Contract Name:
BethereumToken
Contract Source Code:
File 1 of 1 : BethereumToken
/*
--------------------------------------------------------------------------------
The Bethereum [BETHER] Token Smart Contract
Credit:
Bethereum Limited
ERC20: https://github.com/ethereum/EIPs/issues/20
ERC223: https://github.com/ethereum/EIPs/issues/223
MIT Licence
--------------------------------------------------------------------------------
*/
/*
* Contract that is working with ERC223 tokens
*/
contract ContractReceiver {
function tokenFallback(address _from, uint _value, bytes _data) {
/* Fix for Mist warning */
_from;
_value;
_data;
}
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
uint256 c = a * b;
assert(a == 0 || c / a == b);
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) {
assert(b <= a);
return a - b;
}
function add(uint256 a, uint256 b) internal constant 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() {
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;
}
}
contract ERC223Interface {
uint public totalSupply;
function balanceOf(address who) constant returns (uint);
event Transfer(address indexed from, address indexed to, uint value, bytes data);
}
contract BethereumERC223 is ERC223Interface {
using SafeMath for uint256;
/* Contract Constants */
string public constant _name = "Bethereum";
string public constant _symbol = "BETHER";
uint8 public constant _decimals = 18;
/* Contract Variables */
address public owner;
mapping(address => uint256) public balances;
mapping(address => mapping (address => uint256)) public allowed;
/* Constructor initializes the owner's balance and the supply */
function BethereumERC223() {
owner = msg.sender;
}
/* ERC20 Events */
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed from, address indexed to, uint256 value);
/* ERC223 Events */
event Transfer(address indexed from, address indexed to, uint value, bytes data);
/* Returns the balance of a particular account */
function balanceOf(address _address) constant returns (uint256 balance) {
return balances[_address];
}
/* Transfer the balance from the sender's address to the address _to */
function transfer(address _to, uint _value) returns (bool success) {
if (balances[msg.sender] >= _value
&& _value > 0
&& balances[_to] + _value > balances[_to]) {
bytes memory empty;
if(isContract(_to)) {
return transferToContract(_to, _value, empty);
} else {
return transferToAddress(_to, _value, empty);
}
} else {
return false;
}
}
/* Withdraws to address _to form the address _from up to the amount _value */
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
if (balances[_from] >= _value
&& allowed[_from][msg.sender] >= _value
&& _value > 0
&& balances[_to] + _value > balances[_to]) {
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
balances[_to] += _value;
Transfer(_from, _to, _value);
return true;
} else {
return false;
}
}
/* Allows _spender to withdraw the _allowance amount form sender */
function approve(address _spender, uint256 _allowance) returns (bool success) {
allowed[msg.sender][_spender] = _allowance;
Approval(msg.sender, _spender, _allowance);
return true;
}
/* Checks how much _spender can withdraw from _owner */
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/* ERC223 Functions */
/* Get the contract constant _name */
function name() constant returns (string name) {
return _name;
}
/* Get the contract constant _symbol */
function symbol() constant returns (string symbol) {
return _symbol;
}
/* Get the contract constant _decimals */
function decimals() constant returns (uint8 decimals) {
return _decimals;
}
/* Transfer the balance from the sender's address to the address _to with data _data */
function transfer(address _to, uint _value, bytes _data) returns (bool success) {
if (balances[msg.sender] >= _value
&& _value > 0
&& balances[_to] + _value > balances[_to]) {
if(isContract(_to)) {
return transferToContract(_to, _value, _data);
} else {
return transferToAddress(_to, _value, _data);
}
} else {
return false;
}
}
/* Transfer function when _to represents a regular address */
function transferToAddress(address _to, uint _value, bytes _data) internal returns (bool success) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
Transfer(msg.sender, _to, _value, _data);
return true;
}
/* Transfer function when _to represents a contract address, with the caveat
that the contract needs to implement the tokenFallback function in order to receive tokens */
function transferToContract(address _to, uint _value, bytes _data) internal returns (bool success) {
balances[msg.sender] -= _value;
balances[_to] += _value;
ContractReceiver receiver = ContractReceiver(_to);
receiver.tokenFallback(msg.sender, _value, _data);
Transfer(msg.sender, _to, _value);
Transfer(msg.sender, _to, _value, _data);
return true;
}
/* Infers if whether _address is a contract based on the presence of bytecode */
function isContract(address _address) internal returns (bool is_contract) {
uint length;
if (_address == 0) return false;
assembly {
length := extcodesize(_address)
}
if(length > 0) {
return true;
} else {
return false;
}
}
/* Stops any attempt to send Ether to this contract */
function () {
throw;
}
}
/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is Ownable {
event Pause();
event Unpause();
bool public paused = false;
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!paused);
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(paused);
_;
}
/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() onlyOwner whenNotPaused public {
paused = true;
Pause();
}
/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() onlyOwner whenPaused public {
paused = false;
Unpause();
}
}
/**
* @title Pausable token
*
* @dev StandardToken modified with pausable transfers.
