// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
contract SavKriptoPresale is Ownable, ReentrancyGuard {
IERC20 public token;
uint256 public price; // Price of 1 token (in
BNB)
uint256 public tokensSold;
event TokensPurchased(address indexed buyer, uint256 amount);
event PresaleFunded(uint256 amount);
constructor() Ownable(msg.sender) {
token = IERC20(0x5fC457F7FE81868C960D9D47A6400B15c6bF5cbA); // token address
price = 0.000000001 ether; // Token price in
BNB (1 token = 0.000000001 BNB)
}
function buyTokens() public payable nonReentrant {
require(msg.value > 0, "BNB amount cannot be 0");
// Calculate total tokens to buy (taking into account the decimals of the token)
uint256 amountToBuy = (msg.value * 10**18) / price;
// Check if there are enough tokens in the contract
require(token.balanceOf(address(this)) >= amountToBuy, "Not enough tokens available");
tokensSold += amountToBuy;
token.transfer(msg.sender, amountToBuy);
emit TokensPurchased(msg.sender, amountToBuy);
}
function fundPresale(uint256 _amount) external onlyOwner nonReentrant {
require(token.balanceOf(msg.sender) >= _amount, "Insufficient token balance");
token.transferFrom(msg.sender, address(this), _amount);
emit PresaleFunded(_amount);
}
function withdrawBNB() external onlyOwner nonReentrant {
uint256 balance = address(this).balance;
require(balance > 0, "No BNB to withdraw");
payable(owner()).transfer(balance);
}
function withdrawTokens(uint256 _amount) external onlyOwner nonReentrant {
require(token.balanceOf(address(this)) >= _amount, "Insufficient token balance");
token.transfer(owner(), _amount);
}
function updatePrice(uint256 _newPrice) external onlyOwner {
require(_newPrice > 0, "Price must be greater than 0");
price = _newPrice;
}
}
