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做网站公司名字,网站seo优化总结,网站为什么需要备案,微信做网站的公司一.检查配置环境检查虚拟机环境，确保有正在运行的Hyperledger Fabric区块链，并且其中chaincode_basic、credit_chaincode链码可以正常调用查看chaincode_basic、credit_chaincode链码调用二.开发征信链码代码基于现有征信链码，开发征信…

一.检查配置环境

检查虚拟机环境，确保有正在运行的Hyperledger Fabric区块链，并且其中chaincode_basic、credit_chaincode链码可以正常调用

查看chaincode_basic、credit_chaincode链码调用

二.开发征信链码代码

基于现有征信链码，开发征信链码的升级版，使用chaincode-init文件夹中的基础链码模板，创建完善其中lib目录以及index.js内容，在lib中创建CreditPlusContract对象，在对象中添加createCreditSubjectPlus功能，实现征信主体的保存，定义subject变量属性包括（key:征信主体主键, organizationName：征信主体评价机构名, type：评价类型，score：征信积分，creator：创建人，datetime：评价时间），其中属性除score外其余都为string类型。将subject内容上链保存

在链码中添加征信主体查询功能（queryCreditSubjectPlus），要求能够查询所有主体内容（包括：key:征信主体主键, organizationName：征信主体评价机构名, type：评价类型，score：征信积分，creator：创建人，datetime：评价时间）

'use strict';
const { Contract } = require("fabric-contract-api");
class CreditPlusContract extends Contract {async createCreditSubjectPlus(ctx, key, organizationName, type, creator, datetime) {console.info('=== START:创建征信主体 ===');const subject = {key: key,organizationName: organizationName,type: type,score: 0,creator: creator,datetime: datetime};await ctx.stub.putState(key, Buffer.from(JSON.stringify(subject)));console.info('=== END:创建征信主体 ===');return subject;}// 查询征信主体async queryCreditSubjectPlus(ctx, subjectKey) {console.info('=== START : 查询征信主体 ===');const bytes = await ctx.stub.getState(subjectKey);if (!bytes || bytes.length === 0) {const msg = `${subjectKey} 征信主体不存在`;console.warn(msg);throw new Error(msg);}const subject = JSON.parse(bytes.toString());console.info('=== END : 查询征信主体 ===');return subject;}}module.exports = CreditPlusContract;

在链码结构中test目录中添加对于createCreditSubjectPlus以及QueryCreditSubjectPlus功能的单元测试，提交测试代码和验证结果。

'use strict';
const sinon = require('sinon');
const chai = require('chai');
const sinonChai = require('sinon-chai');
const expect = chai.expect;
chai.use(sinonChai);
let assert = sinon.assert;
const { Context } = require('fabric-contract-api');
const { ChaincodeStub, ClientIdentity } = require('fabric-shim');
const CreditPlusContract = require('../lib/creditContract');
describe('Credit Chaincode Test', () => {let stub, ctx, ClientId;beforeEach(() => {ctx = new Context();stub = sinon.createStubInstance(ChaincodeStub);stub.getMspID.returns('Org1');ctx.setChaincodeStub(stub);ClientId = sinon.createStubInstance(ClientIdentity);stub.putState.callsFake((key, value) => {if (!stub.states) {stub.states = {};}stub.states[key] = value;});stub.getState.callsFake(async (key) => {let ret;if (stub.states) {ret = stub.states[key];}return Promise.resolve(ret);});stub.deleteState.callsFake(async (key) => {if (stub.states) {delete stub.states[key];}});});describe('Test CreditSubject function', () => {it('should return success on createCreditSubject', async () => {let creditContract = new CreditPlusContract();let creditSubject = await creditContract.createCreditSubjectPlus(ctx, "A001", "My Company", "Company","Admin","2024-05-28 14:35:00");let scroe = creditSubject.score;expect(scroe).to.equals(0);});it('should return success on queryCreditSubject', async () => {let creditContract = new CreditPlusContract();await creditContract.createCreditSubjectPlus(ctx, "A001", "My Company", "Company", "Admin", "2024-05-28 14:35:00");let creditSubject = await creditContract.queryCreditSubjectPlus(ctx, "A001");let name = creditSubject.organizationName;expect(name).to.equals("My Company");});});
})

测试代码:

三.部署征信链码

在虚拟机指定Hyperledger Fabric中实现对应链码的部署并验证部署情况。

将链码名修改切credit_chaincode_plus，删除node_modules目录以及对应package-lock.json文件，上传至服务器chaincode目录下：

