Contract Source Code:
File 1 of 1 : TokenERC20
pragma solidity ^0.4.16;
interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) external; }
contract DateTime {
function toTimestamp(uint16 year, uint8 month, uint8 day) public constant returns (uint timestamp);
function getYear(uint timestamp) public constant returns (uint16);
function getMonth(uint timestamp) public constant returns (uint8);
function getDay(uint timestamp) public constant returns (uint8);
}
contract TokenERC20 {
// Public variables of the token
string public name = "Authpaper Coin";
string public symbol = "AUPC";
uint8 public decimals = 18;
// 18 decimals is the strongly suggested default, avoid changing it
uint256 public totalSupply = 400000000 * 10 ** uint256(decimals);
address public owner;
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
mapping (address => uint256) public icoAmount;
// This generates a public event on the blockchain that will notify clients
event Transfer(address indexed from, address indexed to, uint256 value);
// This generates a public event on the blockchain that will notify clients
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
//Date related code
address public dateTimeAddr = 0x1a6184CD4C5Bea62B0116de7962EE7315B7bcBce;
DateTime dateTime = DateTime(dateTimeAddr);
uint[] lockupTime = [dateTime.toTimestamp(2018,9,15),dateTime.toTimestamp(2018,10,15),dateTime.toTimestamp(2018,11,15),
dateTime.toTimestamp(2018,12,15),dateTime.toTimestamp(2019,1,15),dateTime.toTimestamp(2019,2,15),
dateTime.toTimestamp(2019,3,15),dateTime.toTimestamp(2019,4,15),dateTime.toTimestamp(2019,5,15),
dateTime.toTimestamp(2019,6,15),dateTime.toTimestamp(2019,7,15),dateTime.toTimestamp(2019,8,15),
dateTime.toTimestamp(2019,9,15)];
uint lockupRatio = 8;
uint fullTradeTime = dateTime.toTimestamp(2019,10,1);
/**
* Constructor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
constructor() public {
balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
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);
// Check if the sender has enough
require(balanceOf[_from] >= _value);
// Check for overflows
require( balanceOf[_to] + _value >= balanceOf[_to] );
require( 100*(balanceOf[_from] - _value) >= (balanceOf[_from] - _value) );
require( 100*icoAmount[_from] >= icoAmount[_from] );
require( icoAmount[_to] + _value >= icoAmount[_to] );
if(now < fullTradeTime && _from != owner && _to !=owner && icoAmount[_from] >0) {
//Check for lockup period and lockup percentage
uint256 i=0;
for (uint256 l = lockupTime.length; i < l; i++) {
if(now < lockupTime[i]) break;
}
uint256 minAmountLeft = (i<1)? 0 : ( (lockupRatio*i>100)? 100 : lockupRatio*i );
minAmountLeft = 100 - minAmountLeft;
require( ((balanceOf[_from] - _value)*100) >= (minAmountLeft*icoAmount[_from]) );
}
// 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;
if(_from == owner && now < fullTradeTime) icoAmount[_to] += _value;
if(_to == owner){
if(icoAmount[_from] >= _value) icoAmount[_from] -= _value;
else icoAmount[_from]=0;
}
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) public returns (bool success) {
_transfer(msg.sender, _to, _value);
return true;
}
/**
* 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) public returns (bool success) {
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
function addApprove(address _spender, uint256 _value) public returns (bool success){
require( allowance[msg.sender][_spender] + _value >= allowance[msg.sender][_spender] );
allowance[msg.sender][_spender] += _value;
emit Approval(msg.sender, _spender, allowance[msg.sender][_spender]);
return true;
}
function claimICOToken() public returns (bool success){
require(allowance[owner][msg.sender] > 0); // Check allowance
transferFrom(owner,msg.sender,allowance[owner][msg.sender]);
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) {
allowance[msg.sender][_spender] = _value;
emit Approval(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)
public
returns (bool success) {
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) public 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
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) public returns (bool success) {
require(balanceOf[_from] >= _value); // Check if the targeted balance is enough
require(_value <= allowance[_from][msg.sender]); // Check allowance
balanceOf[_from] -= _value; // Subtract from the targeted balance
allowance[_from][msg.sender] -= _value; // Subtract from the sender's allowance
totalSupply -= _value; // Update totalSupply
emit Burn(_from, _value);
return true;
}
}