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CircleCI Safety Dance

COMIT is an open protocol facilitating trustless cross-blockchain applications. This is a reference implementation for the COMIT protocol.

WARNING - We do not recommend running COMIT on mainnet for now!!!


The repository contains three main folders: cnd, btsieve, andvendor.

cnd (the COMIT Node Daemon) and btsieve hold code for the primary binaries that make up the reference implementation. Code in these can depend on libraries located in vendor.


Contains crates that provide general functionality that is not specific to the domain of atomic swaps. Crates defined in here MUST NOT depend on cnd or btsieve. They may be separated from the repository at some point (and possibly released on

Setup build environment

  1. Install rustup: curl -sSf | sh
  2. Install libzmq:
    • Ubuntu/Debian: apt install libzmq3-dev
    • Mac (Homebrew) brew install zeromq
  3. Install OpenSSL:
    • Ubuntu/Debian: apt install libssl-dev pkg-config

Build & Run

  1. cargo build
  2. Put a (default) config file into ~/.config/comit/btsieve.toml or pass --config <config_file>.
  3. startup bitcoin node (port to be set according to btsieve configuration)
  4. startup ethereum node (port to be set according to btsieve configuration)
  5. startup btsieve: target/debug/btsieve
  6. startup cnd: target/debug/cnd

If the [web_gui] section is specified in the configuration the current release of the user interface comit-i will be served once cnd started up (served at localhost:8080 as default).

In order to do a swap you will have to start two comit nodes (cnd & btsieve).

Setup testing/dev environment

  1. Install docker & docker-compose
  2. Install node (check the version required in api_tests/package.json) & yarn
  3. Install Rust nightly-2019-07-31: rustup install nightly-2019-07-31 (this one is only used for rustfmt)
  4. Install rustfmt for nightly-2019-07-31: rustup component add rustfmt --toolchain nightly-2019-07-31
  5. Install cargo-make: cargo install cargo-make
  6. Run cargo make in the root folder of the repository, this will install various crates & tools such as clippy


  • cargo make runs the whole test suite including integration tests but not end-to-end.
  • cargo make all also runs the whole test suite, including end-to-end tests.
  • cargo make format to format Rust code
  • cargo make ts-fix to format Typescript code
  • cargo make btsieve to run btsieve tests
  • cargo make dry to run cnd dry tests
  • cargo make api to run all API tests
  • cargo make e2e to run cnd end-to-end tests
  • cargo make e2e *btc* to run cnd end-to-end tests with btc in the folder name (supports shell glob on the name)

Alternatively, you can run the end-to-end tests and TypeScript related actions using yarn (careful! It does not recompile Rust for you):

  • yarn run test: run all tests
  • yarn run test <directory>: run all tests in the directory
  • yarn run test <path to test file>: run all tests in this test file, supports shell glob on the path
  • yarn run fix: run prettier and linter to fix format
  • yarn run check: run tsc (to check validity of TypeScript code) and verify format


Contributions are welcome, please visit CONTRIBUTING for more details.


This project is licensed under the terms of the GNU GENERAL PUBLIC LICENSE v3.

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