Netkiller Blockchain 手札
Mr. Neo Chan, 陈景峯(BG7NYT)
中国广东省深圳市望海路半岛城邦三期
518067
+86 13113668890
<netkiller@msn.com>
文档始创于2018-02-10
版权 © 2018 Netkiller(Neo Chan). All rights reserved.
版权声明
转载请与作者联系，转载时请务必标明文章原始出处和作者信息及本声明。
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2018-06-01
内容摘要
这一部关于区块链开发及运维的电子书。
为什么会写区块链电子书？因为2018年是区块链年，区块链是一个风口，前几个风口我都错过了。例如web2.0, 云， 大数据等等，都从身旁擦肩而过。所以我要抓住这次。
这本电子书是否会出版（纸质图书）？ 不会，因为互联网技术更迭太快，纸质书籍的内容无法实时更新，一本书动辄百元，很快就成为垃圾，你会发现目前市面的上区块链书籍至少是一年前写的，内容已经过时，很多例子无法正确运行。所以我不会出版，电子书的内容会追逐技术发展，及时跟进软件版本的升级，做到内容最新，至少是主流。
这本电子书与其他区块链书籍有什么不同？市面上大部分区块链书籍都是用2/3去讲区块链原理，只要不到 1/3 的干货，干货不够理论来凑，通篇将理论或是大谈特谈区块链行业，这些内容更多是头脑风暴，展望区块链，均无法落地实施。本书与那些书籍完全不同，不讲理论和原理，面向应用落地，注重例子，均是干货。
写作原则，无法落地的项目作者绝对不会写。凡是写入电子的内容均具备可操作，可落地。
电子书更新频率？每天都会有新内容加入，更新频率最迟不会超过一周，更新内容请关注 https://github.com/netkiller/netkiller.github.io/commits/master
本文采用碎片化写作，原文会不定期更新，请尽量阅读原文。 http://www.netkiller.cn/blockchain/index.html
您的打赏是我的写作动力： http://www.netkiller.cn/blockchain/donations.html
接受 ETH 捐赠： 0x3e827461Cc53ed7c75A29187CfF39629FCAE3661
39.1.6. Fabric Java SDK Demo
39.1.6.1. Maven pom.xml 文件
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>cn.netkiller</groupId>
<artifactId>fabric-sdk-java</artifactId>
<version>0.0.1-SNAPSHOT</version>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.hyperledger.fabric-sdk-java/fabric-sdk-java -->
<dependency>
<groupId>org.hyperledger.fabric-sdk-java</groupId>
<artifactId>fabric-sdk-java</artifactId>
<version>1.2.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>apache-log4j-extras</artifactId>
<version>1.1</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.16</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.16</version>
</dependency>
<!-- <dependency> <groupId>net.sf.json-lib</groupId> <artifactId>json-lib</artifactId> <version>2.4</version> </dependency> -->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.6.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.3</version>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
39.1.6.2. chaincode_example02.go
Chaincode 是 Hyperledger Fabric官方提供的
/*
Copyright IBM Corp. 2016 All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
//WARNING - this chaincode's ID is hard-coded in chaincode_example04 to illustrate one way of
//calling chaincode from a chaincode. If this example is modified, chaincode_example04.go has
//to be modified as well with the new ID of chaincode_example02.
//chaincode_example05 show's how chaincode ID can be passed in as a parameter instead of
//hard-coding.
