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Yup! You guessed it right. The Lightning Network. What do we know about this technology that it is so controversial getting into Bitcoins business?
Lightning Network is the 2nd layer payment protocol that of course operates on the top of a blockchain based cryptocurrency like of course, Bitcoin. Enabling fast transaction of which solving the problem that Bitcoin is having and that is "Scalability".
You may continue your reading here: https://blog.kucoin.com/lightning-network-off-chain-solution-to-bitcoin-scalability-sk-st