LittleBit

LittleBit is an educational library of Bitcoin primitives, with implementations in Python and Rust.

Objectives:

• Help the reader understand how Bitcoin really works at a fundamental level.
• Focus on readability in the Python implementation; on correctness, and performance in the Rust implementation.
• Zero (ish) dependency on third-party packages.

DISCLAIMER: This software comes sans warranty. Do NOT use this code for anything other than educational purposes. I beg you.

Progress report

Legend: 🍏 Done   🍋 In Progress   🍅 TODO   🐍 Python   🦀 Rust

Internal links to code inside the repository are indicated like this. External links look like this.

Component	Status
Elliptic Curve Cryptography (ECC)
Finite Field	🐍 ➞ 🍏 🦀 ➞ 🍏
Elliptic Curve	🐍 ➞ 🍏 🦀 ➞ 🍅
secp256k1	🐍 ➞ 🍏 🦀 ➞ 🍅
Signatures	🐍 ➞ 🍏 🦀 ➞ 🍅
Serialization
SEC Format	🐍 ➞ 🍏 🦀 ➞ 🍅
DER Format	🐍 ➞ 🍏 🦀 ➞ 🍅
Base58	🐍 ➞ 🍏 🦀 ➞ 🍅
Bitcoin Address Format	🐍 ➞ 🍏 🦀 ➞ 🍅
Wallet Import Format (WIF)	🐍 ➞ 🍏 🦀 ➞ 🍅
Transactions

_{Note: This table is not complete.}

Contributing

This is an educational project. You can help out by:

• 🔬 Auditing the codebase, asking questions, reporting bugs (please create issues).
• 💯 Improving coverage of unit tests.
• λ   Adding (clever) type annotations, especially with the Rust part.
• 💬 Adding code comments and explanations.