Payword on Typescript

It uses npm, TypeScript compiler, Jest, webpack, ESLint, Prettier, husky, pinst, commitlint. The production files include CommonJS, ES Modules, UMD version and TypeScript declaration files.

Using the library

npm i payword-ts node-forge

npm i --save-dev @types/node-forge

Node

import { UserCertification, UserCertificationSigned, generateUserCertification, hash, verifyUserCertificationSigned } from 'paywordts'
import dotenv from 'dotenv'
import { pki } from 'node-forge'

dotenv.config()
const brokerPrivateKey = pki.privateKeyFromPem(
    process.env['BROKER_PRIVATE_KEY'] ?? ''
)
const brokerPublicKey = pki.publicKeyFromPem(
    process.env['BROKER_PUBLIC_KEY'] ?? ''
)
const userPrivateKey = pki.privateKeyFromPem(
    process.env['USER_PRIVATE_KEY'] ?? ''
)
const userPublicKey = pki.publicKeyFromPem(process.env['USER_PUBLIC_KEY'] ?? '')

const userCertification: UserCertification = {
    brokerId: 'brokerId',
    userId: 'userId',
    vendorId: 'vendorId',
    expirationDate: 123321,
    toAddress: 'toAddress',
    userPubKey: userPublicKey,
}

const userCertificationSigned: UserCertificationSigned =
    generateUserCertification(userCertification, brokerPrivateKey)

const isValid: boolean = verifyUserCertificationSigned(
    userCertificationSigned,
    brokerPublicKey
)

console.log(isValid)

React ( Vite )

import {
  UserCertification,
  UserCertificationSigned,
  UserMessage,
  UserMessageSigned,
  generateUserCertification,
  generateUserMessageSigned,
  getHashChainArrayByMessage,
} from "paywordts";
import "./App.css";
import { pki } from "node-forge";

const brokerPrivateKey = pki.privateKeyFromPem(
  import.meta.env.VITE_BROKER_PRIVATE_KEY ?? ""
);

const userPrivateKey = pki.privateKeyFromPem(
  import.meta.env.VITE_USER_PRIVATE_KEY ?? ""
);
const userPublicKey = pki.publicKeyFromPem(
  import.meta.env.VITE_USER_PUBLIC_KEY ?? ""
);

function App() {
  const userCertification: UserCertification = {
    brokerId: "brokerId",
    userId: "userId",
    vendorId: "vendorId",
    expirationDate: 123321,
    toAddress: "toAddress",
    userPubKey: userPublicKey,
  };

  const userCertificationSigned: UserCertificationSigned =
    generateUserCertification(userCertification, brokerPrivateKey);

  const h0: string = "hashzero";
  const n = 100;
  const hashArray: string[] = getHashChainArrayByMessage(h0, n);
  const hn: string = hashArray[n] ?? "";

  const userMessage: UserMessage = {
    expirationDate: 1010,
    hn,
    n,
    userCertificationSigned,
    vendorId: "vendorId",
  };

  const userMessageSigned: UserMessageSigned = generateUserMessageSigned(
    userPrivateKey,
    userMessage
  );
  return <>{JSON.stringify(userMessageSigned)}</>;
}

export default App;

Development from source

The source code is avaliable at our repository

Set up tools and environment

You need to have Node.js installed. Node includes npm as its default package manager.

Open the whole package folder with a good code editor, preferably Visual Studio Code. Consider installing VS Code extensions ES Lint and Prettier.

In the VS Code top menu: Terminal -> New Terminal

Install dependencies

Install dependencies with npm:

npm i

Test

Test your code with Jest framework:

npm run test

Note: Example TypeScript Package uses husky, pinst and commitlint to automatically execute test and lint commit message before every commit.

Build

Build production (distribution) files in your dist folder:

npm run build

It generates CommonJS (in dist/cjs folder), ES Modules (in dist/esm folder), bundled and minified UMD (in dist/umd folder), as well as TypeScript declaration files (in dist/types folder).

Try it before publishing

Run:

npm link

npm link will create a symlink in the global folder, which may be {prefix}/lib/node_modules/example-typescript-package or C:\Users<username>\AppData\Roaming\npm\node_modules\example-typescript-package.

Create an empty folder elsewhere, you don't even need to npm init (to generate package.json). Open the folder with VS Code, open a terminal and just run:

npm link example-typescript-package

This will create a symbolic link from globally-installed example-typescript-package to node_modules/ of the current folder.

You can then create a, for example, testnum.ts file with the content:

import { Num } from 'example-typescript-package'
console.log(new Num(5).add(new Num(6)).val() === 11)

If you don't see any linting errors in VS Code, if you put your mouse cursor over Num and see its type, then it's all good.

Whenever you want to uninstall the globally-installed example-typescript-package and remove the symlink in the global folder, run:

npm uninstall example-typescript-package -g

References

• Creating and publishing unscoped public packages - npm docs
• npm-publish - npm docs
• Publishing - TypeScript docs
• Publishing Node.js packages - GitHub Docs

Btw, if you want to publish Python package, go to Example PyPI (Python Package Index) Package & Tutorial / Instruction / Workflow for 2021.