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0x59C337EF937D0bA9Cb1cc47D4e6DeD632D22D623
 

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Transfer155833342022-09-21 17:49:11710 days ago1663782551IN
Tchain Token
0 ETH0.0016782735.45
Transfer147855322022-05-16 9:50:15838 days ago1652694615IN
Tchain Token
0 ETH0.0007736716.34230081
Transfer138415872021-12-20 10:52:07985 days ago1639997527IN
Tchain Token
0 ETH0.0011220337.11655924
Transfer134629412021-10-21 19:39:431045 days ago1634845183IN
Tchain Token
0 ETH0.0029944763.25207013
Transfer133833222021-10-09 7:56:081057 days ago1633766168IN
Tchain Token
0 ETH0.0047053290.28218565
Transfer133833102021-10-09 7:53:571057 days ago1633766037IN
Tchain Token
0 ETH0.00319004105.56772943
Transfer133832782021-10-09 7:45:541057 days ago1633765554IN
Tchain Token
0 ETH0.0025888785.63924925
Transfer127997032021-07-10 12:38:191148 days ago1625920699IN
Tchain Token
0 ETH0.0011250321.58637
Transfer127797572021-07-07 10:30:091151 days ago1625653809IN
Tchain Token
0 ETH0.0005725128.6
Transfer127797272021-07-07 10:24:051151 days ago1625653445IN
Tchain Token
0 ETH0.0017615833.8
Transfer127797212021-07-07 10:21:311151 days ago1625653291IN
Tchain Token
0 ETH0.0006509732.5
Transfer127151842021-06-27 8:58:571161 days ago1624784337IN
Tchain Token
0 ETH0.0011520722.1
Transfer126684122021-06-20 1:51:261169 days ago1624153886IN
Tchain Token
0 ETH0.0011181821.45
Transfer126128462021-06-11 10:57:061177 days ago1623409026IN
Tchain Token
0 ETH0.0011175121.437
Transfer125950662021-06-08 16:50:231180 days ago1623171023IN
Tchain Token
0 ETH0.0007486737.4
Transfer125949882021-06-08 16:33:051180 days ago1623169985IN
Tchain Token
0 ETH0.002032639
Transfer125949712021-06-08 16:30:041180 days ago1623169804IN
Tchain Token
0 ETH0.0011717558.5
Transfer125949512021-06-08 16:27:251180 days ago1623169645IN
Tchain Token
0 ETH0.0012238361.1
Transfer125776582021-06-06 0:23:301183 days ago1622939010IN
Tchain Token
0 ETH0.0002203311
Transfer125458022021-06-01 1:58:021188 days ago1622512682IN
Tchain Token
0 ETH0.0011520722.1
Transfer125354992021-05-30 11:38:081189 days ago1622374688IN
Tchain Token
0 ETH0.001124721.58
Transfer125288442021-05-29 11:00:521190 days ago1622286052IN
Tchain Token
0 ETH0.0012876124.70000189
Transfer125225202021-05-28 11:18:451191 days ago1622200725IN
Tchain Token
0 ETH0.0004847224.2
Transfer125205992021-05-28 4:13:251192 days ago1622175205IN
Tchain Token
0 ETH0.0012295535.1
Transfer125076022021-05-26 3:45:161194 days ago1622000716IN
Tchain Token
0 ETH0.0025752249.40000189
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Contract Source Code Verified (Exact Match)

Contract Name:
TCH

Compiler Version
v0.4.24+commit.e67f0147

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2018-10-29
*/

pragma solidity ^0.4.18;

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    if (a == 0) {
      return 0;
    }
    uint256 c = a * b;
    assert(c / a == b);
    return c;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  function div(uint256 a, uint256 b) internal pure 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;
  }

  /**
  * @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 a, uint256 b) internal pure 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() public {
    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) public onlyOwner {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  function totalSupply() public view returns (uint256);
  function balanceOf(address who) public view 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 view 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;

  uint256 totalSupply_;

  /**
  * @dev total number of tokens in existence
  */
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  /**
  * @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));
    require(_value <= balances[msg.sender]);

    // 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 view 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)) internal 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));
    require(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].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 view returns (uint256) {
    return allowed[_owner][_spender];
  }

  /**
   * @dev Increase the amount of tokens that an owner allowed to a 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
   * @param _spender The address which will spend the funds.
   * @param _addedValue The amount of tokens to increase the allowance by.
   */
  function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  /**
   * @dev Decrease the amount of tokens that an owner allowed to a spender.
   *
   * approve should be called when allowed[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _subtractedValue The amount of tokens to decrease the allowance by.
   */
  function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
    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;
  }

}

 
/*
Tchain
*/
contract TCH is StandardToken, Ownable {
    // Constants
    string  public constant name = "Tchain";
    string  public constant symbol = "TCH";
    uint8   public constant decimals = 18;
    uint256 public constant INITIAL_SUPPLY      = 1000000000 * (10 ** uint256(decimals));

    uint public amountRaised;
    uint256 public buyPrice = 50000;
    bool public crowdsaleClosed;

    function TCH() public {
      totalSupply_ = INITIAL_SUPPLY;
      balances[msg.sender] = INITIAL_SUPPLY;
      Transfer(0x0, msg.sender, INITIAL_SUPPLY);
    }

    function _transfer(address _from, address _to, uint _value) internal {     
        require (balances[_from] >= _value);               // Check if the sender has enough
        require (balances[_to] + _value > balances[_to]); // Check for overflows
   
        balances[_from] = balances[_from].sub(_value);                         // Subtract from the sender
        balances[_to] = balances[_to].add(_value);                            // Add the same to the recipient
         
        Transfer(_from, _to, _value);
    }

    function setPrices(bool closebuy, uint256 newBuyPrice) onlyOwner public {
        crowdsaleClosed = closebuy;
        buyPrice = newBuyPrice;
    }

    function () external payable {
        require(!crowdsaleClosed);
        uint amount = msg.value ;               // calculates the amount
        amountRaised = amountRaised.add(amount);
        _transfer(owner, msg.sender, amount.mul(buyPrice)); 
    }

    //Retrieve the ETH, set the parameter to 0, and retrieve it all, or retrieve the specified number of eth.
    function safeWithdrawal(uint _value ) onlyOwner public {
       if (_value == 0) 
           owner.transfer(address(this).balance);
       else
           owner.transfer(_value);
    }

    /* Batch token transfer. Used by contract creator to distribute initial tokens to holders */
    function batchTransfer(address[] _recipients, uint[] _values) onlyOwner public returns (bool) {
        require( _recipients.length > 0 && _recipients.length == _values.length);

        uint total = 0;
        for(uint i = 0; i < _values.length; i++){
            total = total.add(_values[i]);
        }
        require(total <= balances[msg.sender]);

        for(uint j = 0; j < _recipients.length; j++){
            balances[_recipients[j]] = balances[_recipients[j]].add(_values[j]);
            Transfer(msg.sender, _recipients[j], _values[j]);
        }

        balances[msg.sender] = balances[msg.sender].sub(total);
        return true;
    }
}

Contract Security Audit

Contract ABI

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Swarm Source

bzzr://9c7267c91fe9f1480965eff269fabeea39328bcdf974cdc3adcb7ead94a28eeb

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.