const contractAddress = "0xe526ed3eb2fad2b7a0c623635e76383ee9c11fe8";
const contractABI = [
    {
        inputs: [{ internalType: "address", name: "account", type: "address" }],
        name: "balanceOf",
        outputs: [{ internalType: "uint256", name: "", type: "uint256" }],
        stateMutability: "view",
        type: "function",
    },
    {
        inputs: [
            { internalType: "address", name: "recipient", type: "address" },
            { internalType: "uint256", name: "amount", type: "uint256" },
        ],
        name: "transfer",
        outputs: [{ internalType: "bool", name: "", type: "bool" }],
        stateMutability: "nonpayable",
        type: "function",
    },
    {
        anonymous: false,
        inputs: [
            { indexed: true, internalType: "address", name: "from", type: "address" },
            { indexed: true, internalType: "address", name: "to", type: "address" },
            { indexed: false, internalType: "uint256", name: "value", type: "uint256" }
        ],
        name: "Transfer",
        type: "event"
    }
];

class KylarCoinWallet {
    constructor() {
        this.provider = null;
        this.signer = null;
        this.contract = null;
        this.userAddress = null;
        this.lastKnownBalance = "0";
        this.balanceCheckInterval = null;
        this.pendingTransactions = new Set();
        this.isInitialized = false;
        this.networkName = null;
        this.elements = {
            connectButton: document.getElementById('connectWallet'),
            transferButton: document.getElementById('transferButton'),
            recipientInput: document.getElementById('recipientAddress'),
            amountInput: document.getElementById('transferAmount'),
            walletAddress: document.getElementById('walletAddress'),
            balanceDisplay: document.getElementById('balanceDisplay'),
            status: document.getElementById('status'),
            pendingTransactions: document.getElementById('pendingTransactions'),
            toast: document.getElementById('toast')
        };
        this.bindEvents();
    }

    bindEvents() {
        this.elements.connectButton.addEventListener('click', () => this.connectWallet());
        this.elements.transferButton.addEventListener('click', () => this.initiateTransfer());
        this.elements.amountInput.addEventListener('input', () => this.validateTransferAmount());
        this.elements.recipientInput.addEventListener('input', () => this.validateRecipientAddress());
        window.addEventListener('load', () => this.onLoad());
        window.addEventListener('beforeunload', () => this.stopPeriodicBalanceCheck());
    }

    async onLoad() {
        if (typeof window.ethereum !== 'undefined') {
            const accounts = await window.ethereum.request({ method: 'eth_accounts' });
            if (accounts.length > 0) {
                await this.initialize();
            }
        }
    }

    async initialize() {
        if (typeof window.ethereum === 'undefined') {
            throw new Error('MetaMask is not installed');
        }

        try {
            await window.ethereum.request({ method: 'eth_requestAccounts' });
            this.provider = new ethers.providers.Web3Provider(window.ethereum);
            this.signer = this.provider.getSigner();
            this.contract = new ethers.Contract(contractAddress, contractABI, this.signer);
            this.userAddress = await this.signer.getAddress();

            const network = await this.provider.getNetwork();
            this.networkName = network.name;

            this.setupEventListeners();
            this.updateWalletAddress();
            await this.updateBalance();
            this.startPeriodicBalanceCheck();

            this.isInitialized = true;
            this.updateStatus(`Connected to MetaMask on ${this.networkName}`);
            this.updateConnectButton(true);
            this.enableTransferUI(true);
        } catch (error) {
            this.handleError('Error initializing wallet', error);
        }
    }

    async connectWallet() {
        if (this.isInitialized) {
            await this.logout();
        } else {
            try {
                this.updateStatus('Connecting to MetaMask...');
                await this.initialize();
            } catch (error) {
                this.handleError('Error connecting to MetaMask', error);
            }
        }
    }

    async logout() {
        this.updateStatus('Logging out...');
        this.stopPeriodicBalanceCheck();
        this.isInitialized = false;
        this.userAddress = null;
        this.signer = null;
        this.contract = null;
        this.networkName = null;
        this.updateWalletAddress();
        this.updateBalance(true);
        this.updateStatus('Logged out');
        this.updateConnectButton(false);
        this.enableTransferUI(false);
    }

    updateConnectButton(isConnected) {
        this.elements.connectButton.textContent = isConnected ? 'Logout' : 'Connect to MetaMask';
    }

    enableTransferUI(enabled) {
        this.elements.transferButton.disabled = !enabled;
        this.elements.recipientInput.disabled = !enabled;
        this.elements.amountInput.disabled = !enabled;
    }

    updateWalletAddress() {
        if (this.userAddress) {
            const shortAddress = `${this.userAddress.slice(0, 6)}...${this.userAddress.slice(-4)}`;
            this.elements.walletAddress.textContent = `Wallet: ${shortAddress}`;
            this.elements.walletAddress.onclick = () => this.copyToClipboard(this.userAddress);
            this.elements.walletAddress.style.cursor = 'pointer';
            this.elements.walletAddress.title = 'Click to copy full address';
        } else {
            this.elements.walletAddress.textContent = 'Wallet: Not Connected';
            this.elements.walletAddress.onclick = null;
            this.elements.walletAddress.style.cursor = 'default';
            this.elements.walletAddress.title = '';
        }
    }

    async copyToClipboard(text) {
        try {
            await navigator.clipboard.writeText(text);
            this.showToast('Address copied to clipboard');
        } catch (err) {
            this.showToast('Failed to copy address');
        }
    }

    async updateBalance(forceZero = false) {
        if (forceZero || !this.isInitialized || !this.userAddress) {
            this.lastKnownBalance = "0";
            this.elements.balanceDisplay.textContent = 'Balance: 0 KYC';
            return;
        }

        try {
            const balance = await this.contract.balanceOf(this.userAddress);
            const formattedBalance = ethers.utils.formatEther(balance);
            const twoDecimalBalance = parseFloat(formattedBalance).toFixed(2);
            
            this.elements.balanceDisplay.textContent = `Balance: ${twoDecimalBalance} KYC`;
            
            if (twoDecimalBalance !== this.lastKnownBalance) {
                this.lastKnownBalance = twoDecimalBalance;
                this.showToast(`Balance updated: ${twoDecimalBalance} KYC`);
            }
        } catch (error) {
            this.handleError("Error updating balance", error);
        }
    }

    async initiateTransfer() {
        const recipient = this.elements.recipientInput.value;
        const amount = this.elements.amountInput.value;
        await this.transferTokens(recipient, amount);
    }

    async transferTokens(recipient, amount) {
        if (!this.isInitialized) {
            this.showToast('Wallet not initialized');
            return;
        }

        if (!recipient || !amount) {
            this.showToast('Please enter recipient address and amount');
            return;
        }

        try {
            const amountWei = ethers.utils.parseEther(amount.toString());
            const tx = await this.contract.transfer(recipient, amountWei);
            this.showToast('Transfer initiated. Waiting for confirmation...');
            
            this.pendingTransactions.add(tx.hash);
            this.updatePendingTransactionsUI();

            const receipt = await tx.wait();
            this.pendingTransactions.delete(tx.hash);
            this.updatePendingTransactionsUI();

            this.showToast('KYC Transfer Successful');
            await this.updateBalance();
        } catch (error) {
            this.handleError('Error Transferring KYC', error);
        }
    }

    updateStatus(message) {
        this.elements.status.textContent = message;
    }

    showToast(message) {
        this.elements.toast.textContent = message;
        this.elements.toast.classList.add('show');
        setTimeout(() => {
            this.elements.toast.classList.remove('show');
        }, 3000);
    }