import (
"fmt"
"strconv"
"github.com/hyperledger/fabric/core/chaincode/shim"
pb "github.com/hyperledger/fabric/protos/peer"
)
// SimpleChaincode example simple Chaincode implementation
type SimpleChaincode struct {
}
func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface) pb.Response {
fmt.Println("ex02 Init")
_, args := stub.GetFunctionAndParameters()
var A, B string // Entities
var Aval, Bval int // Asset holdings
var err error
if len(args) != 4 {
return shim.Error("Incorrect number of arguments. Expecting 4")
}
// Initialize the chaincode
A = args[0]
Aval, err = strconv.Atoi(args[1])
if err != nil {
return shim.Error("Expecting integer value for asset holding")
}
B = args[2]
Bval, err = strconv.Atoi(args[3])
if err != nil {
return shim.Error("Expecting integer value for asset holding")
}
fmt.Printf("Aval = %d, Bval = %d\n", Aval, Bval)
// Write the state to the ledger
err = stub.PutState(A, []byte(strconv.Itoa(Aval)))
if err != nil {
return shim.Error(err.Error())
}
err = stub.PutState(B, []byte(strconv.Itoa(Bval)))
if err != nil {
return shim.Error(err.Error())
}
return shim.Success(nil)
}
func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface) pb.Response {
fmt.Println("ex02 Invoke")
function, args := stub.GetFunctionAndParameters()
if function == "invoke" {
// Make payment of X units from A to B
return t.invoke(stub, args)
} else if function == "delete" {
// Deletes an entity from its state
return t.delete(stub, args)
} else if function == "query" {
// the old "Query" is now implemtned in invoke
return t.query(stub, args)
}
return shim.Error("Invalid invoke function name. Expecting \"invoke\" \"delete\" \"query\"")
}
// Transaction makes payment of X units from A to B
func (t *SimpleChaincode) invoke(stub shim.ChaincodeStubInterface, args []string) pb.Response {
var A, B string // Entities
var Aval, Bval int // Asset holdings
var X int // Transaction value
var err error
if len(args) != 3 {
return shim.Error("Incorrect number of arguments. Expecting 3")
}
A = args[0]
B = args[1]
// Get the state from the ledger
// TODO: will be nice to have a GetAllState call to ledger
Avalbytes, err := stub.GetState(A)
if err != nil {
return shim.Error("Failed to get state")
}
if Avalbytes == nil {
return shim.Error("Entity not found")
}
Aval, _ = strconv.Atoi(string(Avalbytes))
Bvalbytes, err := stub.GetState(B)
if err != nil {
return shim.Error("Failed to get state")
}
if Bvalbytes == nil {
return shim.Error("Entity not found")
}
Bval, _ = strconv.Atoi(string(Bvalbytes))
// Perform the execution
X, err = strconv.Atoi(args[2])
if err != nil {
return shim.Error("Invalid transaction amount, expecting a integer value")
}
Aval = Aval - X
Bval = Bval + X
fmt.Printf("Aval = %d, Bval = %d\n", Aval, Bval)
// Write the state back to the ledger
err = stub.PutState(A, []byte(strconv.Itoa(Aval)))
if err != nil {
return shim.Error(err.Error())
}
err = stub.PutState(B, []byte(strconv.Itoa(Bval)))
if err != nil {
return shim.Error(err.Error())
}
return shim.Success(nil)
}
// Deletes an entity from state
func (t *SimpleChaincode) delete(stub shim.ChaincodeStubInterface, args []string) pb.Response {
if len(args) != 1 {
return shim.Error("Incorrect number of arguments. Expecting 1")
}
A := args[0]
// Delete the key from the state in ledger
err := stub.DelState(A)
if err != nil {
return shim.Error("Failed to delete state")
}
return shim.Success(nil)
}
// query callback representing the query of a chaincode
func (t *SimpleChaincode) query(stub shim.ChaincodeStubInterface, args []string) pb.Response {
var A string // Entities
var err error
if len(args) != 1 {
return shim.Error("Incorrect number of arguments. Expecting name of the person to query")
}
A = args[0]
// Get the state from the ledger
Avalbytes, err := stub.GetState(A)
if err != nil {
jsonResp := "{\"Error\":\"Failed to get state for " + A + "\"}"
return shim.Error(jsonResp)
}
if Avalbytes == nil {
