diff --git a/lib/caching.ts b/lib/caching.ts
index 3ee20e1..b51afa0 100644
--- a/lib/caching.ts
+++ b/lib/caching.ts
@@ -10,7 +10,7 @@ async function initialFetch(options: { id: string }): Promise<Series | null> {
   if (!series) {
     return null;
   }
-  const stored = storage.write(series);
+  const stored = storage.writeSeries(series);
   if (!stored) {
     console.error(`Failed to store series ${options.id}`);
     return null;
@@ -50,7 +50,7 @@ async function updateFetch(existingSeries: Series): Promise<UpdatedSeries | Seri
     episodes: episodesSortedDescending,
   };
 
-  const updateSuccessful = await storage.write(updated);
+  const updateSuccessful = await storage.writeSeries(updated);
   if (!updateSuccessful) {
     console.log(`Failed to update series ${existingSeries.id}`);
     return null;
@@ -76,7 +76,7 @@ function isSeriesFromStorageNew(
 }
 
 async function getSeries(options: { id: string }): Promise<Series | null> {
-  const seriesFromStorage = await storage.read(options);
+  const seriesFromStorage = await storage.readSeries(options);
 
   /**
    * We don't have the feed in storage,
diff --git a/lib/storage.test.ts b/lib/storage.test.ts
index 602374f..214aee0 100644
--- a/lib/storage.test.ts
+++ b/lib/storage.test.ts
@@ -4,18 +4,18 @@ import { testUtils } from "./test-utils.ts";
 
 Deno.test("can store a series", async () => {
   const series = testUtils.generateSeries();
-  await storage.write(series);
+  await storage.writeSeries(series);
 
-  const readSeries = await storage.read(series);
+  const readSeries = await storage.readSeries(series);
 
   assertEquals(readSeries, series);
 });
 
 Deno.test("can retrieve a series", async () => {
   const series = testUtils.generateSeries();
-  await storage.write(series);
+  await storage.writeSeries(series);
 
-  const readSeries = await storage.read(series);
+  const readSeries = await storage.readSeries(series);
 
   assertEquals(readSeries, series);
 });
diff --git a/lib/storage.ts b/lib/storage.ts
index c90d0d6..b9fe4d3 100644
--- a/lib/storage.ts
+++ b/lib/storage.ts
@@ -18,26 +18,43 @@ export type Series = {
   episodes: Episode[];
 };
 
+export type VippsAgreement = {
+  id: string;
+  agreementId: string;
+  userEmail: string;
+  createdAt: Date;
+  revokedAt: Date | null;
+};
+
 const kv = await Deno.openKv();
 
-function seriesKey(series: { id: string }) {
-  return ["series", series.id];
+type Identifiable = { id: string };
+type Collection = "series" | "vipps-agreements";
+
+function read<T extends Identifiable>(collection: Collection) {
+  return async function (series: Identifiable) {
+    const key = [collection, series.id];
+    const read = await kv.get(key);
+    return read.value as T | null;
+  };
 }
 
-async function readSeries(options: { id: string }): Promise<Series | null> {
-  const { id } = options;
-  const key = seriesKey({ id });
-  const read = await kv.get<Series>(key);
-  return read.value;
+function write<T extends Identifiable>(collection: Collection) {
+  return async function (entity: T) {
+    const key = [collection, entity.id];
+    const stored = await kv.set(key, entity);
+    return stored.ok;
+  };
 }
 
-async function writeSeries(series: Series): Promise<boolean> {
-  const key = seriesKey(series);
-  const stored = await kv.set(key, series);
-  return stored.ok;
-}
+const readSeries = read<Series>("series");
+const writeSeries = write<Series>("series");
+const readVippsAgreement = read<VippsAgreement>("vipps-agreements");
+const writeVippsAgreement = write<VippsAgreement>("vipps-agreements");
 
 export const storage = {
   readSeries,
   writeSeries,
+  readVippsAgreement,
+  writeVippsAgreement,
 };