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pragma solidity ^0.4.13;
contract owned {
address public owner;
mapping (address => bool) public admins;
function owned() {
owner = msg.sender;
admins[msg.sender]=true;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
modifier onlyAdmin {
require(admins[msg.sender] == true);
_;
}
function transferOwnership(address newOwner) onlyOwner {
owner = newOwner;
}
function makeAdmin(address newAdmin, bool isAdmin) onlyOwner {
admins[newAdmin] = isAdmin;
}
}
interface tokenRecipient {
function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData);
}
contract GRX is owned {
// Public variables of the token
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
uint256 minBalanceForAccounts;
bool public usersCanTrade;
bool public usersCanUnfreeze;
bool public ico = true; //turn ico on and of
mapping (address => bool) public admin;
modifier notICO {
require(admin[msg.sender] || !ico);
_;
}
// This creates an array with all balances
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
mapping (address => bool) public frozen;
mapping (address => bool) public canTrade; //user allowed to buy or sell
// 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 even on the blockhcain when an address is reward
event Reward(address from, address to, uint256 value, string data, uint256 time);
// This notifies clients about the amount burnt
event Burn(address indexed from, uint256 value);
// This generates a public event on the blockchain that will notify clients
event Frozen(address indexed addr, bool frozen);
// This generates a public event on the blockchain that will notify clients
event Unlock(address indexed addr, address from, uint256 val);
// This generates a public event on the blockchain that will notify clients
// This generates a public event on the blockchain that will notify clients
// event Unfreeze(address indexed addr);
/**
* Constrctor function
*
* Initializes contract with initial supply tokens to the creator of the contract
*/
function GRX() {
uint256 initialSupply = 20000000000000000000000000;
balanceOf[msg.sender] = initialSupply ; // Give the creator all initial tokens
totalSupply = initialSupply; // Update total supply
name = "Gold Reward Token"; // Set the name for display purposes
symbol = "GRX"; // Set the symbol for display purposes
decimals = 18; // Amount of decimals for display purposes
minBalanceForAccounts = 1000000000000000;
usersCanTrade=false;
usersCanUnfreeze=false;
admin[msg.sender]=true;
canTrade[msg.sender]=true;
}
/**
* Increace Total Supply
*
* Increases the total coin supply
*/
function increaseTotalSupply (address target, uint256 increaseBy ) onlyOwner {
balanceOf[target] += increaseBy;
totalSupply += increaseBy;
Transfer(0, owner, increaseBy);
Transfer(owner, target, increaseBy);
}
function usersCanUnFreeze(bool can) {
usersCanUnfreeze=can;
}
function setMinBalance(uint minimumBalanceInWei) onlyOwner {
minBalanceForAccounts = minimumBalanceInWei;
}
/**
* transferAndFreeze
*
* Function to transfer to and freeze and account at the same time
*/
function transferAndFreeze (address target, uint256 amount ) onlyAdmin {
_transfer(msg.sender, target, amount);
freeze(target, true);
}
/**
* _freeze internal
*
* function to freeze an account
*/
function _freeze (address target, bool froze ) internal {
frozen[target]=froze;
Frozen(target, froze);
}
/**
* freeze
*
* function to freeze an account
*/
function freeze (address target, bool froze ) {
if(froze || (!froze && !usersCanUnfreeze)) {
require(admin[msg.sender]);
}
_freeze(target, froze);
}
/**
* Internal transfer, only can be called by this contract
*/
function _transfer(address _from, address _to, uint _value) internal {
require(_to != 0x0); // Prevent transfer to 0x0 address. Use burn() instead
require(!frozen[_from]); //prevent transfer from frozen address
require(balanceOf[_from] >= _value); // Check if the sender has enough
require(balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
balanceOf[_from] -= _value; // Subtract from the sender
balanceOf[_to] += _value; // Add the same to the recipient
Transfer(_from, _to, _value);
}
/**
* 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) notICO {
require(!frozen[msg.sender]); //prevent transfer from frozen address
if (msg.sender.balance < minBalanceForAccounts) {
sell((minBalanceForAccounts - msg.sender.balance) * sellPrice);
}
_transfer(msg.sender, _to, _value);
}
mapping (address => uint256) public totalLockedRewardsOf;
mapping (address => mapping (address => uint256)) public lockedRewardsOf; //balance of a locked reward
mapping (address => mapping (uint32 => address)) public userRewarders; //indexed list of rewardees rewarder
mapping (address => mapping (address => uint32)) public userRewardCount; //a list of number of times a customer has received reward from a given merchant
mapping (address => uint32) public userRewarderCount; //number of rewarders per customer
//merchant
mapping (address => uint256 ) public totalRewardIssuedOut;
/**
* Reward tokens - tokens go to
*
* Send `_value` tokens to `_to` from your account
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function reward(address _to, uint256 _value, bool locked, string data) {
require(_to != 0x0);
require(!frozen[msg.sender]); //prevent transfer from frozen address
if (msg.sender.balance < minBalanceForAccounts) {
sell((minBalanceForAccounts - msg.sender.balance) * sellPrice);
}
if(!locked) {
_transfer(msg.sender, _to, _value);
