diff --git a/package.json b/package.json
index beb1c72..28093f7 100644
--- a/package.json
+++ b/package.json
@@ -27,11 +27,13 @@
 		"svelte": "^3.54.0",
 		"svelte-check": "^2.9.2",
 		"vite": "^4.0.0",
-		"vitest": "^0.25.3"
+		"vitest": "^0.25.8"
 	},
 	"type": "module",
 	"dependencies": {
 		"beercss": "^3.0.4",
+		"dexie": "^3.2.2",
+		"fake-indexeddb": "^4.0.1",
 		"material-dynamic-colors": "^0.1.5"
 	}
 }
diff --git a/src/lib/store/api.js b/src/lib/store/api.js
new file mode 100644
index 0000000..236a607
--- /dev/null
+++ b/src/lib/store/api.js
@@ -0,0 +1,32 @@
+import Dexie, { liveQuery } from 'dexie';
+import { writable } from 'svelte/store';
+
+const seedCampaign = {
+    battles: [],
+};
+
+export function genApi(options = {}) {
+    const storage = new Dexie('Campaigns', options.dexie ?? {});
+
+    storage.version(1).stores({
+        campaigns: '++id,name',
+    });
+
+    const campaigns = liveQuery(async () => {
+        const c = [];
+        await storage.campaigns
+            .toCollection()
+            .each(({ id, name }) => c.push({ id, name }));
+        return c;
+    });
+
+    return {
+        campaigns,
+        storage,
+        event: {
+            addCampaign: (name) =>
+                storage.campaigns.add({ name, ...seedCampaign }),
+            deleteCampaign: (id) => storage.campaigns.delete(id),
+        },
+    };
+}
diff --git a/src/lib/store/api.test.js b/src/lib/store/api.test.js
new file mode 100644
index 0000000..912295d
--- /dev/null
+++ b/src/lib/store/api.test.js
@@ -0,0 +1,28 @@
+import { test, expect } from 'vitest';
+//import { indexedDB, IDBKeyRange } from 'fake-indexeddb';
+import 'fake-indexeddb/auto';
+
+import { genApi } from './api.js';
+
+const get = async (store) => new Promise((resolve) => store.subscribe(resolve));
+
+test('create and add and remove campaigns', async () => {
+    const api = genApi(); //{ dexie: { indexedDB, IDBKeyRange } });
+
+    api.event.addCampaign('C1');
+    api.event.addCampaign('C2');
+
+    let result = await get(api.campaigns);
+
+    expect(result).toHaveLength(2);
+    expect(result[0]).toEqual({
+        id: 1,
+        name: 'C1',
+    });
+
+    api.event.deleteCampaign(1);
+
+    result = await get(api.campaigns);
+
+    expect(result).toHaveLength(1);
+});