<void> {
     const startIdx = oldVersion || 0;
-    return log.wrap({l: "storage migration", oldVersion, version}, async log => {
-        for(let i = startIdx; i < version; ++i) {
-            const migrationFunc = schema[i];
-            await log.wrap(`v${i + 1}`, log => migrationFunc(db, txn, localStorage, log));
-        }
-    }) as Promise<void>;
+    return log.wrap(
+        { l: "storage migration", oldVersion, version },
+        async (log) => {
+            for (let i = startIdx; i < version; ++i) {
+                const migrationFunc = schema[i];
+                await log.wrap(`v${i + 1}`, (log) =>
+                    migrationFunc(db, txn, localStorage, log), null, null
+                );
+            }
+        },
+        null,
+        null
+    ) as Promise<void>;
 }
diff --git a/src/matrix/storage/idb/Store.ts b/src/matrix/storage/idb/Store.ts
index 74de2afa..5a2a9abc 100644
--- a/src/matrix/storage/idb/Store.ts
+++ b/src/matrix/storage/idb/Store.ts
@@ -18,7 +18,7 @@ import {QueryTarget, IDBQuery, ITransaction} from "./QueryTarget";
 import {IDBRequestError, IDBRequestAttemptError} from "./error";
 import {reqAsPromise} from "./utils";
 import {Transaction, IDBKey} from "./Transaction";
-import {LogItem} from "../../../logging/LogItem";
+import {ILogItem} from "../../../logging/LogItem";
 
 const LOG_REQUESTS = false;
 
@@ -145,7 +145,7 @@ export class Store<T> extends QueryTarget<T> {
         return new QueryTarget<T>(new QueryTargetWrapper<T>(this._idbStore.index(indexName)), this._transaction);
     }
 
-    put(value: T, log?: LogItem): void {
+    put(value: T, log?: ILogItem): void {
         // If this request fails, the error will bubble up to the transaction and abort it,
         // which is the behaviour we want. Therefore, it is ok to not create a promise for this
         // request and await it.
@@ -160,13 +160,13 @@ export class Store<T> extends QueryTarget<T> {
         this._prepareErrorLog(request, log, "put", undefined, value);
     }
 
-    add(value: T, log?: LogItem): void {
+    add(value: T, log?: ILogItem): void {
         // ok to not monitor result of request, see comment in `put`.
         const request = this._idbStore.add(value);
         this._prepareErrorLog(request, log, "add", undefined, value);
     }
 
-    async tryAdd(value: T, log: LogItem): Promise<boolean> {
+    async tryAdd(value: T, log: ILogItem): Promise<boolean> {
         try {
             await reqAsPromise(this._idbStore.add(value));
             return true;
@@ -181,13 +181,13 @@ export class Store<T> extends QueryTarget<T> {
         }
     }
 
-    delete(keyOrKeyRange: IDBValidKey | IDBKeyRange, log?: LogItem): void {
+    delete(keyOrKeyRange: IDBValidKey | IDBKeyRange, log?: ILogItem): void {
         // ok to not monitor result of request, see comment in `put`.
         const request = this._idbStore.delete(keyOrKeyRange);
         this._prepareErrorLog(request, log, "delete", keyOrKeyRange, undefined);
     }
 
-    private _prepareErrorLog(request: IDBRequest, log: LogItem | undefined, operationName: string, key: IDBKey | undefined, value: T | undefined) {
+    private _prepareErrorLog(request: IDBRequest, log: ILogItem | undefined, operationName: string, key: IDBKey | undefined, value: T | undefined) {
         if (log) {
             log.ensureRefId();
         }
diff --git a/src/matrix/storage/idb/Transaction.ts b/src/matrix/storage/idb/Transaction.ts
index 0d9e55a5..721ee711 100644
--- a/src/matrix/storage/idb/Transaction.ts
+++ b/src/matrix/storage/idb/Transaction.ts
@@ -36,7 +36,7 @@ import {OutboundGroupSessionStore} from "./stores/OutboundGroupSessionStore";
 import {GroupSessionDecryptionStore} from "./stores/GroupSessionDecryptionStore";
 import {OperationStore} from "./stores/OperationStore";
 import {AccountDataStore} from "./stores/AccountDataStore";
-import {LogItem} from "../../../logging/LogItem";
+import {ILogItem} from "../../../logging/LogItem";
 import {BaseLogger} from "../../../logging/BaseLogger";
 
 export type IDBKey = IDBValidKey | IDBKeyRange;
@@ -44,7 +44,7 @@ export type IDBKey = IDBValidKey | IDBKeyRange;
 class WriteErrorInfo {
     constructor(
         public readonly error: StorageError,
-        public readonly refItem: LogItem | undefined,
+        public readonly refItem: ILogItem | undefined,
         public readonly operationName: string,
         public readonly keys: IDBKey[] | undefined,
     ) {}
@@ -169,7 +169,7 @@ export class Transaction {
         return this._store(StoreNames.accountData, idbStore => new AccountDataStore(idbStore));
     }
 