jsonResp := "{\"Error\":\"Nil amount for " + A + "\"}"
return shim.Error(jsonResp)
}
jsonResp := "{\"Name\":\"" + A + "\",\"Amount\":\"" + string(Avalbytes) + "\"}"
fmt.Printf("Query Response:%s\n", jsonResp)
return shim.Success(Avalbytes)
}
func main() {
err := shim.Start(new(SimpleChaincode))
if err != nil {
fmt.Printf("Error starting Simple chaincode: %s", err)
}
}
39.1.6.3. bcs-whbsxu-sdk-config.yaml
name: "global-trade-network"
x-type: "hlfv1"
x-loggingLevel: info
description: "The network to be in if you want to stay in the global trade business"
version: 1.0.0
client:
organization: 23e50b60552eb5b6f32d3c1563305dd4530dc2f0
logging:
level: info
peer:
timeout:
connection: 10s
queryResponse: 45s
executeTxResponse: 120s
eventService:
timeout:
connection: 10s
registrationResponse: 50s
orderer:
timeout:
connection: 10s
response: 45s
cryptoconfig:
path: /opt/gopath/src/github.com/hyperledger/fabric
credentialStore:
path: "/tmp/hfc-kvs"
cryptoStore:
path: /tmp/msp
wallet: wallet-name
BCCSP:
security:
enabled: true
default:
provider: "SW"
hashAlgorithm: "SHA2"
softVerify: true
ephemeral: false
level: 256
channels:
artbank:
orderers:
- orderer-c18fb08fe08fca399fa6baf66bee2f59e50fcea5-0.orderer-c18fb08fe08fca399fa6baf66bee2f59e50fcea5.default.svc.cluster.local
peers:
peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-0.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local:
endorsingPeer: true
chaincodeQuery: true
ledgerQuery: true
eventSource: true
peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-1.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local:
endorsingPeer: true
chaincodeQuery: true
ledgerQuery: true
eventSource: true
chaincodes:
- example:1.0
organizations:
23e50b60552eb5b6f32d3c1563305dd4530dc2f0:
mspid: 23e50b60552eb5b6f32d3c1563305dd4530dc2f0MSP
cryptoPath: /opt/fabric/23e50b60552eb5b6f32d3c1563305dd4530dc2f0.peer/msp
tlsCryptoKeyPath: /opt/fabric/23e50b60552eb5b6f32d3c1563305dd4530dc2f0.peer/tls/server.key
tlsCryptoCertPath: /opt/fabric/23e50b60552eb5b6f32d3c1563305dd4530dc2f0.peer/tls/server.crt
peers:
- peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-0.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local
- peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-1.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local
certificateAuthorities:
- ca-org1
ordererorg:
mspID: "c18fb08fe08fca399fa6baf66bee2f59e50fcea5MSP"
cryptoPath: /opt/fabric/c18fb08fe08fca399fa6baf66bee2f59e50fcea5.orderer/msp
orderer-eip: 49.4.15.203
orderers:
orderer-c18fb08fe08fca399fa6baf66bee2f59e50fcea5-0.orderer-c18fb08fe08fca399fa6baf66bee2f59e50fcea5.default.svc.cluster.local:
url: grpcs://49.4.15.203:30805
grpcOptions:
ssl-target-name-override: orderer-c18fb08fe08fca399fa6baf66bee2f59e50fcea5-0.orderer-c18fb08fe08fca399fa6baf66bee2f59e50fcea5.default.svc.cluster.local
grpc-max-send-message-length: 15
sslProvider: openSSL
negotiationType: TLS
hostnameOverride: orderer-c18fb08fe08fca399fa6baf66bee2f59e50fcea5-0.orderer-c18fb08fe08fca399fa6baf66bee2f59e50fcea5.default.svc.cluster.local
tlsCACerts:
path: /opt/fabric/c18fb08fe08fca399fa6baf66bee2f59e50fcea5.orderer/msp/tlscacerts/tlsca.c18fb08fe08fca399fa6baf66bee2f59e50fcea5-cert.pem
peer-eip: 49.4.15.203
peers:
peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-0.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local:
url: grpcs://49.4.15.203:30605
eventUrl: grpcs://49.4.15.203:30705
grpcOptions:
ssl-target-name-override: peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-0.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local
grpc.http2.keepalive_time: 15
sslProvider: openSSL
negotiationType: TLS
hostnameOverride: peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-0.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local
tlsCACerts:
path: /opt/fabric/23e50b60552eb5b6f32d3c1563305dd4530dc2f0.peer/msp/tlscacerts/tlsca.23e50b60552eb5b6f32d3c1563305dd4530dc2f0-cert.pem
peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-1.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local:
url: grpcs://49.4.15.203:30606
eventUrl: grpcs://49.4.15.203:30706
grpcOptions:
ssl-target-name-override: peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-1.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local
grpc.http2.keepalive_time: 15
sslProvider: openSSL
negotiationType: TLS
hostnameOverride: peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-1.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local
tlsCACerts:
path: /opt/fabric/23e50b60552eb5b6f32d3c1563305dd4530dc2f0.peer/msp/tlscacerts/tlsca.23e50b60552eb5b6f32d3c1563305dd4530dc2f0-cert.pem
certificateAuthorities:
ca-org1:
url: https://ca_peerOrg1:7054
httpOptions:
verify: true
tlsCACerts:
path: $GOPATH/src/github.com/hyperledger/fabric-sdk-go/test/api-server/tls/fabricca/certs/ca_root.pem
client:
keyfile: $GOPATH/src/github.com/hyperledger/fabric-sdk-go/test/api-server/tls/fabricca/certs/client/client_fabric_client-key.pem
certfile: $GOPATH/src/github.com/hyperledger/fabric-sdk-go/test/api-server/tls/fabricca/certs/client/client_fabric_client.pem
registrar:
enrollId: admin
enrollSecret: adminpw
caName: ca-org1
39.1.6.4. FabricHelper.java
package cn.netkiller.fabric;
import org.apache.commons.io.IOUtils;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.openssl.PEMParser;
import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
import org.hyperledger.fabric.sdk.*;
import org.hyperledger.fabric.sdk.NetworkConfig.OrgInfo;
import org.hyperledger.fabric.sdk.exception.InvalidArgumentException;
import org.hyperledger.fabric.sdk.security.CryptoSuite;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.yaml.snakeyaml.Yaml;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringReader;
import java.security.PrivateKey;
import java.util.*;
import java.util.concurrent.TimeUnit;
import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonValue;
import static java.nio.charset.StandardCharsets.UTF_8;
public class FabricHelper {
private Logger logger = LoggerFactory.getLogger(FabricHelper.class);
private String ymlFileName = "./huawei.yaml";
private String channelName;
private String chaincodeName;
private String accessKey;
private Map<String, HFClient> clientMap;
private Map<String, Channel> channelMap;
private FabricHelper() {
channelMap = new HashMap<>();
clientMap = new HashMap<>();
}
private static class Holder {
private static FabricHelper instance = new FabricHelper();
}
public static FabricHelper getInstance(){
return Holder.instance;
}
public void setConfigCtx(String configPath) {
if (configPath == null || configPath.equals("")) {
logger.error("config path is empty! please input correct ymal path!");
}
this.ymlFileName = configPath;
try {
InputStream stream = new FileInputStream(new File(this.ymlFileName));
Yaml yaml = new Yaml();
Map<String, Object> confYaml = yaml.load(stream);
JsonObject confJson = Json.createObjectBuilder(confYaml).build();
this.accessKey = confJson.getJsonObject("client").getString("organization");
JsonObject channels = confJson.getJsonObject("channels");
//因为只有一个channel 所以只需获取键名即可
String chanNameTemp = channels.keySet().toString();
this.channelName = chanNameTemp.substring(chanNameTemp.indexOf("[") + 1, chanNameTemp.indexOf("]"));
// 因为只有一个chaincode 所以只需取chaincode数组的第一个
String codeNameTemp = channels.getJsonObject(this.channelName).getJsonArray("chaincodes").getString(0);
this.chaincodeName = codeNameTemp.substring(0, codeNameTemp.indexOf(":"));
}
catch (Exception e)
{
e.printStackTrace();
logger.error(e.getMessage());
}
}
public FabricHelper setConfigPath(String configPath){
this.ymlFileName=configPath;
return this;
}
public FabricHelper setChaincodeName(String chaincodeName) {
this.chaincodeName=chaincodeName;
return this;
}
public FabricHelper setChannelName(String channelName) {
this.channelName=channelName;
return this;
}
public FabricHelper setAccessKey(String accesskey) {
