KaiaPlugin.jslib

// KaiaPlugin.jslib
mergeInto(LibraryManager.library, {
    ConnectWallet: function() {
        window.ConnectWallet();
    },
    
    DisconnectWallet: function() {
        window.DisconnectWallet();
    },
    
    GetConnectedAddress: function() {
        var address = window.GetConnectedAddress();
        var bufferSize = lengthBytesUTF8(address) + 1;
        var buffer = _malloc(bufferSize);
        stringToUTF8(address, buffer, bufferSize);
        return buffer;
    },
    
    MintToken: function(amount) {
        window.MintToken(amount);
    },
    
    GetBalance: function() {
        window.GetBalance();
    }
});

Web3Manager.cs

using UnityEngine;
using UnityEngine.UI;
using TMPro;
using System.Runtime.InteropServices;

public class Web3Manager : MonoBehaviour {
    [SerializeField] private Button connectButton;
    [SerializeField] private Button disconnectButton;  // New disconnect button
    [SerializeField] private Button mintButton;
    [SerializeField] private TextMeshProUGUI statusText;
    [SerializeField] private TextMeshProUGUI addressText;
    [SerializeField] private TextMeshProUGUI balanceText;
    [SerializeField] private TMP_InputField mintAmountInput;
    
    [DllImport("__Internal")]
    private static extern void ConnectWallet();
    
    [DllImport("__Internal")]
    private static extern void DisconnectWallet();  // New DllImport for disconnect function
    
    [DllImport("__Internal")]
    private static extern string GetConnectedAddress();
    
    [DllImport("__Internal")]
    private static extern void MintToken(int amount);
    
    [DllImport("__Internal")]
    private static extern void GetBalance();
    
    private void Start()
    {
        connectButton.onClick.AddListener(HandleConnectClick);
        disconnectButton.onClick.AddListener(HandleDisconnectClick);  // Add listener for disconnect button
        mintButton.onClick.AddListener(HandleMintClick);
        UpdateUI();
    }
    
    private void HandleConnectClick()
    {
        #if UNITY_WEBGL && !UNITY_EDITOR
            ConnectWallet();
            statusText.text = "Connecting...";
        #endif
    }
    
    private void HandleDisconnectClick()  // New method to handle disconnect button clicks
    {
        #if UNITY_WEBGL && !UNITY_EDITOR
            DisconnectWallet();
            statusText.text = "Disconnecting...";
        #endif
    }
    
    private void HandleMintClick()
    {
        #if UNITY_WEBGL && !UNITY_EDITOR
            if(int.TryParse(mintAmountInput.text, out int amount))
            {
                MintToken(amount);
                statusText.text = "Minting...";
            }
            else
            {
                statusText.text = "Invalid amount";
            }
        #endif
    }
    
    public void OnWalletConnected(string address)
    {
        Debug.Log($"Wallet connected: {address}");
        UpdateUI();
    }
    
    public void OnWalletDisconnected()  // New callback for disconnect success
    {
        Debug.Log("Wallet disconnected");
        statusText.text = "Disconnected";
        UpdateUI();
    }
    
    public void OnWalletError(string error)
    {
        Debug.LogError($"Wallet error: {error}");
        statusText.text = $"Wallet error: {error}";
    }
    
    public void OnMintSuccess(string txHash)
    {
        Debug.Log($"Mint successful: {txHash}");
        statusText.text = "Mint successful!";
        GetBalance(); // Update balance after mint
    }
    
    public void OnMintError(string error)
    {
        Debug.LogError($"Mint error: {error}");
        statusText.text = "Mint failed";
    }
    
    public void OnBalanceReceived(string balance)
    {
        Debug.Log($"Balance: {balance}");
        balanceText.text = $"Balance: {balance} tokens";
    }
    
    public void OnBalanceError(string error)
    {
        Debug.LogError($"Balance error: {error}");
        statusText.text = "Balance check failed";
    }
    
    private void UpdateUI()
    {
        #if UNITY_WEBGL && !UNITY_EDITOR
            string address = GetConnectedAddress();
            bool isConnected = !string.IsNullOrEmpty(address);
            
            statusText.text = isConnected ? "Connected" : "Not connected";
            addressText.text = isConnected ? $"Address: {address}" : "";
            connectButton.interactable = !isConnected;
            disconnectButton.interactable = isConnected;  // Enable disconnect button only when connected
            mintButton.interactable = isConnected;
            
            if(isConnected)
            {
                GetBalance();
            }
            else
            {
                balanceText.text = "Balance: 0 tokens";  // Reset balance text when disconnected
            }
        #endif
    }
}