Cashu wallet and mint in Zig

About

Coconut 🥥 is a Cashu Wallet and Mint implementation in Zig.

Test

zig build test --summary all

Build

zig build -Doptimize=ReleaseFast

CLI Usage

The Coconut wallet provides a command-line interface for various operations. Here's how to use it:

General Help

To see the general help and available commands, run:

$ coconut --help
Version: 0.1.0
Author: Coconut Contributors
USAGE:
  coconut [OPTIONS]
COMMANDS:
  info   Display information about the Coconut wallet
OPTIONS:
  -h, --help            Show this help output.
      --color <VALUE>   When to use colors (*auto*, never, always).

Info Command

The info command displays information about the Coconut wallet. Here's its specific help:

$ coconut info --help
USAGE:
  coconut info [OPTIONS]
OPTIONS:
  -m, --mint       Fetch mint information
  -n, --mnemonic   Show your mnemonic
  -h, --help       Show this help output.

Example Usage

Here's an example of using the info command with the --mnemonic option:

$ coconut info --mnemonic

Version: 0.1.0
Wallet: coconut
Cashu dir: /Users/abdel/Library/Application Support/coconut
Mints:
    - URL: https://example.com:3338
        - Keysets:
            - ID: example_id  unit: sat  active: True   fee (ppk): 0
Mnemonic:
 - example word1 word2 word3 ...
Nostr:
    - Public key: npub1example...
    - Relays: wss://example1.com, wss://example2.com

This command displays general information about the wallet, including the version, wallet name, Cashu directory, mint information, and Nostr details. The --mnemonic option additionally displays the wallet's mnemonic phrase.

Note: Be cautious when using the --mnemonic option, as it displays sensitive information. Make sure you're in a secure environment when viewing your mnemonic.

Benchmarks

This project includes performance benchmarks for each step of the BDHKE process, as well as the end-to-end flow.

Running Benchmarks Locally

To run the benchmarks on your local machine:

zig build bench -Doptimize=ReleaseFast

The benchmarks will be compiled with the ReleaseFast optimization level.

Benchmark Results

Current results:

Operation	Time us	Time ns
hashToCurve	7.182 us	7181.94 ns
step1Alice	23.608 us	23608.43 ns
step2Bob	28.003 us	28002.82 ns
step3Alice	25.102 us	25101.80 ns
verify	29.020 us	29020.39 ns
e2e	112.626 us	112626.12 ns

This run was performed on a MacBook Pro with an M1 chip.

Machine Info:
  Model: MacBook Pro
  CPU: Apple M1 Max
  Cores: 10 (Physical), 10 (Logical)
  Memory: 64 GB
  macOS Version: 14.5
  Zig Version: 0.14.0-dev.850+ddcb7b1c1

Resources

• Cashu documentation
• Cashu slides by Gandalf
• Nutshell reference implementation

Contributors ✨

Thanks goes to these wonderful people (emoji key):

A₿del ∞/21M 🐺 - 🐱 💻 🤔 🧑‍🏫 📆 🔬 👀	Nikita Orlov 💻
Add your contributions

This project follows the all-contributors specification. Contributions of any kind welcome!