ETH Price: $3,163.58 (-7.47%)
Gas: 4 Gwei

Contract

0x3fE2eF1DFb1595195768627d16751D552586dce8
 

Overview

ETH Balance

0 ETH

Eth Value

$0.00

Token Holdings

Multichain Info

No addresses found
Transaction Hash
Method
Block
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To
0x2732d9f7401747560bd18892e3079dde819dbc30a86d355ea20f3641a2ce7116 Transfer(pending)2024-07-21 3:28:164 days ago1721532496IN
0x3fE2eF1D...52586dce8
0 ETH(Pending)(Pending)
Transfer201738982024-06-26 5:53:2329 days ago1719381203IN
0x3fE2eF1D...52586dce8
0 ETH0.000043511.46875
Approve182890712023-10-06 4:27:23293 days ago1696566443IN
0x3fE2eF1D...52586dce8
0 ETH0.000160516.14694604
Approve182890642023-10-06 4:25:59293 days ago1696566359IN
0x3fE2eF1D...52586dce8
0 ETH0.000124665.17013713
Approve169124132023-03-26 15:12:11487 days ago1679843531IN
0x3fE2eF1D...52586dce8
0 ETH0.0005886422.54218082
Approve169124072023-03-26 15:10:59487 days ago1679843459IN
0x3fE2eF1D...52586dce8
0 ETH0.00059624.71697701
Transfer165463372023-02-03 6:02:23538 days ago1675404143IN
0x3fE2eF1D...52586dce8
0 ETH0.0009618420.58427558
Approve164335242023-01-18 11:54:47554 days ago1674042887IN
0x3fE2eF1D...52586dce8
0 ETH0.0003628915.04973581
Transfer130199782021-08-14 0:03:011076 days ago1628899381IN
0x3fE2eF1D...52586dce8
0 ETH0.0016530748
Transfer113859472020-12-04 11:47:401329 days ago1607082460IN
0x3fE2eF1D...52586dce8
0 ETH0.0012934725
Transfer113532692020-11-29 11:03:231334 days ago1606647803IN
0x3fE2eF1D...52586dce8
0 ETH0.0004777613
Transfer112368552020-11-11 14:27:421352 days ago1605104862IN
0x3fE2eF1D...52586dce8
0 ETH0.0019104252
Transfer112091232020-11-07 8:05:231356 days ago1604736323IN
0x3fE2eF1D...52586dce8
0 ETH0.00624621170.016
Transfer111946302020-11-05 3:00:201358 days ago1604545220IN
0x3fE2eF1D...52586dce8
0 ETH0.0010654329
Approve109377662020-09-26 10:42:391398 days ago1601116959IN
0x3fE2eF1D...52586dce8
0 ETH0.0025085157
Transfer109377602020-09-26 10:42:011398 days ago1601116921IN
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0 ETH0.0013848660
Transfer107420532020-08-27 10:27:481428 days ago1598524068IN
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0 ETH0.003368265.1
Transfer107323112020-08-25 22:27:531429 days ago1598394473IN
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0 ETH0.0024247766
Transfer106927372020-08-19 20:38:241435 days ago1597869504IN
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0 ETH0.00407802111
Transfer106926272020-08-19 20:12:311435 days ago1597867951IN
0x3fE2eF1D...52586dce8
0 ETH0.056395511,090
Transfer106058452020-08-06 11:02:041449 days ago1596711724IN
0x3fE2eF1D...52586dce8
0 ETH0.0014328239
Transfer105866872020-08-03 12:03:521452 days ago1596456232IN
0x3fE2eF1D...52586dce8
0 ETH0.01608686740
Transfer105815182020-08-02 16:39:151453 days ago1596386355IN
0x3fE2eF1D...52586dce8
0 ETH0.0016532545
Transfer104035792020-07-06 3:56:021480 days ago1594007762IN
0x3fE2eF1D...52586dce8
0 ETH0.000954926
Transfer103677612020-06-30 14:54:021486 days ago1593528842IN
0x3fE2eF1D...52586dce8
0 ETH0.0014695640
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Contract Source Code Verified (Exact Match)

Contract Name:
OptaToken

Compiler Version
v0.4.24+commit.e67f0147

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2018-08-22
*/

pragma solidity ^0.4.4;
 
contract Token {
 
    /// @return total amount of tokens
    function totalSupply() constant returns (uint256 supply) {}
 
