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Transfer239080062025-11-30 0:49:3567 days ago1764463775IN
Traceability Chain Coin: TAC Token
0 ETH0.000001590.03412415
Transfer226017342025-05-31 9:11:59250 days ago1748682719IN
Traceability Chain Coin: TAC Token
0 ETH0.000034160.7320163
Transfer212228022024-11-19 15:53:59443 days ago1732031639IN
Traceability Chain Coin: TAC Token
0 ETH0.0013007227.87973269
Approve211990812024-11-16 8:32:11446 days ago1731745931IN
Traceability Chain Coin: TAC Token
0 ETH0.0003130212.99953706
Transfer204534302024-08-04 6:35:23550 days ago1722753323IN
Traceability Chain Coin: TAC Token
0 ETH0.000046641
Approve204533282024-08-04 6:14:47550 days ago1722752087IN
Traceability Chain Coin: TAC Token
0 ETH0.000046361
Transfer204087072024-07-29 0:42:23556 days ago1722213743IN
Traceability Chain Coin: TAC Token
0 ETH0.000051441
Transfer197951532024-05-04 7:09:11642 days ago1714806551IN
Traceability Chain Coin: TAC Token
0 ETH0.000286155.56249979
Transfer197951142024-05-04 7:01:23642 days ago1714806083IN
Traceability Chain Coin: TAC Token
0 ETH0.0002926.25889547
Approve196514392024-04-14 4:37:23662 days ago1713069443IN
Traceability Chain Coin: TAC Token
0 ETH0.000526511.36462128
Approve195579892024-04-01 2:20:59675 days ago1711938059IN
Traceability Chain Coin: TAC Token
0 ETH0.0007749616.72768312
Transfer194920232024-03-22 18:43:11685 days ago1711132991IN
Traceability Chain Coin: TAC Token
0 ETH0.0010561122.6367397
Transfer193476642024-03-02 13:04:59705 days ago1709384699IN
Traceability Chain Coin: TAC Token
0 ETH0.0025327454.28661504
Approve193048982024-02-25 13:28:47711 days ago1708867727IN
Traceability Chain Coin: TAC Token
0 ETH0.0016052634.65
Transfer192849842024-02-22 18:39:23714 days ago1708627163IN
Traceability Chain Coin: TAC Token
0 ETH0.0027539759.02847254
Approve186404772023-11-24 8:49:11804 days ago1700815751IN
Traceability Chain Coin: TAC Token
0 ETH0.0007078626.78454227
Approve186404742023-11-24 8:48:35804 days ago1700815715IN
Traceability Chain Coin: TAC Token
0 ETH0.0012856327.75072515
Transfer174090202023-06-04 18:30:35977 days ago1685903435IN
Traceability Chain Coin: TAC Token
0 ETH0.0010284722.05
Approve168870662023-03-23 1:44:351050 days ago1679535875IN
Traceability Chain Coin: TAC Token
0 ETH0.0002956612.27829258
Transfer161828662022-12-14 12:14:471149 days ago1671020087IN
Traceability Chain Coin: TAC Token
0 ETH0.0007344814.26773264
Transfer161827472022-12-14 11:50:591149 days ago1671018659IN
Traceability Chain Coin: TAC Token
0 ETH0.0003790912.81106555
Approve155739122022-09-20 9:50:351234 days ago1663667435IN
Traceability Chain Coin: TAC Token
0 ETH0.000193934.18285881
Approve154916522022-09-07 17:36:221247 days ago1662572182IN
Traceability Chain Coin: TAC Token
0 ETH0.0007632116.46142958
Approve154169322022-08-26 18:31:431259 days ago1661538703IN
Traceability Chain Coin: TAC Token
0 ETH0.0010222
Approve152631372022-08-02 12:33:541283 days ago1659443634IN
Traceability Chain Coin: TAC Token
0 ETH0.000338487.30070026
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x0B0220c0...b884cd51F
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
HumanStandardToken

Compiler Version
v0.4.19+commit.c4cbbb05

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2018-01-09
*/

pragma solidity ^0.4.8;
contract Token{
    // token总量,默认会为public变量生成一个getter函数接口,名称为totalSupply().
    uint256 public totalSupply;

    /// 获取账户_owner拥有token的数量 
    function balanceOf(address _owner) constant returns (uint256 balance);

    //从消息发送者账户中往_to账户转数量为_value的token
    function transfer(address _to, uint256 _value) returns (bool success);

    //从账户_from中往账户_to转数量为_value的token,与approve方法配合使用
    function transferFrom(address _from, address _to, uint256 _value) returns   
    (bool success);

    //消息发送账户设置账户_spender能从发送账户中转出数量为_value的token
    function approve(address _spender, uint256 _value) returns (bool success);

    //获取账户_spender可以从账户_owner中转出token的数量
    function allowance(address _owner, address _spender) constant returns 
    (uint256 remaining);

    //发生转账时必须要触发的事件 
    event Transfer(address indexed _from, address indexed _to, uint256 _value);

    //当函数approve(address _spender, uint256 _value)成功执行时必须触发的事件
    event Approval(address indexed _owner, address indexed _spender, uint256 
    _value);
}

contract StandardToken is Token {
    function transfer(address _to, uint256 _value) returns (bool success) {
        //默认totalSupply 不会超过最大值 (2^256 - 1).
        //如果随着时间的推移将会有新的token生成,则可以用下面这句避免溢出的异常
        //require(balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]);
        require(balances[msg.sender] >= _value);
        balances[msg.sender] -= _value;//从消息发送者账户中减去token数量_value
        balances[_to] += _value;//往接收账户增加token数量_value
        Transfer(msg.sender, _to, _value);//触发转币交易事件
        return true;
    }


    function transferFrom(address _from, address _to, uint256 _value) returns 
    (bool success) {
        //require(balances[_from] >= _value && allowed[_from][msg.sender] >= 
        // _value && balances[_to] + _value > balances[_to]);
        require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value);
        balances[_to] += _value;//接收账户增加token数量_value
        balances[_from] -= _value; //支出账户_from减去token数量_value
        allowed[_from][msg.sender] -= _value;//消息发送者可以从账户_from中转出的数量减少_value
        Transfer(_from, _to, _value);//触发转币交易事件
        return true;
    }
    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];//允许_spender从_owner中转出的token数
    }
    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
}

contract HumanStandardToken is StandardToken { 

    /* Public variables of the token */
    string public name;                   //名称: eg Simon Bucks
    uint8 public decimals;               //最多的小数位数,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;               //token简称: eg SBX
    string public version = 'H0.1';    //版本

    function HumanStandardToken(uint256 _initialAmount, string _tokenName, uint8 _decimalUnits, string _tokenSymbol) {
        balances[msg.sender] = _initialAmount; // 初始token数量给予消息发送者
        totalSupply = _initialAmount;         // 设置初始总量
        name = _tokenName;                   // token名称
        decimals = _decimalUnits;           // 小数位数
        symbol = _tokenSymbol;             // token简称
    }

    /* 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.
        require(_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData));
        return true;
    }

}

Contract Security Audit

Contract ABI

API
[{"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":[{"name":"_initialAmount","type":"uint256"},{"name":"_tokenName","type":"string"},{"name":"_decimalUnits","type":"uint8"},{"name":"_tokenSymbol","type":"string"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"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://156b95c62486aa2e4ea7bf90d0d5be08a247cb75a3c66161b53425097c18599f

Block Uncle Number Difficulty Gas Used Reward
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OVERVIEW

Traceability Chain (referred to as TAC for short) is traceability public chain erected through blockchain technology

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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.