BAR ERC20代币上币指南

BAR ERC20代币简介

BAR ERC代币全称Balance Accounted Receipt,以下为代币基本信息:

智能合约地址:0x5E647E8d46f209a60227526ea6D6d26E748a2B13

总供应量:2,000,000,000 BAR

精度:18

本ERC20代币已经过代码审计,请使用标准ERC20代币对接方式进行对接。可参考以太坊官方对接指南,GitHub地址:

https://github.com/ethereum/go-ethereum/wiki/Native-DApps:-Go-bindings-to-Ethereum-contracts

合约源码:

/**
 * Source Code first verified at https://etherscan.io on Saturday, May 18, 2019
 (UTC) */

pragma solidity ^0.5;

contract owned {
    address public owner;

    constructor() 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 calldata _extraData) external; }

contract TokenERC20 {

    string public name;
    string public symbol;
    uint8 public decimals = 18;

    uint256 public totalSupply;


    mapping (address => uint256) public balanceOf;
    mapping (address => mapping (address => uint256)) public allowance;


    event Transfer(address indexed from, address indexed to, uint256 value);


    event Approval(address indexed _owner, address indexed _spender, uint256 _value);


    event Burn(address indexed from, uint256 value);

    constructor(
        uint256 initialSupply,
        string memory tokenName,
        string memory tokenSymbol
    ) public {
        totalSupply = initialSupply * 10 ** uint256(decimals);  
        balanceOf[msg.sender] = totalSupply;                    
        name = tokenName;                                       
        symbol = tokenSymbol;                                   
    }

    function _transfer(address _from, address _to, uint _value) internal {

        require(_to != address(0x0));

        require(balanceOf[_from] >= _value);

        require(balanceOf[_to] + _value > balanceOf[_to]);

        uint previousBalances = balanceOf[_from] + balanceOf[_to];

        balanceOf[_from] -= _value;

        balanceOf[_to] += _value;
        emit Transfer(_from, _to, _value);

        assert(balanceOf[_from] + balanceOf[_to] == previousBalances);
    }

    function transfer(address _to, uint256 _value) public returns (bool success) {
        _transfer(msg.sender, _to, _value);
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(_value <= allowance[_from][msg.sender]);     
        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;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

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

    function burn(uint256 _value) public returns (bool success) {
        require(balanceOf[msg.sender] >= _value);   
        balanceOf[msg.sender] -= _value;            
        totalSupply -= _value;                      
        emit Burn(msg.sender, _value);
        return true;
    }

    function burnFrom(address _from, uint256 _value) public returns (bool success) {
        require(balanceOf[_from] >= _value);                
        require(_value <= allowance[_from][msg.sender]);    
        balanceOf[_from] -= _value;                         
        allowance[_from][msg.sender] -= _value;             
        totalSupply -= _value;                              
        emit Burn(_from, _value);
        return true;
    }
}

contract BarToken is owned, TokenERC20 {

    mapping (address => bool) public frozenAccount;

    event FrozenFunds(address target, bool frozen);

    constructor(
        uint256 initialSupply,
        string memory tokenName,
        string memory tokenSymbol
    ) TokenERC20(initialSupply, tokenName, tokenSymbol) public {}

    function _transfer(address _from, address _to, uint _value) internal {
        require (_to != address(0x0));                          
        require (balanceOf[_from] >= _value);                   
        require (balanceOf[_to] + _value >= balanceOf[_to]);    
        require(!frozenAccount[_from]);                         
        require(!frozenAccount[_to]);                           
        balanceOf[_from] -= _value;                             
        balanceOf[_to] += _value;                               
        emit Transfer(_from, _to, _value);
    }

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

}

合约ABI

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