ETH Price: $3,259.63 (+0.32%)
Gas: 1 Gwei

Contract

0xf091Cf09c51811819DB705710e9634B8bf18F164
 
Transaction Hash
Method
Block
From
To
Approve197589252024-04-29 5:36:5990 days ago1714369019IN
0xf091Cf09...8bf18F164
0 ETH0.000397498.96966086
Transfer197584732024-04-29 4:05:5990 days ago1714363559IN
0xf091Cf09...8bf18F164
0 ETH0.000297315.25285584
Transfer196467712024-04-13 12:52:35106 days ago1713012755IN
0xf091Cf09...8bf18F164
0 ETH0.0005283510.20466423
Transfer176502822023-07-08 16:37:59386 days ago1688834279IN
0xf091Cf09...8bf18F164
0 ETH0.0006937620
Transfer176388702023-07-07 2:10:11387 days ago1688695811IN
0xf091Cf09...8bf18F164
0 ETH0.00069420
Transfer176388702023-07-07 2:10:11387 days ago1688695811IN
0xf091Cf09...8bf18F164
0 ETH0.0006942420
Transfer176364342023-07-06 17:58:23388 days ago1688666303IN
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0 ETH0.0006937620
Transfer176363642023-07-06 17:43:59388 days ago1688665439IN
0xf091Cf09...8bf18F164
0 ETH0.0006937620
Transfer176363642023-07-06 17:43:59388 days ago1688665439IN
0xf091Cf09...8bf18F164
0 ETH0.00069420
Transfer176363642023-07-06 17:43:59388 days ago1688665439IN
0xf091Cf09...8bf18F164
0 ETH0.00069420
Transfer176363642023-07-06 17:43:59388 days ago1688665439IN
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0 ETH0.0006942420
Transfer176363642023-07-06 17:43:59388 days ago1688665439IN
0xf091Cf09...8bf18F164
0 ETH0.00069420
Transfer176363642023-07-06 17:43:59388 days ago1688665439IN
0xf091Cf09...8bf18F164
0 ETH0.00069420
Transfer176363642023-07-06 17:43:59388 days ago1688665439IN
0xf091Cf09...8bf18F164
0 ETH0.00069420
Transfer176363642023-07-06 17:43:59388 days ago1688665439IN
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0 ETH0.00069420
Transfer176344202023-07-06 11:09:47388 days ago1688641787IN
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0 ETH0.00103620
Approve166576652023-02-18 19:43:23526 days ago1676749403IN
0xf091Cf09...8bf18F164
0 ETH0.0009781521.93621302
Transfer163659092023-01-09 1:19:35566 days ago1673227175IN
0xf091Cf09...8bf18F164
0 ETH0.0010473520.21920639
Approve160283472022-11-22 21:52:59614 days ago1669153979IN
0xf091Cf09...8bf18F164
0 ETH0.0005390412.088544
Approve160283162022-11-22 21:46:47614 days ago1669153607IN
0xf091Cf09...8bf18F164
0 ETH0.0005914813.26476189
Approve159925572022-11-17 21:55:11619 days ago1668722111IN
0xf091Cf09...8bf18F164
0 ETH0.0005709112.80330908
Approve159925412022-11-17 21:51:59619 days ago1668721919IN
0xf091Cf09...8bf18F164
0 ETH0.0007060115.83323097
Transfer159925332022-11-17 21:50:23619 days ago1668721823IN
0xf091Cf09...8bf18F164
0 ETH0.0008222814.5249
Transfer155455162022-09-16 10:14:23681 days ago1663323263IN
0xf091Cf09...8bf18F164
0 ETH0.000318716.15419206
Transfer155331832022-09-14 13:30:19683 days ago1663162219IN
0xf091Cf09...8bf18F164
0 ETH0.0009207816.27173094
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Contract Source Code Verified (Exact Match)

Contract Name:
Couchain

Compiler Version
v0.4.24+commit.e67f0147

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2018-05-22
*/

pragma solidity ^0.4.16;

contract owned {
    address public owner;

    function owned() public {
        owner = msg.sender;
    }

    modifier onlyOwner {
        require(msg.sender == owner);
        _;
    }

    function transferOwnership(address newOwner) onlyOwner public {
        owner = newOwner;
    }
}

interface tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData) public; }

contract TokenERC20 {
    // Public variables of the token
    string public name;
    string public symbol;
    uint8 public decimals = 18;
    uint256 public totalSupply;

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

    /**
     * Constrctor function
     *
     * Initializes contract with initial supply tokens to the creator of the contract
     */
    function TokenERC20(
        uint256 initialSupply,
        string tokenName,
        string tokenSymbol
    ) public {
        totalSupply = initialSupply * 10 ** uint256(decimals);  // Update total supply with the decimal amount
        balanceOf[msg.sender] = totalSupply;              
        name = tokenName;                                   // Set the name for display purposes
        symbol = tokenSymbol;                               // Set the symbol for display purposes
    }