-    async complete(log?: LogItem): Promise<void> {
+    async complete(log?: ILogItem): Promise<void> {
         try {
             await txnAsPromise(this._txn);
         } catch (err) {
@@ -190,7 +190,7 @@ export class Transaction {
         return error;
     }
 
-    abort(log?: LogItem): void {
+    abort(log?: ILogItem): void {
         // TODO: should we wrap the exception in a StorageError?
         try {
             this._txn.abort();
@@ -202,14 +202,14 @@ export class Transaction {
         }
     }
 
-    addWriteError(error: StorageError, refItem: LogItem | undefined, operationName: string, keys: IDBKey[] | undefined) {
+    addWriteError(error: StorageError, refItem: ILogItem | undefined, operationName: string, keys: IDBKey[] | undefined) {
         // don't log subsequent `AbortError`s
         if (error.errcode !== "AbortError" || this._writeErrors.length === 0) {
             this._writeErrors.push(new WriteErrorInfo(error, refItem, operationName, keys));
         }
     }
 
-    private _logWriteErrors(parentItem: LogItem | undefined) {
+    private _logWriteErrors(parentItem: ILogItem | undefined) {
         const callback = errorGroupItem => {
             // we don't have context when there is no parentItem, so at least log stores
             if (!parentItem) {
@@ -226,7 +226,7 @@ export class Transaction {
         };
         const label = `${this._writeErrors.length} storage write operation(s) failed`;
         if (parentItem) {
-            parentItem.wrap(label, callback);
+            parentItem.wrap(label, callback, null, null);
         } else {
             this.logger.run(label, callback);
         }
diff --git a/src/matrix/storage/idb/schema.ts b/src/matrix/storage/idb/schema.ts
index a9c4e2e4..62a4cea1 100644
--- a/src/matrix/storage/idb/schema.ts
+++ b/src/matrix/storage/idb/schema.ts
@@ -11,10 +11,10 @@ import {SessionStore} from "./stores/SessionStore";
 import {Store} from "./Store";
 import {encodeScopeTypeKey} from "./stores/OperationStore";
 import {MAX_UNICODE} from "./stores/common";
-import {LogItem} from "../../../logging/LogItem";
+import {ILogItem} from "../../../logging/LogItem";
 
 
-export type MigrationFunc = (db: IDBDatabase, txn: IDBTransaction, localStorage: IDOMStorage, log: LogItem) => Promise<void> | void;
+export type MigrationFunc = (db: IDBDatabase, txn: IDBTransaction, localStorage: IDOMStorage, log: ILogItem) => Promise<void> | void;
 // FUNCTIONS SHOULD ONLY BE APPENDED!!
 // the index in the array is the database version
 export const schema: MigrationFunc[] = [
@@ -166,7 +166,7 @@ function createTimelineRelationsStore(db: IDBDatabase) : void {
 }
 
 //v11 doesn't change the schema, but ensures all userIdentities have all the roomIds they should (see #470)
-async function fixMissingRoomsInUserIdentities(db: IDBDatabase, txn: IDBTransaction, localStorage: IDOMStorage, log: LogItem) {
+async function fixMissingRoomsInUserIdentities(db: IDBDatabase, txn: IDBTransaction, localStorage: IDOMStorage, log: ILogItem) {
     const roomSummaryStore = txn.objectStore("roomSummary");
     const trackedRoomIds: string[] = [];
     await iterateCursor<SummaryData>(roomSummaryStore.openCursor(), roomSummary => {
@@ -196,7 +196,7 @@ async function fixMissingRoomsInUserIdentities(db: IDBDatabase, txn: IDBTransact
                 const updatedIdentity = addRoomToIdentity(identity, userId, roomId);
                 if (updatedIdentity) {
                     log.log({l: `fixing up`, id: userId,
-                        roomsBefore: originalRoomCount, roomsAfter: updatedIdentity.roomIds.length});
+                        roomsBefore: originalRoomCount, roomsAfter: updatedIdentity.roomIds.length}, null);
                     userIdentitiesStore.put(updatedIdentity);
                     foundMissing = true;
                 }
@@ -207,7 +207,7 @@ async function fixMissingRoomsInUserIdentities(db: IDBDatabase, txn: IDBTransact
                 // so we'll create a new one on the next message that will be properly shared
                 outboundGroupSessionsStore.delete(roomId);
             }
-        });
+        }, null, null);
     }
 }
 