    updatePendingTransactionsUI() {
        if (this.elements.pendingTransactions) {
            this.elements.pendingTransactions.textContent = `Pending Transactions: ${this.pendingTransactions.size}`;
        }
    }

    setupEventListeners() {
        if (this.contract) {
            this.contract.on("Transfer", (from, to, value, event) => {
                if (to.toLowerCase() === this.userAddress.toLowerCase()) {
                    console.log("Incoming Transfer Detected");
                    this.updateBalance();
                }
            });
        }

        window.ethereum.on('accountsChanged', async (accounts) => {
            if (accounts.length > 0) {
                console.log('Account changed, reinitializing wallet');
                this.showToast('Switching accounts...');
                await this.switchAccount(accounts[0]);
            } else {
                console.log('Disconnected');
                await this.logout();
            }
        });

        window.ethereum.on('chainChanged', () => {
            window.location.reload();
        });
    }

    validateTransferAmount() {
        const amount = parseFloat(this.elements.amountInput.value);
        const balance = parseFloat(this.lastKnownBalance);
        
        if (isNaN(amount) || amount <= 0) {
            this.elements.amountInput.setCustomValidity('Please enter a valid positive number');
        } else if (amount > balance) {
            this.elements.amountInput.setCustomValidity('Insufficient balance');
        } else {
            this.elements.amountInput.setCustomValidity('');
        }
        
        this.elements.amountInput.reportValidity();
    }

    validateRecipientAddress() {
        const isValidAddress = ethers.utils.isAddress(this.elements.recipientInput.value);
        
        if (!isValidAddress) {
            this.elements.recipientInput.setCustomValidity('Invalid Ethereum address');
        } else {
            this.elements.recipientInput.setCustomValidity('');
        }
        
        this.elements.recipientInput.reportValidity();
    }

    async switchAccount(newAccount) {
        this.userAddress = newAccount;
        this.signer = this.provider.getSigner();
        this.contract = new ethers.Contract(contractAddress, contractABI, this.signer);
        
        this.updateWalletAddress();
        await this.updateBalance();
        this.showToast('Account switched successfully');
    }

    startPeriodicBalanceCheck() {
        this.stopPeriodicBalanceCheck();
        this.balanceCheckInterval = setInterval(() => this.updateBalance(), 1000);
    }

    stopPeriodicBalanceCheck() {
        if (this.balanceCheckInterval) {
            clearInterval(this.balanceCheckInterval);
            this.balanceCheckInterval = null;
        }
    }

    handleError(message, error) {
        console.error(message, error);
        this.showToast(`${message}: ${error.message}`);
    }
}

const wallet = new KylarCoinWallet();
                    

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Kylar.io Coin</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css" integrity="sha512-Fo3rlrZj/k7ujTnH2N6QHfRFl2xkXlvMbX5Dd0Pjv7N0F5yWf5g5fQl1Yx1QgSBX2m1k/y5Sh02VpXxKkX4GQ==" crossorigin="anonymous" referrerpolicy="no-referrer" />
    <link rel="stylesheet" href="https://kylarcoin.com/developers/css/style.css"/>
</head>
<body>
    <div class="container">
        <h1>Kylar.io Coin</h1>
        <button id="connectWallet"><i class="fas fa-wallet"></i> Connect to MetaMask</button>
        <div id="balanceDisplay">Balance: 0 KYC</div>
        <input type="text" id="recipientAddress" placeholder="Recipient Address">
        <input type="number" id="transferAmount" placeholder="Amount to Transfer">
        <button id="transferButton"><i class="fas fa-paper-plane"></i> Transfer KYC</button>
        <div id="status"></div>
    </div>
    <script src="https://cdn.ethers.io/lib/ethers-5.2.umd.min.js"></script>
    <script src="https://kylarcoin.com/developers/js/kycintegration.js"></script>
</body>
</html>
        

#pragma once
#include <string>
#include <functional>
#include <memory>
#include <chrono>
#include <vector>

class KylarCoinIntegrationImpl;

class KylarCoinIntegration {
public:
    using Address = std::string;
    using Amount = double;
    using Timestamp = std::chrono::system_clock::time_point;

    struct BalanceInfo {
        Amount publicBalance;
        Amount mixerBalance;
        Timestamp lastUpdated;
    };

    using BalanceCallback = std::function<void(const BalanceInfo&, std::error_code)>;
    using TransferCallback = std::function<void(bool success, std::error_code)>;

    KylarCoinIntegration();
    ~KylarCoinIntegration();

    void initialize(const std::string& rpcUrl, const std::string& contractAddress, 
                    unsigned int retryAttempts = 3, std::chrono::milliseconds retryDelay = std::chrono::seconds(1));

    void checkBalance(const Address& address, BalanceCallback callback, 
                      std::chrono::milliseconds timeout = std::chrono::seconds(10));

    void setupBalanceListener(const Address& address, BalanceCallback callback, 
                              std::chrono::milliseconds updateFrequency = std::chrono::seconds(30));

    void transferTokens(const Address& from, const Address& to, Amount amount, 
                        TransferCallback callback, bool estimateGas = true);

    void batchCheckBalance(const std::vector<Address>& addresses, 
                           std::function<void(std::vector<BalanceInfo>, std::error_code)> callback);

private:
    std::unique_ptr<KylarCoinIntegrationImpl> pImpl;
};
        

#include "KylarCoinIntegration.h"
#include <web3cpp/Web3.h>
#include <web3cpp/Contract.h>
#include <web3cpp/EventFilter.h>
#include <thread>
#include <atomic>
#include <mutex>
#include <condition_variable>
#include <queue>
#include <future>

class KylarCoinIntegrationImpl {
public:
    Web3 web3;
    Contract contract;
    std::atomic<bool> isRunning{false};
    std::thread listenerThread;
    std::mutex mutex;
    std::condition_variable cv;
    std::queue<std::function<void()>> taskQueue;

    KylarCoinIntegrationImpl(const std::string& rpcUrl, const std::string& contractAddress, 
                             unsigned int retryAttempts, std::chrono::milliseconds retryDelay) 
        : web3(rpcUrl), contract(web3, contractAddress, ABI) {
        for (unsigned int i = 0; i < retryAttempts; ++i) {
            try {
                if (web3.isConnected()) {
                    break;
                }
            } catch (const std::exception& e) {
                if (i == retryAttempts - 1) throw;
                std::this_thread::sleep_for(retryDelay);
            }
        }
        startEventLoop();
    }

