What is the Bitcoin Lightning Network and how does it work?

Lightning moves many payments away from Bitcoin's base layer into channels that record only opening and closing states onchain.

This reduces the amount of block space required for frequent, smaller payments.

A channel is funded with an onchain transaction and participants exchange signed balance updates as payments occur. Only the latest valid state needs to be settled when the channel closes, which lets users make multiple payments without placing each one in a separate Bitcoin block.

Channels can connect through intermediary nodes using conditional payment mechanisms such as hashed timelock contracts.

Multisignature funding and revocation rules help prevent a participant from settling an outdated channel balance.

Payments can pass through a route of channels without each intermediary learning the full payment details. Conditional settlement lets funds move only when the required secret is revealed before a timeout, reducing the chance that a routing participant can keep a payment without forwarding it.

Lightning can improve speed, lower fees and support payments that would be impractical on the base layer.

It can also provide a different privacy profile because individual routed payments do not all appear directly on Bitcoin's public chain.

These properties can make small purchases and repeated transfers more practical, especially when users already have channel liquidity available. Actual costs depend on the route, channel policies and network conditions, so speed and low fees are benefits rather than guarantees.

Users still need liquidity, channel management and reliable node connectivity, while large routing nodes may create concentration concerns.

Opening and closing channels also require normal Bitcoin transactions and fees.

A receiver needs inbound liquidity and a sender needs outbound capacity along a usable route. Wallets can manage some complexity automatically, but users should understand backup and recovery options because losing channel state or access can complicate recovery of funds.