**/
contract PausableToken is BethereumERC223, Pausable {
function transfer(address _to, uint256 _value, bytes _data) public whenNotPaused returns (bool) {
return super.transfer(_to, _value, _data);
}
function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
return super.transferFrom(_from, _to, _value);
}
function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
return super.approve(_spender, _value);
}
}
/**
* @title Mintable token
* @dev Simple ERC20 Token example, with mintable token creation
* @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
* Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
*/
contract MintableToken is BethereumERC223, Ownable {
event Mint(address indexed to, uint256 amount);
event MintFinished();
bool public mintingFinished = false;
modifier canMint() {
require(!mintingFinished);
_;
}
/**
* @dev Function to mint tokens
* @param _to The address that will receive the minted tokens.
* @param _amount The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
totalSupply = totalSupply.add(_amount);
balances[_to] = balances[_to].add(_amount);
Mint(_to, _amount);
Transfer(address(0), _to, _amount);
return true;
}
/**
* @dev Function to stop minting new tokens.
* @return True if the operation was successful.
*/
function finishMinting() onlyOwner canMint public returns (bool) {
mintingFinished = true;
MintFinished();
return true;
}
}
contract BethereumToken is MintableToken, PausableToken {
function BethereumToken(){
pause();
}
}
/**
* @title Crowdsale
* @dev Crowdsale is a base contract for managing a token crowdsale.
* Crowdsales have a start and end timestamps, where investors can make
* token purchases and the crowdsale will assign them tokens based
* on a token per ETH rate. Funds collected are forwarded to a wallet
* as they arrive.
*/
contract Crowdsale {
using SafeMath for uint256;
// The token being sold
MintableToken public token;
// start and end timestamps where investments are allowed (both inclusive)
uint256 public startTime;
uint256 public endTime;
// address where funds are collected
address public wallet;
// amount of raised money in wei
uint256 public weiRaised;
/**
* event for token purchase logging
* @param purchaser who paid for the tokens
* @param beneficiary who got the tokens
* @param value weis paid for purchase
* @param amount amount of tokens purchased
*/
event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);
function Crowdsale(uint256 _endTime, address _wallet) {
require(_endTime >= now);
require(_wallet != 0x0);
token = createTokenContract();
endTime = _endTime;
wallet = _wallet;
}
// creates the token to be sold.
// override this method to have crowdsale of a specific mintable token.
function createTokenContract() internal returns (BethereumToken) {
return new BethereumToken();
}
// fallback function can be used to buy tokens
function () payable {
buyTokens(msg.sender);
}
// low level token purchase function
function buyTokens(address beneficiary) public payable { }
// send ether to the fund collection wallet
// override to create custom fund forwarding mechanisms
function forwardFunds() internal {
wallet.transfer(msg.value);
}
// @return true if the transaction can buy tokens
function validPurchase() internal constant returns (bool) {
bool withinPeriod = now >= startTime && now <= endTime;
bool nonZeroPurchase = msg.value != 0;
return withinPeriod && nonZeroPurchase;
}
// @return true if crowdsale event has ended
function hasEnded() public constant returns (bool) {
return now > endTime;
}
}
/**
* @title FinalizableCrowdsale
* @dev Extension of Crowdsale where an owner can do extra work
* after finishing.
