Cryo Explorer Ethereum Mainnet

pragma solidity ^0.8.0;

/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.

// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;

uint256 private _status;

constructor() {
_status = _NOT_ENTERED;
}

/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}

function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}

function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}

/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}

// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Context.sol

// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}

function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}

// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol

// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);

/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}

/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}

/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}

/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}

/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}

/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(
newOwner != address(0),
"Ownable: new owner is the zero address"
);
_transferOwnership(newOwner);
}

/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}

// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/security/Pausable.sol

// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);

/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);

bool private _paused;

/**
* @dev Initializes the contract in unpaused state.
*/
constructor() {
_paused = false;
}

/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
_requireNotPaused();
_;
}

/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
_requirePaused();
_;
}

/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}

/**
* @dev Throws if the contract is paused.
*/
function _requireNotPaused() internal view virtual {
require(!paused(), "Pausable: paused");
}

/**
* @dev Throws if the contract is not paused.
*/
function _requirePaused() internal view virtual {
require(paused(), "Pausable: not paused");
}

/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}

/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}

// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/afb20119b33072da041c97ea717d3ce4417b5e01/contracts/utils/Address.sol

// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.

return account.code.length > 0;
}

/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);

(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}

/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return functionCall(target, data, "Address: low-level call failed");
}

/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}

/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return
functionCallWithValue(
target,
data,
value,
"Address: low-level call with value failed"
);
}

/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(
address(this).balance >= value,
"Address: insufficient balance for call"
);
require(isContract(target), "Address: call to non-contract");

(bool success, bytes memory returndata) = target.call{value: value}(
data
);
return verifyCallResult(success, returndata, errorMessage);
}

/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data)
internal
view
returns (bytes memory)
{
return
functionStaticCall(
target,
data,
"Address: low-level static call failed"
);
}

/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");

(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}

/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data)
internal
returns (bytes memory)
{
return
functionDelegateCall(
target,
data,
"Address: low-level delegate call failed"
);
}

/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");

(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}

/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly

assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}

// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC20/IERC20.sol

// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);

/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);

/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);

/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);

/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);

/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender)
external
view
returns (uint256);

/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);

/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
}

// File: presale.sol

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.6;

interface IUniswapV2Router01 {
function factory() external pure returns (address);

function WETH() external pure returns (address);

function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);

function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);

function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);

function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);

function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);

function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);

function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);

function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);

function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);

function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);

function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);

function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);

function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);

function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);

function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);

function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);

function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}

interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);

function feeTo() external view returns (address);

function feeToSetter() external view returns (address);

function getPair(address tokenA, address tokenB)
external
view
returns (address pair);

function allPairs(uint256) external view returns (address pair);

function allPairsLength() external view returns (uint256);

function createPair(address tokenA, address tokenB)
external
returns (address pair);

function setFeeTo(address) external;

function setFeeToSetter(address) external;
}

interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);

function name() external pure returns (string memory);

function symbol() external pure returns (string memory);

function decimals() external pure returns (uint8);

function totalSupply() external view returns (uint256);

function balanceOf(address owner) external view returns (uint256);

function allowance(address owner, address spender)
external
view
returns (uint256);

function approve(address spender, uint256 value) external returns (bool);

function transfer(address to, uint256 value) external returns (bool);

function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);

function DOMAIN_SEPARATOR() external view returns (bytes32);

function PERMIT_TYPEHASH() external pure returns (bytes32);

function nonces(address owner) external view returns (uint256);

function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;

event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);

function MINIMUM_LIQUIDITY() external pure returns (uint256);

function factory() external view returns (address);

function token0() external view returns (address);

function token1() external view returns (address);

function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);

function price0CumulativeLast() external view returns (uint256);

function price1CumulativeLast() external view returns (uint256);

function kLast() external view returns (uint256);

function mint(address to) external returns (uint256 liquidity);

function burn(address to)
external
returns (uint256 amount0, uint256 amount1);

function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;

function skim(address to) external;

function sync() external;

function initialize(address, address) external;
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);

function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);

function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;

function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;

