webase go-sdk 简单使用

本流程在test目录下，其中用到的 solc-0.4.25 和 abigen 工具网上教程都比较详细，就暂时不展开聊，今天就大概描述流程。

1.将目录下的test.sol文件编译

复制代码
pragma solidity ^0.4.25;

import "./Table.sol";

contract test {
    
    string constant TABLE_NAME = "test2";
    
    event insertEvent(string id, string title, uint iuser_id,uint ruser_id,int stauts);
    event updateEvent(string id, int stauts);
    
    constructor() public{
        TableFactory tf = TableFactory(0x1001);
        
        tf.createTable(TABLE_NAME,"id","title,iuser_id,ruser_id,stauts,start_time,sign_time");
    }
    
    function set(string id, string title, uint iuser_id,uint ruser_id,int stauts) public returns(int) {
        TableFactory tf = TableFactory(0x1001);
        Table table = tf.openTable(TABLE_NAME);
        
        uint t = 0;
        
        Entry entry = table.newEntry();
        entry.set("id",id);
        entry.set("title",title);
        entry.set("iuser_id",iuser_id);
        entry.set("ruser_id",ruser_id);
        entry.set("stauts",stauts);
        entry.set("start_time",now);
        entry.set("sign_time",t);
        
        int count = table.insert(id,entry);
        emit insertEvent(id,title,iuser_id,ruser_id,stauts);
        return count;
    }
    
    function update(string id,int stauts) public returns(int) {
        TableFactory tf = TableFactory(0x1001);
        Table table = tf.openTable(TABLE_NAME);
        
        Condition condition = table.newCondition();
        //condition.EQ("id",id);
        
        Entry entry = table.newEntry();
        entry.set("stauts",stauts);
        
        if (stauts == 5){
            entry.set("sign_time",now);
        }
        
        int count = table.update(id,entry,condition);
        emit updateEvent(id,stauts);
        return count;
    }
    
    function get(string id) public view returns (string,uint,uint,int,uint,uint) {
        TableFactory tf = TableFactory(0x1001);
        Table table = tf.openTable(TABLE_NAME);
        
        Condition condition = table.newCondition();
        //condition.EQ("id",id);
        Entries entries = table.select(id,condition);
        
        if(entries.size() == 0){
            return("", 0, 0, 0, 0, 0);
        }
        
        uint iuser_id;
        uint ruser_id;
        int stauts;
        iuser_id = entries.get(0).getUInt("iuser_id");
        ruser_id = entries.get(0).getUInt("ruser_id");
        stauts = entries.get(0).getInt("stauts");
        
        return (entries.get(0).getString("title"), iuser_id, ruser_id, stauts,entries.get(0).getUInt("start_time"), entries.get(0).getUInt("sign_time"));
    }
    
}
test.sol
复制代码

由于引用了Table.sol，所以还要将Table.sol放到目录下。

复制代码
pragma solidity ^0.4.24;

contract TableFactory {
    function openTable(string) public view returns (Table); //open table
    function createTable(string, string, string) public returns (int256); //create table
}

//select condition
contract Condition {
    function EQ(string, int256) public view;
    function EQ(string, string) public view;
    function EQ(string, address) public view;

    function NE(string, int256) public view;
    function NE(string, string) public view;

    function GT(string, int256) public view;
    function GE(string, int256) public view;

    function LT(string, int256) public view;
    function LE(string, int256) public view;

    function limit(int256) public view;
    function limit(int256, int256) public view;
}

//one record
contract Entry {
    function getInt(string) public view returns (int256);
    function getUInt(string) public view returns (uint256);
    function getAddress(string) public view returns (address);
    function getBytes64(string) public view returns (bytes1[64]);
    function getBytes32(string) public view returns (bytes32);
    function getString(string) public view returns (string);

    function set(string, int256) public;
    function set(string, uint256) public;
    function set(string, string) public;
    function set(string, address) public;
}

//record sets
contract Entries {
    function get(int256) public view returns (Entry);
    function size() public view returns (int256);
}

//Table main contract
contract Table {
    function select(string, Condition) public view returns (Entries);
    function insert(string, Entry) public returns (int256);
    function update(string, Entry, Condition) public returns (int256);
    function remove(string, Condition) public returns (int256);

    function newEntry() public view returns (Entry);
    function newCondition() public view returns (Condition);
}

contract KVTableFactory {
    function openTable(string) public view returns (KVTable);
    function createTable(string, string, string) public returns (int256);
}

