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December 19, 2018 15:05
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pragma solidity 0.4.18; | |
interface tokenRecipient {function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external;} | |
contract owned { | |
address public owner; | |
function owned() internal { | |
owner = msg.sender; | |
} | |
modifier onlyOwner { | |
require(msg.sender == owner); | |
_; | |
} | |
function transferOwnership(address newOwner) onlyOwner public { | |
owner = newOwner; | |
} | |
} | |
contract DOMI is owned { | |
// Public variables of the token | |
string public name = 'DOMI'; | |
string public symbol = 'DOMI'; | |
uint8 public decimals = 18; | |
// 18 decimals is the strongly suggested default, avoid changing it | |
uint256 public totalSupply = 50000000; | |
// This creates an array with all balances | |
mapping(address => uint256) public balanceOf; | |
mapping(address => uint256) public freezeOf; | |
mapping(address => mapping(address => uint256)) public allowance; | |
mapping(address => uint256) public ethBalanceOf; | |
// This generates a public event on the blockchain that will notify clients | |
event Transfer(address indexed from, address indexed to, uint256 value); | |
// This notifies clients about the amount burnt | |
event Burn(address indexed from, uint256 value); | |
/* This notifies clients about the amount frozen */ | |
event Freeze(address indexed from, uint256 value); | |
/* This notifies clients about the amount unfrozen */ | |
event Unfreeze(address indexed from, uint256 value); | |
/** | |
* Constructor function | |
* | |
* Initializes contract with initial supply tokens to the creator of the contract | |
*/ | |
function DOMI( | |
uint256 initialSupply, | |
string tokenName, | |
string tokenSymbol | |
) public { | |
// Update total supply with the decimal amount | |
totalSupply = initialSupply * 10 ** uint256(decimals); | |
// Give the creator all initial tokens | |
balanceOf[msg.sender] = totalSupply; | |
// Set the name for display purposes | |
name = tokenName; | |
// Set the symbol for display purposes | |
symbol = tokenSymbol; | |
// Set the ownership of the contract | |
owner = msg.sender; | |
} | |
/** | |
* Internal transfer, only can be called by this contract | |
*/ | |
function _transfer(address _from, address _to, uint _value) internal { | |
// Prevent transfer to 0x0 address. Use burn() instead | |
require(_to != 0x0); | |
// Prevent transfer to same contract | |
require(_to != address(this)); | |
// Check that the value is positive | |
require(_value >= 0); | |
// Check if the sender has enough | |
require(balanceOf[_from] >= _value); | |
// Check for overflows | |
require(balanceOf[_to] + _value >= balanceOf[_to]); | |
// Save this for an assertion in the future | |
uint previousBalances = balanceOf[_from] + balanceOf[_to]; | |
// Subtract from the sender | |
balanceOf[_from] -= _value; | |
// Add the same to the recipient | |
balanceOf[_to] += _value; | |
emit Transfer(_from, _to, _value); | |
// Asserts are used to use static analysis to find bugs in your code. They should never fail | |
assert(balanceOf[_from] + balanceOf[_to] == previousBalances); | |
} | |
/** | |
* Transfer tokens | |
* | |
* Send `_value` tokens to `_to` from your account | |
* | |
* @param _to The address of the recipient | |
* @param _value the amount to send | |
*/ | |
function transfer(address _to, uint256 _value) external { | |
// Check that the value is positive | |
require(_value >= 0); | |
_transfer(msg.sender, _to, _value); | |
} | |
/** | |
* Transfer tokens from other address | |
* | |
* Send `_value` tokens to `_to` on behalf of `_from` | |
* | |
* @param _from The address of the sender | |
* @param _to The address of the recipient | |
* @param _value the amount to send | |
*/ | |
function transferFrom(address _from, address _to, uint256 _value) external returns (bool success) { | |
// Check that the value is positive | |
require(_value >= 0); | |
require(_value <= allowance[_from][msg.sender]); | |
