At some point we decide to open our jar (i.e. we close our Lightning channel). At that point we both take out whatever amount of money our final agreement was and deposit it back to our bank account. Only then do we need to make a transaction with a bank (a transaction on the bitcoin network), and only then does the bank/bitcoin network become aware of the final split of funds.
Excellent explanation of LN. I think there is no better way to understand LN then reading this short but informative explanation.
There is question I wanna ask. Since the opening and closing of channels are the only thing going over bitcoin blockchain. Who is responsible for the integrity of intermediate transactions that are going on once channel is open and before its closed? LN do it on its own or in consultation with bitcoin blockchain since the final transactions will be going to Bitcoin blockchain once channel is closed.