Split browser workflows from presentation

web/src/transport.ts

@@ -145,6 +145,24 @@ export class BrowserProductClient implements ProductEndpoint {
     );
   }
 
+  async logout(csrfToken: string): Promise<void> {
+    const response = await this.fetchRequest(
+      this.baseUrl === '' ? '/logout' : new URL('/logout', this.baseUrl),
+      {
+        method: 'POST',
+        credentials: 'same-origin',
+        headers: { 'X-CSRF-Token': csrfToken }
+      }
+    );
+    if (!response.ok) {
+      throw new ProductRequestError({
+        kind: 'unexpected-http',
+        status: response.status,
+        message: response.statusText
+      });
+    }
+  }
+
   private async jsonRequest<Success, Code extends string>(
     contract: EndpointContract,
     request: object,