#bitcoin #wallet #cryptocurrency #descriptor #miniscript

bin+lib descriptor-wallet

Libraries and command line tool for building descriptor-based bitcoin wallets

36 releases

Uses new Rust 2021

0.8.3 Jul 30, 2022
0.8.0 Jun 30, 2022
0.7.0-alpha.1 Mar 29, 2022
0.5.1 Dec 18, 2021
0.4.0 Mar 8, 2021

#72 in Magic Beans

Download history 211/week @ 2022-04-21 546/week @ 2022-04-28 664/week @ 2022-05-05 931/week @ 2022-05-12 559/week @ 2022-05-19 742/week @ 2022-05-26 763/week @ 2022-06-02 1713/week @ 2022-06-09 3759/week @ 2022-06-16 979/week @ 2022-06-23 1353/week @ 2022-06-30 1563/week @ 2022-07-07 1017/week @ 2022-07-14 608/week @ 2022-07-21 381/week @ 2022-07-28 142/week @ 2022-08-04

2,458 downloads per month
Used in 26 crates (14 directly)

Apache-2.0

155KB
1.5K SLoC

Descriptor wallet library

Build Tests Lints codecov

crates.io Docs unsafe forbidden Apache2 licensed

Library for building descriptor-based bitcoin wallets. Everything a modern cold and hot bitcoin wallet needs, but which is not (yet) a part of rust-bitcoin library.

The library clearly separates parts requiring access to private keys from those which should operate never touching them. It is advised that wallets should be designed in a way assuming zero private key access for all of their operations aside from transaction signing; this part must be separated into other repository/library and be strictly controlled. One may look after command-line btc-hot and btc-cold wallets in bin directory for an example of how this can be done.

Library provides

  • efficient manipulations with BIP-32 derivation paths, separating derivations requiring private key access from those, which will always operate without;
  • miniscript & classical bitcoin descriptors;
  • PSBT constructor using input descriptors, which allow to specify custom information about RBFs, previous public key P2C tweaks and custom hash types on a per-input basis;
  • PSBT signer, supporting RBFs, relative and absolute timelocks, all sighash types, complex scripts, including witness- and taproot-based;
  • script templates allowing embedding extended pubkeys into bitcoin script assembly;
  • lexicographic ordering of transaction & PSBT inputs & oututs;
  • script type system;
  • helper types for working with hash-lock contracts;
  • PSBT utility functions (retrieving previous output, computing fee);
  • transaction resolver API on top of Electrum Server API for convenience computation of already-mined transaction fees etc;
  • support for SLIP-32/132 extended pubkey types (ypub, zprv etc).

Wallet comparison diagram

Command-line wallets

One may install command-line wallets with the following command (requires rust compiler and rustup tools to be already installed on a system):

$ rustup default stable
$ rustup update
$ git clone https://github.com/BP-WG/descriptor-wallet
$ cd descriptor-wallet
$ cargo install --path . --locked --all-features

This will add btc-hot and btc-cold commands to the system.

Install with Docker

Build

Clone the repository and checkout to the desired version (here v0.8.0):

$ git clone https://github.com/BP-WG/descriptor-wallet
$ cd descriptor-wallet
$ git checkout v0.8.0

Build and tag the Docker image:

$ docker build -t descriptor-wallet:v0.8.0 .

Usage

$ docker run descriptor-wallet:v0.8.0 btc-hot --help
$ docker run descriptor-wallet:v0.8.0 btc-cold --help

Examples with files

$ docker run -v $PWD/data:/data descriptor-wallet:v0.8.0 btc-hot seed /data/testnet.seed
$ docker run -v $PWD/data:/data descriptor-wallet:v0.8.0 btc-hot derive --testnet /data/testnet.seed /data/testnet

Dependencies

~9–12MB
~168K SLoC