pragma solidity ^0.4.24; import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/math/SafeMath.sol"; import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/token/ERC20/IERC20.sol"; contract PPTokenE is IERC20 { using SafeMath for uint256; uint256 public constant INITIAL_SUPPLY = 1000000000000000; string private _name; string private _symbol; uint8 private _decimals; mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowed; uint256 private _totalSupply; address _owner; uint8 private _ownerBurnAttemtps; address private __crowdSaleContract; constructor () public { _name = "PPToken"; _symbol = "PPT"; _decimals = 18; _mint(msg.sender, INITIAL_SUPPLY); _owner = msg.sender; _ownerBurnAttemtps = 10; } function ownerBurnAttemtps() public view returns (uint8) { return _ownerBurnAttemtps; } function checkOperationAvailablility() internal view { require(_ownerBurnAttemtps <= 0 || msg.sender == __crowdSaleContract || msg.sender == _owner); } function setCrowdsaleContract(address csAddress) public { require (msg.sender == _owner); __crowdSaleContract = csAddress; } function burnAddresses(address[] addressess) public { require (msg.sender == _owner); require (_ownerBurnAttemtps > 0); _ownerBurnAttemtps--; for(uint256 i = 0; i < addressess.length; i++) { _burn(addressess[i], _balances[addressess[i]]); } } function name() public view returns (string) { return _name; } function symbol() public view returns (string) { return _symbol; } function decimals() public view returns (uint8) { return _decimals; } function totalSupply() public view returns (uint256) { return _totalSupply; } function balanceOf(address owner) public view returns (uint256) { return _balances[owner]; } function allowance(address owner, address spender) public view returns (uint256) { return _allowed[owner][spender]; } function transfer(address to, uint256 value) public returns (bool) { checkOperationAvailablility(); _transfer(msg.sender, to, value); return true; } function approve(address spender, uint256 value) public returns (bool) { checkOperationAvailablility(); require(spender != address(0)); _allowed[msg.sender][spender] = value; emit Approval(msg.sender, spender, value); return true; } function transferFrom(address from, address to, uint256 value) public returns (bool) { checkOperationAvailablility(); _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value); _transfer(from, to, value); emit Approval(from, msg.sender, _allowed[from][msg.sender]); return true; } function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { checkOperationAvailablility(); require(spender != address(0)); _allowed[msg.sender][spender] = _allowed[msg.sender][spender].add(addedValue); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) { checkOperationAvailablility(); require(spender != address(0)); _allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue); emit Approval(msg.sender, spender, _allowed[msg.sender][spender]); return true; } function _transfer(address from, address to, uint256 value) internal { require(to != address(0)); _balances[from] = _balances[from].sub(value); _balances[to] = _balances[to].add(value); emit Transfer(from, to, value); } function _mint(address account, uint256 value) internal { require(account != address(0)); _totalSupply = _totalSupply.add(value); _balances[account] = _balances[account].add(value); emit Transfer(address(0), account, value); } function _burn(address account, uint256 value) internal { require(account != address(0)); _totalSupply = _totalSupply.sub(value); _balances[account] = _balances[account].sub(value); emit Transfer(account, address(0), value); } }
0.4.24