Contract Source Code:
File 1 of 1 : Token
pragma solidity ^ 0.4.17;
contract SafeMath {
function safeMul(uint a, uint b) pure internal returns(uint) {
uint c = a * b;
assert(a == 0 || c / a == b);
return c;
}
function safeSub(uint a, uint b) pure internal returns(uint) {
assert(b <= a);
return a - b;
}
function safeAdd(uint a, uint b) pure internal returns(uint) {
uint c = a + b;
assert(c >= a && c >= b);
return c;
}
}
contract ERC20 {
uint public totalSupply;
function balanceOf(address who) public view returns(uint);
function allowance(address owner, address spender) public view returns(uint);
function transfer(address to, uint value) public returns(bool ok);
function transferFrom(address from, address to, uint value) public returns(bool ok);
function approve(address spender, uint value) public returns(bool ok);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract Ownable {
address public owner;
function Ownable() public {
owner = msg.sender;
}
function transferOwnership(address newOwner) public onlyOwner {
if (newOwner != address(0))
owner = newOwner;
}
function kill() public {
if (msg.sender == owner)
selfdestruct(owner);
}
modifier onlyOwner() {
if (msg.sender == owner)
_;
}
}
// The PPP token
contract Token is ERC20, SafeMath, Ownable {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals; // How many decimals to show.
string public version = "v0.1";
uint public initialSupply;
uint public totalSupply;
bool public locked;
address public preSaleAddress;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
// Lock transfer for contributors during the ICO
modifier onlyUnlocked() {
if (msg.sender != preSaleAddress && locked)
revert();
_;
}
modifier onlyAuthorized() {
if (msg.sender != owner)
revert();
_;
}
// The PPP Token created with the time at which the crowdsale ends
function Token() public {
// Lock the transfCrowdsaleer function during the crowdsale
locked = true;
initialSupply = 165000000e18;
totalSupply = initialSupply;
name = "PayPie"; // Set the name for display purposes
symbol = "PPP"; // Set the symbol for display purposes
decimals = 18; // Amount of decimals for display purposes
preSaleAddress = 0xf8A15b1540d5f9D002D9cCb7FD1F23E795c2859d;
// Allocate tokens for pre-sale customers - private sale
balances[preSaleAddress] = 82499870672369211638818601 - 2534559883e16;
// Allocate tokens for the team/reserve/advisors/
balances[0xF821Fd99BCA2111327b6a411C90BE49dcf78CE0f] = totalSupply - balances[preSaleAddress];
}
function unlock() public onlyAuthorized {
locked = false;
}
function lock() public onlyAuthorized {
locked = true;
}
function burn( address _member, uint256 _value) public onlyAuthorized returns(bool) {
balances[_member] = safeSub(balances[_member], _value);
totalSupply = safeSub(totalSupply, _value);
Transfer(_member, 0x0, _value);
return true;
}
function transfer(address _to, uint _value) public onlyUnlocked returns(bool) {
balances[msg.sender] = safeSub(balances[msg.sender], _value);
balances[_to] = safeAdd(balances[_to], _value);
Transfer(msg.sender, _to, _value);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public onlyUnlocked returns(bool success) {
require(_to != address(0));
require (balances[_from] >= _value); // Check if the sender has enough
require (_value <= allowed[_from][msg.sender]); // Check if allowed is greater or equal
balances[_from] = safeSub(balances[_from], _value); // Subtract from the sender
balances[_to] = safeAdd(balances[_to],_value); // Add the same to the recipient
allowed[_from][msg.sender] = safeSub(allowed[_from][msg.sender],_value); // decrease allowed amount
Transfer(_from, _to, _value);
return true;
}
function balanceOf(address _owner) public view returns(uint balance) {
return balances[_owner];
}
/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
*
* Beware that changing an allowance with this method brings the risk that someone may use both the old
* and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
* race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
* @param _spender The address which will spend the funds.
* @param _value The amount of tokens to be spent.
*/
function approve(address _spender, uint _value) public returns(bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public view returns(uint remaining) {
return allowed[_owner][_spender];
}
/**
* approve should be called when allowed[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
*/
function increaseApproval (address _spender, uint _addedValue) public returns (bool success) {
allowed[msg.sender][_spender] = safeAdd(allowed[msg.sender][_spender], _addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval (address _spender, uint _subtractedValue) public returns (bool success) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
} else {
allowed[msg.sender][_spender] = safeSub(oldValue, _subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}