*/
contract FinalizableCrowdsale is Crowdsale, Ownable {
using SafeMath for uint256;
bool public isFinalized = false;
bool public weiCapReached = false;
event Finalized();
/**
* @dev Must be called after crowdsale ends, to do some extra finalization
* work. Calls the contract's finalization function.
*/
function finalize() onlyOwner public {
require(!isFinalized);
finalization();
Finalized();
isFinalized = true;
}
/**
* @dev Can be overridden to add finalization logic. The overriding function
* should call super.finalization() to ensure the chain of finalization is
* executed entirely.
*/
function finalization() internal {
}
}
contract BETHERTokenSale is FinalizableCrowdsale {
using SafeMath for uint256;
// Define sale
uint public constant RATE = 17500;
uint public constant TOKEN_SALE_LIMIT = 25000 * 1000000000000000000;
uint256 public constant TOKENS_FOR_OPERATIONS = 400000000*(10**18);
uint256 public constant TOKENS_FOR_SALE = 600000000*(10**18);
uint public constant TOKENS_FOR_PRESALE = 315000000*(1 ether / 1 wei);
uint public BONUS_PERCENTAGE;
enum Phase {
Created,
CrowdsaleRunning,
Paused
}
Phase public currentPhase = Phase.Created;
event LogPhaseSwitch(Phase phase);
// Constructor
function BETHERTokenSale(
uint256 _end,
address _wallet
)
FinalizableCrowdsale()
Crowdsale(_end, _wallet) {
}
function setNewBonusScheme(uint _bonusPercentage) {
BONUS_PERCENTAGE = _bonusPercentage;
}
function mintRawTokens(address _buyer, uint256 _newTokens) public onlyOwner {
token.mint(_buyer, _newTokens);
}
/// @dev Lets buy you some tokens.
function buyTokens(address _buyer) public payable {
// Available only if presale or crowdsale is running.
require(currentPhase == Phase.CrowdsaleRunning);
require(_buyer != address(0));
require(msg.value > 0);
require(validPurchase());
uint tokensWouldAddTo = 0;
uint weiWouldAddTo = 0;
uint256 weiAmount = msg.value;
uint newTokens = msg.value.mul(RATE);
weiWouldAddTo = weiRaised.add(weiAmount);
require(weiWouldAddTo <= TOKEN_SALE_LIMIT);
newTokens = addBonusTokens(token.totalSupply(), newTokens);
tokensWouldAddTo = newTokens.add(token.totalSupply());
require(tokensWouldAddTo <= TOKENS_FOR_SALE);
token.mint(_buyer, newTokens);
TokenPurchase(msg.sender, _buyer, weiAmount, newTokens);
weiRaised = weiWouldAddTo;
forwardFunds();
if (weiRaised == TOKENS_FOR_SALE){
weiCapReached = true;
}
}
// @dev Adds bonus tokens by token supply bought by user
// @param _totalSupply total supply of token bought during pre-sale/crowdsale
// @param _newTokens tokens currently bought by user
function addBonusTokens(uint256 _totalSupply, uint256 _newTokens) internal view returns (uint256) {
uint returnTokens;
uint tokens = _newTokens;
returnTokens = tokens.add(tokens.mul(BONUS_PERCENTAGE).div(100));
return returnTokens;
}
function setSalePhase(Phase _nextPhase) public onlyOwner {
currentPhase = _nextPhase;
LogPhaseSwitch(_nextPhase);
}
function transferTokenOwnership(address _newOwner) {
token.transferOwnership(_newOwner);
}
// Finalize
function finalization() internal {
uint256 toMint = TOKENS_FOR_OPERATIONS;
token.mint(wallet, toMint);
token.finishMinting();
token.transferOwnership(wallet);
}
}