//KVTable per permiary key has only one Entry
contract KVTable {
    function get(string) public view returns (bool, Entry);
    function set(string, Entry) public returns (int256);
    function newEntry() public view returns (Entry);
}
Table.sol
复制代码

然后执行命令：

./solc-0.4.25 --bin --abi -o ./ ./test.sol

结果如下：

 

2.abigen生成go文件

./abigen --bin ./test.bin --abi ./test.abi --pkg test --type test --out ./test.go

 结果如下：

 

3.复制节点的SDK文件

 将上面的sdk文件夹，直接复制到test目录下

4.使用get_account.sh脚本生成账户私钥

 get_account.sh

 该脚本在FISCO的console中，可以直接复制下来执行

./get_account.sh

执行完毕，生成一个目录，里面有我们需要的账户私钥文件（这个账户私钥文件（*.pem），可以重复使用），将它拷贝到test目录下 。

5.配置config.toml

 可以拷贝go-sdk里的config.toml

 也可以直接新建一个config.toml文件

复制代码
[Network]
#type rpc or channel
Type="channel"
CAFile="./sdk/ca.crt"
Cert="./sdk/sdk.crt"
Key="./sdk/sdk.key"
# if the certificate context is not empty, use it, otherwise read from the certificate file
# multi lines use triple quotes
CAContext=''''''
KeyContext=''''''
CertContext=''''''

[[Network.Connection]]
NodeURL="127.0.0.1:20200"
GroupID=1
# [[Network.Connection]]
# NodeURL="127.0.0.1:20200"
# GroupID=2

[Account]
# only support PEM format for now
KeyFile="./accounts/0x2b4c58c9b6bb9165931c9956f96d69723bb92754.pem"

[Chain]
ChainID=1
SMCrypto=false

[log]
Path="./"
config.toml
复制代码

将config.toml的KeyFile修改为上一步获得的pem文件的名字，然后其他的NodeURL和GroupID等，根据自己需要进行修改。

6.使用接口

在test目录下新建一个cmd目录，编写一个main.go来调用链码

复制代码
package main

import (
    "math/big"
    "fmt"
    "log"
    "test"
    "github.com/FISCO-BCOS/go-sdk/client"
    "github.com/FISCO-BCOS/go-sdk/conf"
    "github.com/ethereum/go-ethereum/common"
)

func main(){
    configs, err := conf.ParseConfigFile("config.toml")  //读取config.toml文件
    if err != nil {
        log.Fatal(err)
    }
    config := &configs[0]

    client, err := client.Dial(config)  //加载配置文件，生成client进行相关链操作
    if err != nil {
        log.Fatal(err)
    }

    contractAddress := common.HexToAddress("0xac05ff0709f443db85f7cd524e142e1778a8e426") // 这里请放入刚刚部署的合约地址，注意，是你自己的机子部署的地址
    instance, err := test.NewTest(contractAddress, client)  //根据地址和client生成test合约对象
    if err != nil {
        log.Fatal(err)
    }

    testSession := &test.TestSession{Contract: instance, CallOpts: *client.GetCallOpts(), TransactOpts: *client.GetTransactOpts()}

    a := big.NewInt(7)
    b := big.NewInt(8)
    c := big.NewInt(0)
    _,tx,receipt,err := testSession.Set("5","gosdk_title",a,b,c)
    if err != nil{
        log.Fatal(err)
    }
    fmt.Printf("tx sent: %s\n", tx.Hash().Hex())  //调用set方法的交易hash
    fmt.Printf("transaction hash of receipt: %s\n", receipt.GetTransactionHash())  //调用set方法的交易hash ,与上面的hash是一样，只是存在不同的地方而已

    title,iuser_id,ruser_id,stauts,start_time,sign_time,err := testSession.Get("5")
    if err != nil{
        log.Fatal(err)
    }
    fmt.Printf("title: %s\niuser_id: %d\nruser_id: %d\nstauts: %d\nstart_time: %d\nsign_time: %d\n",title,iuser_id,ruser_id,stauts,start_time,sign_time)
}
main.go
复制代码

在执行这个main.go之前应该先部署链码，但是由于笔者是先在webase上编写test.sol部署后，才进行go-sdk的配置的，所以这里就不重复部署了。

go mod init
go mod tidy
go run ./cmd/main.go

结果如下：

 

posted @   昨晚没做梦  阅读(51)  评论(0)  编辑  收藏  举报
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