Contract Source Code:
File 1 of 1 : IRBToken
pragma solidity ^0.4.15;
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
if (a != 0 && c / a != b) revert();
return c;
}
function div(uint256 a, uint256 b) internal constant 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 constant returns (uint256) {
if (b > a) revert();
return a - b;
}
function add(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a + b;
if (c < a) revert();
return c;
}
}
contract ERC20Basic {
uint256 public totalSupply;
function balanceOf(address who) public constant returns (uint256);
function transfer(address to, uint256 value) public returns (bool);
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 constant returns (uint256);
function transferFrom(address from, address to, uint256 value) public returns (bool);
function approve(address spender, uint256 value) public returns (bool);
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;
mapping (address => uint256) balances;
/**
* @dev transfer token for a specified address
* @param _to The address to transfer to.
* @param _value The amount to be transferred.
*/
function transfer(address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
// SafeMath.sub will throw if there is not enough balance.
balances[msg.sender] = balances[msg.sender].sub(_value);
balances[_to] = balances[_to].add(_value);
Transfer(msg.sender, _to, _value);
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 constant 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
* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract StandardToken is ERC20, BasicToken {
mapping (address => mapping (address => uint256)) 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 _value uint256 the amount of tokens to be transferred
*/
function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
require(_to != address(0));
uint256 _allowance = allowed[_from][msg.sender];
// Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
// require (_value <= _allowance);
balances[_from] = balances[_from].sub(_value);
balances[_to] = balances[_to].add(_value);
allowed[_from][msg.sender] = _allowance.sub(_value);
Transfer(_from, _to, _value);
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 _value The amount of tokens to be spent.
*/
function approve(address _spender, uint256 _value) public returns (bool) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
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 constant returns (uint256 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)
returns (bool success) {
allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
function decreaseApproval(address _spender, uint _subtractedValue)
returns (bool success) {
uint oldValue = allowed[msg.sender][_spender];
if (_subtractedValue > oldValue) {
allowed[msg.sender][_spender] = 0;
}
else {
allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
}
Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
return true;
}
}
/**
* @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() {
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) onlyOwner public {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/**
* @title IRBTokens
* @dev IRB Token contract based on Zeppelin StandardToken contract
*/
contract IRBToken is StandardToken, Ownable {
using SafeMath for uint256;
/**
* @dev ERC20 descriptor variables
*/
string public constant name = "IRB Tokens";
string public constant symbol = "IRB";
uint8 public decimals = 18;
/**
* @dev 489.58 millions s the initial Token sale
*/
uint256 public constant crowdsaleTokens = 489580 * 10 ** 21;
/**
* @dev 10.42 millions is the initial Token presale
*/
uint256 public constant preCrowdsaleTokens = 10420 * 10 ** 21;
// TODO: TestRPC addresses, replace to real
// PRE Crowdsale Tokens Wallet
address public constant preCrowdsaleTokensWallet = 0x0CD95a59fAd089c4EBCCEB54f335eC8f61Caa80e;
// Crowdsale Tokens Wallet
address public constant crowdsaleTokensWallet = 0x48545E41696Dc51020C35cA8C36b678101a98437;
/**
* @dev Address of PRE Crowdsale contract which will be compared
* against in the appropriate modifier check
*/
address public preCrowdsaleContractAddress;
/**
* @dev Address of Crowdsale contract which will be compared
* against in the appropriate modifier check
*/
address public crowdsaleContractAddress;
/**
* @dev variable that holds flag of ended pre tokensake
*/
bool isPreFinished = false;
/**
* @dev variable that holds flag of ended tokensake
*/
bool isFinished = false;
/**
* @dev Modifier that allow only the Crowdsale contract to be sender
*/
modifier onlyPreCrowdsaleContract() {
require(msg.sender == preCrowdsaleContractAddress);
_;
}
/**
* @dev Modifier that allow only the Crowdsale contract to be sender
*/
modifier onlyCrowdsaleContract() {
require(msg.sender == crowdsaleContractAddress);
_;
}
/**
* @dev event for the burnt tokens after crowdsale logging
* @param tokens amount of tokens available for crowdsale
*/
event TokensBurnt(uint256 tokens);
/**
* @dev event for the tokens contract move to the active state logging
* @param supply amount of tokens left after all the unsold was burned
*/
event Live(uint256 supply);
/**
* @dev Contract constructor
*/
function IRBToken() {
// Issue pre crowdsale tokens
balances[preCrowdsaleTokensWallet] = balanceOf(preCrowdsaleTokensWallet).add(preCrowdsaleTokens);
Transfer(address(0), preCrowdsaleTokensWallet, preCrowdsaleTokens);
// Issue crowdsale tokens
balances[crowdsaleTokensWallet] = balanceOf(crowdsaleTokensWallet).add(crowdsaleTokens);
Transfer(address(0), crowdsaleTokensWallet, crowdsaleTokens);
// 500 millions tokens overall
totalSupply = crowdsaleTokens.add(preCrowdsaleTokens);
}
/**
* @dev back link IRBToken contract with IRBPreCrowdsale one
* @param _preCrowdsaleAddress non zero address of IRBPreCrowdsale contract
*/
function setPreCrowdsaleAddress(address _preCrowdsaleAddress) onlyOwner external {
require(_preCrowdsaleAddress != address(0));
preCrowdsaleContractAddress = _preCrowdsaleAddress;
// Allow pre crowdsale contract
uint256 balance = balanceOf(preCrowdsaleTokensWallet);
allowed[preCrowdsaleTokensWallet][preCrowdsaleContractAddress] = balance;
Approval(preCrowdsaleTokensWallet, preCrowdsaleContractAddress, balance);
}
/**
* @dev back link IRBToken contract with IRBCrowdsale one
* @param _crowdsaleAddress non zero address of IRBCrowdsale contract
*/
function setCrowdsaleAddress(address _crowdsaleAddress) onlyOwner external {
require(isPreFinished);
require(_crowdsaleAddress != address(0));
crowdsaleContractAddress = _crowdsaleAddress;
// Allow crowdsale contract
uint256 balance = balanceOf(crowdsaleTokensWallet);
allowed[crowdsaleTokensWallet][crowdsaleContractAddress] = balance;
Approval(crowdsaleTokensWallet, crowdsaleContractAddress, balance);
}
/**
* @dev called only by linked IRBPreCrowdsale contract to end precrowdsale.
*/
function endPreTokensale() onlyPreCrowdsaleContract external {
require(!isPreFinished);
uint256 preCrowdsaleLeftovers = balanceOf(preCrowdsaleTokensWallet);
if (preCrowdsaleLeftovers > 0) {
balances[preCrowdsaleTokensWallet] = 0;
balances[crowdsaleTokensWallet] = balances[crowdsaleTokensWallet].add(preCrowdsaleLeftovers);
Transfer(preCrowdsaleTokensWallet, crowdsaleTokensWallet, preCrowdsaleLeftovers);
}
isPreFinished = true;
}
/**
* @dev called only by linked IRBCrowdsale contract to end crowdsale.
*/
function endTokensale() onlyCrowdsaleContract external {
require(!isFinished);
uint256 crowdsaleLeftovers = balanceOf(crowdsaleTokensWallet);
if (crowdsaleLeftovers > 0) {
totalSupply = totalSupply.sub(crowdsaleLeftovers);
balances[crowdsaleTokensWallet] = 0;
Transfer(crowdsaleTokensWallet, address(0), crowdsaleLeftovers);
TokensBurnt(crowdsaleLeftovers);
}
isFinished = true;
Live(totalSupply);
}
}