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

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

When you build 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 in a production environment can be challenging due to security limitations 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 by AWS Lambda?

In this article, we will take a deep dive into 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 having to deploy or manage 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 look at some technical aspects:

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

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

Suggested solutions

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

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

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

Sample Code

Here is a sample code showing how to use web3.py with Metamask on AWS Lambda:

import web3





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

Set up 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('

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

Perform computations using Ethereum node proxy
Result = eth_node_proxy.call('your-external-function', arguments)
Print(Result)

In this example, we connect 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 solutions suggested above can help address security limitations and performance issues.

However, keep in mind that using Web3.js directly on AWS Lambda may not be the most efficient or scalable approach. If you are 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.