Referral Program Statuses (#1621)

Goader · web-flow · commit 75c8b01644ca · 2026-02-16T17:43:01.000+01:00
diff --git a/.changeset/brave-waves-flow.md b/.changeset/brave-waves-flow.md
@@ -0,0 +1,6 @@
+---
+"@namehash/ens-referrals": minor
+"ensapi": minor
+---
+
+Added `status` field to referral program API responses (`ReferrerLeaderboardPage`, `ReferrerEditionMetricsRanked`, `ReferrerEditionMetricsUnranked`) indicating whether a program is "Scheduled", "Active", or "Closed" based on the program's timing relative to `accurateAsOf`.
diff --git a/.changeset/clever-frogs-detect.md b/.changeset/clever-frogs-detect.md
@@ -0,0 +1,5 @@
+---
+"@ensnode/ensnode-sdk": minor
+---
+
+SWRCache `fn` now optionally receives the currently cached result as a parameter, allowing implementations to inspect cached data before deciding whether to return it or fetch fresh data. Fully backward compatible.
diff --git a/.changeset/lemon-moose-count.md b/.changeset/lemon-moose-count.md
@@ -0,0 +1,5 @@
+---
+"ensapi": minor
+---
+
+Referral program edition leaderboard caches now check for immutability within the cache builder function. Closed editions past the safety window return cached data without re-fetching.
diff --git a/apps/ensapi/src/cache/indexing-status.cache.ts b/apps/ensapi/src/cache/indexing-status.cache.ts
@@ -1,14 +1,19 @@
 import config from "@/config";
 
-import { ENSNodeClient, IndexingStatusResponseCodes, SWRCache } from "@ensnode/ensnode-sdk";
+import {
+  type CrossChainIndexingStatusSnapshot,
+  ENSNodeClient,
+  IndexingStatusResponseCodes,
+  SWRCache,
+} from "@ensnode/ensnode-sdk";
 
 import { makeLogger } from "@/lib/logger";
 
 const logger = makeLogger("indexing-status.cache");
 const client = new ENSNodeClient({ url: config.ensIndexerUrl });
 
-export const indexingStatusCache = new SWRCache({
-  fn: async () =>
+export const indexingStatusCache = new SWRCache<CrossChainIndexingStatusSnapshot>({
+  fn: async (_cachedResult) =>
     client
       .indexingStatus() // fetch a new indexing status snapshot
       .then((response) => {
diff --git a/apps/ensapi/src/cache/referral-leaderboard-editions.cache.ts b/apps/ensapi/src/cache/referral-leaderboard-editions.cache.ts
@@ -8,12 +8,14 @@ import {
 import { minutesToSeconds } from "date-fns";
 
 import {
+  type CachedResult,
   getLatestIndexedBlockRef,
   type OmnichainIndexingStatusId,
   OmnichainIndexingStatusIds,
   SWRCache,
 } from "@ensnode/ensnode-sdk";
 
+import { assumeReferralProgramEditionImmutablyClosed } from "@/lib/ensanalytics/referrer-leaderboard/closeout";
 import { getReferrerLeaderboard } from "@/lib/ensanalytics/referrer-leaderboard/get-referrer-leaderboard-v1";
 import { makeLogger } from "@/lib/logger";
 
@@ -48,15 +50,34 @@ const supportedOmnichainIndexingStatuses: OmnichainIndexingStatusId[] = [
 /**
  * Creates a cache builder function for a specific edition.
  *
+ * The builder function checks if cached data exists and represents an immutably closed edition.
+ * If so, it returns the cached data without re-fetching. Otherwise, it fetches fresh data.
+ *
  * @param editionConfig - The edition configuration
  * @returns A function that builds the leaderboard for the given edition
  */
 function createEditionLeaderboardBuilder(
   editionConfig: ReferralProgramEditionConfig,
-): () => Promise<ReferrerLeaderboard> {
-  return async (): Promise<ReferrerLeaderboard> => {
+): (cachedResult?: CachedResult<ReferrerLeaderboard>) => Promise<ReferrerLeaderboard> {
+  return async (cachedResult?: CachedResult<ReferrerLeaderboard>): Promise<ReferrerLeaderboard> => {
     const editionSlug = editionConfig.slug;
 
