BOLT2
Channel Close
MUST allow multiple HTLCs with the same payment_hash.
理由
If a node did not accept multiple HTLCs with the same payment hash, an attacker could probe to see if a node had an existing HTLC.
複数の HTLC を追加することができる?
Note that the non-funder is not paying the fee, so there is no reason for it to have a maximum feerate.
誰が fee を払うか
channel_reserve_satoshis
1% of the channel total is suggested
多分これは後からは変更できない
update_fee