feat: add Dockerfile

Dockerfile

@@ -0,0 +1,64 @@
+# This image uses cargo-chef to build the application in order to compile
+# the dependencies apart from the main application. This allows the compiled
+# dependencies to be cached in the Docker layer and greatly reduce the
+# build time when there isn't any dependency changes.
+#
+# https://github.com/LukeMathWalker/cargo-chef
+
+ARG SRC_DIR=/usr/local/src/bp-descriptor-wallet
+ARG BUILDER_DIR=/srv/bp-descriptor-wallet
+
+# Base image
+FROM rust:1.59.0-slim-bullseye as chef
+
+ARG SRC_DIR
+ARG BUILDER_DIR
+
+RUN rustup default stable
+RUN rustup update
+RUN cargo install cargo-chef --locked
+
+WORKDIR $SRC_DIR
+
+# Cargo chef step that analyzes the project to determine the minimum subset of
+# files (Cargo.lock and Cargo.toml manifests) required to build it and cache
+# dependencies
+FROM chef AS planner
+
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
+
+FROM chef AS builder
+
+ARG SRC_DIR
+ARG BUILDER_DIR
+
+COPY --from=planner "${SRC_DIR}/recipe.json" recipe.json
+
+# Build dependencies - this is the caching Docker layer
+RUN cargo chef cook --release --recipe-path recipe.json --target-dir "${BUILDER_DIR}"
+
+# Copy all files and build application
+COPY . .
+RUN cargo build --release --target-dir "${BUILDER_DIR}" --bins --all-features
+
+# Final image with binaries
+FROM debian:bullseye-slim as final
+
+ARG BUILDER_DIR
+ARG BIN_DIR=/usr/local/bin
+ARG DATA_DIR=/var/lib/bp-descriptor-wallet
+ARG USER=bp
+
+RUN adduser --home "${DATA_DIR}" --shell /bin/bash --disabled-login \
+        --gecos "${USER} user" ${USER}
+
+COPY --from=builder --chown=${USER}:${USER} \
+     "${BUILDER_DIR}/release" "${BIN_DIR}"
+
+WORKDIR "${BIN_DIR}"
+
+# Remove build artifacts in order to keep only the binaries
+RUN rm -rf */ *.d .[^.] .??*
+
+USER ${USER}

README.md

@@ -11,7 +11,7 @@
 [![Apache2 licensed](https://img.shields.io/badge/license-Apache%202-blue)](./LICENSE)
 
 Library for building descriptor-based bitcoin wallets. Everything a modern
-cold and hot bitcoin wallet needs, but which is not (yet) a part of 
+cold and hot bitcoin wallet needs, but which is not (yet) a part of
 [rust-bitcoin](https://crates.io/bitcoin) library.
 
 The library clearly separates parts requiring access to private keys from
@@ -23,15 +23,16 @@ command-line `btc-hot` and `btc-cold` wallets in [`bin`](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 
+- 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 
+- script templates allowing embedding extended pubkeys into bitcoin script
   assembly;
 - lexicographic ordering of transaction & PSBT inputs & oututs;
 - script type system;
@@ -47,6 +48,7 @@ Library provides
 
 One may install command-line wallets with the following command (requires
 rust compiler and `rustup` tools to be already installed on a system):
+
 ```console
 $ rustup default stable
 $ rustup update
@@ -58,3 +60,35 @@ $ cargo install --path . --locked --all-features
 This will add `btc-hot` and `btc-cold` commands to the system.
 
 [bin]: https://github.com/BP-WG/descriptor-wallet/tree/master/src/bin
+
+### Install with Docker
+
+#### Build
+
+Clone the repository and checkout to the desired version (here `v0.8.0`):
+
+```console
+$ git clone https://github.com/BP-WG/descriptor-wallet
+$ cd descriptor-wallet
+$ git checkout v0.8.0
+```
+
+Build and tag the Docker image:
+
+```console
+$ docker build -t descriptor-wallet:v0.8.0 .
+```
+
+#### Usage
+
+```console
+$ docker run descriptor-wallet:v0.8.0 btc-hot --help
+$ docker run descriptor-wallet:v0.8.0 btc-cold --help
+```
+
+#### Examples with files
+
+```console
+$ 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
+```