this.accessKey=accesskey;
return this;
}
private NetworkConfig loadfromYamlFile(String fileName) {
try {
return NetworkConfig.fromYamlFile(new File(fileName));
} catch (Exception e) {
String msg = "can't load yaml file: " + fileName;
logger.error(msg, e);
return null;
}
}
private Channel buildChannel(String channelName, NetworkConfig networkConfig, HFClient client) {
try {
FabricUser user = genFabricUser(accessKey);
client.setUserContext(user);
Channel channel = client.loadChannelFromConfig(channelName, networkConfig);
channel.initialize();
return channel;
} catch (Exception e) {
String msg = "can't construct channel: " + networkConfig.getClientOrganization();
logger.error(msg, e);
return null;
}
}
private HFClient getClient(String orgName) {
HFClient client = clientMap.get(orgName);
if (client == null) {
synchronized (clientMap) {
client = clientMap.get(orgName);
if (client != null) {
return client;
}
client = HFClient.createNewInstance();
try {
client.setCryptoSuite(getCryptoSuite());
clientMap.put(orgName, client);
} catch (Exception e) {
String msg = "can't construct client: " + orgName;
logger.error(msg, e);
System.out.println(msg);
return null;
}
}
}
return client;
}
private CryptoSuite getCryptoSuite() throws java.lang.IllegalAccessException, java.lang.InstantiationException, java.lang.ClassNotFoundException, org.hyperledger.fabric.sdk.exception.CryptoException, org.hyperledger.fabric.sdk.exception.InvalidArgumentException, java.lang.NoSuchMethodException, java.lang.reflect.InvocationTargetException, FileNotFoundException{
CryptoSuite cs = null;
InputStream stream = new FileInputStream(this.ymlFileName);
Map<String, Object> map = new Yaml().load(stream);
JsonObject root = Json.createObjectBuilder(map).build();
String hashAlgo =root.getJsonObject("client").getJsonObject("BCCSP").getJsonObject("security").getString("hashAlgorithm");
//for sm Algorithm
if (hashAlgo.equals("SM3")){
Properties properties = new Properties();
properties.setProperty("org.hyperledger.fabric.sdk.hash_algorithm", "SM3");
properties.setProperty("org.hyperledger.fabric.sdk.crypto.default_signature_userid", "1234567812345678");
cs = CryptoSuite.Factory.getCryptoSuite(properties);
}else{
cs = CryptoSuite.Factory.getCryptoSuite();
}
return cs;
}
private Channel getChannel(String accessKey, HFClient client) {
Channel channel = channelMap.get(accessKey);
if (channel == null) {
synchronized (channelMap) {
channel = channelMap.get(accessKey);
if (channel != null) {
return channel;
}
NetworkConfig networkConfig = loadfromYamlFile(ymlFileName);
if (networkConfig == null) {
return null;
}
try {
networkConfig.getOrdererNames().forEach(item -> {
try {
Properties p = networkConfig.getOrdererProperties(item);
p.setProperty("hostnameOverride", item);
p.setProperty("clientCertFile", GetTlsCert(ymlFileName, "ordererorg"));
p.setProperty("clientKeyFile", GetTlsKey(ymlFileName, "ordererorg"));
networkConfig.setOrdererProperties(item, p);
} catch (InvalidArgumentException e) {
throw new RuntimeException(e);
}
});
networkConfig.getPeerNames().forEach(item -> {
try {
Properties p = networkConfig.getPeerProperties(item);
String orgId = getOrgIdByPeer(networkConfig,item);
p.setProperty("hostnameOverride", item);
p.setProperty("clientCertFile", GetTlsCert(ymlFileName, orgId));
p.setProperty("clientKeyFile", GetTlsKey(ymlFileName, orgId));
networkConfig.setPeerProperties(item, p);
} catch (InvalidArgumentException e) {
throw new RuntimeException(e);
}
});
networkConfig.getEventHubNames().forEach(item -> {
try {
Properties p = networkConfig.getEventHubsProperties(item);
String orgId = getOrgIdByPeer(networkConfig,item);
p.setProperty("hostnameOverride", item);
p.setProperty("clientCertFile", GetTlsCert(ymlFileName, orgId));
p.setProperty("clientKeyFile", GetTlsKey(ymlFileName, orgId));
networkConfig.setEventHubProperties(item, p);
} catch (InvalidArgumentException e) {
throw new RuntimeException(e);
