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
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"));}}
由于引用了Table.sol，所以还要将Table.sol放到目录下。
pragma solidity ^0.4.24;contract TableFactory {function openTable(string) public view returns (Table); //open tablefunction 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); }
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
[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="./"
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
package mainimport ("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hashfmt.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) }
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：
