class Grape::Validations::Validators::ContractScopeValidator

def build_errors_from_messages(messages)
  messages.map do |message|
    full_name = message.path.first.to_s
    full_name << "[#{message.path[1..].join('][')}]" if message.path.size > 1
    Grape::Exceptions::Validation.new(params: [full_name], message: message.text)
  end
end

def initialize(_attrs, _options, _required, _scope, opts)
  super
  @schema = opts.fetch(:schema)
end

def validate(request)
  res = schema.call(request.params)
  if res.success?
    request.params.deep_merge!(res.to_h)
    return
  end
  raise Grape::Exceptions::ValidationArrayErrors.new(build_errors_from_messages(res.errors.messages))
end