Description:
Proxy contract enabling upgradeable smart contract patterns. Delegates calls to an implementation contract.
Blockchain: Ethereum
Source Code: View Code On The Blockchain
Solidity Source Code:
// File: @openzeppelin/contracts/security/ReentrancyGuard.sol
// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)
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: @openzeppelin/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)
pragma solidity >=0.4.16;
/**
* @dev Interface of the ERC-20 standard as defined in the ERC.
*/
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 value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` 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 value) external returns (bool);
}
// File: @openzeppelin/contracts/interfaces/IERC20.sol
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC20.sol)
pragma solidity >=0.4.16;
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts (last updated v5.4.0) (utils/introspection/IERC165.sol)
pragma solidity >=0.4.16;
/**
* @dev Interface of the ERC-165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[ERC].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/interfaces/IERC165.sol
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC165.sol)
pragma solidity >=0.4.16;
// File: @openzeppelin/contracts/interfaces/IERC1363.sol
// OpenZeppelin Contracts (last updated v5.4.0) (interfaces/IERC1363.sol)
pragma solidity >=0.6.2;
/**
* @title IERC1363
* @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
*
* Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
* after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
*/
interface IERC1363 is IERC20, IERC165 {
/*
* Note: the ERC-165 identifier for this interface is 0xb0202a11.
* 0xb0202a11 ===
* bytes4(keccak256('transferAndCall(address,uint256)')) ^
* bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
* bytes4(keccak256('approveAndCall(address,uint256)')) ^
* bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
*/
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferAndCall(address to, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @param data Additional data with no specified format, sent in call to `to`.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param from The address which you want to send tokens from.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferFromAndCall(address from, address to, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param from The address which you want to send tokens from.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @param data Additional data with no specified format, sent in call to `to`.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function approveAndCall(address spender, uint256 value) external returns (bool);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
* @param data Additional data with no specified format, sent in call to `spender`.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}
// File: @openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol
// OpenZeppelin Contracts (last updated v5.3.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.20;
/**
* @title SafeERC20
* @dev Wrappers around ERC-20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
/**
* @dev An operation with an ERC-20 token failed.
*/
error SafeERC20FailedOperation(address token);
/**
* @dev Indicates a failed `decreaseAllowance` request.
*/
error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);
/**
* @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
}
/**
* @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
* calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
*/
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
}
/**
* @dev Variant of {safeTransfer} that returns a bool instead of reverting if the operation is not successful.
*/
function trySafeTransfer(IERC20 token, address to, uint256 value) internal returns (bool) {
return _callOptionalReturnBool(token, abi.encodeCall(token.transfer, (to, value)));
}
/**
* @dev Variant of {safeTransferFrom} that returns a bool instead of reverting if the operation is not successful.
*/
function trySafeTransferFrom(IERC20 token, address from, address to, uint256 value) internal returns (bool) {
return _callOptionalReturnBool(token, abi.encodeCall(token.transferFrom, (from, to, value)));
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*
* IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
* smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
* this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
* that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
forceApprove(token, spender, oldAllowance + value);
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
* value, non-reverting calls are assumed to be successful.
*
* IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
* smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
* this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
* that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
*/
function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
unchecked {
uint256 currentAllowance = token.allowance(address(this), spender);
if (currentAllowance < requestedDecrease) {
revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
}
forceApprove(token, spender, currentAllowance - requestedDecrease);
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
* to be set to zero before setting it to a non-zero value, such as USDT.
*
* NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
* only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
* set here.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
* code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
* targeting contracts.
*
* Reverts if the returned value is other than `true`.
*/
function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
if (to.code.length == 0) {
safeTransfer(token, to, value);
} else if (!token.transferAndCall(to, value, data)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
* has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
* targeting contracts.
*
* Reverts if the returned value is other than `true`.
*/
function transferFromAndCallRelaxed(
IERC1363 token,
address from,
address to,
uint256 value,
bytes memory data
) internal {
if (to.code.length == 0) {
safeTransferFrom(token, from, to, value);
} else if (!token.transferFromAndCall(from, to, value, data)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
* code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
* targeting contracts.
*
* NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
* Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
* once without retrying, and relies on the returned value to be true.
*
* Reverts if the returned value is other than `true`.