+    // Check if cached data is immutable and can be returned as-is
+    if (cachedResult && !(cachedResult.result instanceof Error)) {
+      const isImmutable = assumeReferralProgramEditionImmutablyClosed(
+        cachedResult.result.rules,
+        cachedResult.result.accurateAsOf,
+      );
+
+      if (isImmutable) {
+        logger.debug(
+          { editionSlug },
+          `Edition is immutably closed, returning cached data without re-fetching`,
+        );
+        return cachedResult.result;
+      }
+    }
+
     const indexingStatus = await indexingStatusCache.read();
     if (indexingStatus instanceof Error) {
       logger.error(
diff --git a/apps/ensapi/src/cache/referral-program-edition-set.cache.ts b/apps/ensapi/src/cache/referral-program-edition-set.cache.ts
@@ -7,7 +7,7 @@ import {
 } from "@namehash/ens-referrals/v1";
 import { minutesToSeconds } from "date-fns";
 
-import { SWRCache } from "@ensnode/ensnode-sdk";
+import { type CachedResult, SWRCache } from "@ensnode/ensnode-sdk";
 
 import { makeLogger } from "@/lib/logger";
 
@@ -16,7 +16,9 @@ const logger = makeLogger("referral-program-edition-set-cache");
 /**
  * Loads the referral program edition config set from custom URL or defaults.
  */
-async function loadReferralProgramEditionConfigSet(): Promise<ReferralProgramEditionConfigSet> {
+async function loadReferralProgramEditionConfigSet(
+  _cachedResult?: CachedResult<ReferralProgramEditionConfigSet>,
+): Promise<ReferralProgramEditionConfigSet> {
   // Check if custom URL is configured
   if (config.customReferralProgramEditionConfigSetUrl) {
     logger.info(
diff --git a/apps/ensapi/src/cache/referrer-leaderboard.cache.ts b/apps/ensapi/src/cache/referrer-leaderboard.cache.ts
@@ -6,6 +6,7 @@ import {
   ENS_HOLIDAY_AWARDS_MAX_QUALIFIED_REFERRERS,
   ENS_HOLIDAY_AWARDS_START_DATE,
   ENS_HOLIDAY_AWARDS_TOTAL_AWARD_POOL_VALUE,
+  type ReferrerLeaderboard,
 } from "@namehash/ens-referrals";
 import { minutesToSeconds } from "date-fns";
 
@@ -44,8 +45,8 @@ const supportedOmnichainIndexingStatuses: OmnichainIndexingStatusId[] = [
   OmnichainIndexingStatusIds.Completed,
 ];
 
