Eclair is ACINQ’s Scala-based Lightning Network implementation, designed for scalability and ease of integration into existing applications. Known for its robust performance and enterprise-grade reliability, Eclair powers the popular Phoenix and Acinq mobile Lightning wallets. The implementation features a modular architecture, support for various node deployment configurations, and comprehensive implementation of Lightning protocol specifications including advanced features like trampoline payments and multi-part payments. Eclair emphasizes security and has been instrumental in developing Lightning Network standards, contributing significantly to protocol improvements and interoperability between different implementations.