*/
function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
if (to.code.length == 0) {
forceApprove(token, to, value);
} else if (!token.approveAndCall(to, value, data)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*
* This is a variant of {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
uint256 returnSize;
uint256 returnValue;
assembly ("memory-safe") {
let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
// bubble errors
if iszero(success) {
let ptr := mload(0x40)
returndatacopy(ptr, 0, returndatasize())
revert(ptr, returndatasize())
}
returnSize := returndatasize()
returnValue := mload(0)
}
if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*
* This is a variant of {_callOptionalReturn} that silently catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
bool success;
uint256 returnSize;
uint256 returnValue;
assembly ("memory-safe") {
success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
returnSize := returndatasize()
returnValue := mload(0)
}
return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
}
}
// File: AIGNPresale.sol
pragma solidity ^0.8.20;
interface AggregatorV3Interface {
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function version() external view returns (uint256);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 price,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
}
contract AIGNPresale is ReentrancyGuard {
using SafeERC20 for IERC20;
address public owner;
address public immutable aignToken;
address public treasuryWallet;
// Use SafeERC20 for USDT token
IERC20 public immutable usdtToken;
// Chainlink ETH/USD price oracle (Sepolia testnet)
AggregatorV3Interface internal immutable ethUsdPriceFeed;
uint256 public currentStage = 1;
uint256 public constant TOTAL_STAGES = 30;
uint256 public constant OVERSELL_PERCENTAGE = 25; // 25% oversell allowed per stage
bool public saleActive = true;
// Bonus control variables
uint256 public constant DEFAULT_MAX_BONUS = 10; // Default maximum 10% bonus
uint256 public currentMaxBonus = DEFAULT_MAX_BONUS; // Current maximum bonus
bool public bonusEnabled = true; // Bonus function enabled by default for email collection
// Global tracking for total tokens sold
uint256 public totalTokensSold = 0;
uint256 public constant TOTAL_PRESALE_TOKENS = 2000000000 * 10 ** 18; // 2 billion tokens
// Stage information
struct StageInfo {
uint256 priceUSD; // Price in USD (4 decimals: $0.001 = 1000)
uint256 tokenAmount; // Base tokens available per stage
uint256 tokensSold; // Actual tokens sold (can exceed tokenAmount by 25%)
uint256 fundCreditedUSD; // USD value credited this stage (6 decimals) - includes bonus
uint256 fundPaidUSD; // USD actually paid this stage (6 decimals) - real money received
bool isPrivateSale; // First 5 stages are private sale
}
struct PurchaseResult {
uint256 actualCostUSD;
uint256 creditedUSD; // New: Calculation value (including bonus)
uint256 tokensToBuy;
}
mapping(uint256 => StageInfo) public stages;
mapping(address => uint256) public userPurchases;
mapping(uint256 => uint256) public stagePurchaseLimits;
mapping(uint256 => mapping(address => uint256)) public userStageCredited; // Token value obtained at what calculation value
mapping(uint256 => mapping(address => uint256)) public userStagePaid; // Actual amount paid
// Claim system
mapping(address => uint256) public claimableTokens; // User claimable tokens
bool public claimEnabled = false; // Whether claim is enabled
event TokensPurchased(
address indexed buyer,
uint256 stage,
uint256 tokensAmount,
uint256 paidUSD, // Actual payment
uint256 creditedUSD, // Calculation value (including bonus)
string paymentMethod
);
event StageCompleted(uint256 stage);
event StageChanged(uint256 newStage);
event ETHPriceUpdated(uint256 newPrice);
event BonusSettingsChanged(uint256 newMaxBonus, bool enabled);
event TokensClaimed(address indexed user, uint256 amount);
event ClaimStatusChanged(bool enabled);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