// Check allowance | |
allowance[_from][msg.sender] -= _value; | |
_transfer(_from, _to, _value); | |
return true; | |
} | |
/** | |
* Set allowance for other address | |
* | |
* Allows `_spender` to spend no more than `_value` tokens on your behalf | |
* | |
* @param _spender The address authorized to spend | |
* @param _value the max amount they can spend | |
*/ | |
function approve(address _spender, uint256 _value) public returns (bool success) { | |
// Check that the value is positive | |
require(_value >= 0); | |
allowance[msg.sender][_spender] = _value; | |
return true; | |
} | |
/** | |
* Set allowance for other address and notify | |
* | |
* Allows `_spender` to spend no more than `_value` tokens on your behalf, and then ping the contract about it | |
* | |
* @param _spender The address authorized to spend | |
* @param _value the max amount they can spend | |
* @param _extraData some extra information to send to the approved contract | |
*/ | |
function approveAndCall(address _spender, uint256 _value, bytes _extraData) | |
external returns (bool success) { | |
// Check that the value is positive | |
require(_value >= 0); | |
tokenRecipient spender = tokenRecipient(_spender); | |
if (approve(_spender, _value)) { | |
spender.receiveApproval(msg.sender, _value, this, _extraData); | |
return true; | |
} | |
} | |
/** | |
* Destroy tokens | |
* | |
* Remove `_value` tokens from the system irreversibly | |
* | |
* @param _value the amount of money to burn | |
*/ | |
function burn(uint256 _value) external returns (bool success) { | |
// Check if the sender has enough | |
require(balanceOf[msg.sender] >= _value); | |
// Check that the value is positive | |
require(_value > 0); | |
// Subtract from the sender | |
balanceOf[msg.sender] -= _value; | |
// Updates totalSupply | |
totalSupply -= _value; | |
emit Burn(msg.sender, _value); | |
return true; | |
} | |
/** | |
* Destroy tokens from other account | |
* | |
* Remove `_value` tokens from the system irreversibly on behalf of `_from`. | |
* | |
* @param _from the address of the sender | |
* @param _value the amount of money to burn | |
*/ | |
function burnFrom(address _from, uint256 _value) external returns (bool success) { | |
// Check if the targeted balance is enough | |
require(balanceOf[_from] >= _value); | |
// Check that the value is positive | |
require(_value > 0); | |
// Check allowance | |
require(_value <= allowance[_from][msg.sender]); | |
// Subtract from the targeted balance | |
balanceOf[_from] -= _value; | |
// Subtract from the sender's allowance | |
allowance[_from][msg.sender] -= _value; | |
// Update totalSupply | |
totalSupply -= _value; | |
emit Burn(_from, _value); | |
return true; | |
} | |
function freeze(uint256 _value) external returns (bool success) { | |
require(balanceOf[msg.sender] >= _value); | |
// Check if the sender has enough | |
require(_value > 0); | |
balanceOf[msg.sender] -= _value; | |
// Subtract from the sender | |
freezeOf[msg.sender] += _value; | |
// Updates totalSupply | |
emit Freeze(msg.sender, _value); | |
return true; | |
} | |
function unfreeze(uint256 _value) external returns (bool success) { | |
require(freezeOf[msg.sender] >= _value); | |
// Check if the sender has enough | |
require(_value > 0); | |
freezeOf[msg.sender] -= _value; | |
// Subtract from the sender | |
balanceOf[msg.sender] += _value; | |
emit Unfreeze(msg.sender, _value); | |
return true; | |
} | |
// transfer balance to owner | |
function withdrawEther(uint256 amount) onlyOwner external { | |
require(msg.sender == owner); | |
owner.transfer(amount); | |
} | |
function kill() onlyOwner external { | |
require(msg.sender == owner); | |
selfdestruct(owner); | |
} | |
// can accept ether | |
event Paid(uint); | |
function() payable external { | |
require(msg.value > 0); | |
ethBalanceOf[msg.sender] += msg.value; | |
// revert(); // If enabled then don't accepts ETH | |
emit Paid(msg.value); | |
} | |
} |
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