Here is an article that explores whether web3.py can be used with AWS Lambda:

Metamask: Can web3.py be used from a server like AWS Lambda?

When building a decentralized application (DApp) using Web3.js, you often need to perform blockchain computations or interact with external services. However, implementing these computations in a production environment can be challenging due to security limitations and performance issues.

One solution that has recently become popular is Metamask, a layer 2 scaling solution for Ethereum that provides a more secure way to interact with the Ethereum blockchain. But can web3.py, the popular Python library for Web3.js, be used from AWS Lambda?

In this article, we will explore how Metamask and web3.py can coexist on an AWS Lambda server.

Background

Before we dive into the question, here’s a quick summary of what you need to know:

• AWS Lambda: A serverless computing platform that allows you to run code without building or managing servers.

• Metamask: A layer 2 scaling solution for Ethereum that provides a more secure way to interact with the Ethereum blockchain.

• web3.py: A Python library for Web3.js that allows us to interact with the Ethereum blockchain.

Can we use Metamask with AWS Lambda?

To answer this question, let’s first consider some technical aspects:

• Web3.js and Metamask Interaction: When using Metamask on an external server, such as AWS Lambda, you need to establish a secure connection between your application code running on the external server and an Ethereum node using Web3.js.

• Web3.js and AWS Lambda Security Limitations: Web3.js functions cannot be run directly on AWS Lambda due to the sandbox environment. However, several solutions have been proposed to address this issue.

Proposed Solutions

There are several ways to enable web3.py computations with AWS Lambda:

• Web3.js and Metamask Hybrid: One proposed solution is to use Web3.js on an external server (AWS Lambda) and then use a secure gateway or proxy to interact with Metamask running on Ethereum.

• Ethereum Node Proxy: Another method involves using an Ethereum node proxy that runs on the AWS Lambda server and allows you to access Ethereum nodes through a proxy.

Sample Code

Here is some sample code that shows how to use web3.py with Metamask’s AWS Lambda:

import web3





Set up a Web3.js instance on an external server (AWS Lambda)
w3 = web3.Web3(web3.HTTPProvider('

Set up a proxy for your Ethereum node
node_proxy = web3.eth nodetool.NodeProxy(
timeout = 30,
)

Connect to your Metamask instance on an external server (AWS Lambda)
metamask_connection = w3.eth.connect('

Use a Metamask instance as a proxy for your Ethereum nodes
eth_node_proxy = metamask_connection.get_proxy('/eth/2')

Perform calculations using Ethereum node proxy
result = eth_node_proxy.call('external-function', args)
print (result)

In this example, we use web3.js to connect to an external server (AWS Lambda) and then use this connection to interact with Ethereum Metamask.

Conclusion

While it is technically possible to use web3.py with AWS Lambda, the solution requires some creative solutions. The solutions suggested above can help you overcome security limitations and performance issues.

However, keep in mind that using Web3.js directly in AWS Lambda may not be the most efficient or scalable approach. If you are building a production-ready DApp, you may want to consider deploying your own infrastructure, such as an Ethereum node proxy or a decentralized application (dApp) developer like Remix.