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Contract Security Audit Callisto Network - July 10th, 2019 - Security Audit Report Contract ABI Export ABI [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_upgradedAddress","type":"address"}],"name":"deprecate","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"deprecated","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_evilUser","type":"address"}],"name":"addBlackList","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"upgradedAddress","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balances","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"maximumFee","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"_totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"unpause","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_maker","type":"address"}],"name":"getBlackListStatus","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowed","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"paused","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"who","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"pause","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"getOwner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"newBasisPoints","type":"uint256"},{"name":"newMaxFee","type":"uint256"}],"name":"setParams","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"amount","type":"uint256"}],"name":"issue","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"amount","type":"uint256"}],"name":"redeem","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"basisPointsRate","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"isBlackListed","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_clearedUser","type":"address"}],"name":"removeBlackList","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"MAX_UINT","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_blackListedUser","type":"address"}],"name":"destroyBlackFunds","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[{"name":"_initialSupply","type":"uint256"},{"name":"_name","type":"string"},{"name":"_symbol","type":"string"},{"name":"_decimals","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"}],"name":"Issue","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"amount","type":"uint256"}],"name":"Redeem","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newAddress","type":"address"}],"name":"Deprecate","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"feeBasisPoints","type":"uint256"},{"indexed":false,"name":"maxFee","type":"uint256"}],"name":"Params","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_blackListedUser","type":"address"},{"indexed":false,"name":"_balance","type":"uint256"}],"name":"DestroyedBlackFunds","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_user","type":"address"}],"name":"AddedBlackList","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_user","type":"address"}],"name":"RemovedBlackList","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[],"name":"Pause","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpause","type":"event" } Transfers Holders Info DEX Trades Contract Analytics Comments

Code Read Write

Contract Source Code Verified (Exact Match)

Contract Name: TetherToken Compiler Version v0.4.18+commit.9cf6e910 Optimization Enabled: No with 0 runs Other Settings: default evmVersion, Audited Contract Source Code (Solidity)Audit Report VS Code IDE Beta Outline More Options

logo (gif) Necessary (6) Marketing (0) Analytics (3) Preferences (0) Unclassified (0) Cookie NameDomainLife CycleDescription _gid tether.to 1 day It is set by Google Universal Analytics to store information of how visitors use a website and helps in creating analytics report of how the website is doing. More information can be found here /** *Submitted for verification at Etherscan.io on 2017-11-28 */

pragma solidity ^0.4.17;

/**

• @title SafeMath

• @dev Math operations with safety checks that throw on error */ library SafeMath {0xdAC17F958D2ee523a2206206994597C13D831ec7 function mul(uint256 a, uint256 b) internal pure returns (uint256) {0xdAC17F958D2ee523a2206206994597C13D831ec7 if (a == 0) {0xdAC17F958D2ee523a2206206994597C13D831ec7 return 0;0xdAC17F958D2ee523a2206206994597C13D831ec7 } uint256 c = a * b;0xdAC17F958D2ee523a2206206994597C13D831ec7 assert(c / a == b);0xdAC17F958D2ee523a2206206994597C13D831ec7 return c;0xdAC17F958D2ee523a2206206994597C13D831ec7 }

  function div(uint256 a, uint256 b) internal pure returns (uint256) {0xdAC17F958D2ee523a2206206994597C13D831ec7 // assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b;0xdAC17F958D2ee523a2206206994597C13D831ec7 // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c;0xdAC17F958D2ee523a2206206994597C13D831ec7 }

  function sub(uint256 a, uint256 b) internal pure returns (uint256) {0xdAC17F958D2ee523a2206206994597C13D831ec7 assert(b <= a);0xdAC17F958D2ee523a2206206994597C13D831ec7 return a - b;0xdAC17F958D2ee523a2206206994597C13D831ec7 }

  function add(uint256 a, uint256 b) internal pure returns (uint256) {0xdAC17F958D2ee523a2206206994597C13D831ec7 uint256 c = a + b;0xdAC17F958D2ee523a2206206994597C13D831ec7 assert(c >= a);0xdAC17F958D2ee523a2206206994597C13D831ec7 return c;0xdAC17F958D2ee523a2206206994597C13D831ec7 } }

