// GLOSSARY -- PAYMENTS & FINTECH

What is State Channel?

1 min read Updated

A state channel is an off-chain protocol that enables multiple state transitions between parties with minimal on-chain interaction — generalizing payment channels to support arbitrary smart contract interactions.

WHY IT MATTERS

State channels extend payment channels beyond simple balance updates. Any state machine can be run in a state channel: games, trading, voting, or complex multi-party protocols. Participants sign state updates off-chain and only go on-chain for disputes.

The key property: state channels have instant finality for cooperative cases. As long as both parties agree, state updates happen at network speed (milliseconds) with zero gas cost.

State channels are ideal for applications with: known participants, many interactions between the same parties, and tolerance for going on-chain for disputes. Less suited for open, permissionless applications.

FREQUENTLY ASKED QUESTIONS

State channels vs rollups?
State channels: instant finality, zero gas for cooperative updates, but limited to known participants. Rollups: permissionless, handle any number of users, but with gas costs and latency.
Where are state channels used?
Gaming (turn-based games with known players), payment streaming, bilateral trading, and any scenario with frequent interactions between identified parties.
What happens in a dispute?
Either party can submit the latest signed state to the on-chain contract. The contract verifies signatures and enforces the state after a challenge period.

FURTHER READING

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