Historical retrospective · Layer 2

The Lightning paper framed payment channels as a Bitcoin scaling path

The Lightning Network’s foundational paper described routed payment channels that can settle balances on Bitcoin without recording every transfer on-chain.

Event / milestone year: 2017First published

Channel networks aim to reduce base-layer transaction demand while preserving the option to settle disputes using Bitcoin’s consensus rules.

The proposal helped establish a layered scaling narrative that continues to shape Bitcoin development.

Off-chain payments trade block-space use for channel liquidity, online availability and routing constraints.

Primary source

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Lightning BOLTs specifications ↗