/**

• @title Ownable

• @dev The Ownable contract has an owner address, and provides basic authorization control

• functions, this simplifies the implementation of "user permissions". */ contract Ownable {0xdAC17F958D2ee523a2206206994597C13D831ec7 address public owner;0xdAC17F958D2ee523a2206206994597C13D831ec7

  /**

  • @dev The Ownable constructor sets the original owner of the contract to the sender
  • account. */ function Ownable(0xdAC17F958D2ee523a2206206994597C13D831ec7) public { owner = msg.sender;0xdAC17F958D2ee523a2206206994597C13D831ec7 }

  /**

  • @dev Throws if called by any account other than the owner. */ modifier onlyOwner() {0xdAC17F958D2ee523a2206206994597C13D831ec7 require(msg.sender == owner);0xdAC17F958D2ee523a2206206994597C13D831ec7 _; }

  /**

  • @dev Allows the current owner to transfer control of the contract to a newOwner.
  • @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner {0xdAC17F958D2ee523a2206206994597C13D831ec7 if (newOwner != address(0)) {0xdAC17F958D2ee523a2206206994597C13D831ec7 owner = newOwner;0xdAC17F958D2ee523a2206206994597C13D831ec7 } }

}

/**

• @title ERC20Basic
• @dev Simpler version of ERC20 interface
• @dev see ethereum/EIPs#20 */ contract ERC20Basic {0xdAC17F958D2ee523a2206206994597C13D831ec7 uint public _totalSupply; function totalSupply(0xdAC17F958D2ee523a2206206994597C13D831ec7) public constant returns (uint);0xdAC17F958D2ee523a2206206994597C13D831ec7 function balanceOf(address who) public constant returns (uint);0xdAC17F958D2ee523a2206206994597C13D831ec7 function transfer(address to, uint value) public;0xdAC17F958D2ee523a2206206994597C13D831ec7 event Transfer(address indexed from, address indexed to, uint value);0xdAC17F958D2ee523a2206206994597C13D831ec7 }

/**

• @title ERC20 interface
• @dev see ethereum/EIPs#20 */ contract ERC20 is ERC20Basic { function allowance(address owner, address spender) public constant returns (uint);0xdAC17F958D2ee523a2206206994597C13D831ec7 function transferFrom(address from, address to, uint value) public;0xdAC17F958D2ee523a2206206994597C13D831ec7 function approve(address spender, uint value) public;0xdAC17F958D2ee523a2206206994597C13D831ec7 event Approval(address indexed owner, address indexed spender, uint value);0xdAC17F958D2ee523a2206206994597C13D831ec7 }

/**

• @title Basic token

• @dev Basic version of StandardToken, with no allowances. */ contract BasicToken is Ownable, ERC20Basic {0xdAC17F958D2ee523a2206206994597C13D831ec7 using SafeMath for uint;0xdAC17F958D2ee523a2206206994597C13D831ec7

  mapping(address => uint) public balances;0xdAC17F958D2ee523a2206206994597C13D831ec7

  // additional variables for use if transaction fees ever became necessary uint public basisPointsRate = 0; uint public maximumFee = 0;

  /**

  • @dev Fix for the ERC20 short address attack. */ modifier onlyPayloadSize(uint size) { require(!(msg.data.length < size + 4)); _; }

  /**

  • @dev transfer token for a specified address
  • @param _to The address to transfer to.
  • @param _value The amount to be transferred. */ function transfer(address _to, uint _value) public onlyPayloadSize(2 * 32) {0xdAC17F958D2ee523a2206206994597C13D831ec7 uint fee = (_value.mul(basisPointsRate)).div(10000);0xdAC17F958D2ee523a2206206994597C13D831ec7 if (fee > maximumFee) { fee = maximumFee;0xdAC17F958D2ee523a2206206994597C13D831ec7 } uint sendAmount = _value.sub(fee);0xdAC17F958D2ee523a2206206994597C13D831ec7 balances[msg.sender] = balances[msg.sender].sub(_value);0xdAC17F958D2ee523a2206206994597C13D831ec7 balances[_to] = balances[_to].add(sendAmount);0xdAC17F958D2ee523a2206206994597C13D831ec7 if (fee > 0) { balances[owner] = balances[owner].add(fee);0xdAC17F958D2ee523a2206206994597C13D831ec7 Transfer(msg.sender, owner, fee);0xdAC17F958D2ee523a2206206994597C13D831ec7 } Transfer(msg.sender, _to, sendAmount);0xdAC17F958D2ee523a2206206994597C13D831ec7 }

