Contract Name:
ManagedToken
Contract Source Code:
File 1 of 1 : ManagedToken
pragma solidity ^0.4.16;
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a / b;
return c;
}
function sub(uint256 a, uint256 b) internal constant returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
interface TokenUpgraderInterface{
function hasUpgraded(address _for) public view returns (bool alreadyUpgraded);
function upgradeFor(address _for, uint256 _value) public returns (bool success);
}
contract ManagedToken {
using SafeMath for uint256;
address public owner = msg.sender;
address public crowdsaleContractAddress;
address public crowdsaleManager;
string public name;
string public symbol;
bool public upgradable = false;
bool public upgraderSet = false;
TokenUpgraderInterface public upgrader;
bool public locked = true;
uint8 public decimals = 18;
uint256 public totalSupplyLimit = 1000000000*(10**18); // limit supply to 1 bln tokens
uint256 private newTotalSupply;
modifier unlocked() {
require(!locked);
_;
}
modifier unlockedOrByManager() {
require(!locked || (crowdsaleManager != address(0) && msg.sender == crowdsaleManager) || (msg.sender == owner));
_;
}
// Ownership
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
modifier onlyCrowdsale() {
require(msg.sender == crowdsaleContractAddress);
_;
}
modifier ownerOrCrowdsale() {
require(msg.sender == owner || msg.sender == crowdsaleContractAddress);
_;
}
function transferOwnership(address newOwner) public onlyOwner returns (bool success) {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
return true;
}
// ERC20 related functions
uint256 public totalSupply = 0;
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
function transfer(address _to, uint256 _value) unlockedOrByManager public returns (bool) {
require(_to != address(0));
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) view public returns (uint256 balance) {
return balances[_owner];
}
function transferFrom(address _from, address _to, uint256 _value) unlocked public returns (bool) {
require(_to != address(0));
var _allowance = allowed[_from][msg.sender];
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
return true;
}
function approve(address _spender, uint256 _value) unlocked public returns (bool) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0));
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) view public returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function increaseApproval (address _spender, uint _addedValue) unlocked public
returns (bool success) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval (address _spender, uint _subtractedValue) unlocked public
returns (bool success) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function ManagedToken (string _name, string _symbol, uint8 _decimals) public {
require(bytes(_name).length > 1);
require(bytes(_symbol).length > 1);
name = _name;
symbol = _symbol;
decimals = _decimals;
}
function setNameAndTicker(string _name, string _symbol) onlyOwner public returns (bool success) {
require(bytes(_name).length > 1);
require(bytes(_symbol).length > 1);
name = _name;
symbol = _symbol;
return true;
}
function setLock(bool _newLockState) ownerOrCrowdsale public returns (bool success) {
require(_newLockState != locked);
locked = _newLockState;
return true;
}
function setCrowdsale(address _newCrowdsale) onlyOwner public returns (bool success) {
crowdsaleContractAddress = _newCrowdsale;
return true;
}
function setManager(address _newManager) onlyOwner public returns (bool success) {
crowdsaleManager = _newManager;
return true;
}
function mint(address _for, uint256 _amount) onlyCrowdsale public returns (bool success) {
newTotalSupply = totalSupply.add(_amount);
if (newTotalSupply > totalSupplyLimit) {
revert();
}
balances[_for] = balances[_for].add(_amount);
totalSupply = newTotalSupply;
Transfer(0, _for, _amount);
return true;
}
function demint(address _for, uint256 _amount) onlyCrowdsale public returns (bool success) {
balances[_for] = balances[_for].sub(_amount);
totalSupply = totalSupply.sub(_amount);
Transfer(_for, 0, _amount);
return true;
}
function allowUpgrading(bool _newState) onlyOwner public returns (bool success) {
upgradable = _newState;
return true;
}
function setUpgrader(address _upgraderAddress) onlyOwner public returns (bool success) {
require(!upgraderSet);
require(_upgraderAddress != address(0));
upgraderSet = true;
upgrader = TokenUpgraderInterface(_upgraderAddress);
return true;
}
function upgrade() public returns (bool success) {
require(upgradable);
require(upgraderSet);
require(upgrader != TokenUpgraderInterface(0));
require(!upgrader.hasUpgraded(msg.sender));
uint256 value = balances[msg.sender];
assert(value > 0);
delete balances[msg.sender];
totalSupply = totalSupply.sub(value);
assert(upgrader.upgradeFor(msg.sender, value));
return true;
}
function upgradeFor(address _for, uint256 _value) public returns (bool success) {
require(upgradable);
require(upgraderSet);
require(upgrader != TokenUpgraderInterface(0));
var _allowance = allowed[_for][msg.sender];
assert(_allowance > 0);
balances[_for] = balances[_for].sub(_value);
allowed[_for][msg.sender] = _allowance.sub(_value);
totalSupply = totalSupply.sub(_value);
assert(upgrader.upgradeFor(_for, _value));
return true;
}
function () external {
if (upgradable) {
assert(upgrade());
return;
}
revert();
}
}