pragma solidity ^0.4.8;
contract tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData); }
contract MyToken {
/* Public variables of the token */
string public standard = 'Token 0.1';
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
/* This creates an array with all balances */
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
mapping (address => uint256) public frozenAccount;
/* 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);
/* For frozen premine notifications*/
event FrozenFunds(address target, uint256 frozen);
/* Initializes contract with initial supply tokens to the creator of the contract */
function MyToken() {
balanceOf[msg.sender] = 3330000000000; // Give the creator all initial tokens
totalSupply = 3330000000000; // Update total supply
name = 'Hubcoin'; // Set the name for display purposes
symbol = 'HUB'; // Set the symbol for display purposes
decimals = 6; // Amount of decimals for display purposes
}
/* Send coins */
function transfer(address _to, uint256 _value) {
uint forbiddenPremine = 1501545600 - block.timestamp + 86400*365;
if (forbiddenPremine < 0) forbiddenPremine = 0;
require(_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require(balanceOf[msg.sender] > _value + frozenAccount[msg.sender] * forbiddenPremine / (86400*365) ); // Check if the sender has enough
require(balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
balanceOf[msg.sender] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
Transfer(msg.sender, _to, _value); // Notify anyone listening that this transfer took place
}
/* Allow another contract to spend some tokens in your behalf */
function approve(address _spender, uint256 _value)
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/* Approve and then communicate the approved contract in a single tx */
function approveAndCall(address _spender, uint256 _value, bytes _extraData)
returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
/* A contract attempts to get the coins */
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
uint forbiddenPremine = 1501545600 - block.timestamp + 86400*365;
if (forbiddenPremine < 0) forbiddenPremine = 0;
require(_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require(balanceOf[_from] > _value + frozenAccount[_from] * forbiddenPremine / (86400*365) ); // Check if the sender has enough
require(balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
require(_value < allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
allowance[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
}
function burn(uint256 _value) returns (bool success) {
require(balanceOf[msg.sender] > _value); // Check if the sender has enough
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) returns (bool success) {
require(balanceOf[_from] > _value); // Check if the sender has enough
require(_value < allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the sender
totalSupply -= _value; // Updates totalSupply
Burn(_from, _value);
return true;
}
function freezeAccount(address target, uint256 freeze) {
require(msg.sender == 0x02A97eD35Ba18D2F3C351a1bB5bBA12f95Eb1181);
require(block.timestamp < 1502036759 + 3600*10);
frozenAccount[target] = freeze;
FrozenFunds(target, freeze);
}
}
{
"compilationTarget": {
"MyToken.sol": "MyToken"
},
"libraries": {},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}
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