Spectre On Rust

Welcome to the Rust-based implementation of the Spectre full-node and its ancillary libraries. The contained node release serves as a drop-in replacement to the established Golang node and to date is the recommended node software for the Spectre network, introducing developers to the possibilities of Rust in the Spectre network's context.

We invite developers and blockchain enthusiasts to collaborate, test, and optimize our Rust implementation. Each line of code here is an opportunity to contribute to the open-source blockchain movement, shaping a platform designed for scalability and speed without compromising on decentralization.

Your feedback, contributions, and issue reports will be integral to evolving this codebase and continuing its maturity as a reliable node in the Spectre network.

Overview

Spectre on Rust is a fork of Kaspa on Rust introducing CPU-only mining algorithm SpectreX.

SpectreX is based on AstroBWTv3 and proof-of-work calculation is done in the following steps:

• Step 1: SHA-3
• Step 2: AstroBWTv3
• Step 3: HeavyHash

Spectre will add full non-disclosable privacy and anonymous transactions in future implemented with the GhostFACE protocol build by a team of anonymous crypto algorithm researchers and engineers. Simple and plain goal:

• PHANTOM Protocol + GhostDAG + GhostFACE = Spectre

Spectre will become a ghostchain; nothing more, nothing less. Design decisions have been made already and more details about the GhostFACE protocol will be released at a later stage. Sneak peak: It will use Pedersen Commitments as it allows perfect integration with the Spectre UTXO model and allows perfect hiding. ElGamal will be used for TX signature signing as it has a superior TPS (transactions per second) performance. Any PRs are welcome and can be made with anonymous accounts. No pre-mine, no shit, pure privacy is a hit!

Comparison

Why another fork? Kaspa is great but we love privacy, Monero and DERO are great but we love speed! So lets join the cool things from both. We decided to take Kaspa as codebase, quick comparison:

Feature	Spectre	Kaspa	Monero	DERO
PoW Algorithm	SpectreX	kHeavyHash	RandomX	AstroBWTv3
Balance Encryption	Future	No	Yes	Yes
Transaction Encryption	Future	No	Yes	Yes
Message Encyrption	Future	No	No	Yes
Untraceable Transactions	Future	No	Yes	Yes
Untraceable Mining	Yes	No	No	Yes
Built-in multicore CPU-miner	Yes	No	Yes	Yes
High BPS	Yes	Yes	No	No
High TPS	Yes	Yes	No	No

Untraceable Mining is already achieved with AstroBWTv3 and a multicore miner is already being shipped with Spectre, working on ARM/x86. We leave it up to the community to build an highly optimized CPU-miner.

Mathematics

We love numbers, you will find a lot of mathematical constants in the source code, in the genesis hash, genesis payload, genesis merkle hash and more. Mathematical constants like Pi, E and several prime numbers used as starting values for nonce or difficulty. The first released version is 0.3.14, the famous Pi divided by 10.

Installation

Building on Linux

1. Install general prerequisites

   sudo apt install curl git build-essential libssl-dev pkg-config

2. Install Protobuf (required for gRPC)

   sudo apt install protobuf-compiler libprotobuf-dev #Required for gRPC

3. Install the clang toolchain (required for RocksDB and WASM secp256k1 builds)

   sudo apt-get install clang-format clang-tidy \
   clang-tools clang clangd libc++-dev \
   libc++1 libc++abi-dev libc++abi1 \
   libclang-dev libclang1 liblldb-dev \
   libllvm-ocaml-dev libomp-dev libomp5 \
   lld lldb llvm-dev llvm-runtime \
   llvm python3-clang

4. Install the rust toolchain

   If you already have rust installed, update it by running: rustup update.

5. Install wasm-pack

   cargo install wasm-pack

6. Install wasm32 target

   rustup target add wasm32-unknown-unknown

7. Clone the repo

   git clone https://github.com/spectre-project/rusty-spectre
   cd rusty-spectre

Building on Windows

1. Install Git for Windows or an alternative Git distribution.

2. Install Protocol Buffers and add the bin directory to your Path

3. Install LLVM-15.0.6-win64.exe

   Add the bin directory of the LLVM installation (C:\Program Files\LLVM\bin) to PATH.

   Set LIBCLANG_PATH environment variable to point to the bin directory as well.

   IMPORTANT: Due to C++ dependency configuration issues, LLVM AR installation on Windows may not function correctly when switching between WASM and native C++ code compilation (native RocksDB+secp256k1 vs WASM32 builds of secp256k1). Unfortunately, manually setting AR environment variable also confuses C++ build toolchain (it should not be set for native but should be set for WASM32 targets). Currently, the best way to address this, is as follows: after installing LLVM on Windows, go to the target bin installation directory and copy or rename LLVM_AR.exe to AR.exe.

4. Install the rust toolchain

   If you already have rust installed, update it by running: rustup update.

5. Install wasm-pack

   cargo install wasm-pack

6. Install wasm32 target

   rustup target add wasm32-unknown-unknown

7. Clone the repo

   git clone https://github.com/spectre-project/rusty-spectre
   cd rusty-spectre

Building on Mac OS

1. Install Protobuf (required for gRPC)

   brew install protobuf

2. Install LLVM.

   The default XCode installation of llvm does not support WASM build targets. To build WASM on MacOS you need to install llvm from homebrew (at the time of writing, the llvm version for MacOS is 16.0.1).

   brew install llvm

   NOTE: Homebrew can use different keg installation locations depending on your configuration. For example:

   • /opt/homebrew/opt/llvm -> /opt/homebrew/Cellar/llvm/16.0.1
   • /usr/local/Cellar/llvm/16.0.1

   To determine the installation location you can use brew list llvm command and then modify the paths below accordingly:

   % brew list llvm
   /usr/local/Cellar/llvm/16.0.1/bin/FileCheck
   /usr/local/Cellar/llvm/16.0.1/bin/UnicodeNameMappingGenerator
   ...