打包测试:

export FABRIC_CFG_PATH=${PWD}/configpeer lifecycle chaincode package ./chaincode/credit_chaincode_plus.tar.gz --path ./chaincode/credit_chaincode_plus --lang node --label credit_chaincode_plus_1.0

查看打包结果:

安装链码：运行以下进入fabric-cli容器：

docker exec -it fabric-cli bash

1. 在org1中安装：运行以下链码安装：

. scripts/set-env.sh 1 0 7051
peer lifecycle chaincode install chaincode/credit_chaincode_plus.tar.gz

2. 在org2中安装，运行以下链码安装：

. scripts/set-env.sh 2 0 9051
peer lifecycle chaincode install chaincode/credit_chaincode_plus.tar.gz

3. 查看安装情况

peer lifecycle chaincode queryinstalled

批准链码
org1批准链码

1. 设置链码环境变量

export CC_PACKAGE_ID=credit_chaincode_plus_1.0:9415a0be8812a91c2e510619a4d2a6a5cd06a8cf8f9cef96ee4eec2f456ab7ec

2. 设置Org1环境变量

. scripts/set-env.sh 1 0 7051

3.批准链码

peer lifecycle chaincode approveformyorg -o orderer.example.com:7050 --ordererTLSHostnameOverride orderer.example.com --channelID $CHANNEL_NAME --name credit_chaincode_plus --version 1.0 --package-id $CC_PACKAGE_ID --sequence 1 --tls --cafile $ORDERER_CA

1. 设置Org2环境变量

. scripts/set-env.sh 2 0 9051

2.批准链码

peer lifecycle chaincode approveformyorg -o orderer.example.com:7050 --ordererTLSHostnameOverride orderer.example.com --channelID $CHANNEL_NAME --name credit_chaincode_plus --version 1.0 --package-id $CC_PACKAGE_ID --sequence 1 --tls --cafile $ORDERER_CA

检查提交准备

peer lifecycle chaincode checkcommitreadiness --channelID $CHANNEL_NAME --name credit_chaincode_plus --version 1.0 --sequence 1 --tls --cafile $ORDERER_CA --output json

提交链码

peer lifecycle chaincode commit -o orderer.example.com:7050 --ordererTLSHostnameOverride orderer.example.com --channelID $CHANNEL_NAME --name credit_chaincode_plus --version 1.0 --sequence 1 --tls --cafile $ORDERER_CA --peerAddresses peer0.org1.example.com:7051 --tlsRootCertFiles $PEER0_ORG1_CA --peerAddresses peer0.org2.example.com:9051 --tlsRootCertFiles $PEER0_ORG2_CA

查询提交的链码

peer lifecycle chaincode querycommitted --channelID $CHANNEL_NAME --name credit_chaincode_plus --tls --cafile $ORDERER_CA

查看运行镜像形成容器情况

docker logs -f b1ddd21303a5

调用createCreditSubject功能

peer chaincode invoke -o orderer.example.com:7050 --tls --cafile $ORDERER_CA --channelID $CHANNEL_NAME --name credit_chaincode_plus --peerAddresses peer0.org1.example.com:7051 --tlsRootCertFiles $PEER0_ORG1_CA --peerAddresses peer0.org2.example.com:9051 --tlsRootCertFiles $PEER0_ORG2_CA -c '{"function":"createCreditSubjectPlus", "Args":["A001", "My Company", "Company","Admin","2024-05-28 14:35:00"]}'

调用queryCreditSubject功能

peer chaincode query -C $CHANNEL_NAME --name credit_chaincode_plus -c '{"function":"queryCreditSubjectPlus","Args":["A001"]}'