    ~KylarCoinIntegrationImpl() {
        stopEventLoop();
    }

    void startEventLoop() {
        isRunning = true;
        listenerThread = std::thread([this]() {
            while (isRunning) {
                std::function<void()> task;
                {
                    std::unique_lock<std::mutex> lock(mutex);
                    cv.wait(lock, [this] { return !taskQueue.empty() || !isRunning; });
                    if (!isRunning) return;
                    task = std::move(taskQueue.front());
                    taskQueue.pop();
                }
                task();
            }
        });
    }

    void stopEventLoop() {
        isRunning = false;
        cv.notify_all();
        if (listenerThread.joinable()) {
            listenerThread.join();
        }
    }

    template<typename F>
    void enqueueTask(F&& task) {
        {
            std::lock_guard<std::mutex> lock(mutex);
            taskQueue.emplace(std::forward<F>(task));
        }
        cv.notify_one();
    }

    void checkBalance(const KylarCoinIntegration::Address& address, 
                      KylarCoinIntegration::BalanceCallback callback,
                      std::chrono::milliseconds timeout) {
        auto futureResult = std::async(std::launch::async, [this, address]() {
            KylarCoinIntegration::BalanceInfo info;
            std::error_code ec;
            try {
                auto publicBalance = contract.call<BigNumber>("balanceOf", address);
                auto mixerBalance = contract.call<BigNumber>("mixerBalances", address);
                info.publicBalance = publicBalance.to_double() / 1e18;
                info.mixerBalance = mixerBalance.to_double() / 1e18;
                info.lastUpdated = std::chrono::system_clock::now();
            } catch (const std::exception& e) {
                ec = std::make_error_code(std::errc::io_error);
            }
            return std::make_pair(info, ec);
        });

        if (futureResult.wait_for(timeout) == std::future_status::ready) {
            auto result = futureResult.get();
            callback(result.first, result.second);
        } else {
            callback({}, std::make_error_code(std::errc::timed_out));
        }
    }

    void setupBalanceListener(const KylarCoinIntegration::Address& address, 
                              KylarCoinIntegration::BalanceCallback callback,
                              std::chrono::milliseconds updateFrequency) {
        enqueueTask([this, address, callback, updateFrequency]() {
            EventFilter filter = contract.events.Transfer().addTopics("Transfer(address,address,uint256)", address);
            web3.eth.subscribe(filter, [this, address, callback, updateFrequency](const Json::Value& event) {
                static std::chrono::system_clock::time_point lastUpdate;
                auto now = std::chrono::system_clock::now();
                if (now - lastUpdate >= updateFrequency) {
                    checkBalance(address, callback, std::chrono::seconds(10));
                    lastUpdate = now;
                }
            });
        });
    }

    void transferTokens(const KylarCoinIntegration::Address& from, 
                        const KylarCoinIntegration::Address& to,
                        KylarCoinIntegration::Amount amount, 
                        KylarCoinIntegration::TransferCallback callback,
                        bool estimateGas) {
        enqueueTask([this, from, to, amount, callback, estimateGas]() {
            try {
                BigNumber amountWei = BigNumber(amount * 1e18);
                TransactionParams params;
                params.from = from;
                params.to = to;
                params.value = amountWei;

                if (estimateGas) {
                    params.gas = contract.estimateGas("transfer", from, to, amountWei);
                    params.gasPrice = web3.eth.getGasPrice();
                }

                auto receipt = contract.send("transfer", params);
                callback(receipt.status == 1, std::error_code());
            } catch (const std::exception& e) {
                callback(false, std::make_error_code(std::errc::io_error));
            }
        });
    }

    void batchCheckBalance(const std::vector<KylarCoinIntegration::Address>& addresses,
                           std::function<void(std::vector<KylarCoinIntegration::BalanceInfo>, std::error_code)> callback) {
        enqueueTask([this, addresses, callback]() {
            std::vector<KylarCoinIntegration::BalanceInfo> results;
            std::error_code ec;
            try {
                for (const auto& address : addresses) {
                    auto publicBalance = contract.call<BigNumber>("balanceOf", address);
                    auto mixerBalance = contract.call<BigNumber>("mixerBalances", address);
                    results.push_back({
                        publicBalance.to_double() / 1e18,
                        mixerBalance.to_double() / 1e18,
                        std::chrono::system_clock::now()
                    });
                }
            } catch (const std::exception& e) {
                ec = std::make_error_code(std::errc::io_error);
            }
            callback(results, ec);
        });
    }
};

KylarCoinIntegration::KylarCoinIntegration() = default;
KylarCoinIntegration::~KylarCoinIntegration() = default;

void KylarCoinIntegration::initialize(const std::string& rpcUrl, const std::string& contractAddress,
                                      unsigned int retryAttempts, std::chrono::milliseconds retryDelay) {
    pImpl = std::make_unique<KylarCoinIntegrationImpl>(rpcUrl, contractAddress, retryAttempts, retryDelay);
}

void KylarCoinIntegration::checkBalance(const Address& address, BalanceCallback callback, std::chrono::milliseconds timeout) {
    pImpl->checkBalance(address, callback, timeout);
}

void KylarCoinIntegration::setupBalanceListener(const Address& address, BalanceCallback callback, std::chrono::milliseconds updateFrequency) {
    pImpl->setupBalanceListener(address, callback, updateFrequency);
}

void KylarCoinIntegration::transferTokens(const Address& from, const Address& to, Amount amount, TransferCallback callback, bool estimateGas) {
    pImpl->transferTokens(from, to, amount, callback, estimateGas);
}

void KylarCoinIntegration::batchCheckBalance(const std::vector<Address>& addresses, std::function<void(std::vector<BalanceInfo>, std::error_code)> callback) {
    pImpl->batchCheckBalance(addresses, callback);
}
        

#include "KylarCoinIntegration.h"
#include <iostream>
#include <iomanip>

int main() {
    KylarCoinIntegration kylarCoin;

    kylarCoin.initialize("https://mainnet.infura.io/v3/YOUR-PROJECT-ID", 
                         "0xe526ed3eb2fad2b7a0c623635e76383ee9c11fe8",
                         5, std::chrono::seconds(2));

    std::string userAddress = "0x1234...";

    kylarCoin.checkBalance(userAddress, [](const KylarCoinIntegration::BalanceInfo& info, std::error_code ec) {
        if (!ec) {
            std::cout << "Public Balance: " << std::fixed << std::setprecision(6) << info.publicBalance << " KYC" << std::endl;
            std::cout << "Mixer Balance: " << std::fixed << std::setprecision(6) << info.mixerBalance << " KYC" << std::endl;
        } else {
            std::cerr << "Error checking balance: " << ec.message() << std::endl;
        }
    });

    kylarCoin.setupBalanceListener(userAddress, [](const KylarCoinIntegration::BalanceInfo& info, std::error_code ec) {
        if (!ec) {
            std::cout << "Balance updated: " << std::fixed << std::setprecision(6) << (info.publicBalance + info.mixerBalance) << " KYC" << std::endl;
        } else {
            std::cerr << "Error in balance listener: " << ec.message() << std::endl;
        }
    });

    kylarCoin.transferTokens(userAddress, "0x5678...", 100.0, [](bool success, std::error_code ec) {
        if (success) {
            std::cout << "Transfer successful" << std::endl;
        } else {
            std::cerr << "Transfer failed: " << ec.message() << std::endl;
        }
    }, true);

    // Keep the program running to receive real-time updates
    std::cin.get();

    return 0;
}
        

using System;
using System.Collections.Generic;
using System.Numerics;
using System.Threading.Tasks;
using System.Linq;
using Nethereum.Hex.HexTypes;
using Nethereum.Web3;
using Nethereum.Contracts;
using Nethereum.RPC.Eth.DTOs;
using Nethereum.Util;
using Nethereum.Signer;
using Nethereum.Hex.HexConvertors.Extensions;
using UnityEngine;

public class KylarCoinIntegration : MonoBehaviour
{
    private const string ContractAddress = "0xe526ed3eb2fad2b7a0c623635e76383ee9c11fe8";
    private const string RpcUrl = "https://mainnet.infura.io/v3/YOUR-PROJECT-ID";
    private Web3 web3;
    private Contract contract;
    private string[] contractAbi;

