API reference > @kontsedal/olas-core > FieldArrayValidator
FieldArrayValidator type
An array-level validator, for rules such as "at least one item". It sees every item's value. A string result lands in the array's topLevelErrors, and a FormIssue[] routes each message by its path, item index first.
Signature:
typescript
type FieldArrayValidator<I> = Validator<FieldArrayValue<I>>;References: Validator, FieldArrayValue