Here’s 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 computations on the blockchain or interact with external services. However, deploying these computations to a production environment can be challenging due to security constraints and performance concerns.

One solution that has gained popularity recently 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, a popular Python library for Web3.js, be used on AWS Lambda?

In this article, we’ll dive into the details of how Metamask and web3.py can coexist on an AWS Lambda server.

Background

Before we dive into the question, let’s quickly recap what we need to know about:

• AWS Lambda: A serverless computing platform that allows you to run code without provisioning 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:

• Interaction between Web3.js and Metamask

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

• Web3.js and AWS Lambda Security Restrictions: You cannot run Web3.js functions directly on AWS Lambda due to its sandboxed environment. However, a few solutions have been proposed to address this issue.

Proposed Solutions

There are a few approaches being explored to enable web3.py computations on AWS Lambda:

• Hybrid Web3.js and Metamask

  

  : One proposed solution is to use Web3.js on the external server (AWS Lambda) and then use a secure gateway or proxy to interact with Metamask, which runs on Ethereum.

• Ethereum Node Proxy: Another approach involves using an Ethereum node proxy that runs on your AWS Lambda server, allowing you to access Ethereum nodes through the proxy.

Sample Code

Here is some sample code to demonstrate how web3.py can be used with Metamask on AWS Lambda:

import web3

Configure Web3.js instance on external server (AWS Lambda)
w3 = web3.Web3(web3.HTTPProvider('

Configure Ethereum node proxy
node_proxy = web3.eth nodetool.NodeProxy(
'
timeout=30,
)

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

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

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

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

Conclusion

While it is technically possible to use web3.py with AWS Lambda, the solution requires some creative workarounds. The solutions proposed above can help address security constraints and performance concerns.

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