class Grape::Validations::ContractScope

def initialize(api, contract = nil, &block)
  # When block is passed, the first arg is either schema or nil.
  contract = Dry::Schema.Params(parent: contract, &block) if block
  if contract.respond_to?(:schema)
    # It's a Dry::Validation::Contract, then.
    contract = contract.new
    key_map = contract.schema.key_map
  else
    # Dry::Schema::Processor, hopefully.
    key_map = contract.key_map
  end
  api.namespace_stackable(:contract_key_map, key_map)
  validator_options = {
    validator_class: Grape::Validations.require_validator(:contract_scope),
    opts: { schema: contract, fail_fast: false }
  }
  api.namespace_stackable(:validations, validator_options)
end