Fabric智能合约（base）

Posted 2021-03-15 jockming

这里的智能合约仅包含Init函数和Invoke函数。

为什么一定是这两个方法？

因为在源码中的智能合约模块有这样的接口，如果要完成智能合约的相关编程，就需要实现源码中定义的接口，接口中定义了这两个方法。空口无凭，下面我给大家看一个图：

文件路径：github.com/hyperledger/fabric/core/chaincode/shim

 这个文件中的内容如下：

go语言

package main

import (

	"github.com/hyperledger/fabric/core/chaincode/shim"
	pb "github.com/hyperledger/fabric/protos/peer"
)

var logger = shim.NewLogger("example_cc0")

// SimpleChaincode example simple Chaincode implementation
type SimpleChaincode struct {

}

// Init initializes the chaincode state
func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface) pb.Response {

}

// Invoke makes payment of X units from A to B
func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response {

}

func main() {
	err := shim.Start(new(SimpleChaincode))
	if err != nil {
		logger.Errorf("Error starting Simple chaincode: %s", err)
	}
}

java语言

package org.hyperledger.fabric.example;

import io.netty.handler.ssl.OpenSsl;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hyperledger.fabric.shim.ChaincodeBase;
import org.hyperledger.fabric.shim.ChaincodeStub;


public class SimpleChaincode extends ChaincodeBase {

    private static Log logger = LogFactory.getLog(SimpleChaincode.class);

    @Override
    public Response init(ChaincodeStub stub) {

    }

    @Override
    public Response invoke(ChaincodeStub stub) {

    }

    public static void main(String[] args) {
        logger.info("OpenSSL avaliable: " + OpenSsl.isAvailable());
        new SimpleChaincode().start(args);
    }

}