A simple Lightning Network transaction, how many transactions will be created on the main bitcoin chain? I guess is three transactions.


Alice create 2-to-2 multi-sig address AC

Alice put money in AC (first)

Bob put money in AC (second)

Alice create a refund transaction (third) both agree from AC send money to Alice and Bob, base on previous amount with lock-time.

case 1 before the lock-time:

Send a new transaction (fourth) to main chain, split the amount of two people. The thrid transaction with locktime will be ignored by miners.

case 2 debate, after lock-time

the third transaction will be put into the block by miners, refund all the money.


Yes, however, this created infrastructure you reference has the capacity to support many transactions on LND before the channel is closed, reducing the overall number of transactions on the blockchain probably significantly.

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  • i know they can make thousand of transactions during channel open. the third lock-time transaction in optional or have to? if I don't have lock-time transaction that is mean you could lost your money by unnormal situation – user71477 Mar 12 '18 at 7:37
  • The third and fourth transactions conflict with each other as they spend the same inputs so only one can become confirmed. – Andrew Chow May 17 '18 at 1:36

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