Minting Gaming assets on Polygon using Onecdot APIs

PostRequest.cs

//PostRequest.cs
using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;
using System.Collections.Generic;


[System.Serializable]
public class Metadata
{
    public string imageURL;
    public string twitterHandle;
}

[System.Serializable]
public class MetadataList
{
    public string public_address;
    public Metadata metadata;
}

[System.Serializable]
public class Root
{
    public List<MetadataList> metadata_list;
    public string SaveToString()
    {
        return JsonUtility.ToJson(this);
    }
}
 
public class PostRequest : MonoBehaviour
{
    InputField outputArea;
     
    void Start()
    {
        outputArea = GameObject.Find("OutputArea").GetComponent<InputField>();
        GameObject.Find("PostButton").GetComponent<Button>().onClick.AddListener(PostData);
    }
 
    void PostData() => StartCoroutine(PostDataCoroutine());
 
    IEnumerator PostDataCoroutine()
    {
        outputArea.text = "Loading...";
        string url = "https://api.onec.in/api/v1/naas/mintNFT/";
        var webRequestVar = new UnityWebRequest(url, "POST");

        List<MetadataList> metadata_list = new List<MetadataList>();
        metadata_list.Add(new MetadataList
        {
            public_address = "0x0000000000000000000000000000000000",
            metadata = new Metadata
            {
                twitterHandle = "https://twitter.com/amnpandey",
                imageURL = "https://pbs.twimg.com/profile_images/1433036427223199748/QiPV4LYC_400x400.jpg"
            }
        });
        Root payload = new Root { 
                            metadata_list = metadata_list
                        };

        string json = JsonUtility.ToJson(payload);
        byte[] rawJSON = new System.Text.UTF8Encoding().GetBytes(json);

        webRequestVar.uploadHandler = (UploadHandler) new UploadHandlerRaw(rawJSON);
        webRequestVar.downloadHandler = (DownloadHandler) new DownloadHandlerBuffer();

        //Set headers for the request
        webRequestVar.SetRequestHeader("Content-Type", "application/json");
        webRequestVar.SetRequestHeader("NAAS-APIKEY", "PASTE_YOUR_APIKEY_FROM_DASHBOARD");

        //Makes request
        yield return webRequestVar.SendWebRequest();

        if (webRequestVar.isNetworkError || webRequestVar.isHttpError)
            outputArea.text = webRequestVar.error + webRequestVar.downloadHandler.text;
        else
            outputArea.text = webRequestVar.downloadHandler.text;
    }
}