    /// @param _owner The address from which the balance will be retrieved
    /// @return The balance
    function balanceOf(address _owner) constant returns (uint256 balance) {}
 
    /// @notice send `_value` token to `_to` from `msg.sender`
    /// @param _to The address of the recipient
    /// @param _value The amount of token to be transferred
    /// @return Whether the transfer was successful or not
    function transfer(address _to, uint256 _value) returns (bool success) {}
 
    /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
    /// @param _from The address of the sender
    /// @param _to The address of the recipient
    /// @param _value The amount of token to be transferred
    /// @return Whether the transfer was successful or not
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}
 
    /// @notice `msg.sender` approves `_addr` to spend `_value` tokens
    /// @param _spender The address of the account able to transfer the tokens
    /// @param _value The amount of wei to be approved for transfer
    /// @return Whether the approval was successful or not
    function approve(address _spender, uint256 _value) returns (bool success) {}
 
    /// @param _owner The address of the account owning tokens
    /// @param _spender The address of the account able to transfer the tokens
    /// @return Amount of remaining tokens allowed to spent
    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}
 
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
     
}
 
 
 
contract StandardToken is Token {
 
    function transfer(address _to, uint256 _value) returns (bool success) {
        //Default assumes totalSupply can't be over max (2^256 - 1).
        //If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
        //Replace the if with this one instead.
        //if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
        if (balances[msg.sender] >= _value && _value > 0) {
            balances[msg.sender] -= _value;
            balances[_to] += _value;
            Transfer(msg.sender, _to, _value);
            return true;
        } else { return false; }
    }
 
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
        //same as above. Replace this line with the following if you want to protect against wrapping uints.
        //if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
        if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
            balances[_to] += _value;
            balances[_from] -= _value;
            allowed[_from][msg.sender] -= _value;
            Transfer(_from, _to, _value);
            return true;
        } else { return false; }
    }
 
    function balanceOf(address _owner) constant returns (uint256 balance) {
        return balances[_owner];
    }
 
    function approve(address _spender, uint256 _value) returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }
 
    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
      return allowed[_owner][_spender];
    }
 
    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
    uint256 public totalSupply;
}
 
 
//name this contract whatever you'd like
contract OptaToken is StandardToken {
 
    function () {
        //if ether is sent to this address, send it back.
        throw;
    }
 
    /* Public variables of the token */
 
    /*
    NOTE:
    The following variables are OPTIONAL vanities. One does not have to include them.
    They allow one to customise the token contract & in no way influences the core functionality.
    Some wallets/interfaces might not even bother to look at this information.
    */
    string public name;                   //fancy name: eg Simon Bucks
    uint8 public decimals;                //How many decimals to show. ie. There could 1000 base units with 3 decimals. Meaning 0.980 SBX = 980 base units. It's like comparing 1 wei to 1 ether.
    string public symbol;                 //An identifier: eg SBX
    string public version = 'H1.0';       //human 0.1 standard. Just an arbitrary versioning scheme.
 
//
// CHANGE THESE VALUES FOR YOUR TOKEN
//
 
//make sure this function name matches the contract name above. So if you're token is called TutorialToken, make sure the //contract name above is also TutorialToken instead of ERC20Token
 
    function OptaToken(
        ) {
        balances[msg.sender] = 100000000000000000;               // Give the creator all initial tokens (100000 for example)
        totalSupply = 100000000000000000;                        // Update total supply (100000 for example)
        name = "Opta Token";                                   // Set the name for display purposes
        decimals = 10;                            // Amount of decimals for display purposes
        symbol = "OPA";                               // Set the symbol for display purposes
    }
 
    /* Approves and then calls the receiving contract */
    function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
 
        //call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
        //receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
        //it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
        if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
        return true;
    }
}

Contract Security Audit

Contract ABI

[{"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":true,"inputs":[],"name":"version","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","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":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"},{"name":"_extraData","type":"bytes"}],"name":"approveAndCall","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","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":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Approval","type":"event"}]

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Deployed Bytecode

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Swarm Source

bzzr://8955b8b8691c20c5cd094495c8b5705abd5405beacad82a46a098a3baf7898e8

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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.