-export const referrerLeaderboardCache = new SWRCache({
-  fn: async () => {
+export const referrerLeaderboardCache = new SWRCache<ReferrerLeaderboard>({
+  fn: async (_cachedResult) => {
     const indexingStatus = await indexingStatusCache.read();
     if (indexingStatus instanceof Error) {
       throw new Error(
diff --git a/apps/ensapi/src/handlers/ensanalytics-api-v1.test.ts b/apps/ensapi/src/handlers/ensanalytics-api-v1.test.ts
@@ -34,6 +34,7 @@ import {
   deserializeReferrerMetricsEditionsResponse,
   ReferralProgramEditionConfigSetResponseCodes,
   type ReferralProgramEditionSlug,
+  ReferralProgramStatuses,
   ReferrerEditionMetricsTypeIds,
   type ReferrerLeaderboard,
   ReferrerLeaderboardPageResponseCodes,
@@ -118,6 +119,7 @@ describe("/v1/ensanalytics", () => {
         responseCode: ReferrerLeaderboardPageResponseCodes.Ok,
         data: {
           ...populatedReferrerLeaderboard,
+          status: ReferralProgramStatuses.Active,
           pageContext: {
             endIndex: 9,
             hasNext: true,
@@ -139,6 +141,7 @@ describe("/v1/ensanalytics", () => {
         responseCode: ReferrerLeaderboardPageResponseCodes.Ok,
         data: {
           ...populatedReferrerLeaderboard,
+          status: ReferralProgramStatuses.Active,
           pageContext: {
             endIndex: 19,
             hasNext: true,
@@ -159,6 +162,7 @@ describe("/v1/ensanalytics", () => {
         responseCode: ReferrerLeaderboardPageResponseCodes.Ok,
         data: {
           ...populatedReferrerLeaderboard,
+          status: ReferralProgramStatuses.Active,
           pageContext: {
             endIndex: 28,
             hasNext: false,
@@ -223,6 +227,7 @@ describe("/v1/ensanalytics", () => {
         responseCode: ReferrerLeaderboardPageResponseCodes.Ok,
         data: {
           ...emptyReferralLeaderboard,
+          status: ReferralProgramStatuses.Active,
           pageContext: {
             hasNext: false,
             hasPrev: false,
@@ -364,13 +369,15 @@ describe("/v1/ensanalytics", () => {
             referrer: expectedMetrics,
             aggregatedMetrics: populatedReferrerLeaderboard.aggregatedMetrics,
             accurateAsOf: expectedAccurateAsOf,
+            status: ReferralProgramStatuses.Active,
           },
           "2026-03": {
             type: ReferrerEditionMetricsTypeIds.Ranked,
             rules: populatedReferrerLeaderboard.rules,
             referrer: expectedMetrics,
             aggregatedMetrics: populatedReferrerLeaderboard.aggregatedMetrics,
             accurateAsOf: expectedAccurateAsOf,
+            status: ReferralProgramStatuses.Active,
           },
         },
       } satisfies ReferrerMetricsEditionsResponseOk;
diff --git a/apps/ensapi/src/lib/ensanalytics/referrer-leaderboard/closeout.ts b/apps/ensapi/src/lib/ensanalytics/referrer-leaderboard/closeout.ts
@@ -0,0 +1,33 @@
+import type { ReferralProgramRules } from "@namehash/ens-referrals/v1";
+import { minutesToSeconds } from "date-fns";
+
+import { addDuration, type Duration, type UnixTimestamp } from "@ensnode/ensnode-sdk";
+
+/**
+ * Duration after which we assume a closed edition is safe from chain reorganizations.
+ *
+ * This is a heuristic value (10 minutes) chosen to provide a reasonable safety margin
+ * beyond typical chain finality assumptions on supported networks. It is not a guarantee
+ * of immutability.
+ */
+export const ASSUMED_CHAIN_REORG_SAFE_DURATION: Duration = minutesToSeconds(10);
+
+/**
+ * Assumes a referral program edition is immutably closed if it ended more than
+ * ASSUMED_CHAIN_REORG_SAFE_DURATION ago.
+ *
+ * This is a practical heuristic for determining when edition data can be cached
+ * indefinitely, based on the assumption that chain reorgs become extremely unlikely
+ * after the safety window has passed.
+ *
+ * @param rules - The referral program rules containing endTime
+ * @param referenceTime - The timestamp to check against (typically accurateAsOf from cached leaderboard)
+ * @returns true if we assume the edition is immutably closed
+ */
+export function assumeReferralProgramEditionImmutablyClosed(
+  rules: ReferralProgramRules,
+  referenceTime: UnixTimestamp,
+): boolean {
+  const immutabilityThreshold = addDuration(rules.endTime, ASSUMED_CHAIN_REORG_SAFE_DURATION);
+  return referenceTime > immutabilityThreshold;
+}
diff --git a/apps/ensapi/src/lib/ensanalytics/referrer-leaderboard/mocks-v1.ts b/apps/ensapi/src/lib/ensanalytics/referrer-leaderboard/mocks-v1.ts
@@ -1,4 +1,5 @@
 import {
+  ReferralProgramStatuses,
   type ReferrerLeaderboard,
   ReferrerLeaderboardPageResponseCodes,
   type ReferrerLeaderboardPageResponseOk,
@@ -1093,6 +1094,7 @@ export const referrerLeaderboardPageResponseOk: ReferrerLeaderboardPageResponseO
       startIndex: 0,
       endIndex: 28,
     },
+    status: ReferralProgramStatuses.Active,
     accurateAsOf: 1735689600,
   },
 };
diff --git a/apps/ensapi/src/middleware/referral-leaderboard-editions-caches.middleware.ts b/apps/ensapi/src/middleware/referral-leaderboard-editions-caches.middleware.ts
@@ -36,6 +36,9 @@ export type ReferralLeaderboardEditionsCachesMiddlewareVariables = {
  * This middleware depends on {@link referralProgramEditionConfigSetMiddleware} to provide
  * the edition config set. If the edition config set failed to load, this middleware propagates the error.
  * Otherwise, it initializes caches for each edition in the config set.
+ *
+ * Each cache's builder function handles immutability internally - when an edition becomes immutably
+ * closed (past the safety window), the builder returns previously cached data without re-fetching.
  */
 export const referralLeaderboardEditionsCachesMiddleware = factory.createMiddleware(
   async (c, next) => {
diff --git a/packages/ens-referrals/src/v1/api/serialize.ts b/packages/ens-referrals/src/v1/api/serialize.ts
@@ -118,6 +118,7 @@ function serializeReferrerLeaderboardPage(
     referrers: page.referrers.map(serializeAwardedReferrerMetrics),
     aggregatedMetrics: serializeAggregatedReferrerMetrics(page.aggregatedMetrics),
     pageContext: page.pageContext,
+    status: page.status,
     accurateAsOf: page.accurateAsOf,
   };
 }
@@ -133,6 +134,7 @@ function serializeReferrerEditionMetricsRanked(
     rules: serializeReferralProgramRules(detail.rules),
     referrer: serializeAwardedReferrerMetrics(detail.referrer),
     aggregatedMetrics: serializeAggregatedReferrerMetrics(detail.aggregatedMetrics),
+    status: detail.status,
     accurateAsOf: detail.accurateAsOf,
   };
 }
@@ -148,6 +150,7 @@ function serializeReferrerEditionMetricsUnranked(
     rules: serializeReferralProgramRules(detail.rules),
     referrer: serializeUnrankedReferrerMetrics(detail.referrer),
     aggregatedMetrics: serializeAggregatedReferrerMetrics(detail.aggregatedMetrics),
+    status: detail.status,
     accurateAsOf: detail.accurateAsOf,
   };
 }
diff --git a/packages/ens-referrals/src/v1/api/zod-schemas.ts b/packages/ens-referrals/src/v1/api/zod-schemas.ts
@@ -28,6 +28,7 @@ import {
   ReferrerEditionMetricsTypeIds,
 } from "../edition-metrics";
 import { REFERRERS_PER_LEADERBOARD_PAGE_MAX } from "../leaderboard-page";
+import { ReferralProgramStatuses } from "../status";
 import {
   MAX_EDITIONS_PER_REQUEST,
   ReferralProgramEditionConfigSetResponseCodes,
@@ -140,6 +141,13 @@ export const makeReferrerLeaderboardPageContextSchema = (
     endIndex: z.optional(makeNonNegativeIntegerSchema(`${valueLabel}.endIndex`)),
   });
 