    [Serializable]
    public class BalanceInfo
    {
        public decimal PublicBalance { get; set; }
        public decimal MixerBalance { get; set; }
        public DateTime LastUpdated { get; set; }
    }

    private async void Start()
    {
        await InitializeWeb3();
    }

    private async Task InitializeWeb3()
    {
        web3 = new Web3(RpcUrl);
        contractAbi = await LoadContractAbi();
        contract = web3.Eth.GetContract(contractAbi, ContractAddress);
        Debug.Log("Web3 initialized successfully");
    }

    private async Task LoadContractAbi()
    {
        // Load ABI from a JSON file or other source
        // This is a placeholder. Replace with actual ABI loading logic
        return new string[]
        {
            "{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"}",
            "{\"inputs\":[{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}",
            "{\"inputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"name\":\"mixerBalances\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"}"
        };
    }

    public async Task CheckBalance(string address)
    {
        try
        {
            var balanceOfFunction = contract.GetFunction("balanceOf");
            var mixerBalancesFunction = contract.GetFunction("mixerBalances");

            var publicBalanceTask = balanceOfFunction.CallAsync(address);
            var mixerBalanceTask = mixerBalancesFunction.CallAsync(address);

            await Task.WhenAll(publicBalanceTask, mixerBalanceTask);

            var publicBalance = Web3.Convert.FromWei(publicBalanceTask.Result);
            var mixerBalance = Web3.Convert.FromWei(mixerBalanceTask.Result);

            return new BalanceInfo
            {
                PublicBalance = publicBalance,
                MixerBalance = mixerBalance,
                LastUpdated = DateTime.UtcNow
            };
        }
        catch (Exception ex)
        {
            Debug.LogError($"Error checking balance: {ex.Message}");
            throw;
        }
    }

    public async Task TransferTokens(string fromAddress, string toAddress, decimal amount, string privateKey)
    {
        try
        {
            var transferFunction = contract.GetFunction("transfer");
            var amountWei = Web3.Convert.ToWei(amount);
            var gas = await EstimateGas(fromAddress, toAddress, amountWei);
            var gasPrice = await web3.Eth.GasPrice.SendRequestAsync();

            var transactionInput = transferFunction.CreateTransactionInput(fromAddress, toAddress, amountWei);
            transactionInput.Gas = gas;
            transactionInput.GasPrice = gasPrice;

            var signedTransaction = await SignTransaction(transactionInput, privateKey);
            var transactionHash = await web3.Eth.Transactions.SendRawTransaction.SendRequestAsync(signedTransaction);

            await WaitForTransactionReceipt(transactionHash);

            Debug.Log($"Transfer successful. Transaction hash: {transactionHash}");
            return transactionHash;
        }
        catch (Exception ex)
        {
            Debug.LogError($"Error transferring tokens: {ex.Message}");
            throw;
        }
    }

    private async Task EstimateGas(string fromAddress, string toAddress, BigInteger amountWei)
    {
        var transferFunction = contract.GetFunction("transfer");
        var gas = await transferFunction.EstimateGasAsync(fromAddress, null, null, toAddress, amountWei);
        return new HexBigInteger(gas.Value + (gas.Value / 10)); // Add 10% buffer
    }

    private async Task SignTransaction(TransactionInput transactionInput, string privateKey)
    {
        var signer = new EthereumMessageSigner();
        var signedTransaction = signer.SignTransaction(privateKey, transactionInput.To, transactionInput.Value, transactionInput.Nonce, transactionInput.GasPrice, transactionInput.Gas, transactionInput.Data);
        return signedTransaction.EnsureHexPrefix();
    }

    private async Task WaitForTransactionReceipt(string transactionHash, int maxAttempts = 50, int intervalMilliseconds = 1000)
    {
        for (int i = 0; i < maxAttempts; i++)
        {
            var receipt = await web3.Eth.Transactions.GetTransactionReceipt.SendRequestAsync(transactionHash);
            if (receipt != null)
            {
                if (receipt.Status.Value == 1)
                    return;
                else
                    throw new Exception("Transaction failed");
            }
            await Task.Delay(intervalMilliseconds);
        }
        throw new TimeoutException("Transaction receipt not found after maximum attempts");
    }

    public async Task SetupBalanceListener(string address, Action callback, int updateIntervalSeconds = 30)
    {
        BalanceInfo previousBalance = null;
        while (true)
        {
            try
            {
                var currentBalance = await CheckBalance(address);
                if (previousBalance == null || !AreBalancesEqual(currentBalance, previousBalance))
                {
                    callback(currentBalance);
                    previousBalance = currentBalance;
                }
            }
            catch (Exception ex)
            {
                Debug.LogError($"Error in balance listener: {ex.Message}");
            }
            await Task.Delay(TimeSpan.FromSeconds(updateIntervalSeconds));
        }
    }

    private bool AreBalancesEqual(BalanceInfo balance1, BalanceInfo balance2)
    {
        return balance1.PublicBalance == balance2.PublicBalance && balance1.MixerBalance == balance2.MixerBalance;
    }

    public async Task> BatchCheckBalance(IEnumerable addresses)
    {
        var tasks = addresses.Select(CheckBalance);
        return await Task.WhenAll(tasks);
    }

    public async Task> GetTransactionHistory(string address, BigInteger startBlock, BigInteger? endBlock = null)
    {
        var transferEventHandler = contract.GetEvent("Transfer");
        var filterInput = transferEventHandler.CreateFilterInput(new object[] { address }, new object[] { address });

        filterInput.FromBlock = new BlockParameter(startBlock);
        filterInput.ToBlock = endBlock.HasValue ? new BlockParameter(endBlock.Value) : BlockParameter.CreateLatest();

        var events = await transferEventHandler.GetAllChanges(filterInput);
        return events.Select(FormatTransactionEvent).ToList();
    }

    private TransactionEvent FormatTransactionEvent(EventLog eventLog)
    {
        var evt = eventLog.Event;
        evt.TransactionHash = eventLog.Log.TransactionHash;
        evt.BlockNumber = eventLog.Log.BlockNumber.Value;
        return evt;
    }

    [Serializable]
    public class TransactionEvent
    {
        public string From { get; set; }
        public string To { get; set; }
        public BigInteger Value { get; set; }
        public string TransactionHash { get; set; }
        public BigInteger BlockNumber { get; set; }
    }
}

using UnityEngine;
using System.Threading.Tasks;

public class KylarCoinExample : MonoBehaviour
{
    private KylarCoinIntegration kylarCoin;
    private string userAddress = "0x1234..."; // Replace with actual address
    private string privateKey = "YOUR_PRIVATE_KEY"; // Be extremely cautious with private keys!

    private async void Start()
    {
        kylarCoin = gameObject.AddComponent();
        await Task.Delay(1000); // Wait for KylarCoinIntegration to initialize

        // Check balance
        try
        {
            var balance = await kylarCoin.CheckBalance(userAddress);
            Debug.Log($"Public Balance: {balance.PublicBalance} KYC");
            Debug.Log($"Mixer Balance: {balance.MixerBalance} KYC");
        }
        catch (System.Exception e)
        {
            Debug.LogError($"Error checking balance: {e.Message}");
        }

        // Set up balance listener
        kylarCoin.SetupBalanceListener(userAddress, OnBalanceUpdate);

        // Example transfer (be careful with real transfers!)
        try
        {
            string recipientAddress = "0x5678..."; // Replace with actual recipient address
            decimal amount = 100.0m;
            var txHash = await kylarCoin.TransferTokens(userAddress, recipientAddress, amount, privateKey);
            Debug.Log($"Transfer successful. Transaction hash: {txHash}");
        }
        catch (System.Exception e)
        {
            Debug.LogError($"Transfer failed: {e.Message}");
        }