}
});
networkConfig.getChannelNames().forEach( item -> {
if (channelName!="" ){
channelName = item;
}
});
} catch (Exception e) {
String msg = "can't get channel: " + accessKey;
logger.error(msg, e);
return null;
}
channel = buildChannel(channelName, networkConfig, client);
if (channel != null) {
channelMap.put(accessKey, channel);
}
}
}
return channel;
}
private String getCryptoPath(String configFile, String orgId) {
JsonObject root = null;
try {
InputStream stream = new FileInputStream(configFile);
Yaml yaml = new Yaml();
Map<String, Object> map = yaml.load(stream);
root = Json.createObjectBuilder(map).build();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
JsonObject orgs = root.getJsonObject("organizations");
for (Map.Entry<String, JsonValue> o : orgs.entrySet()) {
if (orgId.equals(o.getKey())) {
JsonObject v = (JsonObject) o.getValue();
return v.getString("cryptoPath");
}
}
return "";
}
private String GetTlsCert(String configFile, String orgId){
String msp = getCryptoPath(configFile, orgId);
int index = msp.lastIndexOf("msp");
String ret = msp.substring(0, index)+"tls/server.crt";
logger.debug("tls cert for " + orgId +",path:"+ ret);
return ret;
}
private String GetTlsKey(String configFile, String orgId){
String msp = getCryptoPath(configFile, orgId);
int index = msp.lastIndexOf("msp");
String ret = msp.substring(0, index)+"tls/server.key";
logger.debug("tls key for " + orgId +",path:"+ ret);
return ret;
}
private String getOrgIdByPeer(NetworkConfig config, String peerName){
for ( OrgInfo o : config.getOrganizationInfos()) {
for (String p : o.getPeerNames()){
if ( p.equals(peerName) ){
return o.getName();
}
}
}
return "";
}
private FabricUser genFabricUser(String accessKey) {
FabricUser user = new FabricUser(accessKey);
String msp = getCryptoPath(this.ymlFileName, accessKey);
String adminPrivateKeyString = extractPemString(msp,"keystore");
String signedCert = extractPemString(msp, "signcerts");
PrivateKey privateKey = null;
try {
privateKey = getPrivateKeyFromString(adminPrivateKeyString);
} catch (IOException ioe) {
ioe.printStackTrace();
}
final PrivateKey privateKeyFinal = privateKey;
user.setEnrollment(new Enrollment() {
@Override
public PrivateKey getKey() {
return privateKeyFinal;
}
@Override
public String getCert() {
return signedCert;
}
});
return user;
}
private String extractPemString(String path, String sub){
String pemString = "";
File dir = new File(path + "/" + sub );
if (!dir.exists()){
logger.error("directory is not exist. path:" + dir);
return "";
}
for (File f : dir.listFiles()){
try {
FileInputStream stream = new FileInputStream(f);
pemString = IOUtils.toString(stream, "UTF-8");
return pemString;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return pemString;
}
private static PrivateKey getPrivateKeyFromString(String data)
throws IOException {
final Reader pemReader = new StringReader(data);
final PrivateKeyInfo pemPair;
try (PEMParser pemParser = new PEMParser(pemReader)) {
pemPair = (PrivateKeyInfo) pemParser.readObject();
}
return new JcaPEMKeyConverter().getPrivateKey(pemPair);
}
public boolean invokeBlockchain(String method, String[] args) {
HFClient client = getClient(accessKey);
if (client == null) {
return false;
}
Channel channel = getChannel(accessKey, client);
if (channel == null) {
return false;
}
Collection<ProposalResponse> successful = new LinkedList<>();
Collection<ProposalResponse> failed = new LinkedList<>();
try {
TransactionProposalRequest req = client.newTransactionProposalRequest();
ChaincodeID cid = ChaincodeID.newBuilder().setName(chaincodeName).build();
req.setChaincodeID(cid);
req.setFcn(method);
req.setArgs(args);
Map<String, byte[]> tm2 = new HashMap<>();
tm2.put("HyperLedgerFabric", "TransactionProposalRequest:JavaSDK".getBytes(UTF_8));
tm2.put("method", "TransactionProposalRequest".getBytes(UTF_8));
tm2.put("result", ":)".getBytes(UTF_8)); /// This should be returned see chaincode.
