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 contract IMigrationContract    - function migrate(address addr, uint25 ...  contract SafeMath    - function safeAdd(uint256 x, uint256 y ...    - function safeSubtract(uint256 x, uint ...    - function safeMult(uint256 x, uint256 ...  contract Token    - function balanceOf(address _owner)    - function transfer(address _to, uint25 ...    - function transferFrom(address _from, ...    - function approve(address _spender, ui ...    - function allowance(address _owner, ad ...  contract StandardToken is Token    - function transfer(address _to, uint25 ...    - function transferFrom(address _from, ...    - function balanceOf(address _owner)    - function approve(address _spender, ui ...    - function allowance(address _owner, ad ...  contract YCOToken is StandardToken ... *    - function formatDecimals(uint256 _valu ...    - function setTokenExchangeRate(uint256 ...    - function increaseSupply (uint256 _val ...    - function decreaseSupply (uint256 _val ...    - function startFunding (uint256 _fundi ...    - function stopFunding()    - function setMigrateContract(address _ ...    - function changeOwner(address _newFund ...    - function migrate()    - function transferETH()    - function allocateToken (address _addr ...    - function ()

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/**
 *Submitted for verification at Etherscan.io on 2019-07-08
*/

pragma solidity ^0.4.24;

contract IMigrationContract {
    function migrate(address addr, uint256 nas) public returns (bool success);
}

/* 灵感来自于NAS  coin*/
contract SafeMath {
    function safeAdd(uint256 x, uint256 y) internal pure returns(uint256) {
        uint256 z = x + y;
        assert((z >= x) && (z >= y));
        return z;
    }

    function safeSubtract(uint256 x, uint256 y) internal pure returns(uint256) {
        assert(x >= y);
        uint256 z = x - y;
        return z;
    }

    function safeMult(uint256 x, uint256 y) internal pure returns(uint256) {
        uint256 z = x * y;
        assert((x == 0)||(z/x == y));
        return z;
    }

}

contract Token {
    uint256 public totalSupply;
    function balanceOf(address _owner) public constant returns (uint256 balance);
    function transfer(address _to, uint256 _value) public returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
    function approve(address _spender, uint256 _value) public returns (bool success);
    function allowance(address _owner, address _spender) public constant returns (uint256 remaining);
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}


/*  ERC 20 token */
contract StandardToken is Token {

    function transfer(address _to, uint256 _value) public returns (bool success) {
        if (balances[msg.sender] >= _value && _value > 0) {
            balances[msg.sender] -= _value;
            balances[_to] += _value;
            emit Transfer(msg.sender, _to, _value);
            return true;
        } else {
            return false;
        }
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
            balances[_to] += _value;
            balances[_from] -= _value;
            allowed[_from][msg.sender] -= _value;
            emit Transfer(_from, _to, _value);
            return true;
        } else {
            return false;
        }
    }

    function balanceOf(address _owner) public constant returns (uint256 balance) {
        return balances[_owner];
    }

    function approve(address _spender, uint256 _value) public returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
        return allowed[_owner][_spender];
    }

    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
}

contract YCOToken is StandardToken, SafeMath {
    
    // metadata
    string  public constant name = "Yi Cloud";
    string  public constant symbol = "YCO";
    uint256 public constant decimals = 18;
    string  public version = "1.0";

    // contracts
    address public ethFundDeposit;          // ETH存放地址
    address public newContractAddr;         // token更新地址

    // crowdsale parameters
    bool    public isFunding;                // 状态切换到true
    uint256 public fundingStartBlock;
    uint256 public fundingStopBlock;

    uint256 public currentSupply;           // 正在售卖中的tokens数量
    uint256 public tokenRaised = 0;         // 总的售卖数量token
    uint256 public tokenMigrated = 0;     // 总的已经交易的 token
    uint256 public tokenExchangeRate = 300;             // 代币兑换比例 N代币 兑换 1 ETH

    // events
    event AllocateToken(address indexed _to, uint256 _value);   // allocate token for private sale;
    event IssueToken(address indexed _to, uint256 _value);      // issue token for public sale;
    event IncreaseSupply(uint256 _value);
    event DecreaseSupply(uint256 _value);
    event Migrate(address indexed _to, uint256 _value);

    // 转换
    function formatDecimals(uint256 _value) internal pure returns (uint256 ) {
        return _value * 10 ** decimals;
    }

