Contract Source Code:
File 1 of 1 : Earth
// 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 {}
}