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 calculations on the blockchain or communicate with external services. However, deploying these calculations to a production environment can be challenging due to security restrictions and performance issues.

One solution that has become popular 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 from AWS Lambda?

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

Background

Before we get 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, which allows us to interact with the Ethereum blockchain.

Can we use Metamask with AWS Lambda?

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

• Web3.js and Metamask Interaction: When using Metamask on an external server like AWS Lambda, you should 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 Limitations: You cannot directly run Web3.js functions on AWS Lambda due to its sandboxed environment. However, some solutions have been proposed to address this issue.

Proposed Solutions

There are several 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 an 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 running on your AWS Lambda server, allowing you to access Ethereum nodes through a proxy.

Code example

Here are some code examples that show how web3.py can be used with Metamask on AWS Lambda:

import web3

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

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

Establish a connection to the Metamask instance on an external server (AWS Lambda)
metamask_connection = w3.eth.connect('

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



Perform calculations using a proxy Ethereum node

result = eth_node_proxy.call('your-external-function', arguments)


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

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

However, note 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 a proxy Ethereum node or a decentralized application (dApp) builder such as Remix.