modifier onlyOwner() {
require(msg.sender == owner, "Only owner");
_;
}
modifier saleIsActive() {
require(saleActive, "Sale is not active");
_;
}
constructor(
address _aignToken,
address _usdtToken,
address _treasuryWallet
) {
// check zero address
require(_aignToken != address(0), "Invalid token");
require(_usdtToken != address(0), "Invalid USDT");
require(_treasuryWallet != address(0), "Invalid treasury");
owner = msg.sender;
aignToken = _aignToken;
usdtToken = IERC20(_usdtToken);
treasuryWallet = _treasuryWallet;
// Ethereum ETH/USD price oracle address
ethUsdPriceFeed = AggregatorV3Interface(
0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419
);
_initializeStages();
_initializePurchaseLimits();
}
function _initializeStages() private {
// Private Sale Stages (1-5)
stages[1] = StageInfo(1000, 66666667 * 10 ** 18, 0, 0, 0, true); // $0.001
stages[2] = StageInfo(1200, 66666667 * 10 ** 18, 0, 0, 0, true); // $0.0012
stages[3] = StageInfo(1400, 66666667 * 10 ** 18, 0, 0, 0, true); // $0.0014
stages[4] = StageInfo(1600, 66666667 * 10 ** 18, 0, 0, 0, true); // $0.0016
stages[5] = StageInfo(1800, 66666667 * 10 ** 18, 0, 0, 0, true); // $0.0018
// Pre Sale Stages (6-30)
stages[6] = StageInfo(2400, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0024
stages[7] = StageInfo(3000, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.003
stages[8] = StageInfo(3600, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0036
stages[9] = StageInfo(4200, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0042
stages[10] = StageInfo(4800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0048
stages[11] = StageInfo(5800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0058
stages[12] = StageInfo(6800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0068
stages[13] = StageInfo(7800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0078
stages[14] = StageInfo(8800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0088
stages[15] = StageInfo(9800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0098
stages[16] = StageInfo(10800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0108
stages[17] = StageInfo(11800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0118
stages[18] = StageInfo(12800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0128
stages[19] = StageInfo(13800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0138
stages[20] = StageInfo(14800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0148
stages[21] = StageInfo(16800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0168
stages[22] = StageInfo(18800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0188
stages[23] = StageInfo(20800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0208
stages[24] = StageInfo(22800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0228
stages[25] = StageInfo(24800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0248
stages[26] = StageInfo(26800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0268
stages[27] = StageInfo(28800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0288
stages[28] = StageInfo(30800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0308
stages[29] = StageInfo(32800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0328
stages[30] = StageInfo(34800, 66666667 * 10 ** 18, 0, 0, 0, false); // $0.0348
}
function _initializePurchaseLimits() private {
for (uint256 i = 1; i <= TOTAL_STAGES; i++) {
stagePurchaseLimits[i] = 1000000 * 10 ** 6; // $1,000,000 max per user per stage
}
}
function getETHPrice() public view returns (uint256) {
(, int256 price, , uint256 updatedAt, ) = ethUsdPriceFeed
.latestRoundData();
require(price > 0, "Invalid price from oracle");
require(block.timestamp - updatedAt <= 3600, "Price data too old");
return uint256(price) * 10 ** 10;
}
function usdToEth(
uint256 usdAmount,
uint256 ethPrice
) public pure returns (uint256) {
return (usdAmount * 10 ** 18) / (ethPrice / 10 ** 12);
}
function ethToUsd(
uint256 ethAmount,
uint256 ethPrice
