How to Read data from blockchain into unity using the sdk ?

[lopeselio]

Hey I found the package Id, but I'm having trouble reading from the blockchain. I have a Player Object which stores metadata (xp, health etc). I'm creationg the Player Obect from unity like this

How do I read from the blockchain and retreve the metadata from the player object?

I tried doing this, but this only gives me the list of the objects

@tomfurrier @maomove

[navedjuwale-creator]

Hey @lopeselio! 👋

To read data from the blockchain into Unity using the Sui Unity SDK, you'll typically use the SuiClient to query objects. Based on your description, you have a package ID and a Player object stored on-chain. Here’s a step-by-step approach:

1. Get the Object ID(s) of Your Player Objects

You can either:

· Store the object ID in your game after creating the object.
· Or query for objects owned by an address or filtered by type.

Example: If you know the address that owns the Player objects, you can fetch them like this:

using Sui;
using Sui.Rpc;
using System.Collections.Generic;
using UnityEngine;

public class PlayerLoader : MonoBehaviour
{
    async void LoadPlayerObjects(string ownerAddress, string packageId, string moduleName, string structName)
    {
        var suiClient = SuiClient.GetInstance(); // or however you instantiate your client

        // Query owned objects (or you can use suiClient.GetOwnedObjects)
        var objects = await suiClient.GetOwnedObjects(ownerAddress);

        foreach (var obj in objects)
        {
            // Optionally filter by type: packageId::moduleName::structName
            if (obj.Data.Type.StartsWith($"{packageId}::{moduleName}::{structName}"))
            {
                Debug.Log($"Found Player object: {obj.Data.ObjectId}");
                // Parse the object content
                ParsePlayerObject(obj);
            }
        }
    }

    void ParsePlayerObject(SuiObjectResponse obj)
    {
        // The object's fields are inside obj.Data.Content.Fields
        var fields = obj.Data.Content.Fields;

        // Assuming your Player struct has fields like xp and health
        int xp = fields["xp"].ToObject<int>();
        int health = fields["health"].ToObject<int>();

        Debug.Log($"Player XP: {xp}, Health: {health}");

        // Now you can update your Unity GameObject or logic
    }
}

2. Directly Fetch by Object ID

If you already know the exact Object ID (e.g., you saved it after creation), you can fetch it directly:

var obj = await suiClient.GetObjectAsync(objectId);
ParsePlayerObject(obj);

3. Deserialize Complex Fields

If your Player object contains nested structures or vectors, you'll need to drill into the Fields dictionary accordingly. The SDK typically returns a Newtonsoft.Json.Linq.JObject, so you can use .ToObject() or access properties by name.

4. Important Notes

· Make sure your SuiClient is properly initialized (network, RPC URL, etc.).
· The object type string should match exactly the on-chain type: packageId::moduleName::StructName.
· If you're using a custom SDK (like Origin-Byte's), check their examples for the exact method signatures – they might have helper methods like suiClient.GetDynamicFields or suiClient.GetObject with more specific parameters.

Additional Tips

· Enable the Sui SDK's logging to see raw responses for debugging.
· If you're still getting only a list of objects without content, ensure you're requesting the full content (some queries return only references). Use suiClient.GetObjectAsync(objectId, SuiObjectDataOptions.FullContent) if available.

I hope this helps! Feel free to share more details if you're still stuck – like the exact code you tried or the error you saw. @tomfurrier @maomove might also have additional insights. Good luck!