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ICOToken.sol
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ICOToken.sol
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pragma solidity ^0.4.24;
contract SafeMath {
function safeAdd(uint a, uint b) internal pure returns (uint c) {
c = a + b;
require(c >= a);
}
function safeSub(uint a, uint b) internal pure returns (uint c) {
require(b <= a);
c = a - b;
}
function safeMul(uint a, uint b) internal pure returns (uint c) {
c = a * b;
require(a == 0 || c / a == b);
}
function safeDiv(uint a, uint b) internal pure returns (uint c) {
require(b > 0);
c = a / b;
}
}
contract ERC20Interface {
function totalSupply() public constant returns (uint);
function balanceOf(address tokenOwner) public constant returns (uint balance);
function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
function transfer(address to, uint tokens) public returns (bool success);
function approve(address spender, uint tokens) public returns (bool success);
function transferFrom(address from, address to, uint tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}
contract Owned {
address public owner;
address public newOwner;
event OwnershipTransferred(address indexed _from, address indexed _to);
constructor() public {
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function transferOwnership(address _newOwner) public onlyOwner {
newOwner = _newOwner;
}
function acceptOwnership() public {
require(msg.sender == newOwner);
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
newOwner = address(0);
}
}
contract EgroPostIco is ERC20Interface, Owned, SafeMath {
string public symbol;
string public name;
uint8 public decimals;
uint totalsupply;
uint public presale_token;
uint public total_crowdsale_token;
uint256 public constant tokenExchangeRate = 100; // 100 tokens per 1 wei
struct presale{
uint startDate;
uint endDate;
uint pretoken;
uint discount;
}
struct crowdsale{
uint crowd_startdate;
uint hardcap;
uint softcap;
uint crowd_enddate;
}
presale[] public presale_array;
crowdsale public crowdsale_obj;
mapping(address => uint) balances;
mapping(address => mapping(address => uint)) allowed;
constructor(uint _totalSupply) public {
symbol = "DEMO";
name = "CHANGE NAME";
decimals = 18;
totalsupply = _totalSupply;
}
function start_presale(uint _startdate,uint _enddate,uint token_for_presale,uint _discount) public onlyOwner{
if(_startdate <= _enddate && _startdate > now && token_for_presale < totalsupply)
{
for(uint start=0; start < presale_array.length; start++)
{
if(presale_array[start].endDate >= _startdate || presale_array[start].discount <= _discount)
{
revert("Another Sale is running");
}
}
presale memory p= presale(_startdate,_enddate,token_for_presale,_discount);
presale_array.push(p);
presale_token += token_for_presale;
total_crowdsale_token = totalsupply-presale_token;
}
else
{
revert("Presale not set");
}
}
function start_crowdsale(uint _startdate,uint _enddate,uint _softcap) public onlyOwner{
if(_startdate <= _enddate && _startdate > now && _softcap < total_crowdsale_token)
{
crowdsale_obj.crowd_startdate = _startdate;
crowdsale_obj.crowd_enddate = _enddate;
crowdsale_obj.softcap = _softcap;
crowdsale_obj.hardcap = total_crowdsale_token - _softcap;
}
else
{
revert("Crowdasale not set");
}
}
function totalSupply() public constant returns (uint) {
return totalsupply - balances[address(0)];
}
function balanceOf(address tokenOwner) public constant returns (uint balance) {
return balances[tokenOwner];
}
function transfer(address to, uint tokens) public returns (bool success) {
balances[msg.sender] = safeSub(balances[msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(msg.sender, to, tokens);
return true;
}
function approve(address spender, uint tokens) public returns (bool success) {
allowed[msg.sender][spender] = tokens;
emit Approval(msg.sender, spender, tokens);
return true;
}
function transferFrom(address from, address to, uint tokens) public returns (bool success) {
balances[from] = safeSub(balances[from], tokens);
allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
balances[to] = safeAdd(balances[to], tokens);
emit Transfer(from, to, tokens);
return true;
}
function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
return allowed[tokenOwner][spender];
}
function pay (uint256 _token,uint256 _amount) public payable {
uint256 amount =safeDiv(_token,tokenExchangeRate);
if(amount == _amount){
for (uint i=0; i < presale_array.length; i++){
if (now >= presale_array[i].startDate && now <=presale_array[i].endDate) {
uint256 discounted_pretoken = _token + _token * presale_array[i].discount / 100;
if(_token <= presale_array[i].pretoken){
presale_array[i].pretoken -= discounted_pretoken;
balances[msg.sender] = safeAdd(balances[msg.sender], discounted_pretoken);
return;
}
else{
revert();
}
}
}
if(now >= crowdsale_obj.crowd_startdate && now <= crowdsale_obj.crowd_enddate) {
require(_token < total_crowdsale_token);
balances[msg.sender] = safeAdd(balances[msg.sender], _token);
if(crowdsale_obj.softcap > 0 && _token <= crowdsale_obj.softcap){
crowdsale_obj.softcap -= _token;
}
else if(crowdsale_obj.softcap == 0 && crowdsale_obj.hardcap > 0 && _token <= crowdsale_obj.hardcap){
crowdsale_obj.hardcap -= _token;
}
else{
revert("Check available token balances");
}
}
else{
revert("Sale is not started");
}
emit Transfer(address(0), msg.sender, _token);
owner.transfer(_amount);
}
else{
revert("Enter valid amount");
}
}
}