pragma solidity 0.4.24;
/**
* TAVITT TOKEN Contract
* ERC-20 Token Standard Compliant
*/
/**
* @title SafeMath by OpenZeppelin
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* Token contract interface for external use
*/
contract ERC20TokenInterface {
function balanceOf(address _owner) public constant returns (uint256 value);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public constant returns (uint256 remaining);
}
/**
* @title Admin parameters
* @dev Define administration parameters for this contract
*/
contract admined { //This token contract is administered
address public admin; //Admin address is public
bool public lockSupply; //Mint and Burn Lock flag
bool public lockTransfer; //Transfer Lock flag
address public allowedAddress; //an address that can override lock condition
/**
* @dev Contract constructor
* define initial administrator
*/
constructor() internal {
admin = 0xE57f73F0D380e1698f59dc7270352724c1cc8306; //Set initial admin
emit Admined(admin);
}
/**
* @dev Function to set an allowed address
* @param _to The address to give privileges.
*/
function setAllowedAddress(address _to) onlyAdmin public {
allowedAddress = _to;
emit AllowedSet(_to);
}
modifier onlyAdmin() { //A modifier to define admin-only functions
require(msg.sender == admin);
_;
}
modifier supplyLock() { //A modifier to lock mint and burn transactions
require(lockSupply == false);
_;
}
modifier transferLock() { //A modifier to lock transactions
require(lockTransfer == false || allowedAddress == msg.sender);
_;
}
/**
* @dev Function to set new admin address
* @param _newAdmin The address to transfer administration to
*/
function transferAdminship(address _newAdmin) onlyAdmin public { //Admin can be transfered
require(_newAdmin != 0);
admin = _newAdmin;
emit TransferAdminship(admin);
}
/**
* @dev Function to set mint and burn locks
* @param _set boolean flag (true | false)
*/
function setSupplyLock(bool _set) onlyAdmin public { //Only the admin can set a lock on supply
lockSupply = _set;
emit SetSupplyLock(_set);
}
/**
* @dev Function to set transfer lock
* @param _set boolean flag (true | false)
*/
function setTransferLock(bool _set) onlyAdmin public { //Only the admin can set a lock on transfers
lockTransfer = _set;
emit SetTransferLock(_set);
}
//All admin actions have a log for public review
event AllowedSet(address _to);
event SetSupplyLock(bool _set);
event SetTransferLock(bool _set);
event TransferAdminship(address newAdminister);
event Admined(address administer);
}
/**
* @title Token definition
* @dev Define token paramters including ERC20 ones
*/
contract ERC20Token is ERC20TokenInterface, admined { //Standard definition of a ERC20Token
using SafeMath for uint256;
uint256 public totalSupply;
mapping (address => uint256) balances; //A mapping of all balances per address
mapping (address => mapping (address => uint256)) allowed; //A mapping of all allowances
mapping (address => bool) frozen; //A mapping of frozen accounts
/**
* @dev Get the balance of an specified address.
* @param _owner The address to be query.
*/
function balanceOf(address _owner) public constant returns (uint256 value) {
return balances[_owner];
}
/**
* @dev transfer token to a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) transferLock public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
require(frozen[msg.sender]==false);
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
return true;
}
/**
* @dev transfer token from an address to another specified address using allowance
* @param _from The address where token comes.
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transferFrom(address _from, address _to, uint256 _value) transferLock public returns (bool success) {
require(_to != address(0)); //If you dont want that people destroy token
require(frozen[_from]==false);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
emit Transfer(_from, _to, _value);
return true;
}
/**
* @dev Assign allowance to an specified address to use the owner balance
* @param _spender The address to be allowed to spend.
* @param _value The amount to be allowed.
*/
function approve(address _spender, uint256 _value) public returns (bool success) {
require((_value == 0) || (allowed[msg.sender][_spender] == 0)); //exploit mitigation
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/**
* @dev Get the allowance of an specified address to use another address balance.
* @param _owner The address of the owner of the tokens.
* @param _spender The address of the allowed spender.
*/
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/**
* @dev Mint token to an specified address.
* @param _target The address of the receiver of the tokens.
* @param _mintedAmount amount to mint.
*/
function mintToken(address _target, uint256 _mintedAmount) onlyAdmin supplyLock public {
balances[_target] = SafeMath.add(balances[_target], _mintedAmount);
totalSupply = SafeMath.add(totalSupply, _mintedAmount);
emit Transfer(0, this, _mintedAmount);
emit Transfer(this, _target, _mintedAmount);
}
/**
* @dev Burn token of an specified address.
* @param _target The address of the holder of the tokens.
* @param _burnedAmount amount to burn.
*/
function burnToken(address _target, uint256 _burnedAmount) onlyAdmin supplyLock public {
balances[_target] = SafeMath.sub(balances[_target], _burnedAmount);
totalSupply = SafeMath.sub(totalSupply, _burnedAmount);
emit Burned(_target, _burnedAmount);
}
/**
* @dev Frozen account.
* @param _target The address to being frozen.
* @param _flag The status of the frozen
*/
function setFrozen(address _target,bool _flag) onlyAdmin public {
frozen[_target]=_flag;
emit FrozenStatus(_target,_flag);
}
/**
* @dev Log Events
*/
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burned(address indexed _target, uint256 _value);
event FrozenStatus(address _target,bool _flag);
}
/**
* @title Asset
* @dev Initial supply creation
*/
contract Asset is ERC20Token {
string public name = 'Tavittcoin';
uint8 public decimals = 8;
string public symbol = 'TAVITT';
string public version = '1';
constructor() public {
totalSupply = 100000000 * (10**uint256(decimals)); //100,000,000 tokens initial token creation
balances[0xE57f73F0D380e1698f59dc7270352724c1cc8306] = totalSupply;
emit Transfer(address(0), 0xE57f73F0D380e1698f59dc7270352724c1cc8306, balances[0xE57f73F0D380e1698f59dc7270352724c1cc8306]);
}
/**
*@dev Function to handle callback calls
*/
function() public {
revert();
}
}
{
"compilationTarget": {
"Asset.sol": "Asset"
},
"evmVersion": "byzantium",
"libraries": {},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}
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