Transaction Hash:
Block:
21260436 at Nov-24-2024 09:57:47 PM +UTC
Transaction Fee:
0.000469772680900206 ETH
$1.06
Gas Used:
46,681 Gas / 10.063466526 Gwei
Emitted Events:
319 |
Earth.Approval( owner=[Sender] 0xf5406f229422905208eb4e976400163c79f51a54, spender=0x00000000...43aC78BA3, value=115792089237316195423570985008687907853269984665640564039457584007913129639935 )
|
Account State Difference:
Address | Before | After | State Difference | ||
---|---|---|---|---|---|
0x4838B106...B0BAD5f97
Miner
| (Titan Builder) | 10.292767557469646602 Eth | 10.292860919469646602 Eth | 0.000093362 | |
0xbf5Badfa...60b8A1e0c | |||||
0xf5406f22...C79F51A54 |
0.00819847648225701 Eth
Nonce: 6
|
0.007728703801356804 Eth
Nonce: 7
| 0.000469772680900206 |
Execution Trace
Earth.approve( spender=0x000000000022D473030F116dDEE9F6B43aC78BA3, value=115792089237316195423570985008687907853269984665640564039457584007913129639935 ) => ( True )
// SPDX-License-Identifier: MIT pragma solidity 0.8.25; /* Web: https://www.pale-blue.earth Twitter: https://twitter.com/palebluedoteth Telegram: https://t.me/palebluedoteth */ /** * @dev Interface for the DEX version 2 factory contract */ interface IDexV2Factory { function createPair( address tokenA, address tokenB ) external returns (address pair); function getPair( address tokenA, address tokenB ) external view returns (address pair); } /** * @dev Interface for the DEX version 2 router contract */ interface IDexV2Router { function factory() external pure returns (address); function WETH() external pure returns (address); function swapExactTokensForETHSupportingFeeOnTransferTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external; } /** * @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; } } /** * @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 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); } /** * @dev Interface for the optional metadata functions from the ERC20 standard. */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); } /** * @dev Standard ERC20 Errors * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens. */ interface IERC20Errors { /** * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. * @param balance Current balance for the interacting account. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientBalance( address sender, uint256 balance, uint256 needed ); /** * @dev Indicates a failure with the token `sender`. Used in transfers. * @param sender Address whose tokens are being transferred. */ error ERC20InvalidSender(address sender); /** * @dev Indicates a failure with the token `receiver`. Used in transfers. * @param receiver Address to which tokens are being transferred. */ error ERC20InvalidReceiver(address receiver); /** * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers. * @param spender Address that may be allowed to operate on tokens without being their owner. * @param allowance Amount of tokens a `spender` is allowed to operate with. * @param needed Minimum amount required to perform a transfer. */ error ERC20InsufficientAllowance( address spender, uint256 allowance, uint256 needed ); /** * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals. * @param approver Address initiating an approval operation. */ error ERC20InvalidApprover(address approver); /** * @dev Indicates a failure with the `spender` to be approved. Used in approvals. * @param spender Address that may be allowed to operate on tokens without being their owner. */ error ERC20InvalidSpender(address spender); } /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * * TIP: For a detailed writeup see our guide * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * The default value of {decimals} is 18. To change this, you should override * this function so it returns a different value. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. */ abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors { mapping(address account => uint256) private _balances; mapping(address account => mapping(address spender => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the default value returned by this function, unless * it's overridden. