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Simon Stone
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[FAB-12851] Add fabcar contract w/ new prog model (JS)
Add new FabCar contract sample using the new programming model, written in JavaScript. Add the new contract sample alongside the existing one written in the old programming model, which will be removed in a subsequent change request. Change-Id: Iea46b0a616dbd072b5bd7227ada827a26560f153 Signed-off-by: Simon Stone <sstone1@uk.ibm.com>
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‎chaincode/fabcar/javascript/.editorconfig

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#
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# SPDX-License-Identifier: Apache-2.0
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#
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root = true
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[*]
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indent_style = space
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indent_size = 4
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end_of_line = lf
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charset = utf-8
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trim_trailing_whitespace = true
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insert_final_newline = true
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[*.md]
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trim_trailing_whitespace = false

‎chaincode/fabcar/javascript/.eslintignore

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#
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# SPDX-License-Identifier: Apache-2.0
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#
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coverage

‎chaincode/fabcar/javascript/.eslintrc.js

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/*
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* SPDX-License-Identifier: Apache-2.0
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*/
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module.exports = {
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env: {
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node: true,
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mocha: true
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},
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parserOptions: {
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ecmaVersion: 8,
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sourceType: 'script'
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},
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extends: "eslint:recommended",
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rules: {
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indent: ['error', 4],
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'linebreak-style': ['error', 'unix'],
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quotes: ['error', 'single'],
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semi: ['error', 'always'],
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'no-unused-vars': ['error', { args: 'none' }],
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'no-console': 'off',
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curly: 'error',
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eqeqeq: 'error',
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'no-throw-literal': 'error',
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strict: 'error',
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'no-var': 'error',
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'dot-notation': 'error',
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'no-tabs': 'error',
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'no-trailing-spaces': 'error',
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'no-use-before-define': 'error',
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'no-useless-call': 'error',
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'no-with': 'error',
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'operator-linebreak': 'error',
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yoda: 'error',
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'quote-props': ['error', 'as-needed'],
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'no-constant-condition': ["error", { "checkLoops": false }]
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}
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};

‎chaincode/fabcar/javascript/.gitignore

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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# Logs
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logs
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*.log
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npm-debug.log*
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yarn-debug.log*
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yarn-error.log*
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# Runtime data
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pids
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*.pid
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*.seed
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*.pid.lock
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# Directory for instrumented libs generated by jscoverage/JSCover
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lib-cov
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# Coverage directory used by tools like istanbul
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coverage
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# nyc test coverage
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.nyc_output
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# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
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.grunt
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# Bower dependency directory (https://bower.io/)
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bower_components
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# node-waf configuration
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.lock-wscript
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# Compiled binary addons (https://nodejs.org/api/addons.html)
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build/Release
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# Dependency directories
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node_modules/
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jspm_packages/
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# TypeScript v1 declaration files
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typings/
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# Optional npm cache directory
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.npm
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# Optional eslint cache
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.eslintcache
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# Optional REPL history
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.node_repl_history
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# Output of 'npm pack'
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*.tgz
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# Yarn Integrity file
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.yarn-integrity
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# dotenv environment variables file
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.env
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# parcel-bundler cache (https://parceljs.org/)
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.cache
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# next.js build output
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.next
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# nuxt.js build output
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.nuxt
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# vuepress build output
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.vuepress/dist
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# Serverless directories
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.serverless

‎chaincode/fabcar/javascript/index.js

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/*
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* SPDX-License-Identifier: Apache-2.0
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*/
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'use strict';
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const FabCar = require('./lib/fabcar');
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module.exports.FabCar = FabCar;
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module.exports.contracts = [ FabCar ];