        // Get transaction history
        try
        {
            var history = await kylarCoin.GetTransactionHistory(userAddress, 12345678);
            foreach (var transaction in history)
            {
                Debug.Log($"Transaction: {Web3.Convert.FromWei(transaction.Value)} KYC " +
                          $"{(transaction.From.ToLower() == userAddress.ToLower() ? "sent to" : "received from")} " +
                          $"{(transaction.From.ToLower() == userAddress.ToLower() ? transaction.To : transaction.From)}");
            }
        }
        catch (System.Exception e)
        {
            Debug.LogError($"Error fetching transaction history: {e.Message}");
        }
    }

    private void OnBalanceUpdate(KylarCoinIntegration.BalanceInfo info)
    {
        Debug.Log($"Balance updated: {info.PublicBalance + info.MixerBalance} KYC");
    }
}

#pragma once
#include "KylarCoinIntegration.h"
#include 
#include 
#include 
#include 
#include 
#include 
class NFCReader;
class NFCTag;
class KylarCoinNFCIntegration {
public:
    struct NFCTransactionInfo {
        std::string senderAddress;
        std::string recipientAddress;
        double amount;
        std::chrono::system_clock::time_point timestamp;
        bool isMixerTransaction;
        std::optional escrowId;
    };
    using NFCTransactionCallback = std::function;
    using NFCTagDetectedCallback = std::function;

    KylarCoinNFCIntegration();
    ~KylarCoinNFCIntegration();

    void initialize(const std::string& rpcUrl, const std::string& contractAddress);

    void startNFCScanning(NFCTagDetectedCallback callback);
    void stopNFCScanning();

    void registerNFCTag(const std::string& userAddress, const NFCTag& tag, const std::string& encryptionKey);
    void unregisterNFCTag(const NFCTag& tag);

    void processNFCTransaction(const NFCTransactionInfo& transactionInfo, NFCTransactionCallback callback);

    void setTransactionConfirmationMethod(bool useFingerprint, bool usePin = false);

    KylarCoinIntegration::BalanceInfo getBalanceFromNFCTag(const NFCTag& tag, const std::string& decryptionKey);

    void setupProximityAlert(double maxDistance, std::function callback);

    void encryptWalletDataToNFC(const std::string& walletData, const NFCTag& tag, const std::string& encryptionKey);
    std::string decryptWalletDataFromNFC(const NFCTag& tag, const std::string& decryptionKey);

    void syncTransactionHistoryToNFC(const std::string& userAddress, const NFCTag& tag, const std::string& encryptionKey);

    void enableOfflineTransactions(bool enable, uint256_t maxOfflineAmount = 1000000000000000000);

    void setTransactionLimits(double dailyLimit, double singleTransactionLimit, double mixerLimit);

    void createNFCEscrow(const NFCTag& buyerTag, const NFCTag& sellerTag, const NFCTag& mediatorTag, double amount, uint256_t deadline, NFCTransactionCallback callback);

    void resolveNFCEscrow(uint256_t escrowId, const NFCTag& resolverTag, const NFCTag& winnerTag, NFCTransactionCallback callback);

    void stakeViaNFC(const NFCTag& userTag, double amount, NFCTransactionCallback callback);

    void unstakeViaNFC(const NFCTag& userTag, double amount, NFCTransactionCallback callback);

    void claimRewardsViaNFC(const NFCTag& userTag, NFCTransactionCallback callback);

private:
    std::unique_ptr nfcReader;
    std::unique_ptr kylarCoin;
    bool offlineTransactionsEnabled;
    uint256_t maxOfflineTransactionAmount;
    double dailyTransactionLimit;
    double singleTransactionLimit;
    double mixerTransactionLimit;

    bool verifyNFCTransaction(const NFCTransactionInfo& transactionInfo);
    std::string readEncryptedDataFromNFCTag(const NFCTag& tag);
    void writeEncryptedDataToNFCTag(const NFCTag& tag, const std::string& data);
    void updateOfflineTransactionLog(const NFCTransactionInfo& transactionInfo);
    void syncOfflineTransactions();
};
        

#include "KylarCoinNFCIntegration.h"
#include "NFCReader.h"
#include "NFCTag.h"
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

KylarCoinNFCIntegration::KylarCoinNFCIntegration()
: nfcReader(std::make_unique()),
  kylarCoin(std::make_unique()),
  offlineTransactionsEnabled(false),
  maxOfflineTransactionAmount(1000000000000000000), // 1 KYC by default
  dailyTransactionLimit(10000),
  singleTransactionLimit(1000),
  mixerTransactionLimit(500) {}

KylarCoinNFCIntegration::~KylarCoinNFCIntegration() = default;

void KylarCoinNFCIntegration::initialize(const std::string& rpcUrl, const std::string& contractAddress) {
    kylarCoin->initialize(rpcUrl, contractAddress);
    nfcReader->initialize();
}

void KylarCoinNFCIntegration::startNFCScanning(NFCTagDetectedCallback callback) {
    nfcReader->startScanning([this, callback](const NFCTag& tag) {
        // Perform pre-processing of the NFC tag here
        if (verifyNFCTag(tag)) {
            callback(tag);
        }
    });
}

void KylarCoinNFCIntegration::stopNFCScanning() {
    nfcReader->stopScanning();
}

void KylarCoinNFCIntegration::registerNFCTag(const std::string& userAddress, const NFCTag& tag, const std::string& encryptionKey) {
    Json::Value userData;
    userData["address"] = userAddress;
    userData["registrationTime"] = std::chrono::system_clock::now().time_since_epoch().count();
    std::string encryptedData = encryptData(userData.toStyledString(), encryptionKey);
    writeEncryptedDataToNFCTag(tag, encryptedData);
}

void KylarCoinNFCIntegration::processNFCTransaction(const NFCTransactionInfo& transactionInfo, NFCTransactionCallback callback) {
    if (!verifyNFCTransaction(transactionInfo)) {
        callback(transactionInfo, std::make_error_code(std::errc::permission_denied));
        return;
    }
    if (transactionInfo.isMixerTransaction) {
        kylarCoin->transferFromMixer(transactionInfo.recipientAddress, transactionInfo.amount, [callback, transactionInfo](bool success, std::error_code ec) {
            if (success) {
                updateOfflineTransactionLog(transactionInfo);
            }
            callback(transactionInfo, ec);
        });
    } else if (transactionInfo.escrowId) {
        // Handle escrow-related transactions
        // This is a placeholder and should be implemented based on your specific escrow logic
    } else {
        kylarCoin->transferTokens(transactionInfo.senderAddress, transactionInfo.recipientAddress, transactionInfo.amount, [callback, transactionInfo](bool success, std::error_code ec) {
            if (success) {
                updateOfflineTransactionLog(transactionInfo);
            }
            callback(transactionInfo, ec);
        });
    }
}

