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 interact with external services. However, implementing these calculations in a production environment can be challenging due to security constraints and performance issues.

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 from AWS Lambda?

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

Background

Before we tackle 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 consider a few technical aspects:

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

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

Proposed Workarounds

A few approaches are being explored to enable “web3.py” computations on AWS Lambda:

• Web3.js and Metamask hybrid: One proposed workaround 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 running on your AWS Lambda server, allowing you to access Ethereum nodes through the proxy.

Code Example

Here is a code example to demonstrate how “web3.py” could be used with Metamask on AWS Lambda:

import web3





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

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

Establish the 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 the 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, 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 solutions. The solutions proposed above can help address security constraints and performance issues.

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) generator like Remix.