# ACINQ/eclair

A scala implementation of the Lightning Network.

Repository: https://github.com/ACINQ/eclair
Canonical: https://ross.abutalabs.com/products/eclair
Language: Scala
License: Apache-2.0
License Family: permissive
Topics: eclair, lightning-network, bitcoin, payments, blockchain, cryptocurrency, lightning
Last push: 2026-08-26T15:39:38+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 4032, "days_push": 7, "days_rel": 7, "gap_med": 82.5, "n_releases_24m": 7}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1343, forks 284 (observed 2026-08-28T04:04:26.373784+00:00)

## What it is
Eclair is a Scala implementation of a Lightning Network node for Bitcoin, following the BOLT specifications. It provides a JSON HTTP API for managing channels and payments, and relies on Bitcoin Core for on-chain wallet functionality.

## Use cases
- run a lightning network node
- send and receive bitcoin lightning payments
- open and manage payment channels
- integrate lightning payments into an application via API
- route payments as a lightning node operator
- test lightning network applications on testnet

## When to choose
- you want a JVM/Scala-based Lightning node with a rich HTTP API
- you already run Bitcoin Core and want to add Lightning capability
- you need BOLT-spec-compliant routing and channel management
- you want to build applications on top of a programmable Lightning node

## When to avoid
- you need an all-in-one node with a built-in on-chain wallet
- you want a lightweight mobile or desktop wallet rather than a server node
- you prefer a non-JVM runtime or minimal resource footprint

## Facets
- artifact type: application
- maturity: active
- function: api-framework, http-server, cryptography, networking, cli
- domain: blockchain, fintech, developer-tools, self-hosted
- platform: jvm, windows, self-hosted, cli
- tags: lightning-network, bitcoin, payments, scala, payment-channels, bolt-compliance, cryptocurrency, linux, macos, docker

## Member repositories
- ACINQ/eclair (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:26.373784+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 2026-08-30T04:42:51.583256+00:00, confidence not recorded.
  - readme: https://github.com/ACINQ/eclair (fetched 2026-08-28T04:04:26.373784+00:00, sha cb0f8a3ed47f)
- Data as of 2026-08-30T08:39:29.467469+00:00.