Anoma

Namada

This repo contains an early prototype of Anoma. A lot of current development is happening on Namada. Please go there to check out the latest status.

Overview

Anoma is an intent-centric, privacy-preserving protocol for decentralized counterparty discovery, solving, and multi-chain atomic settlement. To learn more about Anoma's vision, take a look at the Anoma Vision Paper.

This is an implementation of the Anoma protocol in Rust.

Warning

Here lay dragons: this codebase is still experimental, try at your own risk!

💾 Installing

There is a single command to build and install Anoma executables from source (the node, the client and the wallet). This command will also verify that a compatible version of Tendermint is available and if not, attempt to install it. Note that currently at least 16GB RAM is needed to build from source.

make install

After installation, the main anoma executable will be available on path.

To find how to use it, check out the User Guide section of the docs.

If you have Nix, you may opt to build and install Anoma using Nix. The Nix integration also takes care of making a compatible version of Tendermint available.

# Nix 2.4 and later
nix profile install

# All versions of Nix
nix-env -f . -iA anoma

For more detailed instructions and more install options, see the Install section of the User Guide.

⚙️ Development

# Build the provided validity predicate, transaction and matchmaker wasm modules
make build-wasm-scripts-docker

# Development (debug) build Anoma, which includes a validator and some default 
# accounts, whose keys and addresses are available in the wallet
ANOMA_DEV=true make

Using Nix

You may opt to get all of the dependencies to develop Anoma by entering the development shell:

# Nix 2.4 and above
nix develop

# All versions of Nix
nix-shell

Inside the shell, all of the make targets work as usual:

# Build the WASM modules without docker
make build-wasm-scripts

# Development build (uses cargo)
ANOMA_DEV=true make

---

It is also possible to use the Nix Rust infrastructure instead of Cargo to build the project crates. This method uses crate2nix to derive Nix expressions from Cargo.toml and Cargo.lock files. The workspace members are exposed as packages in flake.nix with a rust_ prefix. Variants where the ABCI-plus-plus feature flag is enabled are exposed with a :ABCI-plus-plus suffix.

# List all packages
nix flake show

# Build the `anoma_apps` crate with `ABCI-plus-plus` feature
nix build .#rust_anoma_apps:ABCI-plus-plus

# Build the (default) anoma package. It consists of wrappers for the Anoma
# binaries (`rust_anoma_apps`) that ensure `tendermint` is in `PATH`.
nix build .#anoma

Advantages:

• Excellent build reproducibility (all dependencies pinned).
• Individual crates are stored as Nix derivations and therefore cached in the Nix store.
• Makes it possible to build Nix derivations of the binaries. Cargo build doesn't work in the Nix build environment because network access is not allowed, meaning that Cargo can't fetch dependencies; cargo vendor could be used to prefetch everything for Cargo, but cargo vendor does not work on our project at the moment.

Disadvantages:

• Only works for Linux and Darwin targets. WASM builds in particular are not possible with this method. Although, while crate2nix doesn't support targeting WASM, we should be able to build the WASM modules via Cargo - if only cargo vendor worked.

Note: If you have modified the Cargo dependencies (changed Cargo.lock), it is necessary to recreate the Cargo.nix expressions with crate2nix. Helpers are provided as flake apps (Nix 2.4 and later):

nix run .#generateCargoNix
nix run .#generateCargoNixABCI-plus-plus

Before submitting a PR, pls make sure to run the following

# Format the code
make fmt

# Lint the code
make clippy

🧾 Logging

To change the log level, set ANOMA_LOG environment variable to one of:

• error
• warn
• info
• debug
• trace

The default is set to info for all the modules, expect for Tendermint ABCI, which has a lot of debug logging.

For more fine-grained logging levels settings, please refer to the tracing subscriber docs for more information.

To switch on logging in tests that use #[test] macro from test_log::test, use RUST_LOG with e.g. RUST_LOG=info cargo test -- --nocapture.

How to contribute

Please see the contributing page.

Dependencies

The ledger currently requires that Tendermint version 0.34.x is installed and available on path. The pre-built binaries and the source for 0.34.8 are here, also directly available in some package managers.

This can be installed by make install command (which runs scripts/install/get_tendermint.sh script).