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:
pragma solidity ^0.4.16; contract ERC20Token { uint256 public totalSupply; 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 JuehaiToken is ERC20Token { string public name;// = "JuehaiCoin"; string public symbol;// = "Juehai"; uint8 public decimals;// = 6; uint256 public totalSupply;// = 100000000 * (10 ** uint256(decimals)); // mapping (address => uint256) balances; // mapping (address => mapping (address => uint256)) allowed; //function JuehaiToken() { //totalSupply = INITIAL_SUPPLY; //balances[msg.sender] = INITIAL_SUPPLY; //} function TokenDemo(uint256 initialAmount, string tokenName, uint8 decimalUnits, string tokenSymbol) public { totalSupply = initialAmount * 10 ** uint256(decimalUnits); // 设置初始总量 balances[msg.sender] = totalSupply; // 初始token数量全部给予合约的创建者 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; balances[_to] += _value; Transfer(msg.sender, _to, _value); return true; } function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) { require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value); balances[_to] += _value; balances[_from] -= _value; allowed[_from][msg.sender] -= _value; Transfer(_from, _to, _value); 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; Approval(msg.sender, _spender, _value); return true; } function allowance(address _owner, address _spender) public constant returns (uint256 remaining) { return allowed[_owner][_spender]; } }
积分转币程序介绍(完)