module.hpp

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#ifndef KAGOME_CORE_RUNTIME_MODULE_HPP
#define KAGOME_CORE_RUNTIME_MODULE_HPP

#include <optional>

#include "outcome/outcome.hpp"
#include "runtime/instance_environment.hpp"

namespace kagome::runtime {

  class ModuleInstance;

  class Module {
   public:
    virtual ~Module() = default;

    virtual outcome::result<std::shared_ptr<ModuleInstance>> instantiate()
        const = 0;
  };

  class SingleModuleCache {
   public:
    void set(std::shared_ptr<Module> module) {
      module_ = module;
    }

    std::optional<std::shared_ptr<Module>> try_extract() {
      auto module = module_;
      module_.reset();
      return module;
    }

   private:
    std::optional<std::shared_ptr<Module>> module_;
  };

}  // namespace kagome::runtime

#endif  // KAGOME_CORE_RUNTIME_MODULE_HPP