) public pure returns (uint256) {
return (ethAmount * ethPrice) / 10 ** 30; // ethAmount * ethPrice / 1e30 = USD value in 6 decimals
}
function buyWithETH() external payable nonReentrant saleIsActive {
require(msg.value > 0, "Must send ETH");
require(currentStage <= TOTAL_STAGES, "Sale ended");
uint256 ethPrice = getETHPrice();
uint256 usdValue = ethToUsd(msg.value, ethPrice);
require(usdValue >= 10 * 10 ** 6, "Minimum purchase is $10");
PurchaseResult memory result = _calculatePurchase(msg.sender, usdValue);
// Update state first (CEI pattern)
_updatePurchaseState(msg.sender, result);
// Transfer ETH to treasury (no refunds in simplified logic)
(bool success, ) = payable(treasuryWallet).call{value: msg.value}("");
require(success, "ETH transfer to treasury failed");
// Tokens are now added to claimableTokens in _updatePurchaseState()
emit TokensPurchased(
msg.sender,
currentStage,
result.tokensToBuy,
usdValue,
result.creditedUSD,
"ETH"
);
}
function buyWithETHBonus(
uint256 tokenCalculationValueUSD
) external payable nonReentrant saleIsActive {
require(bonusEnabled, "Bonus purchases are currently disabled");
require(msg.value > 0, "Must send ETH");
require(
tokenCalculationValueUSD > 0,
"Must specify calculation amount"
);
require(currentStage <= TOTAL_STAGES, "Sale ended");
uint256 ethPrice = getETHPrice();
uint256 usdValue = ethToUsd(msg.value, ethPrice);
require(usdValue >= 10 * 10 ** 6, "Minimum purchase is $10");
// Core bonus validation logic
uint256 maxAllowedCalculation = (usdValue * (100 + currentMaxBonus)) /
100;
require(
tokenCalculationValueUSD <= maxAllowedCalculation,
"Bonus exceeds current maximum"
);
require(
tokenCalculationValueUSD >= usdValue,
"Invalid bonus calculation"
);
// Use bonus-specific calculation function
PurchaseResult memory result = _calculateBonusPurchase(
msg.sender,
usdValue, // Actual USD amount paid
tokenCalculationValueUSD // Bonus calculation amount
);
// Update state using the bonus calculation amount
_updatePurchaseState(msg.sender, result);
// Transfer actual ETH sent by user
(bool success, ) = payable(treasuryWallet).call{value: msg.value}("");
require(success, "ETH transfer to treasury failed");
// Tokens are now added to claimableTokens in _updatePurchaseState()
emit TokensPurchased(
msg.sender,
currentStage,
result.tokensToBuy,
result.actualCostUSD,
result.creditedUSD,
"ETH"
);
}
function buyWithUSDT(
uint256 usdtAmount
) external nonReentrant saleIsActive {
require(usdtAmount > 0, "Must specify USDT amount");
require(currentStage <= TOTAL_STAGES, "Sale ended");
require(usdtAmount >= 10 * 10 ** 6, "Minimum purchase is $10");
PurchaseResult memory result = _calculatePurchase(
msg.sender,
usdtAmount
);
// Update state first (CEI pattern)
_updatePurchaseState(msg.sender, result);
// Transfer USDT from user to treasury
usdtToken.safeTransferFrom(msg.sender, treasuryWallet, usdtAmount);
// Tokens are added to claimableTokens in _updatePurchaseState()
emit TokensPurchased(
msg.sender,
currentStage,
result.tokensToBuy,
result.actualCostUSD,
result.creditedUSD,
"USDT"
);
}
function buyWithUSDTBonus(
uint256 paymentAmount,
uint256 tokenCalculationAmount
) external nonReentrant saleIsActive {
require(bonusEnabled, "Bonus purchases are currently disabled");
require(paymentAmount > 0, "Must specify payment amount");
require(tokenCalculationAmount > 0, "Must specify calculation amount");
require(currentStage <= TOTAL_STAGES, "Sale ended");
require(paymentAmount >= 10 * 10 ** 6, "Minimum purchase is $10");
// Core bonus validation logic
uint256 maxAllowedCalculation = (paymentAmount *
(100 + currentMaxBonus)) / 100;
require(
tokenCalculationAmount <= maxAllowedCalculation,
"Bonus exceeds current maximum"
);
require(
tokenCalculationAmount >= paymentAmount,
"Invalid bonus calculation"
);
// Use bonus-specific calculation function
PurchaseResult memory result = _calculateBonusPurchase(
msg.sender,
paymentAmount, // Actual payment amount
tokenCalculationAmount // Bonus calculation amount