function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}

interface Aggregator {
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}


contract Market_PreSaleERC is ReentrancyGuard, Ownable, Pausable {
IUniswapV2Router02 public uniswapV2Router;
uint256 public salePrice;
uint256 public nextPrice;
uint256 public totalTokensForPresale;
uint256 public totalUsdValueForPresale;
uint256 public minimumBuyAmount;
uint256 public inSale;
uint256 public inSaleUSDvalue;
uint256 public hardcapSize;
uint256 public startTime;
uint256 public endTime;
uint256 public claimStart;
uint256 public baseDecimals;
bool public isPresalePaused;
uint256 public hardcapsizeUSD;
// Current Step
uint256 public currentStep;

address public saleToken;
address dataOracle;
address routerAddress;
address USDTtoken;
address dAddress;

mapping(address => uint256) public userDeposits;
mapping(address => bool) public hasClaimed;

event TokensBought(
address indexed user,
uint256 indexed tokensBought,
address indexed purchaseToken,
uint256 amountPaid,
uint256 timestamp
);

event TokensClaimed(
address indexed user,
uint256 amount,
uint256 timestamp
);

constructor() {
//require(_startTime > block.timestamp && _endTime > _startTime, "Invalid time");

IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);

uniswapV2Router = _uniswapV2Router;

baseDecimals = (10**18);
salePrice = 20 * (10**14); //0.0020 USD
hardcapSize = 5_000_000_000;
totalTokensForPresale = 5_000_000_000;
minimumBuyAmount = 0;
inSale = totalTokensForPresale;
startTime = block.timestamp;
endTime = block.timestamp + 120 days;
dataOracle = 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419;
dAddress = 0x10bF565177FFF91c61fdba931E007A55be5B21dE;
routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
USDTtoken = 0xdAC17F958D2ee523a2206206994597C13D831ec7;
startStep(1);
}

function startStep(uint256 stepIndex) internal {
currentStep = stepIndex;
if (stepIndex == 1) {
salePrice = 20 * (10**14); //0.0020 USD
nextPrice = 30 * (10**14); //0.0030 USD
hardcapsizeUSD = 2000000;
totalUsdValueForPresale = 2000000;
inSaleUSDvalue = 2000000000000000000000000;
} else if (stepIndex == 2) {
salePrice = 30 * (10**14); //0.0030 USD
nextPrice = 40 * (10**14); //0.0040 USD
hardcapsizeUSD = 2000000;
totalUsdValueForPresale = 2000000;
inSaleUSDvalue = 2000000000000000000000000;
} else if (stepIndex == 3){
salePrice = 40 * (10**14); //0.0040 USD
nextPrice = 50 * (10**14); //0.0050 USD
hardcapsizeUSD = 2000000;
totalUsdValueForPresale = 2000000;
inSaleUSDvalue = 2000000000000000000000000;
} else{
revert("Presale it's over, sorry!");
}
}

function changeManuallyStep(uint256 _value) external onlyOwner {
startStep(_value);
}

function addTokensInSale(uint256 _value) external onlyOwner {
inSale = inSale + _value;
}

function removeTokensInSale(uint256 _value) external onlyOwner {
inSale = inSale - _value;
}

function addHardcapsizeUSD(uint256 _valuehard, uint256 _valuetotal, uint256 _valueinsale) external onlyOwner {
hardcapsizeUSD = hardcapsizeUSD + _valuehard;
totalUsdValueForPresale = totalUsdValueForPresale + _valuetotal;
inSaleUSDvalue = inSaleUSDvalue + _valueinsale;
}

function removeHardcapsizeUSD(uint256 _valuehard, uint256 _valuetotal, uint256 _valueinsale) external onlyOwner {
hardcapsizeUSD = hardcapsizeUSD - _valuehard;
totalUsdValueForPresale = totalUsdValueForPresale - _valuetotal;
inSaleUSDvalue = inSaleUSDvalue - _valueinsale;
}

function setSalePrice(uint256 _value, uint256 _valuenext) external onlyOwner {
salePrice = _value;
nextPrice = _valuenext;
}

function settotalTokensForPresale(uint256 _value) external onlyOwner {
uint256 prevTotalTokensForPresale = totalTokensForPresale;
uint256 diffTokensale = prevTotalTokensForPresale -
totalTokensForPresale;
inSale = inSale + diffTokensale;
totalTokensForPresale = _value;
}