    /**
     * Internal transfer, only can be called by this contract
     */
    function _transfer(address _from, address _to, uint _value) internal {
        // Prevent transfer to 0x0 address. Use burn() instead
        require(_to != 0x0);
        // Check if the sender has enough
        require(balanceOf[_from] >= _value);
        // Check for overflows
        require(balanceOf[_to] + _value > balanceOf[_to]);
        // Save this for an assertion in the future
        uint previousBalances = balanceOf[_from] + balanceOf[_to];
        // Subtract from the sender
        balanceOf[_from] -= _value;
        // Add the same to the recipient
        balanceOf[_to] += _value;
        Transfer(_from, _to, _value);
        // Asserts are used to use static analysis to find bugs in your code. They should never fail
        assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
    }

    /**
     * Transfer tokens
     *
     * Send `_value` tokens to `_to` from your account
     *
     * @param _to The address of the recipient
     * @param _value the amount to send
     */
    function transfer(address _to, uint256 _value) public {
        _transfer(msg.sender, _to, _value);
    }

    /**
     * Transfer tokens from other address
     *
     * Send `_value` tokens to `_to` in behalf of `_from`
     *
     * @param _from The address of the sender
     * @param _to The address of the recipient
     * @param _value the amount to send
     */
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(_value <= allowance[_from][msg.sender]);     // Check allowance
        allowance[_from][msg.sender] -= _value;
        _transfer(_from, _to, _value);
        return true;
    }


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


    function approveAndCall(address _spender, uint256 _value, bytes _extraData)
        public
        returns (bool success) {
        tokenRecipient spender = tokenRecipient(_spender);
        if (approve(_spender, _value)) {
            spender.receiveApproval(msg.sender, _value, this, _extraData);
            return true;
        }
    }

    function burn(uint256 _value) public returns (bool success) {
        require(balanceOf[msg.sender] >= _value);   // Check if the sender has enough
        balanceOf[msg.sender] -= _value;            // Subtract from the sender
        totalSupply -= _value;                      // Updates totalSupply
        Burn(msg.sender, _value);
        return true;
    }


    function burnFrom(address _from, uint256 _value) public returns (bool success) {
        require(balanceOf[_from] >= _value);                // Check if the targeted balance is enough
        require(_value <= allowance[_from][msg.sender]);    // Check allowance
        balanceOf[_from] -= _value;                         // Subtract from the targeted balance
        allowance[_from][msg.sender] -= _value;             // Subtract from the sender's allowance
        totalSupply -= _value;                              // Update totalSupply
        Burn(_from, _value);
        return true;
    }
}


contract Couchain is owned, TokenERC20 {

    uint256 public sellPrice;
    uint256 public buyPrice;

    mapping (address => bool) public frozenAccount;

    /* This generates a public event on the blockchain that will notify clients */
    event FrozenFunds(address target, bool frozen);

    /* Initializes contract with initial supply tokens to the creator of the contract */
    function Couchain(
        uint256 initialSupply,
        string tokenName,
        string tokenSymbol
    ) TokenERC20(initialSupply, tokenName, tokenSymbol) public {}

    /* Internal transfer, only can be called by this contract */
    function _transfer(address _from, address _to, uint _value) internal {
        require (_to != 0x0);                               // Prevent transfer to 0x0 address. Use burn() instead
        require (balanceOf[_from] >= _value);               // Check if the sender has enough
        require (balanceOf[_to] + _value > balanceOf[_to]); // Check for overflows
        require(!frozenAccount[_from]);                     // Check if sender is frozen
        require(!frozenAccount[_to]);                       // Check if recipient is frozen
        balanceOf[_from] -= _value;                         // Subtract from the sender
        balanceOf[_to] += _value;                           // Add the same to the recipient
        Transfer(_from, _to, _value);
    }

    function freezeAccount(address target, bool freeze) onlyOwner public {
        frozenAccount[target] = freeze;
        FrozenFunds(target, freeze);
    }

    /// @notice Allow users to buy tokens for `newBuyPrice` eth and sell tokens for `newSellPrice` eth
    /// @param newSellPrice Price the users can sell to the contract
    /// @param newBuyPrice Price users can buy from the contract
    function setPrices(uint256 newSellPrice, uint256 newBuyPrice) onlyOwner public {
        sellPrice = newSellPrice;
        buyPrice = newBuyPrice;
    }

    /// @notice Buy tokens from contract by sending ether
    function buy() payable public {
        uint amount = msg.value / buyPrice;               // calculates the amount
        _transfer(this, msg.sender, amount);              // makes the transfers
    }

    /// @notice Sell `amount` tokens to contract
    /// @param amount amount of tokens to be sold
    function sell(uint256 amount) public {
        require(this.balance >= amount * sellPrice);      // checks if the contract has enough ether to buy
        _transfer(msg.sender, this, amount);              // makes the transfers
        msg.sender.transfer(amount * sellPrice);          // sends ether to the seller. It's important to do this last to avoid recursion attacks
    }
}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000000000000000000000000000000000000737be7600000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000008436f75636861696e0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000003434f550000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : initialSupply (uint256): 31000000000
Arg [1] : tokenName (string): Couchain
Arg [2] : tokenSymbol (string): COU

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000737be7600
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [4] : 436f75636861696e000000000000000000000000000000000000000000000000
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [6] : 434f550000000000000000000000000000000000000000000000000000000000


Swarm Source

bzzr://bb74b201ebdee836273c9dc17322e330bb1d425caa1d58b12bb2e13bfd03fa90

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