State Channel

A state channel is a scaling technique where two or more participants lock some assets or agree to a shared state on a blockchain, then make many updates privately off-chain. Each update is signed by the participants, so it can be proven later if needed. When they are finished, the latest agreed state is submitted back to the blockchain for final settlement. The base chain acts as the referee and enforcement layer, while most activity happens away from it.

State channels matter because they can reduce fees and delays for interactions that involve repeated transactions between the same parties. They are commonly discussed for payments, games, exchanges, or apps where users update balances or moves many times before closing the session. A simple comparison is a bar tab: instead of paying on-chain for every drink, participants keep a running signed record and settle the final amount once. The trade-off is that channels usually require participants to be online or use monitoring services to respond if someone tries to settle an outdated state.