diff --git a/packages/hathor-rpc-handler/__tests__/rpcMethods/sendNanoContractTx.test.ts b/packages/hathor-rpc-handler/__tests__/rpcMethods/sendNanoContractTx.test.ts
index d9ac7e7..33cf571 100644
--- a/packages/hathor-rpc-handler/__tests__/rpcMethods/sendNanoContractTx.test.ts
+++ b/packages/hathor-rpc-handler/__tests__/rpcMethods/sendNanoContractTx.test.ts
@@ -103,6 +103,7 @@ describe('sendNanoContractTx', () => {
   it('should throw SendNanoContractTxFailure if the transaction fails', async () => {
     const pinCode = '1234';
     const ncData = {
+      method: 'initialize',
       blueprintId: rpcRequest.params.blueprint_id,
       ncId: rpcRequest.params.nc_id,
       args: rpcRequest.params.args,
diff --git a/packages/hathor-rpc-handler/src/rpcMethods/sendNanoContractTx.ts b/packages/hathor-rpc-handler/src/rpcMethods/sendNanoContractTx.ts
index 184235a..1b59f68 100644
--- a/packages/hathor-rpc-handler/src/rpcMethods/sendNanoContractTx.ts
+++ b/packages/hathor-rpc-handler/src/rpcMethods/sendNanoContractTx.ts
@@ -68,6 +68,7 @@ export async function sendNanoContractTx(
       blueprintId,
       ncId: nc_id,
       actions,
+      method,
       args,
       pushTx: push_tx,
     },
@@ -119,6 +120,10 @@ export async function sendNanoContractTx(
       response,
     } as RpcResponse;
   } catch (err) {
-    throw new SendNanoContractTxFailure();
+    if (err instanceof Error) {
+      throw new SendNanoContractTxFailure(err.message);
+    } else {
+      throw new SendNanoContractTxFailure('An unknown error occurred');
+    }
   }
 }
diff --git a/packages/hathor-rpc-handler/src/types/prompt.ts b/packages/hathor-rpc-handler/src/types/prompt.ts
index d22ad6f..5b318ed 100644
--- a/packages/hathor-rpc-handler/src/types/prompt.ts
+++ b/packages/hathor-rpc-handler/src/types/prompt.ts
@@ -115,6 +115,7 @@ export interface NanoContractParams {
   blueprintId: string;
   ncId: string | null;
   actions: NanoContractAction[],
+  method: string;
   args: unknown[];
   pushTx: boolean;
 }