KylarCoinIntegration::BalanceInfo KylarCoinNFCIntegration::getBalanceFromNFCTag(const NFCTag& tag, const std::string& decryptionKey) {
    std::string encryptedData = readEncryptedDataFromNFCTag(tag);
    std::string decryptedData = decryptData(encryptedData, decryptionKey);
    Json::Value userData;
    Json::Reader reader;
    if (!reader.parse(decryptedData, userData)) {
        throw std::runtime_error("Failed to parse NFC tag data");
    }
    std::string address = userData["address"].asString();
    return kylarCoin->checkBalance(address);
}

void KylarCoinNFCIntegration::createNFCEscrow(const NFCTag& buyerTag, const NFCTag& sellerTag, const NFCTag& mediatorTag, double amount, uint256_t deadline, NFCTransactionCallback callback) {
    std::string buyerAddress = getAddressFromNFCTag(buyerTag);
    std::string sellerAddress = getAddressFromNFCTag(sellerTag);
    std::string mediatorAddress = getAddressFromNFCTag(mediatorTag);
    kylarCoin->createEscrow(sellerAddress, mediatorAddress, amount, deadline, [this, callback](uint256_t escrowId, std::error_code ec) {
        if (!ec) {
            NFCTransactionInfo escrowInfo {
                .senderAddress = buyerAddress,
                .recipientAddress = sellerAddress,
                .amount = amount,
                .timestamp = std::chrono::system_clock::now(),
                .isMixerTransaction = false,
                .escrowId = escrowId
            };
            callback(escrowInfo, ec);
        } else {
            callback({}, ec);
        }
    });
}

void KylarCoinNFCIntegration::enableOfflineTransactions(bool enable, uint256_t maxOfflineAmount) {
    offlineTransactionsEnabled = enable;
    maxOfflineTransactionAmount = maxOfflineAmount;
}

void KylarCoinNFCIntegration::setTransactionLimits(double dailyLimit, double singleTransactionLimit, double mixerLimit) {
    dailyTransactionLimit = dailyLimit;
    this->singleTransactionLimit = singleTransactionLimit;
    mixerTransactionLimit = mixerLimit;
}

bool KylarCoinNFCIntegration::verifyNFCTransaction(const NFCTransactionInfo& transactionInfo) {
    // Implement verification logic, including checking transaction limits
    if (transactionInfo.amount > singleTransactionLimit) {
        return false;
    }
    if (transactionInfo.isMixerTransaction && transactionInfo.amount > mixerTransactionLimit) {
        return false;
    }
    // Check daily limit (this would require maintaining a transaction log)
    // ...
    return true;
}

std::string KylarCoinNFCIntegration::encryptData(const std::string& data, const std::string& key) {
    // Implement encryption using CryptoPP
    // ...
}

std::string KylarCoinNFCIntegration::decryptData(const std::string& encryptedData, const std::string& key) {
    // Implement decryption using CryptoPP
    // ...
}

void KylarCoinNFCIntegration::updateOfflineTransactionLog(const NFCTransactionInfo& transactionInfo) {
    // Implement offline transaction logging
    // ...
}

void KylarCoinNFCIntegration::syncOfflineTransactions() {
    // Implement syncing of offline transactions when online
    // ...
}
        

#include "KylarCoinNFCIntegration.h"
#include 
#include 
#include 
#include 

int main() {
    KylarCoinNFCIntegration nfcIntegration;

    // Initialize the integration
    nfcIntegration.initialize("https://mainnet.infura.io/v3/YOUR-PROJECT-ID", "0xe526ed3eb2fad2b7a0c623635e76383ee9c11fe8");

    // Enable offline transactions with a maximum of 5 KYC
    nfcIntegration.enableOfflineTransactions(true, 5000000000000000000);

    // Set transaction limits
    nfcIntegration.setTransactionLimits(10000, 1000, 500);

    // Start NFC scanning
    nfcIntegration.startNFCScanning([&](const NFCTag& tag) {
        std::cout << "NFC Tag detected: " << tag.getUid() << std::endl;

        // Get balance from NFC tag
        auto balance = nfcIntegration.getBalanceFromNFCTag(tag, "decryption_key");
        std::cout << "Balance: " << balance.publicBalance << " KYC (Public), " << balance.mixerBalance << " KYC (Mixer)" << std::endl;

        // Process a payment
        KylarCoinNFCIntegration::NFCTransactionInfo paymentInfo {
            .senderAddress = "0x1234...",
            .recipientAddress = "0x5678...",
            .amount = 10.0,
            .timestamp = std::chrono::system_clock::now(),
            .isMixerTransaction = false
        };

        nfcIntegration.processNFCTransaction(paymentInfo, [](const KylarCoinNFCIntegration::NFCTransactionInfo& info, std::error_code ec) {
            if (!ec) {
                std::cout << "Payment successful: " << info.amount << " KYC sent." << std::endl;
            } else {
                std::cerr << "Payment failed: " << ec.message() << std::endl;
            }
        });

        // Create an escrow
        NFCTag sellerTag("seller_tag_uid");
        NFCTag mediatorTag("mediator_tag_uid");
        nfcIntegration.createNFCEscrow(tag, sellerTag, mediatorTag, 100.0, 1234567890, [](const KylarCoinNFCIntegration::NFCTransactionInfo& info, std::error_code ec) {
            if (!ec) {
                std::cout << "Escrow created successfully. Escrow ID: " << *info.escrowId << std::endl;
            } else {
                std::cerr << "Failed to create escrow: " << ec.message() << std::endl;
            }
        });

        // Stake tokens via NFC
        nfcIntegration.stakeViaNFC(tag, 50.0, [](const KylarCoinNFCIntegration::NFCTransactionInfo& info, std::error_code ec) {
            if (!ec) {
                std::cout << "Successfully staked " << info.amount << " KYC" << std::endl;
            } else {
                std::cerr << "Staking failed: " << ec.message() << std::endl;
            }
        });

        // Claim rewards via NFC
        nfcIntegration.claimRewardsViaNFC(tag, [](const KylarCoinNFCIntegration::NFCTransactionInfo& info, std::error_code ec) {
            if (!ec) {
                std::cout << "Successfully claimed " << info.amount << " KYC in rewards" << std::endl;
            } else {
                std::cerr << "Reward claim failed: " << ec.message() << std::endl;
            }
        });
    });

    // Setup proximity alert
    nfcIntegration.setupProximityAlert(0.1, [](const NFCTag& tag, double distance) {
        std::cout << "NFC Tag " << tag.getUid() << " is " << distance << "m away." << std::endl;
    });

    // Keep the program running
    std::this_thread::sleep_for(std::chrono::hours(1));

    // Stop NFC scanning before exit
    nfcIntegration.stopNFCScanning();

    return 0;
}
        

package io.kylar.nfc;

import android.app.Activity;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.os.Bundle;
import java.math.BigInteger;
import java.util.Date;
import java.util.Optional;

public class KylarCoinNFCIntegration {
    public static class NFCTransactionInfo {
        public String senderAddress;
        public String recipientAddress;
        public double amount;
        public Date timestamp;
        public boolean isMixerTransaction;
        public Optional escrowId;

        // Constructor and getters/setters
    }

    public interface NFCTransactionCallback {
        void onTransactionComplete(NFCTransactionInfo info, Exception error);
    }

    public interface NFCTagDetectedCallback {
        void onTagDetected(Tag tag);
    }

    private NfcAdapter nfcAdapter;
    private Activity activity;
    private KylarCoinIntegration kylarCoin;

    public KylarCoinNFCIntegration(Activity activity) {
        this.activity = activity;
        this.nfcAdapter = NfcAdapter.getDefaultAdapter(activity);
        this.kylarCoin = new KylarCoinIntegration();
    }

    public void initialize(String rpcUrl, String contractAddress) {
        kylarCoin.initialize(rpcUrl, contractAddress);
        // Initialize NFC adapter
    }

    public void startNFCScanning(NFCTagDetectedCallback callback) {
        if (nfcAdapter != null) {
            NfcAdapter.ReaderCallback readerCallback = tag -> {
                // Perform pre-processing of the NFC tag here
                if (verifyNFCTag(tag)) {
                    callback.onTagDetected(tag);
                }
            };
            Bundle options = new Bundle();
            nfcAdapter.enableReaderMode(activity, readerCallback, NfcAdapter.FLAG_READER_NFC_A | NfcAdapter.FLAG_READER_NFC_B, options);
        }
    }