req.setTransientMap(tm2);
Collection<ProposalResponse> resps = channel.sendTransactionProposal(req);
for (ProposalResponse response : resps) {
if (response.getStatus() == ProposalResponse.Status.SUCCESS) {
successful.add(response);
} else {
failed.add(response);
}
}
// Check that all the proposals are consistent with each other. We should have only one set
// where all the proposals above are consistent.
Collection<Set<ProposalResponse>> proposalConsistencySets = SDKUtils.getProposalConsistencySets(resps);
if (proposalConsistencySets.size() != 1) {
logger.error("Expected only one set of consistent proposal responses but got {}: {}" + proposalConsistencySets.size(), args.toString());
return false;
}
if (failed.size() > 0) {
ProposalResponse firstTransactionProposalResponse = failed.iterator().next();
logger.error("Not enough endorsers for {}: {}. endorser error: {}, Was verified: {}", args, failed.size(),
firstTransactionProposalResponse.getMessage(), firstTransactionProposalResponse.isVerified());
return false;
}
BlockEvent.TransactionEvent transactionEvent = channel.sendTransaction(successful).get(30, TimeUnit.SECONDS);
if (transactionEvent.isValid()) {
logger.info("Finished transaction with transaction id {}: {}", transactionEvent.getTransactionID(), args);
return true;
} else {
logger.error("can't commit result: {}", args.toString());
return false;
}
} catch (Exception e) {
String msg = "can't put record to blockchain: " + args;
logger.error(msg, e);
return false;
}
}
public String queryBlockchain(String method, String[] params) {
HFClient client = getClient(accessKey);
if (client == null) {
return "{1}";
}
Channel channel = getChannel(accessKey, client);
if (channel == null) {
return "{2}";
}
try {
QueryByChaincodeRequest queryByChaincodeRequest = client.newQueryProposalRequest();
queryByChaincodeRequest.setArgs(params);
queryByChaincodeRequest.setFcn(method);
queryByChaincodeRequest.setChaincodeID(ChaincodeID.newBuilder().setName(chaincodeName).build());
Map<String, byte[]> tm2 = new HashMap<>();
tm2.put("HyperLedgerFabric", "QueryByChaincodeRequest:JavaSDK".getBytes(UTF_8));
tm2.put("method", "QueryByChaincodeRequest".getBytes(UTF_8));
queryByChaincodeRequest.setTransientMap(tm2);
String payload = null;
Collection<ProposalResponse> queryProposals = channel.queryByChaincode(queryByChaincodeRequest, channel.getPeers());
for (ProposalResponse proposalResponse : queryProposals) {
if (!proposalResponse.isVerified() || proposalResponse.getStatus() != ProposalResponse.Status.SUCCESS) {
logger.error("Failed query proposal from peer " + proposalResponse.getPeer().getName() + " status: " + proposalResponse.getStatus() +
". Messages: " + proposalResponse.getMessage()
+ ". Was verified : " + proposalResponse.isVerified());
} else {
payload = proposalResponse.getProposalResponse().getResponse().getPayload().toStringUtf8();
logger.info("Query payload from peer {} returned {}", proposalResponse.getPeer().getName(), payload);
break;
}
}
return !payload.equals("null") ? payload : "{}";
} catch (Exception e) {
String msg = "can't query record from blockchain. condition: " + accessKey + "," + params;
logger.error(msg);
return "{3}";
}
}
}
39.1.6.5. FabricUser.java
package cn.netkiller.fabric;
import java.util.Set;
import org.hyperledger.fabric.sdk.Enrollment;
import org.hyperledger.fabric.sdk.User;
public class FabricUser implements User {
public void setName(String name) {
this.name = name;
}
protected String name;
protected String enrollSecret;