);
// Update state using the bonus calculation amount
_updatePurchaseState(msg.sender, result);
// But only charge the user the payment amount
usdtToken.safeTransferFrom(msg.sender, treasuryWallet, paymentAmount);
// Tokens are added to claimableTokens in _updatePurchaseState()
emit TokensPurchased(
msg.sender,
currentStage,
result.tokensToBuy,
result.actualCostUSD,
result.creditedUSD,
"USDT"
);
}
function _calculatePurchase(
address buyer,
uint256 usdAmount
) private returns (PurchaseResult memory) {
_autoAdvanceStageIfNeeded();
require(currentStage <= TOTAL_STAGES, "All stages completed");
StageInfo memory stage = stages[currentStage];
// Limit check: use credited amount (prevent bypassing limits through small payments to get large amounts of tokens)
require(
userStageCredited[currentStage][buyer] + usdAmount <=
stagePurchaseLimits[currentStage],
"Exceeds stage purchase limit"
);
// Calculate tokens based on USD amount and current stage price
uint256 requestedTokens = (usdAmount * 10 ** 18) / stage.priceUSD;
require(requestedTokens > 0, "Purchase amount too small");
// Check only current stage 25% oversell limit (global limit is automatically maintained)
uint256 stageMaxTokens = (stage.tokenAmount *
(100 + OVERSELL_PERCENTAGE)) / 100;
require(
stage.tokensSold + requestedTokens <= stageMaxTokens,
"Exceeds stage oversell limit"
);
// Normal purchase: payment amount = calculation amount
return
PurchaseResult({
actualCostUSD: usdAmount,
creditedUSD: usdAmount,
tokensToBuy: requestedTokens
});
}
function _calculateBonusPurchase(
address buyer,
uint256 paymentAmount,
uint256 calculationAmount
) private returns (PurchaseResult memory) {
_autoAdvanceStageIfNeeded();
require(currentStage <= TOTAL_STAGES, "All stages completed");
StageInfo memory stage = stages[currentStage];
// Limit check: use credited amount (calculation value) instead of payment amount
// This prevents users from bypassing limits through small payment + high bonus to get large amounts of tokens
require(
userStageCredited[currentStage][buyer] + calculationAmount <=
stagePurchaseLimits[currentStage],
"Exceeds stage purchase limit"
);
// Calculate tokens based on the bonus calculation amount
uint256 requestedTokens = (calculationAmount * 10 ** 18) /
stage.priceUSD;
require(requestedTokens > 0, "Purchase amount too small");
// Check oversell limit based on calculated tokens
uint256 stageMaxTokens = (stage.tokenAmount *
(100 + OVERSELL_PERCENTAGE)) / 100;
require(
stage.tokensSold + requestedTokens <= stageMaxTokens,
"Exceeds stage oversell limit"
);
return
PurchaseResult({
actualCostUSD: paymentAmount, // Actual payment amount
creditedUSD: calculationAmount, // Calculation value (including bonus)
tokensToBuy: requestedTokens
});
}
function _autoAdvanceStageIfNeeded() private {
// STAGE ADVANCE PATH 1: Alignment only
// Advances currentStage to the first stage that hasn't reached its base capacity
// This ensures currentStage reflects the actual state before processing new purchases
while (
currentStage <= TOTAL_STAGES &&
stages[currentStage].tokensSold >= stages[currentStage].tokenAmount
) {
if (currentStage < TOTAL_STAGES) {
currentStage++;
emit StageChanged(currentStage);
} else {
saleActive = false;
break;
}
}
}
function _updatePurchaseState(
address buyer,
PurchaseResult memory result
) private {
// Update stage data
StageInfo storage stage = stages[currentStage];
stage.tokensSold += result.tokensToBuy;
stage.fundCreditedUSD += result.creditedUSD; // Calculation value
stage.fundPaidUSD += result.actualCostUSD; // Actual money received
// Update user data
userPurchases[buyer] += result.tokensToBuy;
userStageCredited[currentStage][buyer] += result.creditedUSD; // Record credited value
userStagePaid[currentStage][buyer] += result.actualCostUSD; // Record actual payment
totalTokensSold += result.tokensToBuy;
// Record claimable tokens instead of direct transfer
claimableTokens[buyer] += result.tokensToBuy;
// STAGE ADVANCE PATH 2: Post-transaction advancement
