Flash is a bi-directional off-Tangle payment channel to enable instantaneous, high-throughput transactions.

Flash is a bi-directional off-Tangle payment channel to enable instantaneous, high-throughput transactions. In essence, they provide a way for parties to transact at high frequency without waiting for each transaction to confirm on the public IOTA network. Instead, only two transactions will ever occur on the main IOTA network: opening and closing transactions of the Flash channel. An off-Tangle approach reduces the per-transaction overhead to a negligible level by creating signed transactions off the tangle and opens up a feeless transaction model for instant, token streaming.

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