NIS API for Android - Retrofit2

NIS.java

// NOT DONE YET!
// THIS IS FIRST REVISION, PLEASE CONTACT ME IF YOU DID WORK ON THIS SO I CAN MERGE CHANGES!

import java.util.List;

import retrofit2.Call;
import retrofit2.http.GET;

/**
 * Created by Nikhil Jha on 7/27/2016.
 * License: MIT
 */

public class NIS {
    public class Heartbeat {
        int code;
        int type;
        String message;
        public Heartbeat(int code, int type, String message) {
            this.code = code;
            this.type = type;
            this.message = message;
        }
    }

    public class GeneratedAccount {
        String privateKey;
        String address;
        String publicKey;
        public GeneratedAccount(String privateKey, String address, String publicKey) {
            this.privateKey = privateKey;
            this.address = address;
            this.publicKey = publicKey;
        }
    }

    public class Address {
        String address;
        public Address(String address) {
            this.address = address;
        }
    }

    public class AccountMetaDataPair {
        public class Account {
            public String address;
            public long balance;
            public long vestedBalance;
            public double importance;
            public String publicKey;
            public String label;
            public int harvestedBlocks;

            public Account(String address, long balance, long vestedBalance, double importance, String publicKey, String label, int harvestedBlocks) {
                this.address = address;
                this.balance = balance;
                this.vestedBalance = vestedBalance;
                this.importance = importance;
                this.publicKey = publicKey;
                this.label = label;
                this.harvestedBlocks = harvestedBlocks;
            }
        }

        public class Meta {
            public List<String> cosignatoryOf;
            public List<String> cosignatories;
            public String status;
            public String remoteStatus;

            public Meta(List<String> cosignatoryOf, List<String> cosignatories, String status, String remoteStatus) {
                this.cosignatoryOf = cosignatoryOf;
                this.cosignatories = cosignatories;
                this.status = status;
                this.remoteStatus = remoteStatus;
            }
        }

        public class RootObject {
            public Account account;
            public Meta meta;

            public RootObject(Account account, Meta meta){
                this.account = account;
                this.meta = meta;
            }
        }
    }

    public interface API {
        @GET("/heartbeat")
        Call<Heartbeat> HEARTBEAT_CALL();

        @GET("/status")
        Call<Heartbeat> STATUS_CALL();

        @GET("/account/generate")
        Call<GeneratedAccount> GENERATE_ACCOUNT_CALL();

        @GET("/account/get")
        Call<AccountMetaDataPair.RootObject> GET_ACCOUNT_CALL();
    }
}