// Advances currentStage if THIS transaction caused the stage to reach its base capacity
// This prepares currentStage for the next transaction
if (stage.tokensSold >= stage.tokenAmount) {
emit StageCompleted(currentStage);
// Advance to next stage
if (currentStage < TOTAL_STAGES) {
currentStage++;
emit StageChanged(currentStage);
} else {
saleActive = false;
}
}
// Final check for sale completion
if (currentStage > TOTAL_STAGES) {
saleActive = false;
}
}
function getCurrentStage() external view returns (uint256) {
return currentStage;
}
function getStageInfo(
uint256 stageId
)
external
view
returns (
uint256 priceInUSD,
uint256 baseTokenAmount,
uint256 tokensSold,
uint256 fundCreditedUSD, // USD for token calculation
uint256 fundPaidUSD, // actual received payment
bool isPrivateSale,
uint256 tokensRemaining // Base remaining tokens
)
{
require(stageId >= 1 && stageId <= TOTAL_STAGES, "Invalid stage");
StageInfo memory stage = stages[stageId];
// Simple calculation: base amount minus sold amount, show 0 if negative (oversold)
uint256 remaining = stage.tokensSold < stage.tokenAmount
? stage.tokenAmount - stage.tokensSold
: 0;
return (
stage.priceUSD,
stage.tokenAmount,
stage.tokensSold,
stage.fundCreditedUSD,
stage.fundPaidUSD,
stage.isPrivateSale,
remaining
);
}
// Calculate tokens for USDT purchase
function calculateTokensForUSDT(
uint256 usdtAmount
) external view returns (uint256) {
StageInfo memory stage = stages[currentStage];
return (usdtAmount * 10 ** 18) / stage.priceUSD;
}
// Calculate tokens for ETH purchase
function calculateTokensForETH(
uint256 ethAmount
) external view returns (uint256) {
uint256 ethPrice = getETHPrice();
uint256 usdValue = ethToUsd(ethAmount, ethPrice);
StageInfo memory stage = stages[currentStage];
return (usdValue * 10 ** 18) / stage.priceUSD;
}
function getUserRemainingLimit(
address user,
uint256 stageId
) external view returns (uint256) {
return stagePurchaseLimits[stageId] - userStageCredited[stageId][user];
}
function getUserStageInfo(
address user,
uint256 stageId
)
external
view
returns (
uint256 creditedAmount, // Token value obtained at what calculation value
uint256 paidAmount, // Actual amount paid
uint256 remainingLimit // Remaining limit
)
{
return (
userStageCredited[stageId][user],
userStagePaid[stageId][user],
stagePurchaseLimits[stageId] - userStageCredited[stageId][user]
);
}
function getStagePurchaseLimit(
uint256 stageId
) external view returns (uint256) {
return stagePurchaseLimits[stageId];
}
function isSaleActive() external view returns (bool) {
return saleActive;
}
// New: Query bonus settings
function getBonusSettings()
external
view
returns (uint256 maxBonus, bool enabled)
{
return (currentMaxBonus, bonusEnabled);
}
// Claim system functions
function claim() external {
require(claimEnabled, "Claim not yet enabled");
uint256 amount = claimableTokens[msg.sender];
require(amount > 0, "No tokens to claim");
claimableTokens[msg.sender] = 0;
IERC20(aignToken).safeTransfer(msg.sender, amount);
emit TokensClaimed(msg.sender, amount);
}
function setClaimEnabled(bool enabled) external onlyOwner {
claimEnabled = enabled;
emit ClaimStatusChanged(enabled);
}
function getClaimableAmount(address user) external view returns (uint256) {
return claimableTokens[user];
}
function isClaimEnabled() external view returns (bool) {
return claimEnabled;
}
// Get overall oversell status - OWNER ONLY
function getOversellStatus()
external
view
onlyOwner
returns (
uint256 totalSold,
uint256 globalOversellPercentage,
uint256 actualLimit
)
{
uint256 oversellPercentage = totalTokensSold > TOTAL_PRESALE_TOKENS
? ((totalTokensSold - TOTAL_PRESALE_TOKENS) * 100) /
TOTAL_PRESALE_TOKENS
: 0;
uint256 maxLimit = (TOTAL_PRESALE_TOKENS *
(100 + OVERSELL_PERCENTAGE)) / 100;
return (totalTokensSold, oversellPercentage, maxLimit);
}
// Get cumulative funds raised from stage 1 to specified stage
function getCumulativeFundsRaised(
uint256 upToStage
)
external
view
returns (
uint256 totalCredited, // Total calculation value