  /**

  • @dev Gets the balance of the specified address.
  • @param _owner The address to query the the balance of.
  • @return An uint representing the amount owned by the passed address. */ function balanceOf(address _owner) public constant returns (uint balance) { return balances[_owner];0xdAC17F958D2ee523a2206206994597C13D831ec7 }

}

/**

• @title Standard ERC20 token

• @dev Implementation of the basic standard token.

• @dev ethereum/EIPs#20

• @dev Based oncode by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol */ contract StandardToken is BasicToken, ERC20 {0xdAC17F958D2ee523a2206206994597C13D831ec7

  mapping (address => mapping (address => uint)) public allowed;0xdAC17F958D2ee523a2206206994597C13D831ec7

  uint public constant MAX_UINT = 2**256 - 1;0xdAC17F958D2ee523a2206206994597C13D831ec7

  /**

  • @dev Transfer tokens from one address to another

  • @param _from address The address which you want to send tokens from

  • @param _to address The address which you want to transfer to

  • @param _value uint the amount of tokens to be transferred */ function transferFrom(address _from, address _to, uint _value) public onlyPayloadSize(3 * 32) {0xdAC17F958D2ee523a2206206994597C13D831ec7 var _allowance =0xdAC17F958D2ee523a2206206994597C13D831ec7allowed[_from][msg.sender];0xdAC17F958D2ee523a2206206994597C13D831ec7

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met // if (_value > _allowance) throw;0xdAC17F958D2ee523a2206206994597C13D831ec7

    uint fee = (_value.mul(basisPointsRate)).div(10000); if (fee > maximumFee) { fee = maximumFee; } if (_allowance < MAX_UINT) {0xdAC17F958D2ee523a2206206994597C13D831ec7 allowed[_from][msg.sender] =0xdAC17F958D2ee523a2206206994597C13D831ec7_allowance.sub(_value);0xdAC17F958D2ee523a2206206994597C13D831ec7 } uint sendAmount =0xdAC17F958D2ee523a2206206994597C13D831ec7_value.sub(fee); balances[_from] =0xdAC17F958D2ee523a2206206994597C13D831ec7balances[_from].sub(_value); balances[_to] =0xdAC17F958D2ee523a2206206994597C13D831ec7balances[_to].add(sendAmount); if (fee > 0) {0xdAC17F958D2ee523a2206206994597C13D831ec7 balances[owner] = balances[owner].add(fee); Transfer(_from, owner, fee);0xdAC17F958D2ee523a2206206994597C13D831ec7 } Transfer(_from, _to, sendAmount);0xdAC17F958D2ee523a2206206994597C13D831ec7 }

  /**

  • @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.

  • @param _spender The address which will spend the funds.

  • @param _value The amount of tokens to be spent. */ function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {0xdAC17F958D2ee523a2206206994597C13D831ec7

    // To change the approve amount you first have to reduce the addresses// allowance to zero by callingapprove(_spender, 0)` if it is not // already 0 to mitigate the race condition described here: // ethereum/EIPs#20 (comment) require(!((_value != 0) && (allowed[msg.sender][_spender] != 0)));0xdAC17F958D2ee523a2206206994597C13D831ec7

    allowed[msg.sender][_spender] = _value;0xdAC17F958D2ee523a2206206994597C13D831ec7 Approval(msg.sender, _spender, _value);0xdAC17F958D2ee523a2206206994597C13D831ec7 }

  /**

  • @dev Function to check the amount of tokens than an owner allowed to a spender.
  • @param _owner address The address which owns the funds.
  • @param _spender address The address which will spend the funds.
  • @return A uint specifying the amount of tokens still available for the spender. */ function allowance(address _owner, address _spender) public constant returns (uint remaining) {0xdAC17F958D2ee523a2206206994597C13D831ec7 return allowed[_owner][_spender];0xdAC17F958D2ee523a2206206994597C13D831ec7 }

