💡 [REQUEST] - Improve serverless (especially CloudFlare) support

[ifavo]

Summary

My personal setup involves CloudFlare Workers a lot to create APIs or Vechain interaction with a very low effort. To enable transaction building with connex I have a stripped version of the thor-devkit that runs in node_compat (NodeJS compatibility) mode.

I would like to use the SDK within CloudFlare Workers in compatibility mode as well without creating a stripped version to:

1. Build transaction objects
2. Sign transactions
3. Interact with the Node-APIs

Ideas to create the compatibility are:

1. Use global fetch or allow injection of fetch function
2. Dynamically import modules, like events on demand instead

Basic Example

1. Create a new CloudFlare Worker using npx wrangler generate sdk-cf
2. Add @vechain/sdk-network to it using npm install --save @vechain/sdk-network @vechain/sdk-core
3. Create a thor client in the worker using ThorClient.fromUrl('https://testnet.vechain.org')
4. Test the Worker by using wrangler dev or if you have a CloudFlare account use wrangler deploy
   • It will fail to start.
   • Optimal Results would be a CloudFlare Worker that can use the SDK instantly without enable Node Compatibility in the next step.
5. Add node_compat = true to the wrangler.toml to enable NodeJS compatibility
6. Test the Worker by using wrangler dev or if you have a CloudFlare account use wrangler deploy

Using this simplified index.ts:

import { ThorClient } from "@vechain/sdk-network";
export default {
	async fetch(
	): Promise<Response> {
		const thor = ThorClient.fromUrl('https://testnet.vechain.org')
		const block = await thor.blocks.getBestBlockRef()
		return new Response(block);
	},
};