diff --git a/src/matrix/SessionContainer.js b/src/matrix/SessionContainer.js
index 6e9d190c..44d7b3e4 100644
--- a/src/matrix/SessionContainer.js
+++ b/src/matrix/SessionContainer.js
@@ -26,9 +26,9 @@ import {MediaRepository} from "./net/MediaRepository.js";
 import {RequestScheduler} from "./net/RequestScheduler.js";
 import {Sync, SyncStatus} from "./Sync.js";
 import {Session} from "./Session.js";
-import {PasswordLoginMethod} from "./login/PasswordLoginMethod.js";
-import {TokenLoginMethod} from "./login/TokenLoginMethod.js";
-import {SSOLoginHelper} from "./login/SSOLoginHelper.js";
+import {PasswordLoginMethod} from "./login/PasswordLoginMethod";
+import {TokenLoginMethod} from "./login/TokenLoginMethod";
+import {SSOLoginHelper} from "./login/SSOLoginHelper";
 import {getDehydratedDevice} from "./e2ee/Dehydration.js";
 
 export const LoadStatus = createEnum(
diff --git a/src/matrix/login/LoginMethod.js b/src/matrix/login/LoginMethod.ts
similarity index 61%
rename from src/matrix/login/LoginMethod.js
rename to src/matrix/login/LoginMethod.ts
index ece18871..2b2a8ff3 100644
--- a/src/matrix/login/LoginMethod.js
+++ b/src/matrix/login/LoginMethod.ts
@@ -14,17 +14,10 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-export class LoginMethod {
-    constructor({homeserver}) {
-        this.homeserver = homeserver;
-    }
+import type {ILogItem} from "../../logging/types";
+import type {HomeServerApi} from "../net/HomeServerApi.js";
 
-    // eslint-disable-next-line no-unused-vars
-    async login(hsApi, deviceName, log) {
-        /*
-        Regardless of the login method, SessionContainer.startWithLogin()
-        can do SomeLoginMethod.login()
-        */
-        throw("Not Implemented");
-    }
+export interface ILoginMethod {
+    homeserver: string;
+    login(hsApi: HomeServerApi, deviceName: string, log: ILogItem): Promise<Record<string, any>>;
 }
diff --git a/src/matrix/login/PasswordLoginMethod.js b/src/matrix/login/PasswordLoginMethod.js
deleted file mode 100644
index 5c90ccf8..00000000
--- a/src/matrix/login/PasswordLoginMethod.js
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
-Copyright 2021 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import {LoginMethod} from "./LoginMethod.js";
-
-export class PasswordLoginMethod extends LoginMethod {
-    constructor(options) {
-        super(options);
-        this.username = options.username;
-        this.password = options.password;
-    }
-
-    async login(hsApi, deviceName, log) {
-        return await hsApi.passwordLogin(this.username, this.password, deviceName, {log}).response();
-    }
-}
diff --git a/src/matrix/login/PasswordLoginMethod.ts b/src/matrix/login/PasswordLoginMethod.ts
new file mode 100644
index 00000000..65e96ff0
--- /dev/null
+++ b/src/matrix/login/PasswordLoginMethod.ts
@@ -0,0 +1,35 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {ILogItem} from "../../logging/types";
+import {ILoginMethod} from "./LoginMethod";
+import {HomeServerApi} from "../net/HomeServerApi.js";
+
+export class PasswordLoginMethod implements ILoginMethod {
+    private readonly _username: string;
+    private readonly _password: string;
+    public readonly homeserver: string;
+
+    constructor({username, password, homeserver}: {username: string, password: string, homeserver: string}) {
+        this._username = username;
+        this._password = password;
+        this.homeserver = homeserver;
+    }
+
+    async login(hsApi: HomeServerApi, deviceName: string, log: ILogItem): Promise<Record<string, any>> {
+        return await hsApi.passwordLogin(this._username, this._password, deviceName, {log}).response();
+    }
+}
diff --git a/src/matrix/login/SSOLoginHelper.js b/src/matrix/login/SSOLoginHelper.ts
similarity index 80%
rename from src/matrix/login/SSOLoginHelper.js
rename to src/matrix/login/SSOLoginHelper.ts
index a15c8ef9..0fe3d6b8 100644
--- a/src/matrix/login/SSOLoginHelper.js
+++ b/src/matrix/login/SSOLoginHelper.ts
@@ -15,13 +15,15 @@ limitations under the License.
 */
 
 export class SSOLoginHelper{
-    constructor(homeserver) {
+    private _homeserver: string;
+
+    constructor(homeserver: string) {
         this._homeserver = homeserver;
     }
 
-    get homeserver() { return this._homeserver; }
+    get homeserver(): string { return this._homeserver; }
 
-    createSSORedirectURL(returnURL) {
+    createSSORedirectURL(returnURL: string): string {
         return `${this._homeserver}/_matrix/client/r0/login/sso/redirect?redirectUrl=${returnURL}`;
     }
 }
diff --git a/src/matrix/login/TokenLoginMethod.js b/src/matrix/login/TokenLoginMethod.ts
similarity index 57%
rename from src/matrix/login/TokenLoginMethod.js
rename to src/matrix/login/TokenLoginMethod.ts
index e55cedcf..4f1e3cc7 100644
--- a/src/matrix/login/TokenLoginMethod.js
+++ b/src/matrix/login/TokenLoginMethod.ts
@@ -14,16 +14,21 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {LoginMethod} from "./LoginMethod.js";
 import {makeTxnId} from "../common.js";
+import {ILogItem} from "../../logging/types";
+import {ILoginMethod} from "./LoginMethod";
+import {HomeServerApi} from "../net/HomeServerApi.js";
 
-export class TokenLoginMethod extends LoginMethod {
-    constructor(options) {
-        super(options);
-        this._loginToken = options.loginToken;
+export class TokenLoginMethod implements ILoginMethod {
+    private readonly _loginToken: string;
+    public readonly homeserver: string;
+
+    constructor({ homeserver, loginToken }: { homeserver: string, loginToken: string}) {
+        this.homeserver = homeserver;
+        this._loginToken = loginToken;
     }
 
-    async login(hsApi, deviceName, log) {
+    async login(hsApi: HomeServerApi, deviceName: string, log: ILogItem): Promise<Record<string, any>> {
         return await hsApi.tokenLogin(this._loginToken, makeTxnId(), deviceName, {log}).response();
     }
 }