[Lightning-dev] Few questions

[Cezary Dziemian]

Good morning, there are few things I'm not completely sure about, so would
like to ask in order to prevent misunderstanding in Polish LN community.

1. Is this possible that by sending funds without invoice, the last hub
prepares the last HTLC with small amount to the payee? In other words - Can
payee detect, that the last HTLC amount is smaller that it should be?

2. Are there additional data added to the end of onion encrypted list of
HTLCs in order to prevent last hub to guess, that it is the last hub in the
route?

3. When payment is during confirmation, are channels locked entirely, or
only for the in flight payment amount? In other words - can single channel
process more that single transaction at once?

I would like to kindly pleas to reply in simple words, as my English is
still far from being perfect.

Best Regards,
Cezary Dziemian
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