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `to` cannot be the zero address. * - the caller must have a balance of at least `value`. */ function transfer(address to, uint256 value) public virtual returns (bool) { address owner = _msgSender(); _transfer(owner, to, value); return true; } /** * @dev See {IERC20-allowance}. */ function allowance( address owner, address spender ) public view virtual returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * NOTE: If `value` is the maximum `uint256`, the allowance is not updated on * `transferFrom`. This is semantically equivalent to an infinite approval. * * Requirements: * * - `spender` cannot be the zero address. */ function approve( address spender, uint256 value ) public virtual returns (bool) { address owner = _msgSender(); _approve(owner, spender, value); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * NOTE: Does not update the allowance if the current allowance * is the maximum `uint256`. * * Requirements: * * - `from` and `to` cannot be the zero address. * - `from` must have a balance of at least `value`. * - the caller must have allowance for ``from``'s tokens of at least * `value`. */ function transferFrom( address from, address to, uint256 value ) public virtual returns (bool) { address spender = _msgSender(); _spendAllowance(from, spender, value); _transfer(from, to, value); return true; } /** * @dev Moves a `value` amount of tokens from `from` to `to`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _transfer(address from, address to, uint256 value) internal { if (from == address(0)) { revert ERC20InvalidSender(address(0)); } if (to == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(from, to, value); } /** * @dev Transfers a `value` amount of tokens from `from` to `to`, or alternatively mints (or burns) if `from` * (or `to`) is the zero address. All customizations to transfers, mints, and burns should be done by overriding * this function. * * Emits a {Transfer} event. */ function _update(address from, address to, uint256 value) internal virtual { if (from == address(0)) { // Overflow check required: The rest of the code assumes that totalSupply never overflows _totalSupply += value; } else { uint256 fromBalance = _balances[from]; if (fromBalance < value) { revert ERC20InsufficientBalance(from, fromBalance, value); } unchecked { // Overflow not possible: value <= fromBalance <= totalSupply. _balances[from] = fromBalance - value; } } if (to == address(0)) { unchecked { // Overflow not possible: value <= totalSupply or value <= fromBalance <= totalSupply. _totalSupply -= value; } } else { unchecked { // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256. _balances[to] += value; } } emit Transfer(from, to, value); } /** * @dev Creates a `value` amount of tokens and assigns them to `account`, by transferring it from address(0). * Relies on the `_update` mechanism * * Emits a {Transfer} event with `from` set to the zero address. * * NOTE: This function is not virtual, {_update} should be overridden instead. */ function _mint(address account, uint256 value) internal { if (account == address(0)) { revert ERC20InvalidReceiver(address(0)); } _update(address(0), account, value); } /** * @dev Sets `value` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. * * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument. */ function _approve(address owner, address spender, uint256 value) internal { _approve(owner, spender, value, true); } /** * @dev Variant of {_approve} with an optional flag to enable or disable the {Approval} event. * * By default (when calling {_approve}) the flag is set to true. On the other hand, approval changes made by * `_spendAllowance` during the `transferFrom` operation set the flag to false. This saves gas by not emitting any * `Approval` event during `transferFrom` operations. * * Anyone who wishes to continue emitting `Approval` events on the`transferFrom` operation can force the flag to * true using the following override: * ``` * function _approve(address owner, address spender, uint256 value, bool) internal virtual override { * super._approve(owner, spender, value, true); * } * ``` * * Requirements are the same as {_approve}. */ function _approve( address owner, address spender, uint256 value, bool emitEvent ) internal virtual { if (owner == address(0)) { revert ERC20InvalidApprover(address(0)); } if (spender == address(0)) { revert ERC20InvalidSpender(address(0)); } _allowances[owner][spender] = value; if (emitEvent) { emit Approval(owner, spender, value); } } /** * @dev Updates `owner` s allowance for `spender` based on spent `value`. * * Does not update the allowance value in case of infinite allowance. * Revert if not enough allowance is available. * * Does not emit an {Approval} event. */ function _spendAllowance( address owner, address spender, uint256 value ) internal virtual { uint256 currentAllowance = allowance(owner, spender); if (currentAllowance != type(uint256).max) { if (currentAllowance < value) { revert ERC20InsufficientAllowance( spender, currentAllowance, value ); } unchecked { _approve(owner, spender, currentAllowance - value, false); } } } } /** * @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. * * The initial owner is set to the address provided by the deployer. 