Tx Parser

Implement Ethereum blockchain parser that will allow to query transactions for subscribed addresses.

Project Structure

The project is organized as follows:

• internal: This directory contains three packages.
  • state: This package is used to define the application state. It includes the data structures and methods necessary for maintaining and manipulating the application state during its lifecycle.
  • txparser: This package is responsible for implementing the core functionalities of the application. It interacts with blockchain for extracting and parsing on-chain data.
  • service: The file service.go defines the Parser interface, which can be used by API implementations and consumed by client applications. It also defines the Transaction domain type, which represents the transaction object in the application context.

In the root directory, you'll find a Makefile, which includes commands for building, running, and testing the application.

Testing

The project includes automated tests that can be run with the make test command. These tests ensure that all functionalities are working as expected.

Running the Application

To run the application, use the command: ./txparser -block=<block number>. The <block number> should be replaced with the actual number of the initial block to be scanned. After the initial block, the application will continue to scan subsequent blocks.

Future Improvements

While the current application serves its primary purpose, the following improvements could enrich the application:

• Error handling: By far the most important improvement is error handling. The current state of this app lacks proper error handling for targeting production environment.
• EIP-55 support: The current application is not compliant with EIP-55. Cloudflare API return addresses in lower case mode. Subscribed addresses will be persisted in lower case mode.
• Logging System: Implement a robust logging system to trace the application's operations and potential issues.
• Application Metrics: Incorporate a monitoring tool to gather important metrics like memory footprint, block scanning time, request count, error rates, etc., which could provide useful insights into the application's behavior.
• KeyValueStorer Database Engine: Currently, a mock key-value store is used. However, implementing a proper database engine will provide reliable, persistent data storage, improving data handling capabilities.

License

This project is licensed under the MIT License. Please refer to the LICENSE file for more details.