   If you have /opt/homebrew/Cellar, then you should be able to use /opt/homebrew/opt/llvm.

   Add the following to your ~/.zshrc file:

   export PATH="/opt/homebrew/opt/llvm/bin:$PATH"
   export LDFLAGS="-L/opt/homebrew/opt/llvm/lib"
   export CPPFLAGS="-I/opt/homebrew/opt/llvm/include"
   export AR=/opt/homebrew/opt/llvm/bin/llvm-ar

   Reload the ~/.zshrc file:

   source ~/.zshrc

3. Install the rust toolchain

   If you already have rust installed, update it by running: rustup update.

4. Install wasm-pack

   cargo install wasm-pack

5. Install wasm32 target

   rustup target add wasm32-unknown-unknown

6. Clone the repo

   git clone https://github.com/spectre-project/rusty-spectre
   cd rusty-spectre

Building WASM32 SDK

Rust WebAssembly (WASM) refers to the use of the Rust programming language to write code that can be compiled into WebAssembly, a binary instruction format that runs in web browsers and NodeJs. This allows for easy development using JavaScript and TypeScript programming languages while retaining the benefits of Rust.

Spectre on Rust utilizes the SpectreX mining algorithm library for Rust and leverages cdivsufsort for enhanced performance. To compile the WASM32 SDK using clang, additional environment variables need to be configured:

export TARGET_CC=clang
export TARGET_CFLAGS=-I/usr/include

WASM SDK components can be built from sources by running:

• ./build-release - build a full release package (includes both release and debug builds for web and nodejs targets)
• ./build-docs - build TypeScript documentation
• ./build-web - release web build
• ./build-web-dev - development web build
• ./build-nodejs - release nodejs build
• ./build-nodejs-dev - development nodejs build

IMPORTANT: do not use dev builds in production. They are significantly larger, slower and include debug symbols.

Requirements

• NodeJs (v20+): https://nodejs.org/en
• TypeDoc: https://typedoc.org/

Builds & documentation

• Release builds: https://github.com/spectre-project/rusty-spectre/releases
• Developer TypeScript documentation is available from Kaspa

Running Spectre CLI + Wallet

spectre-cli crate provides cli-driven RPC interface to the node and a terminal interface to the Rusty Spectre Wallet runtime. These wallets are compatible with WASM SDK Wallet API and Spectre NG projects.

cd cli
cargo run --release

Running Local Web Wallet

Run an http server inside of wallet/wasm/web folder. If you don't have once, you can use the following:

cd wallet/wasm/web
cargo install basic-http-server
basic-http-server

The basic-http-server will serve on port 4000 by default, so open your web browser and load http://localhost:4000

The framework is compatible with all major desktop and mobile browsers.

Running the node

Start a mainnet node:

cargo run --release --bin spectred

Start a testnet node:

cargo run --release --bin spectred -- --testnet

Using a configuration file

cargo run --release --bin spectred -- --configfile /path/to/configfile.toml
# or
cargo run --release --bin spectred -- -C /path/to/configfile.toml

• The config file should be a list of <CLI argument> = <value> separated by newlines.
• Whitespace around the = is fine, arg=value and arg = value are both parsed correctly.
• Values with special characters like . or = will require quoting the value i.e <CLI argument> = "<value>".
• Arguments with multiple values should be surrounded with brackets like addpeer = ["10.0.0.1", "1.2.3.4"].

For example:

testnet = true
utxoindex = false
disable-upnp = true
perf-metrics = true
appdir = "some-dir"
netsuffix = 11
addpeer = ["10.0.0.1", "1.2.3.4"]

Pass the --help flag to view all possible arguments.

cargo run --release --bin spectred -- --help

wRPC

wRPC subsystem is disabled by default in spectred and can be enabled via:

JSON protocol:

--rpclisten-json = <interface:port>

Borsh protocol:

--rpclisten-borsh = <interface:port>

Sidenote

Rusty Spectre integrates an optional wRPC subsystem. wRPC is a high-performance, platform-neutral, Rust-centric, WebSocket-framed RPC implementation that can use Borsh and JSON protocol encoding.

JSON protocol messaging is similar to JSON-RPC 1.0, but differs from the specification due to server-side notifications.

Borsh encoding is meant for inter-process communication. When using Borsh both client and server should be built from the same codebase.

JSON protocol is based on Spectre data structures and is data-structure-version agnostic. You can connect to the JSON endpoint using any WebSocket library. Built-in RPC clients for JavaScript and TypeScript capable of running in web browsers and Node.js are available as a part of the Spectre WASM framework.

wRPC to gRPC Proxy is deprecated and no longer supported.

Mining

Mining is currently supported on all networks, so once you've setup a node, follow these instructions. Download and unzip the latest miner binaries from spectre-project/spectre-miner. In a separate terminal run the miner:

./spectre-miner --mining-address spectre:qrxf48dgrdkjxllxczek3uweuldtan9nanzjsavk0ak9ynwn0zsayjjh7upez

You can replace the above mining address with your own address by creating one.