uint256 totalPaid // Total actual income
)
{
require(upToStage >= 1 && upToStage <= TOTAL_STAGES, "Invalid stage");
uint256 credited = 0;
uint256 paid = 0;
for (uint256 i = 1; i <= upToStage; i++) {
credited += stages[i].fundCreditedUSD;
paid += stages[i].fundPaidUSD;
}
return (credited, paid);
}
// Calculate total target funds
function getCumulativeTargetFunds(
uint256 upToStage
) external view returns (uint256) {
require(upToStage >= 1 && upToStage <= TOTAL_STAGES, "Invalid stage");
uint256 totalTargetFunds = 0;
for (uint256 i = 1; i <= upToStage; i++) {
// Each target fund = tokenAmount * priceUSD
// tokenAmount is 66666667 * 10**18, priceUSD has 4 digits (e.g. 1000 is $0.001)
// Result needs to be in 6 decimal USD format
uint256 stageTarget = (stages[i].tokenAmount * stages[i].priceUSD) /
10 ** 18;
totalTargetFunds += stageTarget;
}
return totalTargetFunds;
}
// Owner functions
function setStage(uint256 newStage) external onlyOwner {
require(newStage >= 1 && newStage <= TOTAL_STAGES, "Invalid stage");
currentStage = newStage;
emit StageChanged(newStage);
}
function adjustFundRaised(
uint256 stageId,
uint256 newCreditedAmount,
uint256 newPaidAmount
) external onlyOwner {
require(stageId >= 1 && stageId <= TOTAL_STAGES, "Invalid stage");
stages[stageId].fundCreditedUSD = newCreditedAmount;
stages[stageId].fundPaidUSD = newPaidAmount;
}
function adjustTokensSold(
uint256 stageId,
uint256 newAmount
) external onlyOwner {
require(stageId >= 1 && stageId <= TOTAL_STAGES, "Invalid stage");
// For manual adjustments (like private sales), only allow up to base amount
// Oversell should only happen through normal purchase flow, not manual adjustment
require(
newAmount <= stages[stageId].tokenAmount,
"Manual adjustment cannot exceed base stage limit"
);
// Update global total
totalTokensSold =
totalTokensSold -
stages[stageId].tokensSold +
newAmount;
stages[stageId].tokensSold = newAmount;
// Emit StageCompleted event if stage meets base requirement
if (newAmount >= stages[stageId].tokenAmount) {
emit StageCompleted(stageId);
}
}
function setSaleActive(bool active) external onlyOwner {
saleActive = active;
}
function setPurchaseLimit(
uint256 stageId,
uint256 newLimit
) external onlyOwner {
require(stageId >= 1 && stageId <= TOTAL_STAGES, "Invalid stage");
stagePurchaseLimits[stageId] = newLimit;
}
function setTreasuryWallet(address newTreasury) external onlyOwner {
treasuryWallet = newTreasury;
}
// add onwership transfer
function transferOwnership(address newOwner) external onlyOwner {
require(newOwner != address(0), "New owner is zero address");
require(newOwner != owner, "New owner is current owner");
address oldOwner = owner;
owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
// New: Bonus control functions
function setBonusSettings(
uint256 newMaxBonus,
bool enabled
) external onlyOwner {
require(newMaxBonus <= 50, "Bonus cannot exceed 50%"); // Hard limit 50%
currentMaxBonus = newMaxBonus;
bonusEnabled = enabled;
emit BonusSettingsChanged(newMaxBonus, enabled);
}
function disableBonus() external onlyOwner {
bonusEnabled = false;
emit BonusSettingsChanged(currentMaxBonus, false);
}
function enableBonus() external onlyOwner {
bonusEnabled = true;
emit BonusSettingsChanged(currentMaxBonus, true);
}
// Unified funds recovery function
function recoverFunds(address token, uint256 amount) external onlyOwner {
if (token == address(0)) {
// Withdraw ETH
uint256 ethAmount = amount == 0 ? address(this).balance : amount;
require(treasuryWallet != address(0), "Invalid treasury");
(bool success, ) = payable(treasuryWallet).call{value: ethAmount}(
""
);
require(success, "ETH withdrawal failed");
} else {
// Withdraw ERC20 tokens (USDT / AIGN / other mistakenly sent tokens)
uint256 tokenAmount = amount == 0
? IERC20(token).balanceOf(address(this))
: amount;
IERC20(token).safeTransfer(treasuryWallet, tokenAmount);
}
}
}Submitted on: 2025-10-07 10:06:31
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