diff --git a/scripts/serve.ts b/scripts/serve.ts
index f82cc701..e918d023 100755
--- a/scripts/serve.ts
+++ b/scripts/serve.ts
@@ -295,7 +295,6 @@ async function createGateway(name: string) {
       return new Gateway(new ZKSyncRollup(createProviderPair(config), config));
     }
     case 'base':
-      // return createOPGateway(OPRollup.baseMainnetConfig);
       return createOPFaultGateway(OPFaultRollup.baseMainnetConfig);
     case 'base-sepolia':
       return createOPFaultGateway(OPFaultRollup.baseSepoliaConfig);
diff --git a/src/zksync/ZKSyncProver.ts b/src/zksync/ZKSyncProver.ts
index 0d1c727a..521fe3fc 100755
--- a/src/zksync/ZKSyncProver.ts
+++ b/src/zksync/ZKSyncProver.ts
@@ -43,8 +43,7 @@ export class ZKSyncProver extends AbstractProver {
     return batchIndex + Number(relative); //(typeof relative === 'string' ? 0 : Number(relative));
   }
   static async latest(provider: Provider, relative: BigNumberish = 0) {
-    const batchIndex = await this.latestBatchIndex(provider, relative);
-    return new this(provider, batchIndex);
+    return new this(provider, await this.latestBatchIndex(provider, relative));
   }
   constructor(
     provider: Provider,