    public void stopNFCScanning() {
        if (nfcAdapter != null) {
            nfcAdapter.disableReaderMode(activity);
        }
    }

    public void registerNFCTag(String userAddress, Tag tag, String encryptionKey) {
        // Implement NFC tag registration logic
    }

    public void processNFCTransaction(NFCTransactionInfo transactionInfo, NFCTransactionCallback callback) {
        if (!verifyNFCTransaction(transactionInfo)) {
            callback.onTransactionComplete(transactionInfo, new SecurityException("Transaction verification failed"));
            return;
        }

        if (transactionInfo.isMixerTransaction) {
            kylarCoin.transferFromMixer(transactionInfo.recipientAddress, transactionInfo.amount, (success, error) -> {
                if (success) {
                    updateOfflineTransactionLog(transactionInfo);
                }
                callback.onTransactionComplete(transactionInfo, error);
            });
        } else if (transactionInfo.escrowId.isPresent()) {
            // Handle escrow-related transactions
        } else {
            kylarCoin.transferTokens(transactionInfo.senderAddress, transactionInfo.recipientAddress, transactionInfo.amount, (success, error) -> {
                if (success) {
                    updateOfflineTransactionLog(transactionInfo);
                }
                callback.onTransactionComplete(transactionInfo, error);
            });
        }
    }

    public void setTransactionConfirmationMethod(boolean useFingerprint, boolean usePin) {
        // Implement biometric or PIN confirmation for transactions
    }

    public KylarCoinIntegration.BalanceInfo getBalanceFromNFCTag(Tag tag, String decryptionKey) {
        // Implement balance retrieval from NFC tag
        return null;
    }

    public void setupProximityAlert(double maxDistance, ProximityAlertCallback callback) {
        // Implement proximity alert for NFC tags
    }

    public void enableOfflineTransactions(boolean enable, BigInteger maxOfflineAmount) {
        // Implement offline transaction settings
    }

    public void setTransactionLimits(double dailyLimit, double singleTransactionLimit, double mixerLimit) {
        // Implement transaction limit settings
    }

    public void createNFCEscrow(Tag buyerTag, Tag sellerTag, Tag mediatorTag, double amount, BigInteger deadline, NFCTransactionCallback callback) {
        // Implement NFC-based escrow creation
    }

    public void resolveNFCEscrow(BigInteger escrowId, Tag resolverTag, Tag winnerTag, NFCTransactionCallback callback) {
        // Implement NFC-based escrow resolution
    }

    public void stakeViaNFC(Tag userTag, double amount, NFCTransactionCallback callback) {
        // Implement NFC-based staking
    }

    public void unstakeViaNFC(Tag userTag, double amount, NFCTransactionCallback callback) {
        // Implement NFC-based unstaking
    }

    public void claimRewardsViaNFC(Tag userTag, NFCTransactionCallback callback) {
        // Implement NFC-based reward claiming
    }

    private boolean verifyNFCTag(Tag tag) {
        // Implement NFC tag verification logic
        return true;
    }

    private boolean verifyNFCTransaction(NFCTransactionInfo transactionInfo) {
        // Implement transaction verification logic
        return true;
    }

    private void updateOfflineTransactionLog(NFCTransactionInfo transactionInfo) {
        // Implement offline transaction logging
    }

    private void syncOfflineTransactions() {
        // Implement syncing of offline transactions when online
    }

    // Additional helper methods as needed
}
        

import android.app.Activity;
import android.nfc.Tag;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;
import io.kylar.nfc.KylarCoinNFCIntegration;

public class NFCActivity extends Activity {
    private KylarCoinNFCIntegration nfcIntegration;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_nfc);

        nfcIntegration = new KylarCoinNFCIntegration(this);

        // Initialize the integration
        nfcIntegration.initialize("https://mainnet.infura.io/v3/YOUR-PROJECT-ID", "0xe526ed3eb2fad2b7a0c623635e76383ee9c11fe8");

        // Enable offline transactions with a maximum of 5 KYC
        nfcIntegration.enableOfflineTransactions(true, new BigInteger("5000000000000000000"));

        // Set transaction limits
        nfcIntegration.setTransactionLimits(10000, 1000, 500);

        // Start NFC scanning
        nfcIntegration.startNFCScanning(new KylarCoinNFCIntegration.NFCTagDetectedCallback() {
            @Override
            public void onTagDetected(Tag tag) {
                Log.d("NFCActivity", "NFC Tag detected: " + bytesToHex(tag.getId()));

                // Get balance from NFC tag
                KylarCoinIntegration.BalanceInfo balance = nfcIntegration.getBalanceFromNFCTag(tag, "decryption_key");
                Log.d("NFCActivity", "Balance: " + balance.publicBalance + " KYC (Public), " + balance.mixerBalance + " KYC (Mixer)");

                // Process a payment
                KylarCoinNFCIntegration.NFCTransactionInfo paymentInfo = new KylarCoinNFCIntegration.NFCTransactionInfo();
                paymentInfo.senderAddress = "0x1234...";
                paymentInfo.recipientAddress = "0x5678...";
                paymentInfo.amount = 10.0;
                paymentInfo.timestamp = new Date();
                paymentInfo.isMixerTransaction = false;

                nfcIntegration.processNFCTransaction(paymentInfo, new KylarCoinNFCIntegration.NFCTransactionCallback() {
                    @Override
                    public void onTransactionComplete(KylarCoinNFCIntegration.NFCTransactionInfo info, Exception error) {
                        if (error == null) {
                            Log.d("NFCActivity", "Payment successful: " + info.amount + " KYC sent.");
                            Toast.makeText(NFCActivity.this, "Payment successful", Toast.LENGTH_SHORT).show();
                        } else {
                            Log.e("NFCActivity", "Payment failed: " + error.getMessage());
                            Toast.makeText(NFCActivity.this, "Payment failed", Toast.LENGTH_SHORT).show();
                        }
                    }
                });

                // Additional NFC operations (escrow, staking, etc.) can be implemented here
            }
        });
    }

    @Override
    protected void onPause() {
        super.onPause();
        nfcIntegration.stopNFCScanning();
    }

    @Override
    protected void onResume() {
        super.onResume();
        nfcIntegration.startNFCScanning(/* callback */);
    }

    private static String bytesToHex(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        for (byte b : bytes) {
            sb.append(String.format("%02x", b));
        }
        return sb.toString();
    }
}
        

import asyncio
import time
from typing import List, Callable, Optional, Union
from dataclasses import dataclass
from web3 import Web3, AsyncWeb3
from web3.eth import AsyncEth
from web3.exceptions import ContractLogicError, TransactionNotFound
from eth_account import Account
from eth_account.signers.local import LocalAccount
from eth_typing import Address, ChecksumAddress
import logging

