Feature Suggestion: Add Fallback Strategy Snippet to Standard Library or README

[worldpeaceenginelabs]

Hi there! 👋

First of all, thank you for creating Trystero—it's an incredibly useful library for building P2P applications with ease! I wanted to suggest a small but impactful improvement.

The Problem

When using multiple strategies (e.g., nostr, torrent, ipfs), it’s common to want a fallback mechanism where the application tries one strategy and, if it fails, automatically falls back to the next one. For example:

1. Try nostr (10-second timeout).
2. If nostr fails, try torrent (10-second timeout).
3. If torrent fails, try ipfs (10-second timeout).
4. If all fail, retry from the beginning.

While this is achievable with custom code, it’s a common enough use case that it could be beneficial to include it as a standard feature in the library or at least as a snippet in the README.

Proposed Solution

I’d like to suggest one of the following:

1. Add a Built-in Fallback Mechanism: Introduce a new utility function (e.g., joinRoomWithFallback) that accepts an array of strategies and their configurations, and automatically handles the fallback logic.
2. Include a Snippet in the README: Add a well-documented code snippet to the README that demonstrates how to implement fallback strategies using the existing joinRoom functions.

Here’s an example of what the snippet could look like:

import { joinRoom as joinRoomNostr } from '@trystero/nostr';
import { joinRoom as joinRoomTorrent } from '@trystero/torrent';
import { joinRoom as joinRoomIPFS } from '@trystero/ipfs';

const config = {
  roomName: 'my-room-name', // Replace with your room name
};

async function connectWithStrategy(strategy) {
  try {
    let joinRoom;
    switch (strategy) {
      case 'nostr':
        joinRoom = joinRoomNostr;
        break;
      case 'torrent':
        joinRoom = joinRoomTorrent;
        break;
      case 'ipfs':
        joinRoom = joinRoomIPFS;
        break;
      default:
        throw new Error(`Unknown strategy: ${strategy}`);
    }

    console.log(`Attempting connection with ${strategy} strategy...`);
    const room = await Promise.race([
      joinRoom(config.roomName),
      new Promise((_, reject) => setTimeout(() => reject(new Error('Timeout')), 10000)),
    ]);
    console.log(`${strategy} connection successfully established`);
    return { success: true, room, strategy };
  } catch (error) {
    console.warn(`${strategy} connection failed: ${error.message}`);
    return { success: false, error };
  }
}

async function connectWithFallbacks() {
  const strategies = ['nostr', 'torrent', 'ipfs']; // Strategy order
  let currentStrategyIndex = 0;
  while (true) {
    const strategy = strategies[currentStrategyIndex];
    const result = await connectWithStrategy(strategy);
    if (result.success) {
      return result;
    }
    currentStrategyIndex = (currentStrategyIndex + 1) % strategies.length;
  }
}

// Usage
connectWithFallbacks()
  .then(({ room, strategy }) => {
    console.log(`Connected with strategy: ${strategy}`);
    // Use the room object for P2P communication
  })
  .catch((error) => {
    console.error('All strategies failed:', error);
  });

Why This Would Be Helpful

• Improved Developer Experience: Many developers will likely need fallback logic when working with multiple strategies. Providing a standard implementation would save time and reduce boilerplate.
• Better Documentation: Including this snippet in the README would make it easier for new users to understand how to handle strategy fallbacks.
• Consistency: A built-in fallback mechanism would ensure consistent behavior across applications using Trystero.

Next Steps

I’d be happy to contribute this snippet to the README or implementation of a built-in fallback mechanism if this aligns with the project’s goals. Let me know your thoughts!

Thanks for considering this suggestion! 🚀