snapshot of https://github.com/RocketChat/Rocket.Chat.git (develop, 2026-09-16; blobs > 131072B omitted)

apps/meteor/client/views/admin/subscription/hooks/useValidateLicense.ts

@@ -0,0 +1,36 @@
+import type { BehaviorWithContext } from '@rocket.chat/core-typings';
+import { useEndpoint } from '@rocket.chat/ui-contexts';
+import { useQuery } from '@tanstack/react-query';
+
+// Real licenses are well over this length; shorter input is still being typed.
+export const MIN_LICENSE_LENGTH = 100;
+
+export const isPlausibleLicense = (license: string): boolean => license.trim().length >= MIN_LICENSE_LENGTH;
+
+// RestApiClient unwraps failures into their parsed body, so a rejection is the failure body, not a Response.
+const isValidationFailure = (error: unknown): error is { reasons: BehaviorWithContext[] } =>
+	typeof error === 'object' && error !== null && Array.isArray((error as { reasons?: unknown }).reasons);
+
+export const useValidateLicense = (license: string, enabled = true) => {
+	const validateLicense = useEndpoint('POST', '/v1/licenses.validate');
+	const trimmedLicense = license.trim();
+
+	return useQuery({
+		queryKey: ['licenses.validate', trimmedLicense] as const,
+		queryFn: async (): Promise<{ valid: boolean; reasons: BehaviorWithContext[] }> => {
+			try {
+				await validateLicense({ license: trimmedLicense });
+				return { valid: true, reasons: [] };
+			} catch (error) {
+				if (isValidationFailure(error)) {
+					return { valid: false, reasons: error.reasons };
+				}
+				throw error;
+			}
+		},
+		enabled: enabled && isPlausibleLicense(trimmedLicense),
+		staleTime: Infinity,
+		gcTime: Infinity,
+		retry: false,
+	});
+};