与智能合约交互(3):传统商业程序数据上链,积分转币系统(终)

同步发布简书连接https://www.jianshu.com/writer#/notebooks/18826917/notes/33273306

上篇介绍了积分转币系统的技术架构和程序逻辑流程及部分代码,本篇将继续介绍代码部分,同时作者也发现 了在简书发布代码存在一个问题只能用截图,而且这样效率比较不高,好的一点就是防止考贝,保持原创.下面进入正题:

四、程序代码(续):

3.API接口的数据库部分:

表结构图示意:

                         
 

4。API积分换币部分:限于篇幅只有部分截图,重在程序结构示意明了

下面代码说明:右侧三个函数被封装后导出供外部调用,意在实现积分按时更新,插入,并兑换成代币

                         
 

 

                         
 

5.代币上链部分:

也封装成一 个接口模块,程序说明:代码截图中右侧是函数功能模块图,实现环境要求win10环境下命令行窗口:

如图:

                         
 

需要启动geth程序命令打开本地节点:geth命令如下:

geth --testnet --fast --cache=1024 --maxpeers 10000 --datadir="e:\EthereumTestdata" --rpc --rpcaddr 127.0.0.1 --rpcport 8545 --rpcapi web3,eth,personal --port 3000 console

注意: 所打开的本地节点,要求达到和以太坊网络数据完全同步,块高度为最新,(blocks=1)否则依然不能,把本地要上链数据同步到以太坊链上

 

                         
 

 

                         
 

 

                         
 

6.上链主程序:

                         
 

五、运行效果

以太坊浏览器查看地址https://ropsten.etherscan.io/address/0x133dc9a905455354892687a725c4c274cdbc017e#tokentxns

 

                         
 

本地mysql数据库代币汇总表

                         
 

六、运行过程

同时启动三个命令行窗口

1.本地以太以太坊节点geth窗口,上面已有截图

2.UI接口服务器程序监听窗口

                         
 

3.上链转币主调程序窗口

                         
 4.附件智能合约测试代码:smartTraderToken.sol文件
pragma solidity ^0.4.16;
/* 修改微信yyy99966*/
contract Token{

    function balanceOf(address _owner) public constant returns (uint256 balance);

    function transfer(address _to, uint256 _value) public returns (bool success);

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);

    function approve(address _spender, uint256 _value) public returns (bool success);

    function allowance(address _owner, address _spender) public 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 SmartTraderToken is Token {
    uint256 public totalSupply;
    string  public name;
    uint8   public decimals;
    string  public symbol;

    constructor(uint256 initialAmount, string tokenName, uint8 decimalUnits, string tokenSymbol) public {
        totalSupply = initialAmount * 10 ** uint256(decimalUnits);
        balances[msg.sender] = totalSupply;

        name = tokenName;
        decimals = decimalUnits;
        symbol = tokenSymbol;
    }

    function transfer(address _to, uint256 _value) public returns (bool success) {
        require(balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]);
        require(_to != 0x0);
        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
        emit Transfer(msg.sender, _to, _value);        //触发转币交易事件
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0);
        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
        emit Transfer(_from, _to, _value);            //触发转币交易事件
        return true;
    }
    function balanceOf(address _owner) public constant returns (uint256 balance) {
        return balances[_owner];
    }

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

    function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
        return allowed[_owner][_spender];        //允许_spender从_owner中转出的token数,也就是授权
    }
    function hello()  public  constant returns (string){
    return 'Hello World';
    }
    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
    
}

 

 

积分转币程序介绍(完)

posted @ 2018-09-14 17:27  web3网络科技  阅读(780)  评论(0编辑  收藏  举报