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pragma solidity ^0.4.19;
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title ERC20Basic
* @dev Simpler version of ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/179
*/
contract ERC20Basic {
/// Total amount of tokens
uint256 public totalSupply;
function balanceOf(address _owner) public view returns (uint256 balance);
function transfer(address _to, uint256 _amount) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
contract ERC20 is ERC20Basic {
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success);
function approve(address _spender, uint256 _amount) public returns (bool success);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @title Basic token
* @dev Basic version of StandardToken, with no allowances.
*/
contract BasicToken is ERC20Basic {
using SafeMath for uint256;
uint balanceOfParticipant;
uint lockedAmount;
uint allowedAmount;
//balance in each address account
mapping(address => uint256) balances;
struct Lockup
{
uint256 lockupTime;
uint256 lockupAmount;
}
Lockup lockup;
mapping(address=>Lockup) lockupParticipants;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _amount The amount to be transferred.
*/
function transfer(address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[msg.sender] >= _amount && _amount > 0
&& balances[_to].add(_amount) > balances[_to]);
if (lockupParticipants[msg.sender].lockupAmount>0)
{
uint timePassed = now - lockupParticipants[msg.sender].lockupTime;
//12 months have passed
if (timePassed <92 days)
{
//only 5% amount is unlocked
balanceOfParticipant = balances[msg.sender];
lockedAmount = lockupParticipants[msg.sender].lockupAmount;
allowedAmount = lockedAmount.mul(5).div(100);
require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
}
//3 months have passed
else if (timePassed >= 92 days && timePassed < 183 days)
{
//upto 30% amount is unlocked
balanceOfParticipant = balances[msg.sender];
lockedAmount = lockupParticipants[msg.sender].lockupAmount;
allowedAmount = lockedAmount.mul(30).div(100);
require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
}
//6 months have passed
else if (timePassed >= 183 days && timePassed < 365 days)
{
//upto 55% amount is unlocked
balanceOfParticipant = balances[msg.sender];
lockedAmount = lockupParticipants[msg.sender].lockupAmount;
allowedAmount = lockedAmount.mul(55).div(100);
require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
}
else if (timePassed > 365 days)
{
//do nothing, any amount is allowed -- all amount has been unlocked
}
}
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_amount);
balances[_to] = balances[_to].add(_amount);
emit Transfer(msg.sender, _to, _amount);
return true;
}
/**
* @dev Gets the balance of the specified address.
* @param _owner The address to query the the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
}
/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* @dev https://github.com/ethereum/EIPs/issues/20
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) internal allowed;
/**
* @dev Transfer tokens from one address to another
* @param _from address The address which you want to send tokens from
* @param _to address The address which you want to transfer to
* @param _amount uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _amount) public returns (bool success) {
require(_to != address(0));
require(balances[_from] >= _amount);
require(allowed[_from][msg.sender] >= _amount);
require(_amount > 0 && balances[_to].add(_amount) > balances[_to]);
if (lockupParticipants[_from].lockupAmount>0)
{
uint timePassed = now - lockupParticipants[_from].lockupTime;
//12 months have passed
if (timePassed <92 days)
{
//only 5% amount is unlocked
balanceOfParticipant = balances[_from];
lockedAmount = lockupParticipants[_from].lockupAmount;
allowedAmount = lockedAmount.mul(5).div(100);
require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
}
//3 months have passed
else if (timePassed >= 92 days && timePassed < 183 days)
{
//upto 30% amount is unlocked
balanceOfParticipant = balances[_from];
lockedAmount = lockupParticipants[_from].lockupAmount;
allowedAmount = lockedAmount.mul(30).div(100);
require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
}
//6 months have passed
else if (timePassed >= 183 days && timePassed < 365 days)
{
//upto 55% amount is unlocked
balanceOfParticipant = balances[_from];
lockedAmount = lockupParticipants[_from].lockupAmount;
allowedAmount = lockedAmount.mul(55).div(100);
require(balanceOfParticipant.sub(_amount)>=lockedAmount.sub(allowedAmount));
}
else if (timePassed > 365 days)
{
//do nothing, any amount is allowed -- all amount has been unlocked
}
}
balances[_from] = balances[_from].sub(_amount);
balances[_to] = balances[_to].add(_amount);
allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_amount);
emit Transfer(_from, _to, _amount);
return true;
}
/**
* @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 _amount The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _amount) public returns (bool success) {
allowed[msg.sender][_spender] = _amount;
emit Approval(msg.sender, _spender, _amount);
return true;
}
/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @param _owner address The address which owns the funds.