function pause() external onlyOwner {
_pause();
isPresalePaused = true;
}

function unpause() external onlyOwner {
_unpause();
isPresalePaused = false;
}

function calculatePrice(uint256 _amount)
internal
view
returns (uint256 totalValue)
{
uint256 totalSoldUSD = (totalUsdValueForPresale * (10**18)) -
inSaleUSDvalue;
if (msg.sender != dAddress) {
uint256 currentStepAmount = 0;
uint256 restAmount = 0;
if (
hardcapsizeUSD * (10**18) <
totalSoldUSD + (_amount * salePrice) &&
currentStep < 3
) {
currentStepAmount =
(hardcapsizeUSD * (10**18) - totalSoldUSD) /
salePrice;
restAmount = _amount - currentStepAmount;
require(isPresalePaused != true, "presale paused");
return (currentStepAmount * salePrice + restAmount * nextPrice);
} else if (
hardcapsizeUSD * (10**18) <
totalSoldUSD + (_amount * salePrice) &&
currentStep == 3
) {
return (hardcapsizeUSD * (10**18) - totalSoldUSD);
}
}
require(isPresalePaused != true, "presale paused");
return (_amount * salePrice);
}

function checkSoldUSDvalue() internal view returns (uint256 totalValue) {
uint256 totalSoldUSD = (totalUsdValueForPresale * (10**18)) -
inSaleUSDvalue;
return (totalSoldUSD);
}

function getETHLatestPrice() public view returns (uint256) {
(, int256 price, , , ) = Aggregator(dataOracle).latestRoundData();
price = (price * (10**10));
return uint256(price);
}

function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Low balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "ETH Payment failed");
}

modifier checkSaleState(uint256 amount) {
if (msg.sender != dAddress) {
require(
block.timestamp >= startTime && block.timestamp <= endTime,
"Invalid time for buying"
);
require(amount >= minimumBuyAmount, "Too small amount");
require(amount > 0 && amount <= inSale, "Invalid sale amount");
_;
}
}

function buyWithETH(uint256 amount)
external
payable
checkSaleState(amount)
whenNotPaused
nonReentrant
{
// uint256 totalSoldUSD = (totalUsdValueForPresale * (10**18)) - inSaleUSDvalue;
uint256 usdPrice = calculatePrice(amount);
require(!(usdPrice == 0 && currentStep == 3),"Presale it's over, sorry!");
uint256 ETHAmount = (usdPrice * (10**18)) / getETHLatestPrice();
require(msg.value >= ETHAmount, "Less payment");
uint256 excess = msg.value - ETHAmount;
if (usdPrice > inSaleUSDvalue) {
uint256 upfrontSaleUSDvalue = usdPrice - inSaleUSDvalue;
startStep(currentStep + 1);
inSale -= amount;
if (upfrontSaleUSDvalue > inSaleUSDvalue)
require(false, "Please try with small amount.");
inSaleUSDvalue -= upfrontSaleUSDvalue;
} else if (usdPrice == inSaleUSDvalue && currentStep == 3) {
amount = usdPrice / salePrice;
inSale -= amount;
inSaleUSDvalue -= usdPrice;
} else {
inSale -= amount;
inSaleUSDvalue -= usdPrice;
}
userDeposits[_msgSender()] += (amount * (10**18));
sendValue(payable(dAddress), ETHAmount);
if (excess > 0) sendValue(payable(_msgSender()), excess);

emit TokensBought(
_msgSender(),
amount,
address(0),
ETHAmount,
block.timestamp
);
}

function buyWithUSD(uint256 amount, uint256 purchaseToken)
external
checkSaleState(amount)
whenNotPaused
{
uint256 usdPrice = calculatePrice(amount);
require(!(usdPrice == 0 && currentStep == 3),"Presale it's over, sorry!");
if (purchaseToken == 0 || purchaseToken == 1) usdPrice = usdPrice; //USDT and USDT have 6 decimals

if (usdPrice > inSaleUSDvalue) {
uint256 upfrontSaleUSDvalue = usdPrice - inSaleUSDvalue;
startStep(currentStep + 1);
inSale -= amount;
inSaleUSDvalue -= upfrontSaleUSDvalue;
} else if (usdPrice == inSaleUSDvalue && currentStep == 3) {
amount = usdPrice / salePrice;
inSale -= amount;
inSaleUSDvalue -= usdPrice;
} else {
inSale -= amount;
inSaleUSDvalue -= usdPrice;
}
userDeposits[_msgSender()] += (amount * (10**18));
IERC20 tokenInterface;
if (purchaseToken == 0) tokenInterface = IERC20(USDTtoken);

uint256 ourAllowance = tokenInterface.allowance(
_msgSender(),
address(this)
);
require(usdPrice/(10**12) <= ourAllowance, "Make sure to add enough allowance");

