@nestjs/common/pipes/file/file-validator.interface.d.ts

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/**
 * Interface describing FileValidators, which can be added to a ParseFilePipe
 *
 * @see {ParseFilePipe}
 * @publicApi
 */
export declare abstract class FileValidator<TValidationOptions = Record<string, any>> {
    protected readonly validationOptions: TValidationOptions;
    constructor(validationOptions: TValidationOptions);
    /**
     * Indicates if this file should be considered valid, according to the options passed in the constructor.
     * @param file the file from the request object
     */
    abstract isValid(file?: any): boolean | Promise<boolean>;
    /**
     * Builds an error message in case the validation fails.
     * @param file the file from the request object
     */
    abstract buildErrorMessage(file: any): string;
}