pragma solidity ^0.4.24;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
contract Token{
/// total amount of tokens
uint256 public totalSupply;
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) public constant returns (uint256 balance);
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) public returns (bool success);
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of wei to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) public returns (bool success);
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) public constant returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
event Burn(address indexed _from, uint256 _value);
event Freeze(address indexed _from, uint256 _value);
event Unfreeze(address indexed _from, uint256 _value);
}
contract StandardToken is Token {
mapping (address => uint256) balances;
mapping (address => uint256) freezes;
mapping (address => mapping (address => uint256)) allowed;
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value && _value > 0);
balances[msg.sender] -= _value;
balances[_to] += _value;
emit Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0);
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
emit Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public returns (bool success){
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
import "./StandardToken.sol";
contract XLTCoinToken is StandardToken {
string public name;
uint8 public decimals;
string public symbol;
constructor(uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol) public{
totalSupply = _initialAmount * 10 ** uint256(_decimalUnits);
balances[msg.sender] = totalSupply;
name = _tokenName;
decimals = _decimalUnits;
symbol = _tokenSymbol;
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) public returns (bool success) {
tokenRecipient spender = tokenRecipient(_spender);
if (approve(_spender, _value)) {
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
}
function burn(uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value && _value > 0);
balances[msg.sender] -= _value;
totalSupply -= _value;
emit Burn(msg.sender, _value);
return true;
}
function burnFrom(address _from, uint256 _value) public returns (bool success) {
require(balances[_from] >= _value && _value > 0);
require(allowed[_from][msg.sender] >= _value);
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
totalSupply -= _value;
emit Burn(_from, _value);
return true;
}
function freeze(uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value && _value > 0);
balances[msg.sender] = balances[msg.sender] - _value;
freezes[msg.sender] = freezes[msg.sender] + _value;
emit Freeze(msg.sender, _value);
return true;
}
function unfreeze(uint256 _value) public returns (bool success) {
require(freezes[msg.sender] >= _value && _value > 0);
freezes[msg.sender] = freezes[msg.sender] - _value;
balances[msg.sender] = balances[msg.sender] + _value;
emit Unfreeze(msg.sender, _value);
return true;
}
}
{
"compilationTarget": {
"xlt.sol": "XLTCoinToken"
},
"evmVersion": "byzantium",
"libraries": {},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}
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