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Copy path以太坊合约
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以太坊合约
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溯源合约
pragma solidity ^0.4.20;
contract Trace {
enum State { Origin, Factory, QA, Shipping, Received, Pending }
string name;
uint price;
uint weight;
bool lock = false; //合约锁
bool close = false; //合约状态
uint number = 1;
uint attr_number = 1;
mapping (address => string) guestbook; //客户留言本
struct Attribute {
address owner; // 供应商
string name; // 属性的名字
string date; // 生产日期
string desc; // 描述信息
}
mapping (uint => Attribute) attribute;
struct Logistics {
address owner; // 中转站
string date; // 转运日期
State status; // 状态
string message; // 留言信息
}
mapping (uint => Logistics) stations;
function Trace(string _name, uint _price, uint _weight) public {
name = _name;
price = _price;
weight = _weight;
}
// 名称
function getName() public view returns(string){
return name;
}
// 价格
function getPrice() public view returns(uint){
return price;
}
// 重量
function getWeight() public view returns(uint){
return weight;
}
// 增加商品属性
function putAttribute(address _owner,string _name, string _date, string _desc ) public{
if(lock == false){
Attribute memory item = Attribute(_owner, _name,_date,_desc);
attribute[attr_number] = item;
attr_number = attr_number + 1;
}
}
// 获得属性
function getAttribute(uint _attr_number) public view returns(address, string, string, string) {
require(_attr_number < attr_number);
Attribute memory item = attribute[_attr_number];
return (item.owner, item.name, item.date, item.desc);
}
// 增加物流中转信息
function putLogistics(address _owner,string _date, State _status, string _message ) public{
if(close == false){
Logistics memory node = Logistics(_owner,_date,_status,_message);
stations[number] = node;
number = number + 1;
lock = true;
}
if (_status == State.Received) {
close = true;
}
}
// 获得中转信息
function getLogistics(uint _number) public view returns(address, string, State, string) {
require(_number < number);
Logistics memory node = stations[_number];
return (node.owner, node.date, node.status, node.message);
}
// 或者转中站数量
function getLogisticsCount() public view returns(uint){
return number;
}
// 客户留言
function addGuestbook(address _owner, string message) public{
guestbook[_owner] = message;
}
}
合约部署，需要输入三个参数，分别是名称，价格和装量
Trace(string _name, uint _price, uint _weight)
产品属性可以在出厂前设置，一旦出厂进入物流阶段就不允许在更改了。
应用场景一
调用合约案例一，这是没有经过深加工的原产品案例。例如 Trace("山羊肉", 25, 50)
var contract;
Trace.deployed().then(function(instance){contract=instance;});
contract.getName();
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","颜色", "", "黑色")
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","产地", "", "内蒙古")
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","出生", "2017-01-12", "XXX牧场")
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","宰杀", "2018-02-12", "XXX宰杀")
contract.putLogistics("0x627306090abab3a6e1400e9345bc60c78a8bef57","2018-02-20",0,"XXX牧场");
contract.putLogistics("0x627306090abab3a6e1400e9345bc60c78a8bef57","2018-02-20",1,"XXX屠宰公司");
contract.putLogistics("0xc5fdf4076b8f3a5357c5e395ab970b5b54098fef","2018-02-22",2,"XXX检验检疫");
contract.putLogistics("0xf17f52151ebef6c7334fad080c5704d77216b732","2018-02-21",3,"XXX一级经销商");
contract.putLogistics("0x821aea9a577a9b44299b9c15c88cf3087f3b5544","2018-02-23",3,"XXX二级经销商");
contract.putLogistics("0x821aea9a577a9b44299b9c15c88cf3087f3b5544","2018-02-24",3,"XXX批发中心");
contract.putLogistics("0x821aea9a577a9b44299b9c15c88cf3087f3b5544","2018-02-25",3,"XXX超市");
contract.putLogistics("0x0d1d4e623d10f9fba5db95830f7d3839406c6af2","2018-02-26",4,"用户包裹收到");
contract.getNode(); // 获得物流经过的转运站数量
应用场景二
调用合约案例二，这是深加工的产品案例。例如 Trace("牦牛肉干", 80, 500)
var contract;
Trace.deployed().then(function(instance){contract=instance;});
contract.getName();
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","调和油", "2016-10-10", "银龙鱼牌")
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","辣椒粉", "2016-10-30", "西藏XXX公司生产")
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","生抽", "2016-01-12", "XXX生抽，XXX生产")
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","山梨酸钾", "2017-02-12", "XXX生产")
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","防腐剂", "2017-02-12", "XXX生产")
contract.putAttribute("0x627306090abab3a6e1400e9345bc60c78a8bef57","牦牛肉", "2017-02-12", "XXX牧场")
contract.putLogistics("0x627306090abab3a6e1400e9345bc60c78a8bef57","2018-02-20",0,"XXX牧场");
contract.putLogistics("0x627306090abab3a6e1400e9345bc60c78a8bef57","2018-02-20",1,"XXX公司生产");
contract.putLogistics("0xc5fdf4076b8f3a5357c5e395ab970b5b54098fef","2018-02-22",2,"XXX通过QA、QC");
contract.putLogistics("0xf17f52151ebef6c7334fad080c5704d77216b732","2018-02-21",3,"XXX一级经销商");
contract.putLogistics("0x821aea9a577a9b44299b9c15c88cf3087f3b5544","2018-02-23",3,"XXX二级经销商");
contract.putLogistics("0x821aea9a577a9b44299b9c15c88cf3087f3b5544","2018-02-24",3,"XXX批发中心");
contract.putLogistics("0x821aea9a577a9b44299b9c15c88cf3087f3b5544","2018-02-25",3,"XXX超市");
contract.putLogistics("0x0d1d4e623d10f9fba5db95830f7d3839406c6af2","2018-02-26",4,"用户包裹收到");
contract.getNode(); // 获得物流经过的转运站数量
用户留言
contract.addGuestbook("0x0d1d423e623d10f9d10f9d10f9d10f9d10f9fba5","东西好吃，下次还买，给好评");
合约代码的测试
TODO://