refactor: Unify binary-data assertion across all nodes (no-changelog) (#5624)

packages/nodes-base/nodes/Pushover/Pushover.node.ts

@@ -1,15 +1,12 @@
-import type { IExecuteFunctions } from 'n8n-core';
-
 import type {
-	IBinaryKeyData,
 	IDataObject,
+	IExecuteFunctions,
 	ILoadOptionsFunctions,
 	INodeExecutionData,
 	INodePropertyOptions,
 	INodeType,
 	INodeTypeDescription,
 } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
 
 import { pushoverApiRequest } from './GenericFunctions';
 
@@ -339,25 +336,7 @@ export class Pushover implements INodeType {
 
 							if (attachment) {
 								const binaryPropertyName = attachment.binaryPropertyName as string;
-
-								if (items[i].binary === undefined) {
-									throw new NodeOperationError(this.getNode(), 'No binary data exists on item!', {
-										itemIndex: i,
-									});
-								}
-
-								const item = items[i].binary as IBinaryKeyData;
-
-								const binaryData = item[binaryPropertyName];
-
-								if (binaryData === undefined) {
-									throw new NodeOperationError(
-										this.getNode(),
-										`Item has no binary property called "${binaryPropertyName}"`,
-										{ itemIndex: i },
-									);
-								}
-
+								const binaryData = this.helpers.assertBinaryData(i, binaryPropertyName);
 								const dataBuffer = await this.helpers.getBinaryDataBuffer(i, binaryPropertyName);
 
 								body.attachment = {