Bitcoin Cryptography Implementation

Simple Bitcoin cryptography implementation that generates BTC addresses from scratch and sends custom transactions with Bitcoin Core RPC.

🎥 Featured in my YouTube video: https://youtu.be/z2Ju7pcE6wo

Features

• Address Generation (main.ipynb): Generate Bitcoin addresses from private keys using secp256k1

  • Legacy addresses (P2PKH)
  • SegWit addresses (Bech32)
  • Private key formats: decimal, hex, WIF

• Transaction Sending (send.ipynb): Send Bitcoin with custom messages via Bitcoin Core RPC

  • OP_RETURN data embedding
  • PSBT workflow

Quick Start

1. Install dependencies:

   pip install -r requirements.txt

2. For transaction sending, create .env file:

   RPC_USER=your_username
   RPC_PASSWORD=your_password
   RPC_HOST=127.0.0.1
   RPC_PORT=8332

3. Run the notebooks:

   • main.ipynb - Generate Bitcoin addresses
   • send.ipynb - Send transactions (requires Bitcoin Core)

Dependencies

• ecdsa - Elliptic curve cryptography
• base58 - Address encoding
• bech32 - SegWit address encoding
• bitcoinrpc - Bitcoin Core RPC client

Warning

⚠️ Educational purposes only. Do not use for real funds.