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python_blockchain_app's Introduction

Python Blockchain

Used as a backend in blockchat

See the original for the tutorial on this.

Changes made from original

  • Supports conversation between two people (instead of a common chat room)
  • Added coins
  • Encryption of messages using RSA Public-Private Key pairs
  • Transactions are stored to a file instead of using only memory
  • Transactions file is asynchronously uploaded to a Firebase Storage container
  • Tried to eliminate race condition when two users send a message simulatenously
  • Ready to be deployed to Heroku

python_blockchain_app's People

Contributors

samyak2 avatar satwikkansal avatar

Watchers

James Cloos avatar avatar

python_blockchain_app's Issues

Use Decimal instead of float to store coins

The issue

  • Using float to store very small values can lead to unexpected results.
  • Since very small amounts of coins need to added or subtracted, it is bad idea to use float

Solution

  • Use decimal.Decimal to store coins

Validate coins before making a transaction

The issue

  • Currently, there is no validation done when sending messages or transactions.
  • This can lead to negative values of coins.

Possible solutions

  • Check if the sender has enough coins to make the transaction.
  • It will be computationally expensive to iterate through the entire blockchain to get the number of coins for a user, though that is the only way to guarantee that the calculations will be correct.
  • You are free to use any approach for this.

Create a better README

  • The README file does not have much information about the project.

  • Add sections like:

  • Description

  • Instructions to use / Usage

  • Implementation details

  • Add your own...

  • PRs for any one of these will also be considered.

  • Also see #4

Clean and document the code

  • The code contains a lot of unnecessary code that is commented out. Those can be removed.
  • The code is mostly undocumented.
  • Also see #3

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