Constant breez_sdk_liquid::lightning::chain::channelmonitor::CLOSED_CHANNEL_UPDATE_ID

pub const CLOSED_CHANNEL_UPDATE_ID: u64 = core::u64::MAX; // 18_446_744_073_709_551_615u64

The update ID used for a ChannelMonitorUpdate that is either:

(1) attempting to force close the channel by broadcasting our latest commitment transaction or (2) providing a preimage (after the channel has been force closed) from a forward link that allows us to spend an HTLC output on this channel’s (the backward link’s) broadcasted commitment transaction.

No other ChannelMonitorUpdates are allowed after force-close.