* @param _spender address The address which will spend the funds.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
/**
* @title Burnable Token
* @dev Token that can be irreversibly burned (destroyed).
*/
contract BurnableToken is StandardToken, Ownable {
event Burn(address indexed burner, uint256 value);
/**
* @dev Burns a specific amount of tokens.
* @param _value The amount of token to be burned.
*/
function burn(uint256 _value) public onlyOwner{
require(_value <= balances[msg.sender]);
// no need to require value <= totalSupply, since that would imply the
// sender's balance is greater than the totalSupply, which *should* be an assertion failure
balances[msg.sender] = balances[msg.sender].sub(_value);
totalSupply = totalSupply.sub(_value);
emit Burn(msg.sender, _value);
}
}
/**
* @title PVC Token
* @dev Token representing PVC.
*/
contract PVCToken is BurnableToken {
string public name ;
string public symbol ;
uint8 public decimals = 18 ;
/**
*@dev users sending ether to this contract will be reverted. Any ether sent to the contract will be sent back to the caller
*/
function ()public payable {
revert();
}
/**
* @dev Constructor function to initialize the initial supply of token to the creator of the contract
*/
function PVCToken(address wallet) public {
owner = wallet;
totalSupply = uint(50000000).mul( 10 ** uint256(decimals)); //Update total supply with the decimal amount
name = "Pryvate";
symbol = "PVC";
balances[wallet] = totalSupply;
//Emitting transfer event since assigning all tokens to the creator also corresponds to the transfer of tokens to the creator
emit Transfer(address(0), msg.sender, totalSupply);
}
/**
*@dev helper method to get token details, name, symbol and totalSupply in one go
*/
function getTokenDetail() public view returns (string, string, uint256) {
return (name, symbol, totalSupply);
}
function teamVesting(address[] teamMembers, uint[] tokens) public onlyOwner
{
require(teamMembers.length == tokens.length);
for (uint i=0;i<teamMembers.length;i++)
{
tokens[i] = tokens[i].mul(10**18);
require(teamMembers[i] != address(0));
require(balances[owner] >= tokens[i] && tokens[i] > 0
&& balances[teamMembers[i]].add(tokens[i]) > balances[teamMembers[i]]);
// SafeMath.sub will throw if there is not enough balance.
balances[owner] = balances[owner].sub(tokens[i]);
balances[teamMembers[i]] = balances[teamMembers[i]].add(tokens[i]);
emit Transfer(owner, teamMembers[i], tokens[i]);
lockup = Lockup({lockupTime:now,lockupAmount:tokens[i]});
lockupParticipants[teamMembers[i]] = lockup;
}
}
function advisorVesting(address[] advisors, uint[] tokens) public onlyOwner
{
require(advisors.length == tokens.length);
for (uint i=0;i<advisors.length;i++)
{
tokens[i] = tokens[i].mul(10**18);
require(advisors[i] != address(0));
require(balances[owner] >= tokens[i] && tokens[i] > 0
&& balances[advisors[i]].add(tokens[i]) > balances[advisors[i]]);
// SafeMath.sub will throw if there is not enough balance.
balances[owner] = balances[owner].sub(tokens[i]);
balances[advisors[i]] = balances[advisors[i]].add(tokens[i]);
emit Transfer(owner, advisors[i], tokens[i]);
lockup = Lockup({lockupTime:now,lockupAmount:tokens[i]});
lockupParticipants[advisors[i]] = lockup;
}
}
}