fix(OpenAI Node): Descriptive errors (#6270)

packages/nodes-base/nodes/OpenAi/GenericFunctions.ts

@@ -0,0 +1,18 @@
+import type {
+	IExecuteSingleFunctions,
+	IN8nHttpFullResponse,
+	INodeExecutionData,
+	JsonObject,
+} from 'n8n-workflow';
+import { NodeApiError } from 'n8n-workflow';
+
+export async function sendErrorPostReceive(
+	this: IExecuteSingleFunctions,
+	data: INodeExecutionData[],
+	response: IN8nHttpFullResponse,
+): Promise<INodeExecutionData[]> {
+	if (String(response.statusCode).startsWith('4') || String(response.statusCode).startsWith('5')) {
+		throw new NodeApiError(this.getNode(), response as unknown as JsonObject);
+	}
+	return data;
+}