Token

Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

 contract SafeMath    - function safeMul(uint256 a, uint256 b ...    - function safeDiv(uint256 a, uint256 b ...    - function safeSub(uint256 a, uint256 b ...    - function safeAdd(uint256 a, uint256 b ...    - function assert(bool assertion)  contract CooToken is SafeMath *    - function CooToken()    - function transfer(address _to, uint25 ...    - function approve(address _spender, ui ...    - function transferFrom(address _from, ...    - function burn(uint256 _value)    - function freeze(uint256 _value)    - function unfreeze(uint256 _value)

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2018-10-20
*/

pragma solidity ^0.4.8;

/**
 * Math operations with safety checks
 */
contract SafeMath {
  function safeMul(uint256 a, uint256 b) internal returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function safeDiv(uint256 a, uint256 b) internal returns (uint256) {
    assert(b > 0);
    uint256 c = a / b;
    assert(a == b * c + a % b);
    return c;
  }

  function safeSub(uint256 a, uint256 b) internal returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function safeAdd(uint256 a, uint256 b) internal returns (uint256) {
    uint256 c = a + b;
    assert(c>=a && c>=b);
    return c;
  }

  function assert(bool assertion) internal {
    if (!assertion) {
      revert();
    }
  }
}

contract CooToken is SafeMath {
    string public name;
    string public symbol;
    uint8 public decimals;
    uint256 public totalSupply;

    /* This creates an array with all balances */
    mapping (address => uint256) public balanceOf;
    mapping (address => uint256) public freezeOf;
    mapping (address => mapping (address => uint256)) public allowance;

    /* This generates a public event on the blockchain that will notify clients */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /* This notifies clients about the amount burnt */
    event Burn(address indexed from, uint256 value);

    /* This notifies clients about the amount frozen */
    event Freeze(address indexed from, uint256 value);

    /* This notifies clients about the amount unfrozen */
    event Unfreeze(address indexed from, uint256 value);

    /* Initializes contract with initial supply tokens to the creator of the contract */
    function CooToken() {
        balanceOf[msg.sender] = 10084800000000000;       // Give the creator all initial tokens
        totalSupply = 10084800000000000;                 // Update total supply
        name = 'CooCoin';                          // Set the name for display purposes
        symbol = 'Coo';                          // Set the symbol for display purposes
        decimals = 8;                            // Amount of decimals for display purposes
    }

    /* Send tokens */
    function transfer(address _to, uint256 _value) {
        if (_to == 0x0) revert();                               // Prevent transfer to 0x0 address. Use burn() instead
        if (_value <= 0) revert();
        if (balanceOf[msg.sender] < _value) revert();           // Check if the sender has enough
        if (balanceOf[_to] + _value < balanceOf[_to]) revert(); // Check for overflows
        balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);              // Subtract from the sender
        balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);                            // Add the same to the recipient
        Transfer(msg.sender, _to, _value);                      // Notify anyone listening that this transfer took place
    }

    /* Allow another contract to spend some tokens in your behalf */
    function approve(address _spender, uint256 _value) returns (bool success) {
    if (_value <= 0) revert();
        allowance[msg.sender][_spender] = _value;
        return true;
    }

    /* Transfer tokens */
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
        if (_to == 0x0) revert();                                // Prevent transfer to 0x0 address. Use burn() instead
        if (_value <= 0) revert();
        if (balanceOf[_from] < _value) revert();                 // Check if the sender has enough
        if (balanceOf[_to] + _value < balanceOf[_to]) revert();  // Check for overflows
        if (_value > allowance[_from][msg.sender]) revert();     // Check allowance
        balanceOf[_from] = SafeMath.safeSub(balanceOf[_from], _value);                         // Subtract from the sender
        balanceOf[_to] = SafeMath.safeAdd(balanceOf[_to], _value);                             // Add the same to the recipient
        allowance[_from][msg.sender] = SafeMath.safeSub(allowance[_from][msg.sender], _value);
        Transfer(_from, _to, _value);
        return true;
    }

    /* Destruction of the token */
    function burn(uint256 _value) returns (bool success) {
        if (balanceOf[msg.sender] < _value) revert();            // Check if the sender has enough
        if (_value <= 0) revert();
        balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);           // Subtract from the sender
        totalSupply = SafeMath.safeSub(totalSupply,_value);                                // Updates totalSupply
        Burn(msg.sender, _value);
        return true;
    }

    function freeze(uint256 _value) returns (bool success) {
        if (balanceOf[msg.sender] < _value) revert();            // Check if the sender has enough
        if (_value <= 0) revert();
        balanceOf[msg.sender] = SafeMath.safeSub(balanceOf[msg.sender], _value);             // Subtract from the sender
        freezeOf[msg.sender] = SafeMath.safeAdd(freezeOf[msg.sender], _value);               // Updates frozen tokens
        Freeze(msg.sender, _value);
        return true;
    }

    function unfreeze(uint256 _value) returns (bool success) {
        if (freezeOf[msg.sender] < _value) revert();            // Check if the sender has enough
        if (_value <= 0) revert();
        freezeOf[msg.sender] = SafeMath.safeSub(freezeOf[msg.sender], _value);              // Updates frozen tokens
        balanceOf[msg.sender] = SafeMath.safeAdd(balanceOf[msg.sender], _value);            // Add to the sender
        Unfreeze(msg.sender, _value);
        return true;
    }

    /* Prevents accidental sending of Ether */
    function () {
        revert();
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"burn","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"unfreeze","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"freezeOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"freeze","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":false,"stateMutability":"nonpayable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Freeze","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Unfreeze","type":"event"}]

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

bzzr://ba0f845d4b0651fa90e0c1d3f69e2643848fcde632bfe4ae09f90fe1ec928391