+/**
+ * Schema for referral program status field.
+ * Validates that the status is one of: "Scheduled", "Active", or "Closed".
+ */
+export const makeReferralProgramStatusSchema = (_valueLabel: string = "status") =>
+  z.enum(ReferralProgramStatuses);
+
 /**
  * Schema for ReferrerLeaderboardPage
  */
@@ -149,6 +157,7 @@ export const makeReferrerLeaderboardPageSchema = (valueLabel: string = "Referrer
     referrers: z.array(makeAwardedReferrerMetricsSchema(`${valueLabel}.referrers[record]`)),
     aggregatedMetrics: makeAggregatedReferrerMetricsSchema(`${valueLabel}.aggregatedMetrics`),
     pageContext: makeReferrerLeaderboardPageContextSchema(`${valueLabel}.pageContext`),
+    status: makeReferralProgramStatusSchema(`${valueLabel}.status`),
     accurateAsOf: makeUnixTimestampSchema(`${valueLabel}.accurateAsOf`),
   });
 
@@ -197,6 +206,7 @@ export const makeReferrerEditionMetricsRankedSchema = (
     rules: makeReferralProgramRulesSchema(`${valueLabel}.rules`),
     referrer: makeAwardedReferrerMetricsSchema(`${valueLabel}.referrer`),
     aggregatedMetrics: makeAggregatedReferrerMetricsSchema(`${valueLabel}.aggregatedMetrics`),
+    status: makeReferralProgramStatusSchema(`${valueLabel}.status`),
     accurateAsOf: makeUnixTimestampSchema(`${valueLabel}.accurateAsOf`),
   });
 
