Code Sampling

CIA.com Web3 Email Marketplace Technical Documentation

Overview

The CIA.com Web3 Email Marketplace is designed to integrate web3 and web2 technologies, providing users with a seamless and innovative experience. Traditional web2-based emails will be transformed into NFTs, with each email linked to a blockchain wallet. This integration is facilitated by a MongoDB database, which manages wallet-to-email matching and stores various data points, including NFT activity, expiration dates, renewal dates, ownership information, transfer details, and marketplace pricing. The database also automates email operations such as creation, suspension, and deletion, utilizing APIs built on a cloud server hosting our email client, Zimbra Enterprise, modified for wallet authentication instead of traditional passwords.

Front-End Development

The front-end of the Web3 marketplace will be built using Next.js, configured with TypeScript for type safety and robust development. The development environment will leverage ESLint and Prettier to enforce code quality and consistency. Dynamic routing will be implemented for email detail pages using Next.js’ file-based routing system. The Next.js API routes will handle various Web3 email operations, enabling efficient server-side processing.

// next.config.js
module.exports = {
  reactStrictMode: true,
  webpack: (config) => {
    config.resolve.alias['@'] = path.join(__dirname, 'src');
    return config;
  },
};

// pages/_app.tsx
import { AppProps } from 'next/app';
import '../styles/globals.css';

function MyApp({ Component, pageProps }: AppProps) {
  return <Component {...pageProps} />;
}

export default MyApp;

Back-End Development

The backend will utilize Node.js and NestJS, a progressive Node.js framework for building efficient and scalable server-side applications. MongoDB will serve as the database for managing wallet-to-email matching and storing NFT activity data. The smart contracts, developed using Solidity, will handle the minting, transferring, and management of Web3 emails. These contracts will follow the ERC-721 standard for NFTs and operate on multiple blockchains, including Ethereum, Binance Smart Chain, and Avalanche.

// nest-cli.json
{
  "collection": "@nestjs/schematics",
  "sourceRoot": "src"
}

// src/app.module.ts
import { Module } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm';
import { UsersModule } from './users/users.module';

@Module({
  imports: [TypeOrmModule.forRoot(), UsersModule],
})
export class AppModule {}

// src/main.ts
import { NestFactory } from '@nestjs/core';
import { AppModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);
  await app.listen(3000);
}
bootstrap();

Smart contracts will be deployed using Truffle or Hardhat, with scripts for deployment and interaction. These smart contracts will be thoroughly tested using frameworks like Mocha and Chai to ensure their reliability.

// contracts/NFTEmail.sol
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

contract NFTEmail is ERC721 {
    uint256 public nextTokenId;
    address public admin;

    constructor() ERC721('NFTEmail', 'EMAIL') {
        admin = msg.sender;
    }

    function mint(address to) external {
        require(msg.sender == admin, 'only admin can mint');
        _safeMint(to, nextTokenId);
        nextTokenId++;
    }

    function _baseURI() internal view virtual override returns (string memory) {
        return "https://api.cia.com/metadata/";
    }
}

Admin Panel

The admin panel, responsible for controlling the email structure, will also be built using Next.js for the UI and NestJS for the backend, with MongoDB for data storage. The web2 infrastructure will be deployed on Google Cloud instances, featuring multi-layer backups and Cloudflare Enterprise for CDN. The admin panel will allow dynamic routing for email detail pages and will handle email management tasks via a user-friendly interface.

// pages/admin/index.tsx
import { useState } from 'react';
import axios from 'axios';

const AdminDashboard = () => {
  const [emails, setEmails] = useState([]);

  const fetchEmails = async () => {
    const response = await axios.get('/api/emails');
    setEmails(response.data);
  };

  return (
    <div>
      <h1>Admin Dashboard</h1>
      <button onClick={fetchEmails}>Fetch Emails</button>
      <ul>
        {emails.map(email => (
          <li key={email.id}>{email.address}</li>
        ))}
      </ul>
    </div>
  );
};

export default AdminDashboard;

Web3 Integration

For web3 integration, Ether.js and WalletConnect will be incorporated into the front-end application to facilitate blockchain interactions. Users will be able to connect their wallets, sign transactions, and interact with smart contracts through a streamlined wallet connection flow in the UI.

// src/pages/index.tsx
import { ethers } from 'ethers';
import WalletConnectProvider from "@walletconnect/web3-provider";

const provider = new WalletConnectProvider({
  infuraId: "INFURA_PROJECT_ID"
});

const connectWallet = async () => {
  await provider.enable();
  const web3Provider = new ethers.providers.Web3Provider(provider);
  const signer = web3Provider.getSigner();
  console.log(await signer.getAddress());
};

connectWallet();

Testing and Security

Testing will be conducted on testnets to simulate real-world scenarios, ensuring contract interactions work as expected. The entire codebase will undergo extensive security audits by third-party firms. Upon passing these audits, Continuous Integration and Continuous Deployment (CI/CD) pipelines will be set up using tools like GitHub Actions, Jenkins, or GitLab CI, automating the testing, building, and deployment processes.

# .github/workflows/ci.yml
name: CI

on:
  push:
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
      - name: Set up Node.js
        uses: actions/setup-node@v2
        with:
          node-version: '14'
      - name: Install dependencies
        run: npm install
      - name: Run tests
        run: npm test

Final checks and audits of smart contracts will be performed before deploying contracts on the mainnet environments for Ethereum, Binance Smart Chain, and Avalanche.

Monitoring and Optimization

Monitoring tools like Prometheus, Grafana, or New Relic will be implemented to oversee the system’s health. Centralized logging will be established using the ELK Stack or Loggly. Error tracking and performance monitoring will be managed using tools like Sentry or Rollbar, ensuring continuous optimization of the application’s performance.

# prometheus.yml
global:
  scrape_interval: 15s

scrape_configs:
  - job_name: 'node'
    static_configs:
      - targets: ['localhost:9090']

# grafana.ini
[auth.anonymous]
enabled = true

[server]
http_addr = "0.0.0.0"
http_port = 3000

This comprehensive approach ensures a robust, secure, and efficient platform for the NFT email marketplace, combining the strengths of both web2 and web3 technologies.