https://github.com/sarahm44/pychain-ledger

A blockchain-based ledger system with Streamlit web interface that allows individuals to conduct financial transactions and verify the integrity of the data in the ledger.
https://github.com/sarahm44/pychain-ledger

blockchain cryptocurrency d-app dapp fintech ledger pychain streamlit streamlit-webapp

Last synced: 5 days ago
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A blockchain-based ledger system with Streamlit web interface that allows individuals to conduct financial transactions and verify the integrity of the data in the ledger.

• Host: GitHub
• URL: https://github.com/sarahm44/pychain-ledger
• Owner: sarahm44
• Created: 2022-06-21T04:08:15.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2022-08-10T05:04:10.000Z (over 2 years ago)
• Last Synced: 2025-01-26T05:18:42.671Z (20 days ago)
• Topics: blockchain, cryptocurrency, d-app, dapp, fintech, ledger, pychain, streamlit, streamlit-webapp
• Language: Python
• Homepage:
• Size: 1.61 MB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# PyChain Ledger

![](/Images/application-image.png)

## Overview

In this repository my task was to build a blockchain-based ledger system, complete with a user-friendly web interface (using [Streamlit](https://streamlit.io/)). 

This ledger should allow individuals to conduct financial transactions (that is, to transfer money between senders and receivers) and to verify the integrity of the data in the ledger.

## Required Tasks

I was required to make the following updates to the provided Python file:

1. Create a new data class named `Record`. 

2. Modify the existing `Block` data class to store `Record` data.

3. Add Relevant User Inputs to the Streamlit interface.

4. Test the PyChain Ledger by Storing Records.

### Step 1: Create a Record Data Class

I defined a new Python data class named Record. 

I gave this new class a formalized data structure that consists of the sender, receiver, and amount attributes. 

![Alt_text](/Images/screenshot_1.png)

### Step 2: Modify the Existing Block Data Class to Store Record Data

I renamed the data attribute in the Block class to record, and then set it to use an instance of the new Record class that I created in the previous section. 

![Alt_text](/Images/screenshot_2.png)

### Step 3: Add Relevant User Inputs to the Streamlit Interface

I coded additional input areas for the user interface of your Streamlit application. 

I created these input areas to capture the sender, receiver, and amount, for each transaction that will be stored in the Block record.

![Alt_text](/Images/screenshot_3.png)

### Step 4: Test the PyChain Ledger by Storing Records

I tested the complete PyChain ledger and user interface by running the Streamlit application and storing some mined blocks in the PyChain ledger. 

![Alt_text](/Images/screenshot_4.png)

I then tested the blockchain validation process by using the web interface. 

![Alt_text](/Images/screenshot_5.png)