diff --git a/types/zetrix-sdk-nodejs/index.d.ts b/types/zetrix-sdk-nodejs/index.d.ts
index c79470a9fa7f42..0721bcd9074de0 100644
--- a/types/zetrix-sdk-nodejs/index.d.ts
+++ b/types/zetrix-sdk-nodejs/index.d.ts
@@ -59,19 +59,19 @@ declare namespace ZtxChainSDK {
 
         checkStatus(): Response;
 
-        getTransactions(blockNumber: number): Response;
+        getTransactions(blockNumber: string): Response;
 
-        getInfo(blockNumber: number): Response;
+        getInfo(blockNumber: string): Response;
 
         getLatestInfo(): Response;
 
-        getValidators(blockNumber: number): Response;
+        getValidators(blockNumber: string): Response;
 
         getLatestValidators(): Response;
 
         getLatestReward(): Response;
 
-        getFees(blockNumber: number): Response;
+        getFees(blockNumber: string): Response;
 
         getLatestFees(): Response;
     }
@@ -115,6 +115,7 @@ declare namespace ZtxChainSDK {
 
     interface Response {
         result: any;
-        error: any;
+        errorCode: any;
+        errorDesc: any;
     }
 }
diff --git a/types/zetrix-sdk-nodejs/zetrix-sdk-nodejs-tests.ts b/types/zetrix-sdk-nodejs/zetrix-sdk-nodejs-tests.ts
index 90a2c2d2db55d4..06117f8adbc64e 100644
--- a/types/zetrix-sdk-nodejs/zetrix-sdk-nodejs-tests.ts
+++ b/types/zetrix-sdk-nodejs/zetrix-sdk-nodejs-tests.ts
@@ -33,13 +33,13 @@ const tokenInfo: ZtxChainSDK.Response = token.getInfo({});
 const block: ZtxChainSDK.Block = sdk.block;
 const blockNumber: ZtxChainSDK.Response = block.getNumber();
 const blockStatus: ZtxChainSDK.Response = block.checkStatus();
-const blockTransactions: ZtxChainSDK.Response = block.getTransactions(1);
-const blockInfo: ZtxChainSDK.Response = block.getInfo(1);
+const blockTransactions: ZtxChainSDK.Response = block.getTransactions("1");
+const blockInfo: ZtxChainSDK.Response = block.getInfo("1");
 const latestBlockInfo: ZtxChainSDK.Response = block.getLatestInfo();
-const validators: ZtxChainSDK.Response = block.getValidators(1);
+const validators: ZtxChainSDK.Response = block.getValidators("1");
 const latestValidators: ZtxChainSDK.Response = block.getLatestValidators();
 const latestReward: ZtxChainSDK.Response = block.getLatestReward();
-const fees: ZtxChainSDK.Response = block.getFees(1);
+const fees: ZtxChainSDK.Response = block.getFees("1");
 const latestFees: ZtxChainSDK.Response = block.getLatestFees();
 
 // Test Operation interface