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; /** * @dev The caller account is not authorized to perform an operation. */ error OwnableUnauthorizedAccount(address account); /** * @dev The owner is not a valid owner account. (eg. `address(0)`) */ error OwnableInvalidOwner(address owner); event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev Initializes the contract setting the address provided by the deployer as the initial owner. */ constructor(address initialOwner) { if (initialOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _transferOwnership(initialOwner); } /** * @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 { if (owner() != _msgSender()) { revert OwnableUnauthorizedAccount(_msgSender()); } } /** * @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 { if (newOwner == address(0)) { revert OwnableInvalidOwner(address(0)); } _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); } } /** * @dev ERC20 token with taxation and liquidity swap functionalities. */ contract Earth is ERC20, Ownable { address public earthFundWallet = 0xdA3E8FdF2ca1c6372DFcFA5f0c5a3dF76E3946AE; address public operationsWallet = 0x474A3F2C5420535c3cC0d93cfDa34C59Ad6d48A1; uint256 public maxBuySellLimit = 1 * 10 ** 16; uint256 public maxWalletLimit = 2 * 10 ** 16; string public earthFundTax = "1.5%"; string public operationsTax = "0.5%"; uint8 private _earthFundTax = 15; uint8 private _operationsTax = 5; bool private _inSwapAndLiquify; mapping(address => bool) public isExcludedFromTax; mapping(address => bool) public isExcludedFromMaxBuySellLimit; mapping(address => bool) public isExcludedFromMaxWalletLimit; mapping(address => bool) public dexPairStatus; mapping(address => address) public pairToRouter; mapping(address => address) public routerToPair; event TaxExclusionUpdated(address indexed account, bool indexed status); event MaxWalletLimitExclusionUpdated(address indexed account, bool indexed status); event MaxBuySellLimitExclusionUpdated(address indexed account, bool indexed status); event EarthFundWalletChanged(address indexed oldWallet, address indexed newWallet); event OperationsWalletChanged(address indexed oldWallet, address indexed newWallet); event NewRouterAdded(address indexed routerAddress, address indexed pairAddress); modifier lockTheSwap() { _inSwapAndLiquify = true; _; _inSwapAndLiquify = false; } /** * @dev Constructor to initialize the Earth token contract. */ constructor() ERC20("PaleBlueDot", "Earth") Ownable(earthFundWallet) { isExcludedFromTax[earthFundWallet] = true; isExcludedFromMaxBuySellLimit[earthFundWallet] = true; isExcludedFromMaxWalletLimit[earthFundWallet] = true; isExcludedFromTax[operationsWallet] = true; isExcludedFromMaxBuySellLimit[operationsWallet] = true; isExcludedFromMaxWalletLimit[operationsWallet] = true; isExcludedFromMaxWalletLimit[address(this)] = true; _mint(earthFundWallet, 1 * 10 ** decimals()); } /** * @dev Adds a new DEX router to the contract. * @param routerAddress The address of the new DEX router. * Requirements: * - Caller must be the owner of the contract. */ function addNewDexRouter(address routerAddress) external onlyOwner { IDexV2Router newRouter = IDexV2Router(routerAddress); address newPair; try IDexV2Factory(newRouter.factory()).createPair(address(this), newRouter.WETH()) {} catch {} newPair = IDexV2Factory(newRouter.factory()).getPair(address(this), newRouter.WETH()); dexPairStatus[newPair] = true; pairToRouter[newPair] = routerAddress; routerToPair[routerAddress] = newPair; isExcludedFromMaxWalletLimit[newPair] = true; emit NewRouterAdded(routerAddress, newPair); } /** * @dev Internal function to update balances and apply taxes on token transfers. * @param from Address from which tokens are transferred. * @param to Address to which tokens are transferred. * @param value Amount of tokens transferred. */ function _update(address from, address to, uint256 value) internal override { if ((dexPairStatus[from] || dexPairStatus[to]) && !