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

@dataclass
class BalanceInfo:
    public_balance: float
    mixer_balance: float
    last_updated: float

class KylarCoinIntegrationError(Exception):
    """Base exception class for KylarCoinIntegration"""

class InitializationError(KylarCoinIntegrationError):
    """Raised when initialization fails"""

class BalanceCheckError(KylarCoinIntegrationError):
    """Raised when balance check fails"""

class TransferError(KylarCoinIntegrationError):
    """Raised when token transfer fails"""

class KylarCoinIntegration:
    def __init__(self):
        self.web3: Optional[AsyncWeb3] = None
        self.contract = None
        self.contract_address = "0xe526ed3eb2fad2b7a0c623635e76383ee9c11fe8"
        self.abi = [
            {
                "inputs": [{"internalType": "address", "name": "account", "type": "address"}],
                "name": "balanceOf",
                "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}],
                "stateMutability": "view",
                "type": "function",
            },
            {
                "inputs": [
                    {"internalType": "address", "name": "recipient", "type": "address"},
                    {"internalType": "uint256", "name": "amount", "type": "uint256"},
                ],
                "name": "transfer",
                "outputs": [{"internalType": "bool", "name": "", "type": "bool"}],
                "stateMutability": "nonpayable",
                "type": "function",
            },
            {
                "inputs": [{"internalType": "address", "name": "", "type": "address"}],
                "name": "mixerBalances",
                "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}],
                "stateMutability": "view",
                "type": "function",
            },
        ]

    async def initialize(self, rpc_url: str, retry_attempts: int = 3, retry_delay: float = 1.0):
        for attempt in range(retry_attempts):
            try:
                self.web3 = AsyncWeb3(AsyncWeb3.AsyncHTTPProvider(rpc_url))
                self.contract = self.web3.eth.contract(address=self.contract_address, abi=self.abi)
                if await self.web3.is_connected():
                    logger.info("Web3 initialized successfully")
                    return
            except Exception as e:
                logger.warning(f"Initialization attempt {attempt + 1} failed: {str(e)}")
                if attempt == retry_attempts - 1:
                    raise InitializationError(f"Failed to initialize after {retry_attempts} attempts") from e
                await asyncio.sleep(retry_delay)

    async def check_balance(self, address: Union[str, Address, ChecksumAddress], timeout: float = 10.0) -> BalanceInfo:
        try:
            address = self.web3.to_checksum_address(address)
            public_balance, mixer_balance = await asyncio.gather(
                self.contract.functions.balanceOf(address).call(),
                self.contract.functions.mixerBalances(address).call()
            )
            return BalanceInfo(
                public_balance=self.web3.from_wei(public_balance, 'ether'),
                mixer_balance=self.web3.from_wei(mixer_balance, 'ether'),
                last_updated=time.time()
            )
        except asyncio.TimeoutError:
            raise BalanceCheckError("Balance check timed out")
        except ContractLogicError as e:
            raise BalanceCheckError(f"Contract error: {str(e)}")
        except Exception as e:
            raise BalanceCheckError(f"Unexpected error during balance check: {str(e)}")

    async def setup_balance_listener(self, address: Union[str, Address, ChecksumAddress], 
                                     callback: Callable[[BalanceInfo], None], 
                                     update_interval: float = 30.0):
        address = self.web3.to_checksum_address(address)
        async def balance_listener():
            previous_balance = None
            while True:
                try:
                    balance_info = await self.check_balance(address)
                    if balance_info != previous_balance:
                        callback(balance_info)
                        previous_balance = balance_info
                except Exception as e:
                    logger.error(f"Error in balance listener: {str(e)}")
                await asyncio.sleep(update_interval)

        asyncio.create_task(balance_listener())

    async def transfer_tokens(self, from_address: Union[str, Address, ChecksumAddress], 
                              to_address: Union[str, Address, ChecksumAddress], 
                              amount: float, private_key: str, estimate_gas: bool = True):
        from_address = self.web3.to_checksum_address(from_address)
        to_address = self.web3.to_checksum_address(to_address)
        amount_wei = self.web3.to_wei(amount, 'ether')
        
        try:
            if estimate_gas:
                gas_estimate = await self.contract.functions.transfer(to_address, amount_wei).estimate_gas({'from': from_address})
                gas_price = await self.web3.eth.gas_price
            else:
                gas_estimate = 200000  # Default gas limit
                gas_price = await self.web3.eth.gas_price

            transaction = self.contract.functions.transfer(to_address, amount_wei).build_transaction({
                'from': from_address,
                'gas': int(gas_estimate * 1.2),  # Add 20% buffer to gas estimate
                'gasPrice': gas_price,
                'nonce': await self.web3.eth.get_transaction_count(from_address),
            })

            signed_txn = self.web3.eth.account.sign_transaction(transaction, private_key=private_key)
            tx_hash = await self.web3.eth.send_raw_transaction(signed_txn.rawTransaction)
            
            # Wait for transaction confirmation
            tx_receipt = await self.web3.eth.wait_for_transaction_receipt(tx_hash, timeout=120)
            
            if tx_receipt['status'] == 1:
                logger.info(f"Transfer successful. Transaction hash: {tx_hash.hex()}")
                return tx_receipt
            else:
                raise TransferError("Transaction failed")
        except TransactionNotFound:
            raise TransferError("Transaction not found. It might have been dropped from the network.")
        except Exception as e:
            raise TransferError(f"Transfer failed: {str(e)}")

    async def batch_check_balance(self, addresses: List[Union[str, Address, ChecksumAddress]]) -> List[BalanceInfo]:
        tasks = [self.check_balance(self.web3.to_checksum_address(address)) for address in addresses]
        return await asyncio.gather(*tasks)

    async def get_transaction_history(self, address: Union[str, Address, ChecksumAddress], 
                                      start_block: int, end_block: int = 'latest') -> List[dict]:
        address = self.web3.to_checksum_address(address)
        if end_block == 'latest':
            end_block = await self.web3.eth.block_number

        transfer_filter = self.contract.events.Transfer.create_filter(
            fromBlock=start_block,
            toBlock=end_block,
            argument_filters={'from': address, 'to': address}
        )
        
        events = await transfer_filter.get_all_entries()
        return [self._format_transfer_event(event) for event in events]

    def _format_transfer_event(self, event: dict) -> dict:
        return {
            'from': event['args']['from'],
            'to': event['args']['to'],
            'value': self.web3.from_wei(event['args']['value'], 'ether'),
            'transaction_hash': event['transactionHash'].hex(),
            'block_number': event['blockNumber']
        }
        

import asyncio
from kylar_coin_integration import KylarCoinIntegration, BalanceInfo, TransferError

async def main():
    # Initialize the Kylar.io Coin integration
    kylar_coin = KylarCoinIntegration()
    await kylar_coin.initialize("https://mainnet.infura.io/v3/YOUR-PROJECT-ID")

    # Set up your account details
    user_address = "0x1234..."
    private_key = "YOUR_PRIVATE_KEY"  # Be cautious with private keys!

    # Check balance
    try:
        balance_info = await kylar_coin.check_balance(user_address)
        print(f"Public Balance: {balance_info.public_balance} KYC")
        print(f"Mixer Balance: {balance_info.mixer_balance} KYC")
    except Exception as e:
        print(f"Error checking balance: {str(e)}")

    # Set up a balance listener
    def balance_update_callback(info: BalanceInfo):
        print(f"Balance updated: {info.public_balance + info.mixer_balance} KYC")

    await kylar_coin.setup_balance_listener(user_address, balance_update_callback)

    # Transfer tokens
    try:
        transfer_result = await kylar_coin.transfer_tokens(user_address, "0x5678...", 100.0, private_key)
        print(f"Transfer successful. Transaction hash: {transfer_result['transactionHash'].hex()}")
    except TransferError as e:
        print(f"Transfer failed: {str(e)}")

    # Get transaction history
    try:
        history = await kylar_coin.get_transaction_history(user_address, start_block=12345678)
        for transaction in history:
            print(f"Transaction: {transaction['value']} KYC {'sent to' if transaction['from'] == user_address else 'received from'} {transaction['to' if transaction['from'] == user_address else 'from']}")
    except Exception as e:
        print(f"Error fetching transaction history: {str(e)}")

    # Keep the program running to receive real-time updates
    await asyncio.sleep(3600)

if __name__ == "__main__":
    asyncio.run(main())