‎chaincode/fabcar/javascript/lib/fabcar.js

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/*
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* SPDX-License-Identifier: Apache-2.0
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*/
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'use strict';
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const { Contract } = require('fabric-contract-api');
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class FabCar extends Contract {
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async initLedger(ctx) {
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console.info('============= START : Initialize Ledger ===========');
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const cars = [
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{
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color: 'blue',
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make: 'Toyota',
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model: 'Prius',
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owner: 'Tomoko',
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},
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{
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color: 'red',
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make: 'Ford',
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model: 'Mustang',
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owner: 'Brad',
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},
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{
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color: 'green',
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make: 'Hyundai',
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model: 'Tucson',
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owner: 'Jin Soo',
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},
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{
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color: 'yellow',
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make: 'Volkswagen',
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model: 'Passat',
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owner: 'Max',
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},
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{
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color: 'black',
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make: 'Tesla',
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model: 'S',
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owner: 'Adriana',
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},
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{
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color: 'purple',
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make: 'Peugeot',
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model: '205',
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owner: 'Michel',
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},
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{
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color: 'white',
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make: 'Chery',
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model: 'S22L',
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owner: 'Aarav',
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},
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{
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color: 'violet',
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make: 'Fiat',
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model: 'Punto',
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owner: 'Pari',
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},
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{
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color: 'indigo',
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make: 'Tata',
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model: 'Nano',
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owner: 'Valeria',
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},
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{
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color: 'brown',
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make: 'Holden',
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model: 'Barina',
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owner: 'Shotaro',
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},
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];
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for (let i = 0; i < cars.length; i++) {
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cars[i].docType = 'car';
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await ctx.stub.putState('CAR' + i, Buffer.from(JSON.stringify(cars[i])));
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console.info('Added <--> ', cars[i]);
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}
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console.info('============= END : Initialize Ledger ===========');
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}
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async queryCar(ctx, carNumber) {
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const carAsBytes = await ctx.stub.getState(carNumber); // get the car from chaincode state
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if (!carAsBytes || carAsBytes.length === 0) {
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throw new Error(`${carNumber} does not exist`);
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}
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console.log(carAsBytes.toString());
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return carAsBytes.toString();
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}
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async createCar(ctx, carNumber, make, model, color, owner) {
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console.info('============= START : Create Car ===========');
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const car = {
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color,
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docType: 'car',
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make,
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model,
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owner,
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};
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await ctx.stub.putState(carNumber, Buffer.from(JSON.stringify(car)));
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console.info('============= END : Create Car ===========');
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}
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async queryAllCars(ctx) {
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const startKey = 'CAR0';
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const endKey = 'CAR999';
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const iterator = await ctx.stub.getStateByRange(startKey, endKey);
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const allResults = [];
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while (true) {
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const res = await iterator.next();
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if (res.value && res.value.value.toString()) {
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console.log(res.value.value.toString('utf8'));
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const Key = res.value.key;
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let Record;
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try {
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Record = JSON.parse(res.value.value.toString('utf8'));
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} catch (err) {
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console.log(err);
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Record = res.value.value.toString('utf8');
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}
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allResults.push({ Key, Record });
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}
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if (res.done) {
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console.log('end of data');
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await iterator.close();
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console.info(allResults);
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return JSON.stringify(allResults);
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}
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}
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}
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async changeCarOwner(ctx, carNumber, newOwner) {
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console.info('============= START : changeCarOwner ===========');
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const carAsBytes = await ctx.stub.getState(carNumber); // get the car from chaincode state
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if (!carAsBytes || carAsBytes.length === 0) {
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throw new Error(`${carNumber} does not exist`);
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}
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const car = JSON.parse(carAsBytes.toString());
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car.owner = newOwner;
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await ctx.stub.putState(carNumber, Buffer.from(JSON.stringify(car)));
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console.info('============= END : changeCarOwner ===========');
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}
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}
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module.exports = FabCar;

‎chaincode/fabcar/javascript/package.json

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{
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"name": "fabcar",
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"version": "1.0.0",
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"description": "FabCar contract implemented in JavaScript",
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"main": "index.js",
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"engines": {
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"node": ">=8",
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"npm": ">=5"
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},
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"scripts": {
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"lint": "eslint .",
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"pretest": "npm run lint",
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"test": "nyc mocha --recursive",
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"start": "fabric-chaincode-node start"
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},
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"engineStrict": true,
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"author": "Hyperledger",
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"license": "Apache-2.0",
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"dependencies": {
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"fabric-contract-api": "1.4.0-beta",
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"fabric-shim": "1.4.0-beta"
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},
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"devDependencies": {
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"chai": "^4.1.2",
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"eslint": "^4.19.1",
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"mocha": "^5.2.0",
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"nyc": "^12.0.2",
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"sinon": "^6.0.0",
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"sinon-chai": "^3.2.0"
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},
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"nyc": {
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"exclude": [
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"coverage/**",
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"test/**"
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],
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"reporter": [
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"text-summary",
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"html"
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],
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"all": true,
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"check-coverage": true,
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"statements": 100,
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"branches": 100,
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"functions": 100,
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"lines": 100
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}
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}

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