(isExcludedFromTax[from] || isExcludedFromTax[to]) && !_inSwapAndLiquify) { uint256 taxValue = (value * (_earthFundTax + _operationsTax)) / 1000; value -= taxValue; if (dexPairStatus[to]) { // sell _transferETH(to); require((isExcludedFromMaxBuySellLimit[from] || value <= maxBuySellLimit), "ERC20: maxBuySellLimit exceeded"); } else { // buy require((isExcludedFromMaxBuySellLimit[to] || value <= maxBuySellLimit), "ERC20: maxBuySellLimit exceeded"); } super._update(from, address(this), taxValue); } require((isExcludedFromMaxWalletLimit[to] || (value + balanceOf(to)) <= maxWalletLimit), "ERC20: maxWalletLimit exceeded"); super._update(from, to, value); } /** * @dev Internal function to convert tokens to ETH and distribute taxes. * Transfers tokens to ETH if the token worth in ETH exceeds a threshold, distributes taxes to designated wallets, and updates balances accordingly. * This function is called when selling tokens on a DEX pair. */ function _transferETH(address to) private { uint256 contractBalance = balanceOf(address(this)); if (contractBalance >= 1000000000000000) { _swapTokensForEth(contractBalance, to); payable(earthFundWallet).transfer((address(this).balance * _earthFundTax) / 20); payable(operationsWallet).transfer(address(this).balance); } } /** * @dev Converts the accumulated tokens to ETH. */ function _swapTokensForEth(uint256 tokenAmount, address pair) private lockTheSwap { IDexV2Router dexRouter = IDexV2Router(pairToRouter[pair]); address[] memory path = new address[](2); path[0] = address(this); path[1] = dexRouter.WETH(); _approve(address(this), address(dexRouter), tokenAmount); dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, path, address(this), (block.timestamp + 300) ); } /** * @dev Sets the address of the new earth fund wallet. * @param newWallet The address of the new earth fund wallet. * Requirements: * `newWallet` cannot be the zero address. * Emits a {EarthFundWalletChanged} event. */ function changeEarthFundWallet(address newWallet) external onlyOwner { require(newWallet != address(0), "ERC20: new wallet is zero address"); address oldWallet = earthFundWallet; earthFundWallet = newWallet; emit EarthFundWalletChanged(oldWallet, newWallet); } /** * @dev Sets the address of the new operations wallet. * @param newWallet The address of the new operations wallet. * Requirements: * `newWallet` cannot be the zero address. * Emits a {OperationsWalletChanged} event. */ function changeOperationsWallet(address newWallet) external onlyOwner { require(newWallet != address(0), "ERC20: new wallet is zero address"); address oldWallet = operationsWallet; operationsWallet = newWallet; emit OperationsWalletChanged(oldWallet, newWallet); } /** * @dev Excludes or includes an account from taxation. * @param account The address of the account to be excluded or included. * @param status The status to set for tax exclusion (true for exclusion, false for inclusion). * Requirements: * - The caller must be the contract owner. */ function excludeFromTax(address account, bool status) external onlyOwner { isExcludedFromTax[account] = status; emit TaxExclusionUpdated(account, status); } /** * @dev Excludes or includes an account from the maximum buy/sell limit. * @param account The address of the account to be excluded or included. * @param status The status to set for maximum buy/sell limit exclusion (true for exclusion, false for inclusion). * Requirements: * - The caller must be the contract owner. */ function excludeFromMaxBuySellLimit(address account, bool status) external onlyOwner { isExcludedFromMaxBuySellLimit[account] = status; emit MaxBuySellLimitExclusionUpdated(account, status); } /** * @dev Excludes or includes an account from the maximum wallet limit. * @param account The address of the account to be excluded or included. * @param status The status to set for maximum wallet limit exclusion (true for exclusion, false for inclusion). * Requirements: * - The caller must be the contract owner. */ function excludeFromMaxWalletLimit(address account, bool status) external onlyOwner { isExcludedFromMaxWalletLimit[account] = status; emit MaxWalletLimitExclusionUpdated(account, status); } receive() external payable {} }