四.部署删除和更新代码

在链码中添加DeleteCreditSubject，实现按subject变量的key属性删除数据功能

在链码中添加UpdateSubjectScore功能，实现按key更新subject，更新subject变量中的score

'use strict';const { Contract } = require("fabric-contract-api");class CreditPlusContract extends Contract {async createCreditSubjectPlus(ctx, key, organizationName, type, creator, datetime) {console.info('=== START:创建征信主体 ===');const subject = {key: key,organizationName: organizationName,type: type,score: 0,creator: creator,datetime: datetime};await ctx.stub.putState(key, Buffer.from(JSON.stringify(subject)));console.info('=== END:创建征信主体 ===');return subject;}// 查询征信主体async queryCreditSubjectPlus(ctx, subjectKey) {console.info('=== START : 查询征信主体 ===');const bytes = await ctx.stub.getState(subjectKey);if (!bytes || bytes.length === 0) {const msg = `${subjectKey} 征信主体不存在`;console.warn(msg);throw new Error(msg);}const subject = JSON.parse(bytes.toString());console.info('=== END : 查询征信主体 ===');return subject;}async deleteCreditSubject(ctx, id) {const exists = await this.creditSubjectExists(ctx, id);if (!exists) {throw new Error(`The asset ${id} does not exist`);}return ctx.stub.deleteState(id);}async creditSubjectExists(ctx, id) {const assetJSON = await ctx.stub.getState(id);return assetJSON && assetJSON.length > 0;}async updateSubjectScore(ctx,subjectKey,inputScore) {const exists = await this.creditSubjectExists(ctx,subjectKey);if (!exists) {throw new Error(`The credit subject ${subjectKey} does not exist`);}const bytes = await ctx.stub.getState(subjectKey);if (!bytes || bytes.length ===0){const msg = `${subjectKey} 征信主体不存在`;console.warn(msg)throw new Error (msg);}var subject = JSON.parse(bytes.toString());subject.score=inputScore;return ctx.stub.putState(subjectKey, Buffer.from(JSON.stringify(subject)));}}module.exports = CreditPlusContract;

在链码结构中test目录中添加对于DeleteCreditSubject以及UpdateSubjectScore功能的单元测试

'use strict';
const sinon = require('sinon');
const chai = require('chai');
const sinonChai = require('sinon-chai');
const expect = chai.expect;
chai.use(sinonChai);
let assert = sinon.assert;
const { Context } = require('fabric-contract-api');
const { ChaincodeStub, ClientIdentity } = require('fabric-shim');
const CreditPlusContract = require('../lib/creditContract');
describe('Credit Chaincode Test', () => {let stub, ctx, ClientId;beforeEach(() => {ctx = new Context();stub = sinon.createStubInstance(ChaincodeStub);stub.getMspID.returns('Org1');ctx.setChaincodeStub(stub);ClientId = sinon.createStubInstance(ClientIdentity);stub.putState.callsFake((key, value) => {if (!stub.states) {stub.states = {};}stub.states[key] = value;});stub.getState.callsFake(async (key) => {let ret;if (stub.states) {ret = stub.states[key];}return Promise.resolve(ret);});stub.deleteState.callsFake(async (key) => {if (stub.states) {delete stub.states[key];}});});describe('Test CreditSubject function', () => {it('should return success on createCreditSubject', async () => {let creditContract = new CreditPlusContract();let creditSubject = await creditContract.createCreditSubjectPlus(ctx, "A001", "My Company", "Company","Admin","2024-05-28 14:35:00");let scroe = creditSubject.score;expect(scroe).to.equals(0);});it('should return success on queryCreditSubject', async () => {let creditContract = new CreditPlusContract();await creditContract.createCreditSubjectPlus(ctx, "A001", "My Company", "Company", "Admin", "2024-05-28 14:35:00");let creditSubject = await creditContract.queryCreditSubjectPlus(ctx, "A001");let name = creditSubject.organizationName;expect(name).to.equals("My Company");});it('should return sucess on DeleteCreditSubject', async () => {let creditContract = new CreditPlusContract();await creditContract.createCreditSubjectPlus(ctx, "A001", "My Company", "Company", "Admin", "2024-05-28 14:35:00");await creditContract.deleteCreditSubject(ctx,"A001");let ret = await stub.getState('A001');expect(ret).to.equal(undefined);});it('should return sucess on updateSubjectScore', async () => {let creditContract = new CreditPlusContract();await creditContract.createCreditSubjectPlus(ctx, "A001", "My Company", "Company", "Admin", "2024-05-28 14:35:00");await creditContract.updateSubjectScore(ctx, "A001",10);let ret = JSON.parse(await stub.getState('A001'));expect(ret.score).to.eql(10);});});
})

测试代码:

五.更新部署征信链码

在链码中重新部署开发链码，实现链码更新（要求version、sequence有迭代痕迹）

打包测试:

export FABRIC_CFG_PATH=${PWD}/configpeer lifecycle chaincode package ./chaincode/credit_chaincode_plus.tar.gz --path ./chaincode/credit_chaincode_plus --lang node --label credit_chaincode_plus_1.1

安装链码
运行以下进入fabric-cli容器：

docker exec -it fabric-cli bash

1. 在org1中安装 | 运行以下链码安装：

. scripts/set-env.sh 1 0 7051

peer lifecycle chaincode install chaincode/credit_chaincode_plus.tar.gz

2. 在org2中安装
运行以下链码安装：

. scripts/set-env.sh 2 0 9051

peer lifecycle chaincode install chaincode/credit_chaincode_plus.tar.gz