For context: I'm using kotlin multiplatform to communicate with my backend for my both apps, I'm also trying to follow Clean Architecture + MVVM.
My multiplatform project holds my data layer (repositories and dtos) and my app project holds the presentation and domain layer (VC, View Model, Use Case).

I'm trying to do is mock my repository in the multiplatform project.

I have a class (DTO) on my Kotlin Multiplatform project that looks like this

```
@Serializable
data class LoginResponse(val data: LoginResponseBody){
    @Serializable
    data class LoginResponseBody(
        var accessToken: String,
        var lastChannel: String? = null,
        var lastDateTime: String? = null,
        var userId: String? = null,
        var transactionalKeyStatus: String? = null,
        var accessStatus: String? = null
    )
}

```

When I add that multiplatform project into my xcode project, the object translates to:

```
__attribute__((objc_subclassing_restricted))
__attribute__((swift_name("LoginResponse")))
@interface SharedEmaLoginResponse : SharedEmaBase
- (instancetype)initWithData:(SharedEmaLoginResponseLoginResponseBody *)data __attribute__((swift_name("init(data:)"))) __attribute__((objc_designated_initializer));
- (SharedEmaLoginResponseLoginResponseBody *)component1 __attribute__((swift_name("component1()")));
- (SharedEmaLoginResponse *)doCopyData:(SharedEmaLoginResponseLoginResponseBody *)data __attribute__((swift_name("doCopy(data:)")));
- (BOOL)isEqual:(id _Nullable)other __attribute__((swift_name("isEqual(_:)")));
- (NSUInteger)hash __attribute__((swift_name("hash()")));
- (NSString *)description __attribute__((swift_name("description()")));
@property (readonly) SharedEmaLoginResponseLoginResponseBody *data __attribute__((swift_name("data")));
@end;

```

I thought that class LoginResponse would conform to 'Decodable' but it doesn't, this is what my fake repository looks like in my xcode project

```
final class LoginRepositoryTest : XCTestCase, IAuthRepository {
var hasError = false

func login(loginRequest: LoginRequest, success: @escaping (LoginResponse) -> Void, failure: @escaping (ErrorResponse) -> Void, completionHandler: @escaping (KotlinUnit?, Error?) -> Void) {
    if hasError {
        failure(ErrorResponse(messages: []))
    } else {
        let data = loadStub(name: "loginResponse", extension: "json")
        let decoder = JSONDecoder()
        decoder.dateDecodingStrategy = .secondsSince1970

        let loginData = try! decoder.decode(LoginResponse.self, from: data)
        success(loginData)
    }
}

func getKoin() -> Koin_coreKoin {}

}

```

Error

> 
> Instance method 'decode(\_:from:)' requires that 'LoginResponse' conform to 'Decodable'
> 
> 
> 

I think I have these two options:

* I make that kotlin class conform to 'Decodable'
* I find a way to convert that JSON to that object without using Decodable

Any help is appreciated