# LayerZero-Labs/LayerZero-v1

An Omnichain Interoperability Protocol

Repository: https://github.com/LayerZero-Labs/LayerZero-v1
Canonical: https://ross.abutalabs.com/products/layerzero-v1
Language: Solidity
License: NOASSERTION
License Family: other
Archived: true
Last push: 2024-06-18T09:00:42+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 1632, "days_push": 806, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1954, forks 1248 (observed 2026-08-28T04:05:58.906082+00:00)

## What it is
LayerZero is an omnichain interoperability protocol implemented as a set of gas-efficient, non-upgradable Solidity smart contracts for lightweight cross-chain message passing. This repository contains the LayerZero Endpoint contracts that developers can build on to send authentic, guaranteed messages across blockchains.

## Use cases
- send messages between blockchains from smart contracts
- build cross-chain dapps with omnichain interoperability
- deploy LayerZero endpoints to EVM networks with hardhat
- implement configurable trustless cross-chain communication
- bridge arbitrary data across chains without a trusted intermediary
- integrate cross-chain messaging into solidity contracts via npm package

## When to avoid
- you need a fully open-source license - the code is under Business Source License 1.1
- you need general-purpose bridging of tokens rather than message passing
- you work outside EVM-compatible chains

## Facets
- artifact type: library
- maturity: stable
- function: sdk, middleware, developer-tools
- domain: blockchain, apis, developer-tools
- platform: cross-platform, cli
- tags: solidity, smart-contracts, cross-chain, omnichain, interoperability, message-passing, hardhat, web3, evm, cryptocurrency

## Member repositories
- LayerZero-Labs/LayerZero-v1 (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:58.906082+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:06:31.802744+00:00, confidence not recorded.
  - readme: https://github.com/LayerZero-Labs/LayerZero-v1 (fetched 2026-08-28T04:05:58.906082+00:00, sha b08ddab8b964)
- Data as of 2026-08-30T08:39:29.467469+00:00.