LayerZero V2 Vyper Module

This module rewrites all the important LayerZero V2 endpoint interfaces in Vyper into a standalone package. It’s built for anyone looking to integrate cross-chain messaging into their projects with ease and security. Curve Blockahs Oracle is powered by this module (GitHub link coming soon).

Overview

The module simplifies:

• Message encoding and fee estimation.
• Secure transmission and receipt of cross-chain messages.
• Easy integration into your Vyper contracts.

Security

Always ensure proper peer setup and ownership management when deploying. Code has not been audited yet and probably contains bugs.

Development

Requirements:

• Python 3.9+
• Vyper ~=0.4
• LayerZero V2 endpoint deployment on your chain of choice

Testing:

# Setup virtual environment
uv venv
uv sync
source venv/bin/activate

# Run all tests
pytest tests/

Testnet Example

The lz_testnet.ipynb notebook included in the repository shows how to deploy this module on a testnet, quote fees, and enable cross-chain message passing. It’s a simple way to see everything in action before integrating into your main project.

Notably, handling incoming messages can follow a recursive pattern. For example, your lzReceive might decode a message and trigger another lzSend.

Happy coding!

Example Use

ExampleMessager.vy contract provides a simple example of how to use the module.