diff --git a/.env.example b/.env.example
index 29a992b..8e98462 100644
--- a/.env.example
+++ b/.env.example
@@ -27,6 +27,7 @@ REDIS_URL="redis://localhost:6379"
 BLOCK_BUILDER_URL=http://localhost:3001
 
 # proxy
+BUILDER_TARGET_NETWORK=testnet
 BLOCK_BUILDER_VERSION=0.0.0
 PROXY_DOMAIN=localhost
 PROXY_FRP_TOKEN=dummy
diff --git a/packages/indexer/src/services/proxy.service.ts b/packages/indexer/src/services/proxy.service.ts
index 498e0ce..2c2a673 100644
--- a/packages/indexer/src/services/proxy.service.ts
+++ b/packages/indexer/src/services/proxy.service.ts
@@ -2,6 +2,7 @@ import { config } from "@intmax2-function/shared";
 
 export const getProxyMeta = async () => {
   return {
+    targetNetwork: config.BUILDER_TARGET_NETWORK,
     version: config.BLOCK_BUILDER_VERSION,
     domain: config.PROXY_DOMAIN,
     token: config.PROXY_FRP_TOKEN,
diff --git a/packages/shared/src/config/index.ts b/packages/shared/src/config/index.ts
index 2b62c10..8433535 100644
--- a/packages/shared/src/config/index.ts
+++ b/packages/shared/src/config/index.ts
@@ -37,6 +37,11 @@ export const config = cleanEnv(process.env, {
   // block builder
   BLOCK_BUILDER_URL: url({ devDefault: "http://localhost:3001" }),
   // proxy
+  BUILDER_TARGET_NETWORK: str({
+    choices: ["devnet", "testnet", "mainnet"],
+    default: "testnet",
+    desc: "Target network environment for the builder",
+  }),
   BLOCK_BUILDER_VERSION: str({ default: "0.0.0" }),
   PROXY_DOMAIN: str({ default: "localhost", desc: "" }),
   PROXY_FRP_TOKEN: str({ default: "dummy", desc: "" }),
diff --git a/packages/shared/src/db/baseIndexer.ts b/packages/shared/src/db/baseIndexer.ts
index 88fbd90..3dbc43c 100644
--- a/packages/shared/src/db/baseIndexer.ts
+++ b/packages/shared/src/db/baseIndexer.ts
@@ -42,7 +42,9 @@ export class BaseIndexer {
       await batch.commit();
       // this.invalidateCache();
     } catch (error) {
-      logger.error(error);
+      logger.error(
+        `Failed to add or update indexers: ${error instanceof Error ? error.message : error}`,
+      );
       throw new AppError(500, ErrorCode.INTERNAL_SERVER_ERROR, "Failed to add or update indexers");
     }
   }
@@ -75,7 +77,9 @@ export class BaseIndexer {
 
       // this.invalidateCache();
     } catch (error) {
-      logger.error(`Failed to update indexer active status: ${error}`);
+      logger.error(
+        `Failed to update indexer active status: ${error instanceof Error ? error.message : error}`,
+      );
       throw new AppError(
         500,
         ErrorCode.INTERNAL_SERVER_ERROR,
@@ -102,7 +106,7 @@ export class BaseIndexer {
 
       return indexers;
     } catch (error) {
-      logger.error(error);
+      logger.error(`Failed to list indexers: ${error instanceof Error ? error.message : error}`);
       throw new AppError(500, ErrorCode.INTERNAL_SERVER_ERROR, "Failed to list indexers");
     }
   }
@@ -139,7 +143,7 @@ export class BaseIndexer {
 
       return allItems;
     } catch (error) {
-      logger.error(error);
+      logger.error(`Failed to list indexers: ${error instanceof Error ? error.message : error}`);
       throw new AppError(
         500,
         ErrorCode.INTERNAL_SERVER_ERROR,