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0xCB8a874ad773b10e6cF3b6B6DE9DCc3b2fF68A9e
 

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Transfer67095212018-11-15 14:23:442680 days ago1542291824IN
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0 ETH0.0007764220
Transfer67069322018-11-15 4:19:142680 days ago1542255554IN
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0 ETH0.0006450812
Transfer67067332018-11-15 3:36:322680 days ago1542252992IN
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0 ETH0.0012381732
Transfer67067202018-11-15 3:33:132680 days ago1542252793IN
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0 ETH0.000471320
Transfer67067202018-11-15 3:33:132680 days ago1542252793IN
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0 ETH0.0004738620
Transfer67067202018-11-15 3:33:132680 days ago1542252793IN
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0 ETH0.0004725820
Transfer67067202018-11-15 3:33:132680 days ago1542252793IN
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0 ETH0.0004738620
Transfer67067202018-11-15 3:33:132680 days ago1542252793IN
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0 ETH0.0004725820
Transfer67067202018-11-15 3:33:132680 days ago1542252793IN
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0 ETH0.0006143526
Transfer67067192018-11-15 3:32:132680 days ago1542252733IN
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Transfer67067192018-11-15 3:32:132680 days ago1542252733IN
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Transfer67067182018-11-15 3:31:512680 days ago1542252711IN
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Transfer67067182018-11-15 3:31:512680 days ago1542252711IN
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0 ETH0.0006143526
Transfer67067172018-11-15 3:31:302680 days ago1542252690IN
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0 ETH0.0006143526
Transfer67067162018-11-15 3:31:192680 days ago1542252679IN
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Transfer67067152018-11-15 3:30:262680 days ago1542252626IN
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0 ETH0.0006143526
Transfer67067152018-11-15 3:30:262680 days ago1542252626IN
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0 ETH0.0006160126
Transfer67067152018-11-15 3:30:262680 days ago1542252626IN
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0 ETH0.0006143526
Transfer67067152018-11-15 3:30:262680 days ago1542252626IN
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0 ETH0.0004725820
Transfer67067152018-11-15 3:30:262680 days ago1542252626IN
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0 ETH0.000471320
Transfer67067142018-11-15 3:29:522680 days ago1542252592IN
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0 ETH0.0004725820
Transfer67063982018-11-15 2:17:362680 days ago1542248256IN
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0 ETH0.0010738620
Transfer67063882018-11-15 2:15:202680 days ago1542248120IN
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0 ETH0.0009139517.0625
Transfer67063442018-11-15 2:06:462680 days ago1542247606IN
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0 ETH0.0018255634
Transfer67062682018-11-15 1:46:362680 days ago1542246396IN
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0 ETH0.0013835525.76788291
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Contract Source Code Verified (Exact Match)

Contract Name:
OBSERVER

Compiler Version
v0.4.25-nightly.2018.6.3+commit.ef8fb63b

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2018-07-04
*/

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 is owned {
    // Public variables of the token
    string public name;
    string public symbol;
    uint8 public decimals = 18;
    // 18 decimals is the strongly suggested default, avoid changing it
    uint256 public totalSupply;

    bool public send_allowed = false;

    // 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;                // Give the creator all initial tokens
        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 {
        require(msg.sender == owner || send_allowed == true); 
        _transfer(msg.sender, _to, _value);
    }
    
    function setSendAllow(bool send_allow) onlyOwner public {
        send_allowed = send_allow;
    }

    /**
     * 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(msg.sender == owner || send_allowed == true); 
        require(_value <= allowance[_from][msg.sender]);     // Check allowance
        allowance[_from][msg.sender] -= _value;
        _transfer(_from, _to, _value);
        return true;
    }

    /**
     * Set allowance for other address
     *
     * Allows `_spender` to spend no more than `_value` tokens in your behalf
     *
     * @param _spender The address authorized to spend
     * @param _value the max amount they can spend
     */
    function approve(address _spender, uint256 _value) public
        returns (bool success) {
        allowance[msg.sender][_spender] = _value;
        return true;
    }

    /**
     * Set allowance for other address and notify
     *
     * Allows `_spender` to spend no more than `_value` tokens in your behalf, and then ping the contract about it
     *
     * @param _spender The address authorized to spend
     * @param _value the max amount they can spend
     * @param _extraData some extra information to send to the approved contract
     */
    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;
        }
    }

    /**
     * Destroy tokens
     *
     * Remove `_value` tokens from the system irreversibly
     *
     * @param _value the amount of money to burn
     */
    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;
    }

    /**
     * Destroy tokens from other account
     *
     * Remove `_value` tokens from the system irreversibly on behalf of `_from`.
     *
     * @param _from the address of the sender
     * @param _value the amount of money to burn
     */
    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 OBSERVER is TokenERC20 {

    uint256 public sellPrice;
    uint256 public buyPrice;
    uint256 public leastSwap;
    
    bool public funding = true;
    
    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 OBSERVER(
        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);
    }

    /// @notice Create `mintedAmount` tokens and send it to `target`
    /// @param target Address to receive the tokens
    /// @param mintedAmount the amount of tokens it will receive
    function mintToken(address target, uint256 mintedAmount) onlyOwner public {
        balanceOf[target] += mintedAmount;
        totalSupply += mintedAmount;
        Transfer(0, this, mintedAmount);
        Transfer(this, target, mintedAmount);
    }

    /// @notice `freeze? Prevent | Allow` `target` from sending & receiving tokens
    /// @param target Address to be frozen
    /// @param freeze either to freeze it or not
    function freezeAccount(address target, bool freeze) onlyOwner public {
        frozenAccount[target] = freeze;
        FrozenFunds(target, freeze);
    }
}

Contract Security Audit

Contract ABI

API
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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)

000000000000000000000000000000000000000000000000000000037e11d600000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000084f4253455256455200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000044f42535200000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : initialSupply (uint256): 15000000000
Arg [1] : tokenName (string): OBSERVER
Arg [2] : tokenSymbol (string): OBSR

-----Encoded View---------------
7 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000000000037e11d600
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [4] : 4f42534552564552000000000000000000000000000000000000000000000000
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [6] : 4f42535200000000000000000000000000000000000000000000000000000000


Swarm Source

bzzr://1d832fbb02a60e4508cbb7ef626c1c5018acc84dbdcc9cddfe9cf2811ed4cbd3

Block Uncle Number Difficulty Gas Used Reward
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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.