    // constructor
    constructor(
        address _ethFundDeposit,
        uint256 _currentSupply) public
    {
        ethFundDeposit = _ethFundDeposit;

        isFunding = false;                           //通过控制预CrowdS ale状态
        fundingStartBlock = 0;
        fundingStopBlock = 0;

        currentSupply = formatDecimals(_currentSupply);
        totalSupply = formatDecimals(2000000000);
        balances[msg.sender] = totalSupply;
        require(currentSupply <= totalSupply);
    }

    modifier isOwner()  { require(msg.sender == ethFundDeposit); _; }

    ///  设置token汇率
    function setTokenExchangeRate(uint256 _tokenExchangeRate) isOwner external {
        require(_tokenExchangeRate != 0);
        require(_tokenExchangeRate != tokenExchangeRate);

        tokenExchangeRate = _tokenExchangeRate;
    }

    ///增发代币
    function increaseSupply (uint256 _value) isOwner external {
        uint256 value = formatDecimals(_value);
        require(value + currentSupply <= totalSupply);
        currentSupply = safeAdd(currentSupply, value);
        emit IncreaseSupply(value);
    }

    ///减少代币
    function decreaseSupply (uint256 _value) isOwner external {
        uint256 value = formatDecimals(_value);
        require(value + tokenRaised <= currentSupply);

        currentSupply = safeSubtract(currentSupply, value);
        emit DecreaseSupply(value);
    }

    ///开启
    function startFunding (uint256 _fundingStartBlock, uint256 _fundingStopBlock) isOwner external {
        require(!isFunding);
        require(_fundingStartBlock < _fundingStopBlock);
        require(block.number < _fundingStartBlock);

        fundingStartBlock = _fundingStartBlock;
        fundingStopBlock = _fundingStopBlock;
        isFunding = true;
    }

    ///关闭
    function stopFunding() isOwner external {
        require(isFunding);
        isFunding = false;
    }

    ///set a new contract for recieve the tokens (for update contract)
    function setMigrateContract(address _newContractAddr) isOwner external {
        require(_newContractAddr != newContractAddr);
        newContractAddr = _newContractAddr;
    }

    ///set a new owner.
    function changeOwner(address _newFundDeposit) isOwner() external {
        require(_newFundDeposit != address(0x0));
        ethFundDeposit = _newFundDeposit;
    }

    ///sends the tokens to new contract
    function migrate() external {
        require(!isFunding);
        require(newContractAddr != address(0x0));

        uint256 tokens = balances[msg.sender];
        require(tokens != 0);

        balances[msg.sender] = 0;
        tokenMigrated = safeAdd(tokenMigrated, tokens);

        IMigrationContract newContract = IMigrationContract(newContractAddr);
        require(newContract.migrate(msg.sender, tokens));

        emit Migrate(msg.sender, tokens);               // log it
    }

    /// 转账ETH 到团队
    function transferETH() isOwner external {
        require(address(this).balance != 0);
        require(ethFundDeposit.send(address(this).balance));
    }

    ///  将token分配到预处理地址。
    function allocateToken (address _addr, uint256 _eth) isOwner external {
        require(_eth != 0);
        require(_addr != address(0x0));

        uint256 tokens = safeMult(formatDecimals(_eth), tokenExchangeRate);
        require(tokens + tokenRaised <= currentSupply);

        tokenRaised = safeAdd(tokenRaised, tokens);
        balances[_addr] += tokens;

        emit AllocateToken(_addr, tokens);  // 记录token日志
    }

    /// 购买token 
    function () public payable {
        require(isFunding);
        require(msg.value != 0);

        require(block.number >= fundingStartBlock);
        require(block.number <= fundingStopBlock);

        uint256 tokens = safeMult(msg.value, tokenExchangeRate);
        require(tokens + tokenRaised <= currentSupply);

        tokenRaised = safeAdd(tokenRaised, tokens);
        balances[msg.sender] += tokens;

        emit IssueToken(msg.sender, tokens);  //记录日志
    }
}

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000000000000000000000000d2fd49f24bae6cec8c68eeb3965d253436de19d10000000000000000000000000000000000000000000000000000000077359400

-----Decoded View---------------
Arg [0] : _ethFundDeposit (address): 0xD2fd49f24BaE6cec8c68Eeb3965D253436dE19d1
Arg [1] : _currentSupply (uint256): 2000000000

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000d2fd49f24bae6cec8c68eeb3965d253436de19d1
Arg [1] : 0000000000000000000000000000000000000000000000000000000077359400

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