@@ -211,6 +221,7 @@ export const makeReferrerEditionMetricsUnrankedSchema = (
     rules: makeReferralProgramRulesSchema(`${valueLabel}.rules`),
     referrer: makeUnrankedReferrerMetricsSchema(`${valueLabel}.referrer`),
     aggregatedMetrics: makeAggregatedReferrerMetricsSchema(`${valueLabel}.aggregatedMetrics`),
+    status: makeReferralProgramStatusSchema(`${valueLabel}.status`),
     accurateAsOf: makeUnixTimestampSchema(`${valueLabel}.accurateAsOf`),
   });
 
diff --git a/packages/ens-referrals/src/v1/edition-metrics.ts b/packages/ens-referrals/src/v1/edition-metrics.ts
@@ -10,6 +10,7 @@ import {
   type UnrankedReferrerMetrics,
 } from "./referrer-metrics";
 import type { ReferralProgramRules } from "./rules";
+import { calcReferralProgramStatus, type ReferralProgramStatusId } from "./status";
 
 /**
  * The type of referrer edition metrics data.
@@ -66,6 +67,12 @@ export interface ReferrerEditionMetricsRanked {
    */
   aggregatedMetrics: AggregatedReferrerMetrics;
 
+  /**
+   * The status of the referral program ("Scheduled", "Active", or "Closed")
+   * calculated based on the program's timing relative to {@link accurateAsOf}.
+   */
+  status: ReferralProgramStatusId;
+
   /**
    * The {@link UnixTimestamp} of when the data used to build the {@link ReferrerEditionMetricsRanked} was accurate as of.
    */
@@ -105,6 +112,12 @@ export interface ReferrerEditionMetricsUnranked {
    */
   aggregatedMetrics: AggregatedReferrerMetrics;
 
+  /**
+   * The status of the referral program ("Scheduled", "Active", or "Closed")
+   * calculated based on the program's timing relative to {@link accurateAsOf}.
+   */
+  status: ReferralProgramStatusId;
+
   /**
    * The {@link UnixTimestamp} of when the data used to build the {@link ReferrerEditionMetricsUnranked} was accurate as of.
    */
@@ -134,6 +147,7 @@ export const getReferrerEditionMetrics = (
   leaderboard: ReferrerLeaderboard,
 ): ReferrerEditionMetrics => {
   const awardedReferrerMetrics = leaderboard.referrers.get(referrer);
+  const status = calcReferralProgramStatus(leaderboard.rules, leaderboard.accurateAsOf);
 
   // If referrer is on the leaderboard, return their ranked metrics
   if (awardedReferrerMetrics) {
@@ -142,6 +156,7 @@ export const getReferrerEditionMetrics = (
       rules: leaderboard.rules,
       referrer: awardedReferrerMetrics,
       aggregatedMetrics: leaderboard.aggregatedMetrics,
+      status,
       accurateAsOf: leaderboard.accurateAsOf,
     };
   }
@@ -152,6 +167,7 @@ export const getReferrerEditionMetrics = (
     rules: leaderboard.rules,
     referrer: buildUnrankedReferrerMetrics(referrer),
     aggregatedMetrics: leaderboard.aggregatedMetrics,
+    status,
     accurateAsOf: leaderboard.accurateAsOf,
   };
 };
diff --git a/packages/ens-referrals/src/v1/leaderboard-page.ts b/packages/ens-referrals/src/v1/leaderboard-page.ts
diff --git a/packages/ensnode-sdk/src/shared/cache/swr-cache.test.ts b/packages/ensnode-sdk/src/shared/cache/swr-cache.test.ts
diff --git a/packages/ensnode-sdk/src/shared/cache/swr-cache.ts b/packages/ensnode-sdk/src/shared/cache/swr-cache.ts

-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +"@ensnode/ensnode-sdk": minor
 +---
++
 +SWRCache `fn` now optionally receives the currently cached result as a parameter, allowing implementations to inspect cached data before deciding whether to return it or fetch fresh data. Fully backward compatible.