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

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

@@ -315,23 +315,8 @@ export class Raindrop implements INodeType {
 						// cover-specific endpoint
 
 						if (updateFields.cover) {
-							if (!items[i].binary) {
-								throw new NodeOperationError(this.getNode(), 'No binary data exists on item!', {
-									itemIndex: i,
-								});
-							}
-
-							if (!updateFields.cover) {
-								throw new NodeOperationError(
-									this.getNode(),
-									'Please enter a binary property to upload a cover image.',
-									{ itemIndex: i },
-								);
-							}
-
 							const binaryPropertyName = updateFields.cover as string;
-
-							const binaryData = items[i].binary![binaryPropertyName];
+							const binaryData = this.helpers.assertBinaryData(i, binaryPropertyName);
 							const dataBuffer = await this.helpers.getBinaryDataBuffer(i, binaryPropertyName);
 
 							const formData = {