Constant MIN_CLTV_EXPIRY_DELTA

pub const MIN_CLTV_EXPIRY_DELTA: u16 = _; // 48u16

The minimum number of blocks between an inbound HTLC’s CLTV and the corresponding outbound HTLC’s CLTV. The current default represents roughly eight hours of blocks at six blocks/hour.

This can be increased (but not decreased) through ChannelConfig::cltv_expiry_delta