From 10c25830fa9a98676f28d3241ad6ad90119f42cc Mon Sep 17 00:00:00 2001
From: sevenzing <lymarenko.lev@gmail.com>
Date: Thu, 4 Jun 2026 12:30:34 +0300
Subject: [PATCH 1/3] add multicall batching

---
 apps/ensapi/src/di.ts                | 13 ++++++-------
 apps/ensapi/src/lib/public-client.ts | 22 ++++++++++++++++++++++
 2 files changed, 28 insertions(+), 7 deletions(-)
 create mode 100644 apps/ensapi/src/lib/public-client.ts

diff --git a/apps/ensapi/src/di.ts b/apps/ensapi/src/di.ts
index 549af9500..10614dd2e 100644
--- a/apps/ensapi/src/di.ts
+++ b/apps/ensapi/src/di.ts
@@ -1,5 +1,5 @@
 import type { ChainId } from "enssdk";
-import { createPublicClient, fallback, http, type PublicClient } from "viem";
+import type { PublicClient } from "viem";
 
 import { type ENSNamespaceId, getENSRootChainId } from "@ensnode/datasources";
 import { type EnsDbConfig, EnsDbReader } from "@ensnode/ensdb-sdk";
@@ -18,6 +18,7 @@ import { buildConfigFromEnvironment, buildRootChainRpcConfig } from "@/config/co
 import { buildEnsDbConfigFromEnvironment } from "@/config/ensdb-config";
 import type { EnsApiEnvironment } from "@/config/environment";
 import { makeLogger } from "@/lib/logger";
+import { buildPublicClient } from "@/lib/public-client";
 
 const logger = makeLogger("di");
 
@@ -152,12 +153,10 @@ export function buildEnsApiDiContext(ensApiEnvironment: EnsApiEnvironment): EnsA
 
     get rootChainPublicClient(): PublicClient {
       if (instances.rootChainPublicClient === undefined) {
-        // Create an viem#PublicClient that uses a fallback() transport with all specified HTTP RPCs
-        instances.rootChainPublicClient = createPublicClient({
-          transport: fallback(
-            context.rootChainRpcConfig.httpRPCs.map((url) => http(url.toString())),
-          ),
-        });
+        instances.rootChainPublicClient = buildPublicClient(
+          context.rootChainRpcConfig,
+          context.namespace,
+        );
       }
 
       return instances.rootChainPublicClient;
diff --git a/apps/ensapi/src/lib/public-client.ts b/apps/ensapi/src/lib/public-client.ts
new file mode 100644
index 000000000..4c8b8d133
--- /dev/null
+++ b/apps/ensapi/src/lib/public-client.ts
@@ -0,0 +1,22 @@
+import { createPublicClient, fallback, http, type PublicClient } from "viem";
+
+import { type ENSNamespaceId, getENSRootChain } from "@ensnode/datasources";
+import type { RpcConfig } from "@ensnode/ensnode-sdk/internal";
+
+/**
+ * Builds a viem {@link PublicClient} for the ENS root chain with a fallback transport over all HTTP RPCs.
+ */
+export function buildPublicClient(
+  rootChainRpcConfig: RpcConfig,
+  namespace: ENSNamespaceId,
+): PublicClient {
+  return createPublicClient({
+    chain: getENSRootChain(namespace),
+    batch: {
+      multicall: {
+        batchSize: 2048,
+      },
+    },
+    transport: fallback(rootChainRpcConfig.httpRPCs.map((url) => http(url.toString()))),
+  });
+}

From f0520eebbbce48cc6c1b58a64a592b33244acb73 Mon Sep 17 00:00:00 2001
From: sevenzing <lymarenko.lev@gmail.com>
Date: Thu, 4 Jun 2026 12:40:15 +0300
Subject: [PATCH 2/3] add comment

---
 apps/ensapi/src/lib/public-client.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/apps/ensapi/src/lib/public-client.ts b/apps/ensapi/src/lib/public-client.ts
index 4c8b8d133..eb832691d 100644
--- a/apps/ensapi/src/lib/public-client.ts
+++ b/apps/ensapi/src/lib/public-client.ts
@@ -14,6 +14,7 @@ export function buildPublicClient(
     chain: getENSRootChain(namespace),
     batch: {
       multicall: {
+        // bytes per batch; default is 1024
         batchSize: 2048,
       },
     },

From eb822133b70a0cf6f8d10f2ac757aa9d1c7adb12 Mon Sep 17 00:00:00 2001
From: sevenzing <lymarenko.lev@gmail.com>
Date: Fri, 5 Jun 2026 15:25:13 +0300
Subject: [PATCH 3/3] rename build function

---
 apps/ensapi/src/di.ts                | 4 ++--
 apps/ensapi/src/lib/public-client.ts | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/apps/ensapi/src/di.ts b/apps/ensapi/src/di.ts
index 10614dd2e..b7e1fac60 100644
--- a/apps/ensapi/src/di.ts
+++ b/apps/ensapi/src/di.ts
@@ -18,7 +18,7 @@ import { buildConfigFromEnvironment, buildRootChainRpcConfig } from "@/config/co
 import { buildEnsDbConfigFromEnvironment } from "@/config/ensdb-config";
 import type { EnsApiEnvironment } from "@/config/environment";
 import { makeLogger } from "@/lib/logger";
-import { buildPublicClient } from "@/lib/public-client";
+import { buildRootChainPublicClient } from "@/lib/public-client";
 
 const logger = makeLogger("di");
 
@@ -153,7 +153,7 @@ export function buildEnsApiDiContext(ensApiEnvironment: EnsApiEnvironment): EnsA
 
     get rootChainPublicClient(): PublicClient {
       if (instances.rootChainPublicClient === undefined) {
-        instances.rootChainPublicClient = buildPublicClient(
+        instances.rootChainPublicClient = buildRootChainPublicClient(
           context.rootChainRpcConfig,
           context.namespace,
         );
diff --git a/apps/ensapi/src/lib/public-client.ts b/apps/ensapi/src/lib/public-client.ts
index eb832691d..083068520 100644
--- a/apps/ensapi/src/lib/public-client.ts
+++ b/apps/ensapi/src/lib/public-client.ts
@@ -6,7 +6,7 @@ import type { RpcConfig } from "@ensnode/ensnode-sdk/internal";
 /**
  * Builds a viem {@link PublicClient} for the ENS root chain with a fallback transport over all HTTP RPCs.
  */
-export function buildPublicClient(
+export function buildRootChainPublicClient(
   rootChainRpcConfig: RpcConfig,
   namespace: ENSNamespaceId,
 ): PublicClient {