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
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
[url=][/url]
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; }[url=][/url]
积分转币程序介绍(完) |