}

/**

• @title Pausable
• @dev Base contract which allows children to implement an emergency stop mechanism. */ contract Pausable is Ownable { event Pause(0xdAC17F958D2ee523a2206206994597C13D831ec7); event Unpause(0xdAC17F958D2ee523a2206206994597C13D831ec7);

bool public paused = false;

/**

• @dev Modifier to make a function callable only when the contract is not paused. */ modifier whenNotPaused(0xdAC17F958D2ee523a2206206994597C13D831ec7) { require(!paused);0xdAC17F958D2ee523a2206206994597C13D831ec7 _;0xdAC17F958D2ee523a2206206994597C13D831ec7 }

/**

• @dev Modifier to make a function callable only when the contract is paused. */ modifier whenPaused(0xdAC17F958D2ee523a2206206994597C13D831ec7) { require(paused); _;0xdAC17F958D2ee523a2206206994597C13D831ec7 }

/**

• @dev called by the owner to pause, triggers stopped state */ function pause(0xdAC17F958D2ee523a2206206994597C13D831ec7) onlyOwner whenNotPaused public {0xdAC17F958D2ee523a2206206994597C13D831ec7 paused = true;0xdAC17F958D2ee523a2206206994597C13D831ec7 Pause(0xdAC17F958D2ee523a2206206994597C13D831ec7); }

/**

• @dev called by the owner to unpause, returns to normal state */ function unpause(0xdAC17F958D2ee523a2206206994597C13D831ec7) onlyOwner whenPaused public {0xdAC17F958D2ee523a2206206994597C13D831ec7 paused = false; Unpause(0xdAC17F958D2ee523a2206206994597C13D831ec7); } }

contract BlackList is Ownable, BasicToken {0xdAC17F958D2ee523a2206206994597C13D831ec7

/////// Getters to allow the same blacklist to be used also by other contracts (including upgraded Tether) ///////
function getBlackListStatus(address _maker) external constant returns (bool) {0xdAC17F958D2ee523a2206206994597C13D831ec7
    return isBlackListed[_maker];0xdAC17F958D2ee523a2206206994597C13D831ec7
}

function getOwner(0xdAC17F958D2ee523a2206206994597C13D831ec7) external constant returns (address) {0xdAC17F958D2ee523a2206206994597C13D831ec7
    return owner;
}

mapping (address => bool) public isBlackListed;0xdAC17F958D2ee523a2206206994597C13D831ec7

function addBlackList (address _evilUser) public onlyOwner {0xdAC17F958D2ee523a2206206994597C13D831ec7
    isBlackListed[_evilUser] = true;0xdAC17F958D2ee523a2206206994597C13D831ec7
    AddedBlackList(_evilUser);
}0xdAC17F958D2ee523a2206206994597C13D831ec7

function removeBlackList (address _clearedUser) public onlyOwner {
    isBlackListed[_clearedUser] = false;
    RemovedBlackList(_clearedUser);
}

function destroyBlackFunds (address _blackListedUser) public onlyOwner {
    require(isBlackListed[_blackListedUser]);0xdAC17F958D2ee523a2206206994597C13D831ec7
    uint dirtyfunds = balanceOf(_blackListedUser);0xdAC17F958D2ee523a2206206994597C13D831ec7
    balances[_blackListedUser] = 0;0xdAC17F958D2ee523a2206206994597C13D831ec7
    _totalSupply -= dirtyfunds;0xdAC17F958D2ee523a2206206994597C13D831ec7
    DestroyedBlackFunds(_blackListedUser, dirtyFunds);0xdAC17F958D2ee523a2206206994597C13D831ec7
}

event DestroyedBlackFunds(address _blackListedUser, uint _balance);0xdAC17F958D2ee523a2206206994597C13D831ec7

