> ## Documentation Index
> Fetch the complete documentation index at: https://docs.theblockchainlibrary.com/llms.txt
> Use this file to discover all available pages before exploring further.

# State Channel

> A mechanism allowing participants to conduct repeated off-chain state updates and submit only opening, closing, or disputed states on-chain.

# State Channel

A mechanism allowing participants to conduct repeated off-chain state updates and submit only opening, closing, or disputed states on-chain.

## Definition

A mechanism allowing participants to conduct repeated off-chain state updates and submit only opening, closing, or disputed states on-chain.

## Why it matters

Scaling concepts explain how blockchain systems increase capacity while balancing security and decentralization.

## How it works

Participants deposit funds into a multi-sig smart contract on the blockchain. Once open, they transact directly off-chain by exchanging digitally signed messages representing current balances. When finished, they submit the final balance to the smart contract, which releases the corresponding funds, ensuring the outcome is final.

## Real-world example

The Lightning Network is the most famous example of a state channel implementation used for Bitcoin payments.

## Advantages

* Instant transaction finality
* Minimal on-chain footprint
* High privacy for participants

## Limitations

* Funds must be locked in advance
* Requires participants to be online
* Limited to two-party or fixed sets

## Common misconceptions

* People think state channels support all smart contracts, but they are limited to specific state updates.
* Some believe channels never hit the blockchain, but they require on-chain setup and settlement.

## Related knowledge

* [Data Availability](/generated/v2/glossary/data-availability) — term
* [Layer 2](/categories/layer-2) — term
* [Rollup](/generated/v2/glossary/rollup) — term
* [Throughput](/generated/v2/glossary/throughput) — term

***

**Canonical knowledge ID:** `glossary:state-channel`