Let's build a simple asynchronous Web3 client for Ethereum blockchain in python

1. aio-eth

   1 4 28 2.7 Python

   A simple python library that can be used to run large Web3 queries on Ethereum blockchain concurrently as per Ethereum JSON-RPC specification.

   

   The package is open source and can be found on Github.

2. JetBrains

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3. gRPC

   2 224 43,558 9.9 C++

   C++ based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)

   

   Ethereum has a very well defined set of methods that can be used to interact with the blockchain from external systems (probably from our current Web 2.0 systems). Ethereum exposes these functionalities over JSON-RPC 2.0 protocol. In brief, JSON-RPC is a light-weight data interchange protocol built on top of application layer protocols like HTTP and Web Sockets. Using JSON-RPC we specify the method we want to invoke and the list of parameters to be passed, the method is then executed by the Ethereum's JSON-RPC server to which we have connected and returns the output as JSON which can be consumed by the caller. When compared to gRPC and other known RPC protocols JSON-RPC is relatively simple and uses plain text JSON which is more readable and easily understandable. We can see the list of methods provided by Ethereum blockchain via JSON-RPC protocol here.

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