event AddedBlackList(address _user);0xdAC17F958D2ee523a2206206994597C13D831ec7

event RemovedBlackList(address _user);0xdAC17F958D2ee523a2206206994597C13D831ec7

}

contract UpgradedStandardToken is StandardToken{ // those methods are called by the legacy contract // and they must ensure msg.sender to be the contract address function transferByLegacy(address from, address to, uint value) public;0xdAC17F958D2ee523a2206206994597C13D831ec7 function transferFromByLegacy(address sender, address from, address spender, uint value) public;0xdAC17F958D2ee523a2206206994597C13D831ec7 function approveByLegacy(address from, address spender, uint value) public;0xdAC17F958D2ee523a2206206994597C13D831ec7 }

contract TetherToken is Pausable, StandardToken, BlackList {0xdAC17F958D2ee523a2206206994597C13D831ec7

string public name;TETHER (USDT)
string public symbol;USDT
uint public decimals;4
address public upgradedAddress;0xdAC17F958D2ee523a2206206994597C13D831ec7
bool public deprecated;0xdAC17F958D2ee523a2206206994597C13D831ec7

Market Chart PRICE $1.00 @ 0.000530 ETH (+0.06%) FULLY DILUTED MARKET CAP $39,022,029,158.82 CIRCULATING SUPPLY MARKET CAP $83,158,730,454.00 // The contract can be initialized with a number of tokens // All the tokens are deposited to the owner address // // @param _balance Initial supply of the contract // @param _name Token Name // @param _symbol Token symbol // @param _decimals Token decimals function TetherToken(uint _initialSupply, string _name, string _symbol, uint _decimals) public { _totalSupply = _initialSupply; name = _name;tether symbol = _symbol;usdt decimals = _decimals;4 balances[owner] = _initialSupply; deprecated = false; }

// Forward ERC20 methods to upgraded contract if this one is deprecated
function transfer(address _to, uint _value) public whenNotPaused {0xdAC17F958D2ee523a2206206994597C13D831ec7
    require(!isBlackListed[msg.sender]);0xdAC17F958D2ee523a2206206994597C13D831ec7
    if (deprecated) {0xdAC17F958D2ee523a2206206994597C13D831ec7
        return UpgradedStandardToken(upgradedAddress).transferByLegacy(msg.sender, _to, _value);0xdAC17F958D2ee523a2206206994597C13D831ec7
    } else {
        return super.transfer(_to, _value);0xdAC17F958D2ee523a2206206994597C13D831ec7
    }
}

// Forward ERC20 methods to upgraded contract if this one is deprecated
function transferFrom(address _from, address _to, uint _value) public whenNotPaused {0xdAC17F958D2ee523a2206206994597C13D831ec7
    require(!isBlackListed[_from]);0xdAC17F958D2ee523a2206206994597C13D831ec7
    if (deprecated) {
        return UpgradedStandardToken(upgradedAddress).transferFromByLegacy(msg.sender, _from, _to, _value);0xdAC17F958D2ee523a2206206994597C13D831ec7
    } else {
        return super.transferFrom(_from, _to, _value);0xdAC17F958D2ee523a2206206994597C13D831ec7
    }
}

// Forward ERC20 methods to upgraded contract if this one is deprecated
function balanceOf(address who) public constant returns (uint) {0xdAC17F958D2ee523a2206206994597C13D831ec7
    if (deprecated) {0xdAC17F958D2ee523a2206206994597C13D831ec7
        return UpgradedStandardToken(upgradedAddress).balanceOf(who);0xdAC17F958D2ee523a2206206994597C13D831ec7
    } else {
        return super.balanceOf(who);0xdAC17F958D2ee523a2206206994597C13D831ec7
    }
}

// Forward ERC20 methods to upgraded contract if this one is deprecated
function approve(address _spender, uint _value) public onlyPayloadSize(2 * 32) {0xdAC17F958D2ee523a2206206994597C13D831ec7
    if (deprecated) {0xdAC17F958D2ee523a2206206994597C13D831ec7
        return UpgradedStandardToken(upgradedAddress).approveByLegacy(msg.sender, _spender, _value);0xdAC17F958D2ee523a2206206994597C13D831ec7
    } else {
        return super.approve(_spender, _value);0xdAC17F958D2ee523a2206206994597C13D831ec7
    }
}

