Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @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. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling 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);
}
}
// SPDX-License-Identifier: MIT
// 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);
}
// SPDX-License-Identifier: MIT
// 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;
}
}
pragma solidity ^0.8.7;
import {Ownable} from "@openzeppelin/access/Ownable.sol";
import {IERC20} from "@openzeppelin/token/ERC20/IERC20.sol";
contract BonerSale is Ownable {
struct Contribution {
address addr;
uint256 amount;
}
IERC20 public immutable boner;
address public constant DEPLOYER =
0x76D1E54a65d8E786511809FBDc2c663264383952;
uint256 public constant MIN_CONTRIBUTION = .05 ether;
uint256 public constant MAX_CONTRIBUTION = 5 ether;
uint256 public constant MAX_SUPPLY = 1_000_000_000_000e18;
uint256 public constant PRESALE_SUPPLY = 700_000_000_000e18;
bool public open;
uint256 public totalContributed;
uint256 public numContributors;
mapping(uint256 => Contribution) public contribution;
mapping(address => uint256) public contributor;
constructor(IERC20 boner_) {
boner = boner_;
}
/**
* @notice Min 0.05 ether required
*/
function purchase() public payable {
require(open, "Not Open");
uint256 currentContribution = contribution[contributor[msg.sender]]
.amount;
// contribution limits
require(msg.value >= MIN_CONTRIBUTION, "Below Minimum Contribution");
require(
msg.value + currentContribution <= MAX_CONTRIBUTION,
"Above Maximum Contribution"
);
// find or create the contributor
uint256 contributionIndex;
if (contributor[msg.sender] != 0) {
contributionIndex = contributor[msg.sender];
} else {
contributionIndex = numContributors + 1;
numContributors++;
}
contributor[msg.sender] = contributionIndex;
contribution[contributionIndex].addr = msg.sender;
contribution[contributionIndex].amount += msg.value;
totalContributed += msg.value;
}
function airdrop() external onlyOwner {
uint256 pricePerToken = (totalContributed * 10e18) / PRESALE_SUPPLY;
for (uint256 i = 1; i <= numContributors; i++) {
uint256 contributionAmount = contribution[i].amount * 10e18;
uint256 numberOfTokensToMint = contributionAmount / pricePerToken;
boner.transfer(contribution[i].addr, numberOfTokensToMint);
}
}
function toggle() external onlyOwner {
open = !open;
}
function refund() external onlyOwner {
for (uint256 i = 1; i <= numContributors; i++) {
address payable refundAddress = payable(contribution[i].addr);
refundAddress.transfer(contribution[i].amount);
}
}
function withdraw() external onlyOwner {
(bool success, ) = payable(DEPLOYER).call{value: address(this).balance}(
""
);
require(success, "Withdraw failed");
}
function withdrawERC20() external onlyOwner {
uint256 balance = boner.balanceOf(address(this));
if (balance > 0) {
boner.transfer(DEPLOYER, balance);
}
}
}