@@ -220,7 +220,7 @@ async function changeSSSSKeyPrefix(db: IDBDatabase, txn: IDBTransaction) {
     }
 }
 // v13
-async function backupAndRestoreE2EEAccountToLocalStorage(db: IDBDatabase, txn: IDBTransaction, localStorage: IDOMStorage, log: LogItem) {
+async function backupAndRestoreE2EEAccountToLocalStorage(db: IDBDatabase, txn: IDBTransaction, localStorage: IDOMStorage, log: ILogItem) {
     const session = txn.objectStore("session");
     // the Store object gets passed in several things through the Transaction class (a wrapper around IDBTransaction),
     // the only thing we should need here is the databaseName though, so we mock it out.
diff --git a/src/matrix/storage/idb/stores/SessionStore.ts b/src/matrix/storage/idb/stores/SessionStore.ts
index 6bf87e9b..dd133b45 100644
--- a/src/matrix/storage/idb/stores/SessionStore.ts
+++ b/src/matrix/storage/idb/stores/SessionStore.ts
@@ -16,7 +16,7 @@ limitations under the License.
 import {Store} from "../Store";
 import {IDOMStorage} from "../types";
 import {SESSION_E2EE_KEY_PREFIX} from "../../../e2ee/common.js";
-import {LogItem} from "../../../../logging/LogItem";
+import {ILogItem} from "../../../../logging/LogItem";
 import {parse, stringify} from "../../../../utils/typedJSON";
 
 export interface SessionEntry {
@@ -64,7 +64,7 @@ export class SessionStore {
         });
     }
 
-    async tryRestoreE2EEIdentityFromLocalStorage(log: LogItem): Promise<boolean> {
+    async tryRestoreE2EEIdentityFromLocalStorage(log: ILogItem): Promise<boolean> {
         let success = false;
         const lsPrefix = this._localStorageKeyPrefix;
         const prefix = lsPrefix + SESSION_E2EE_KEY_PREFIX;
diff --git a/src/matrix/storage/idb/stores/TimelineEventStore.ts b/src/matrix/storage/idb/stores/TimelineEventStore.ts
index 3c101701..b3663c29 100644
--- a/src/matrix/storage/idb/stores/TimelineEventStore.ts
+++ b/src/matrix/storage/idb/stores/TimelineEventStore.ts
@@ -20,7 +20,7 @@ import { encodeUint32, decodeUint32 } from "../utils";
 import {KeyLimits} from "../../common";
 import {Store} from "../Store";
 import {TimelineEvent, StateEvent} from "../../types";
-import {LogItem} from "../../../../logging/LogItem";
+import {ILogItem} from "../../../../logging/LogItem";
 
 interface Annotation {
     count: number;
@@ -286,7 +286,7 @@ export class TimelineEventStore {
      * 
      * Returns if the event was not yet known and the entry was written.
      */
-    tryInsert(entry: TimelineEventEntry, log: LogItem): Promise<boolean> {
+    tryInsert(entry: TimelineEventEntry, log: ILogItem): Promise<boolean> {
         (entry as TimelineEventStorageEntry).key = encodeKey(entry.roomId, entry.fragmentId, entry.eventIndex);
         (entry as TimelineEventStorageEntry).eventIdKey = encodeEventIdKey(entry.roomId, entry.event.event_id);
         return this._timelineStore.tryAdd(entry as TimelineEventStorageEntry, log);
@@ -320,7 +320,7 @@ export class TimelineEventStore {
 import {createMockStorage} from "../../../../mocks/Storage";
 import {createEvent, withTextBody} from "../../../../mocks/event.js";
 import {createEventEntry} from "../../../room/timeline/persistence/common.js";
-import {Instance as logItem} from "../../../../logging/NullLogger.js";
+import {Instance as nullLogger} from "../../../../logging/NullLogger";
 
 export function tests() {
 
@@ -368,7 +368,7 @@ export function tests() {
             let eventKey = EventKey.defaultFragmentKey(109);
             for (const insertedId of insertedIds) {
                 const entry = createEventEntry(eventKey.nextKey(), roomId, createEventWithId(insertedId));
-                assert(await txn.timelineEvents.tryInsert(entry, logItem));
+                assert(await txn.timelineEvents.tryInsert(entry, nullLogger.item));
                 eventKey = eventKey.nextKey();
             }
             const eventKeyMap = await txn.timelineEvents.getEventKeysForIds(roomId, checkedIds);
diff --git a/src/mocks/Storage.ts b/src/mocks/Storage.ts
index 5dba796a..a5a30ffd 100644
--- a/src/mocks/Storage.ts
+++ b/src/mocks/Storage.ts
@@ -18,7 +18,7 @@ import {FDBFactory, FDBKeyRange} from "../../lib/fake-indexeddb/index.js";
 import {StorageFactory} from "../matrix/storage/idb/StorageFactory";
 import {IDOMStorage} from "../matrix/storage/idb/types";
 import {Storage} from "../matrix/storage/idb/Storage";
-import {Instance as nullLogger} from "../logging/NullLogger.js";
+import {Instance as nullLogger} from "../logging/NullLogger";
 import {openDatabase, CreateObjectStore} from "../matrix/storage/idb/utils";
 
 export function createMockStorage(): Promise<Storage> {