strawhatra / pychain-ledger

Python blockchain ledger with streamlit web interface.

PyChain-Ledger

Description

You’re a fintech engineer who’s working at one of the five largest banks in the world. You were recently promoted to act as the lead developer on their decentralized finance team. Your task is to build a blockchain-based ledger system, complete with a user-friendly web interface. This ledger should allow partner banks to conduct financial transactions (that is, to transfer money between senders and receivers) and to verify the integrity of the data in the ledger.

You’ll make the following updates to the provided Python file for this assignment, which already contains the basic PyChain ledger structure that you created throughout the module:

Libraries

This project requires streamlit, dataclasses, typing, datetime, pandas and hashlib

Running Streamlit Web Interface

1. In the terminal, navigate to the folder where pychain.py is stored.

2. In the terminal, run the Streamlit application by using streamlit run pychain.py.

3. Enter values for the sender, receiver, and amount, and then click the "Add Block" button. You can do this several times to store several blocks in the ledger. You can even toggle the block difficulty with the slider on the lefthand side of the web interface.

4. Verify the block contents and hashes in the Streamlit dropdown menu.

5. Test the blockchain validation process by clicking the 'Validate Chain' button.

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PyChain Streamlit Web Interface Validation