TIP_BACKOFF_MS

const val TIP_BACKOFF_MS: Long

Headroom (ms) below the tip when clamping an idle sync-time. The chosen ctime must be ≤ tblock of the block that actually includes the tx, which is a few blocks past the tip we read. Backing off a small margin keeps ctime ≤ tblock even as the chain advances during proving + submission, staying inside the window's upper edge.