}else{
//prevent transfer from frozen address
require(balanceOf[msg.sender] >= _value); // Check if the sender has enough
require(totalLockedRewardsOf[_to] + _value > totalLockedRewardsOf[_to]); // Check for overflows
balanceOf[msg.sender] -= _value; // Subtract from the sender
totalLockedRewardsOf[_to] += _value; // Add the same to the recipient
lockedRewardsOf[_to][msg.sender] += _value;
if(userRewardCount[_to][msg.sender]==0) {
userRewarderCount[_to] += 1;
userRewarders[_to][userRewarderCount[_to]]=msg.sender;
}
userRewardCount[_to][msg.sender]+=1;
totalRewardIssuedOut[msg.sender]+= _value;
Transfer(msg.sender, _to, _value);
}
Reward(msg.sender, _to, _value, data, now);
}
/**
* Transfer locked rewards
*
* Send `_value` tokens to `_to` merchant
*
* @param _to The address of the recipient
* @param _value the amount to send
*/
function transferReward(address _to, uint256 _value) {
require(!frozen[msg.sender]); //prevent transfer from frozen address
require(lockedRewardsOf[msg.sender][_to] >= _value );
require(totalLockedRewardsOf[msg.sender] >= _value);
if (msg.sender.balance < minBalanceForAccounts) {
sell((minBalanceForAccounts - msg.sender.balance) * sellPrice);
}
totalLockedRewardsOf[msg.sender] -= _value; // Add the same to the recipient
lockedRewardsOf[msg.sender][_to] -= _value;
balanceOf[_to] += _value;
Transfer(msg.sender, _to, _value);
}
/**
* Unlocked locked rewards by merchant
*
* Unlock `_value` tokens of `add`
*
* @param addr The address of the recipient
* @param _value the amount to unlock
*/
function unlockReward(address addr, uint256 _value) {
require(totalLockedRewardsOf[addr] > _value); //prevent transfer from frozen address
require(lockedRewardsOf[addr][msg.sender] >= _value );
if(_value==0) _value=lockedRewardsOf[addr][msg.sender];
if (msg.sender.balance < minBalanceForAccounts) {
sell((minBalanceForAccounts - msg.sender.balance) * sellPrice);
}
totalLockedRewardsOf[addr] -= _value; // Add the same to the recipient
lockedRewardsOf[addr][msg.sender] -= _value;
balanceOf[addr] += _value;
Unlock(addr, msg.sender, _value);
}
/**
* Transfer tokens from other address
*
* Send `_value` tokens to `_to` in 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) returns (bool success) {
require(!frozen[_from]); //prevent transfer from frozen address
require(_value <= allowance[_from][msg.sender]); // Check allowance
allowance[_from][msg.sender] -= _value;
_transfer(_from, _to, _value);
return true;
}
/**
* Set allowance for other address
*
* Allows `_spender` to spend no more than `_value` tokens in your behalf
*
* @param _spender The address authorized to spend
* @param _value the max amount they can spend
*/
function approve(address _spender, uint256 _value)
returns (bool success) {
allowance[msg.sender][_spender] = _value;
return true;
}
/**
* Set allowance for other address and notify
*
* Allows `_spender` to spend no more than `_value` tokens in 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) onlyOwner
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) onlyOwner 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;
}
/**
* Destroy tokens from other ccount
*
* 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) 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
Burn(_from, _value);
return true;
}
/*
function increaseSupply(address _from, uint256 _value) onlyOwner returns (bool success) {
balanceOf[_from] += _value; // Subtract from the targeted balance
totalSupply += _value; // Update totalSupply
// Burn(_from, _value);
return true;
}
*/
uint256 public sellPrice = 608;
uint256 public buyPrice = 760;
function setPrices(uint256 newSellPrice, uint256 newBuyPrice) onlyOwner {
sellPrice = newSellPrice;
buyPrice = newBuyPrice;
}
function setUsersCanTrade(bool trade) onlyOwner {
usersCanTrade=trade;
}
function setCanTrade(address addr, bool trade) onlyOwner {
canTrade[addr]=trade;
}
//user is buying grx
function buy() payable returns (uint256 amount){
if(!usersCanTrade && !canTrade[msg.sender]) revert();
amount = msg.value * buyPrice; // calculates the amount
require(balanceOf[this] >= amount); // checks if it has enough to sell
balanceOf[msg.sender] += amount; // adds the amount to buyer's balance
balanceOf[this] -= amount; // subtracts amount from seller's balance
Transfer(this, msg.sender, amount); // execute an event reflecting the change
return amount; // ends function and returns
}
//user is selling us grx, we are selling eth to the user
function sell(uint256 amount) returns (uint revenue){
require(!frozen[msg.sender]);
if(!usersCanTrade && !canTrade[msg.sender]) {
require(minBalanceForAccounts > amount/sellPrice);
}
require(balanceOf[msg.sender] >= amount); // checks if the sender has enough to sell
balanceOf[this] += amount; // adds the amount to owner's balance
balanceOf[msg.sender] -= amount; // subtracts the amount from seller's balance
revenue = amount / sellPrice;
require(msg.sender.send(revenue)); // sends ether to the seller: it's important to do this last to prevent recursion attacks
Transfer(msg.sender, this, amount); // executes an event reflecting on the change
return revenue; // ends function and returns
}
function() payable {
}
event Withdrawn(address indexed to, uint256 value);
function withdraw(address target, uint256 amount) onlyOwner {
target.transfer(amount);
Withdrawn(target, amount);
}
function setAdmin(address addr, bool enabled) onlyOwner {
admin[addr]=enabled;
}
function setICO(bool enabled) onlyOwner {
ico=enabled;
}
} |