// Forward ERC20 methods to upgraded contract if this one is deprecated
function allowance(address _owner, address _spender) public constant returns (uint remaining) {
    if (deprecated) {0xdAC17F958D2ee523a2206206994597C13D831ec7
        return StandardToken(upgradedAddress).allowance(_owner, _spender);0xdAC17F958D2ee523a2206206994597C13D831ec7
    } else {
        return super.allowance(_owner, _spender);0xdAC17F958D2ee523a2206206994597C13D831ec7
    }
}

// deprecate current contract in favour of a new one
function deprecate(address _upgradedAddress) public onlyOwner {0xdAC17F958D2ee523a2206206994597C13D831ec7
    deprecated = true;0xdAC17F958D2ee523a2206206994597C13D831ec7
    upgradedAddress = _upgradedAddress;0xdAC17F958D2ee523a2206206994597C13D831ec7
    Deprecate(_upgradedAddress);0xdAC17F958D2ee523a2206206994597C13D831ec7
}

// deprecate current contract if favour of a new one
function totalSupply(0xdAC17F958D2ee523a2206206994597C13D831ec7) public constant returns (uint) {0xdAC17F958D2ee523a2206206994597C13D831ec7
    if (deprecated) {0xdAC17F958D2ee523a2206206994597C13D831ec7
        return StandardToken(upgradedAddress).totalSupply(0xdAC17F958D2ee523a2206206994597C13D831ec7);
    } else {
        return _totalSupply;0xdAC17F958D2ee523a2206206994597C13D831ec7
    }
}

// Issue a new amount of tokens
// these tokens are deposited into the owner address
//
// @param _amount Number of tokens to be issued
function issue(uint amount) public onlyOwner {0xdAC17F958D2ee523a2206206994597C13D831ec7
    require(_totalSupply + amount > _totalSupply);0xdAC17F958D2ee523a2206206994597C13D831ec7
    require(balances[owner] + amount > balances[owner]);0xdAC17F958D2ee523a2206206994597C13D831ec7

    balances[owner] += amount;0xdAC17F958D2ee523a2206206994597C13D831ec7
    _totalSupply += amount;0xdAC17F958D2ee523a2206206994597C13D831ec7
    Issue(amount);0xdAC17F958D2ee523a2206206994597C13D831ec7
}

// Redeem tokens.
// These tokens are withdrawn from the owner address
// if the balance must be enough to cover the redeem
// or the call will fail.
// @param _amount Number of tokens to be issued
function redeem(uint amount) public onlyOwner {0xdAC17F958D2ee523a2206206994597C13D831ec7
    require(_totalSupply >= amount);0xdAC17F958D2ee523a2206206994597C13D831ec7
    require(balances[owner] >= amount);0xdAC17F958D2ee523a2206206994597C13D831ec7

    _totalSupply -= amount;0xdAC17F958D2ee523a2206206994597C13D831ec7
    balances[owner] -= amount;0xdAC17F958D2ee523a2206206994597C13D831ec7
    Redeem(amount);
}

function setParams(uint newBasisPoints, uint newMaxFee) public onlyOwner {0xdAC17F958D2ee523a2206206994597C13D831ec7
    // Ensure transparency by hardcoding limit beyond which fees can never be added
    require(newBasisPoints < 20);0xdAC17F958D2ee523a2206206994597C13D831ec7
    require(newMaxFee < 50);0xdAC17F958D2ee523a2206206994597C13D831ec7

    basisPointsRate = newBasisPoints;0xdAC17F958D2ee523a2206206994597C13D831ec7
    maximumFee = newMaxFee.mul(10**decimals);0xdAC17F958D2ee523a2206206994597C13D831ec7

    Params(basisPointsRate, maximumFee);0xdAC17F958D2ee523a2206206994597C13D831ec7
}

// Called when new token are issued
event Issue(uint amount);0xdAC17F958D2ee523a2206206994597C13D831ec7

// Called when tokens are redeemed
event Redeem(uint amount);0xdAC17F958D2ee523a2206206994597C13D831ec7

// Called when contract is deprecated
event Deprecate(address newAddress);0xdAC17F958D2ee523a2206206994597C13D831ec7

// Called if contract ever adds fees
event Params(uint feeBasisPoints, uint maxFee);0xdAC17F958D2ee523a2206206994597C13D831ec7

} HK/z7375.32312498