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Contract Source Code:
File 1 of 1 : ZCoreClubWhitelist.sol
// SPDX-License-Identifier: MIT 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 ^0.8.0; /** * @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 Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { 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); } } pragma solidity ^0.8.0; contract ZCoreWhitelist is Ownable{ // Represents the total number of accounts we want to have in our whitelist. // Value of this will be set with the constructor when we deploy. // uint public maxWhitelistedAddresses; // This logic creates a mapping of address to boolean // default value is false. It will be set to true when an address joins. mapping(address => bool) public whitelistedAddresses; address[] public allAddresses; // This variable will keep track of the number of whitelisted addresses. // It will increase until the maximum number is reached. uint public numAddressesWhitelisted; bool public paused = false; // Takes an input that will set the value of maxWhitelistAddress // Owner will put the value at the time of deployment constructor() { } function addAddressToWhitelist() public { require(!whitelistedAddresses[msg.sender], "Sender has already been whitelisted"); require(!paused, "The contract is paused!"); // Sets the callers address to true. // This makes it a legible whitelisted addres whitelistedAddresses[msg.sender] = true; allAddresses.push(msg.sender); // This will increase the number of whitelisted addresses numAddressesWhitelisted += 1; } function setPaused(bool _state) public onlyOwner { paused = _state; } function isUserWhiteListed(address _user) public view returns (bool) { return whitelistedAddresses[_user]; } /** function isWhiteListed() public view returns (bool) { return whitelistedAddresses[msg.sender]; } **/ }
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