(bool success, ) = address(tokenInterface).call(
abi.encodeWithSignature(
"transferFrom(address,address,uint256)",
_msgSender(),
dAddress,
usdPrice/(10**12)
)
);

require(success, "Token payment failed");

emit TokensBought(
_msgSender(),
amount,
address(tokenInterface),
usdPrice,
block.timestamp
);
}

function getETHAmount(uint256 amount)
external
view
returns (uint256 ETHAmount)
{
uint256 usdPrice = calculatePrice(amount);
ETHAmount = (usdPrice * (10**18)) / getETHLatestPrice();
}

function getTokenAmount(uint256 amount, uint256 purchaseToken)
external
view
returns (uint256 usdPrice)
{
usdPrice = calculatePrice(amount);
if (purchaseToken == 0 || purchaseToken == 1)
usdPrice = usdPrice / (10**12); //USDT and USDC have 6 decimals
}

function startClaim(
uint256 _claimStart,
uint256 tokensAmount,
address _saleToken
) external onlyOwner {
require(
_claimStart > endTime && _claimStart > block.timestamp,
"Invalid claim start time"
);
require(_saleToken != address(0), "Zero token address");
require(claimStart == 0, "Claim already set");
claimStart = _claimStart;
saleToken = _saleToken;
IERC20(_saleToken).transferFrom(
_msgSender(),
address(this),
tokensAmount
);
}

function claim() external whenNotPaused {
require(saleToken != address(0), "Sale token not added");
require(block.timestamp >= claimStart, "Claim has not started yet");
require(!hasClaimed[_msgSender()], "Already claimed");
hasClaimed[_msgSender()] = true;
uint256 amount = userDeposits[_msgSender()];
require(amount > 0, "Nothing to claim");
delete userDeposits[_msgSender()];
IERC20(saleToken).transfer(_msgSender(), amount);
emit TokensClaimed(_msgSender(), amount, block.timestamp);
}

function changeClaimStart(uint256 _claimStart) external onlyOwner {
require(claimStart > 0, "Initial claim data not set");
require(_claimStart > endTime, "Sale in progress");
require(_claimStart > block.timestamp, "Claim start in past");
claimStart = _claimStart;
}

function changeSaleTimes(uint256 _startTime, uint256 _endTime)
external
onlyOwner
{
require(_startTime > 0 || _endTime > 0, "Invalid parameters");

if (_startTime > 0) {
require(block.timestamp < _startTime, "Sale time in past");
startTime = _startTime;
}

if (_endTime > 0) {
require(_endTime > startTime, "Invalid endTime");
endTime = _endTime;
}
}

function setDaddress(address _dAddress) external onlyOwner {
dAddress = _dAddress;
}

function addDeposits(address[] calldata _users, uint256[] calldata _amounts) external onlyOwner {
require(_users.length == _amounts.length, "Arrays length mismatch");
for (uint256 i = 0; i < _users.length; i++) {
userDeposits[_users[i]] += _amounts[i];
}
}



function changehardcapSize(uint256 _hardcapSize) external onlyOwner {
require(
_hardcapSize > 0 && _hardcapSize != hardcapSize,
"Invalid hardcapSize size"
);
hardcapSize = _hardcapSize;
}

function changeMinimumBuyAmount(uint256 _amount) external onlyOwner {
require(_amount > 0 && _amount != minimumBuyAmount, "Invalid amount");
minimumBuyAmount = _amount;
}

function withdrawTokens(address token, uint256 amount) external onlyOwner {
IERC20(token).transfer(dAddress, amount);
}

function withdrawETHs() external onlyOwner {
(bool success, ) = payable(dAddress).call{value: address(this).balance}("");
require(success, "Failed to withdraw");
}


}