Hyperlane

Versioning

Note this is the branch for Hyperlane v2.

V1 has since been deprecated in favor of V2, but if you are looking for code relating to the existing V1 deployments of the testnet2 or mainnet environments, refer to the v1 branch.

Overview

Hyperlane is an interchain messaging protocol that allows applications to communicate between blockchains.

Developers can use Hyperlane to share state between blockchains, allowing them to build interchain applications that live natively across multiple chains.

To read more about interchain applications, how the protocol works, and how to integrate with Hyperlane, please see the documentation.

Working on Hyperlane

Workspaces

This monorepo uses Yarn Workspaces. Installing dependencies, building, testing, and running prettier for all packages can be done from the root directory of the repository.

• Installing dependencies

  yarn install
  

• Building

  yarn build
  

If you are using VSCode, you can launch the multi-root workspace with code mono.code-workspace, install the recommended workspace extensions, and use the editor settings.

Rust

• install rustup
• see rust/README.md

Running Agents Locally

See this guide for how to run the agents locally and perform a full end-to-end test.

Building Agent Images

There exists a docker build for the agent binaries. These docker images are used for deploying the agents in a production environment.

cd rust
./build.sh <image_tag>
./release.sh <image_tag>

Deploy Procedure

The contract addresses of each deploy can be found in rust/config. The latest deploy will be at rust/config/[latest timestamp] with bridge contracts within that same folder under /bridge/[latest timestamp].

The agents are set up to point at one environment at a time.

When agents are deployed to point at a new environment, they cease to point at the old ones. We do not continue to operate off-chain agents on old contract deploys. Contracts not supported by the agents will cease to function (i.e. messages will not be relayed between chains).

Off-chain agents are not automatically re-deployed when new contract deploys are merged. Auto-redeploys will be implemented at some future date.

Publishing JS/TS Packages

Packages can be versioned and published all at once with commands from the root.

First, increment the version to the desired value:

# An example of a prerelease version
yarn version:prepare 1.1.0-beta0
# Or a release version
yarn version:prepare 1.1.0

Commit this preparation so that it is clear which commit the release is from.

Next, ensure packages are cleaned and rebuilt:

yarn clean && yarn build

Finally, publish the packages to NPM

# Note: If you have not yet logged in, first run yarn npm login
yarn publish:all --otp YOUR_OTP_HERE
# Or for a pre-release, include the tag
yarn publish:all --otp YOUR_OTP_HERE --tag beta

For the git submodules, you will have to undo the removal of the yarn.lock files, yarn install and check in the yarn.lock changes on the submodule as well. Then checkin the updated commits on the monorepo itself.

Make PRs for the monorepo and the submodules.

Tag the commit with the appropriate version, and then create a github release with a changelog against the previous version https://github.com/hyperlane-xyz/hyperlane-monorepo/releases/new

Release Agents

• Tag the commit with the current date in the format agents-yyyy-mm-dd; e.g. agents-2023-03-28.
• Create a Github Release with a changelog against the previous version titled Agents MMMM DD, YYYY, e.g. Agents March 28, 2023.
• Include the agent docker image tag in the description of the release
• Create a summary of change highlights
• Create a "breaking changes" section with any changes required
• Deploy agents with the new image tag (if it makes sense to)