state channel

The Lightning Network is a state channel system for fast, cheap Bitcoin micropayments.闪电网络（Lightning Network）是一个用于快速、低成本比特币小额支付的状态通道系统。

State channels allow two parties to transact off-chain at very high speed, settling only the final state on-chain.状态通道允许两方以极高的速度在链下进行交易，仅在链上结算最终状态。