protected String mspid;
private Set<String> roles;
private String account;
private String affiliation;
private Enrollment enrollment;
public void setEnrollSecret(String enrollSecret) {
this.enrollSecret = enrollSecret;
}
public String getMspid() {
return mspid;
}
public void setMspid(String mspid) {
this.mspid = mspid;
}
public void setRoles(Set<String> roles) {
this.roles = roles;
}
public void setAccount(String account) {
this.account = account;
}
public void setAffiliation(String affiliation) {
this.affiliation = affiliation;
}
public void setEnrollment(Enrollment enrollment) {
this.enrollment = enrollment;
}
public FabricUser(String accessKey) {
this.name = accessKey;
this.mspid = accessKey + "MSP";
}
public String getEnrollSecret() {
return enrollSecret;
}
@Override
public String getName() {
return name;
}
@Override
public Set<String> getRoles() {
return roles;
}
@Override
public String getAccount() {
return account;
}
@Override
public String getAffiliation() {
return affiliation;
}
@Override
public Enrollment getEnrollment() {
return enrollment;
}
public String getMspId() {
return mspid;
}
}
39.1.6.6. Main.java
package cn.netkiller.fabric;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.CountDownLatch;
/**
* run this main method and check result
*/
public class Main {
private static Logger logger = LoggerFactory.getLogger(Main.class);
public static void main(String args[]) throws Exception {
FabricHelper helper = FabricHelper.getInstance();
helper.setConfigCtx("/Users/neo/workspace/fabric-sdk-java/src/main/resources/fixture/config/bcs-whbsxu-sdk-config.yaml");
LoopInvoke(1);
// StartMultiTask(1,1);
}
public static void LoopInvoke(int loop) throws Exception {
FabricHelper helper = FabricHelper.getInstance();
for (int i = 0; i < loop; i++) {
helper.invokeBlockchain("invoke", new String[] { "a", "b", "100" });
String a = helper.queryBlockchain("query", new String[] { "a" });
String b = helper.queryBlockchain("query", new String[] { "b" });
logger.info("after invoke a=" + a + ", invoke b=" + b);
}
}
// StartMultiTask(1, 1);
public static void StartMultiTask(int threadNumber, int loop) throws InterruptedException {
final CountDownLatch countDownLatch = new CountDownLatch(threadNumber);
for (int i = 0; i < threadNumber; i++) {
final int threadID = i;
new Thread() {
public void run() {
try {
LoopInvoke(loop);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
logger.info("threadID:[%s] finished!!", threadID);
countDownLatch.countDown();
}
}.start();
}
countDownLatch.await();
logger.info("main thread finished!!");
}
}
39.1.6.7. 运行结果
2018-09-26 09:58:19,065 WARN [org.hyperledger.fabric.sdk.helper.Config] - Failed to load any configuration from: config.properties. Using toolkit defaults
2018-09-26 09:58:24,254 INFO [cn.netkiller.fabric.FabricHelper] - Finished transaction with transaction id f969f5785acaeab87c8471190ece5231adb54575410293bdcd5f00d227eb24b7: [a, b, 100]
2018-09-26 09:58:24,322 INFO [cn.netkiller.fabric.FabricHelper] - Query payload from peer peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-0.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local returned -500
2018-09-26 09:58:24,386 INFO [cn.netkiller.fabric.FabricHelper] - Query payload from peer peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0-0.peer-23e50b60552eb5b6f32d3c1563305dd4530dc2f0.default.svc.cluster.local returned 800
2018-09-26 09:58:24,386 INFO [cn.netkiller.fabric.Main] - after invoke a=-500, invoke b=800
