init(hash:height:timestamp:)

Creates a BlockTip.

init(hash: Data, height: Int, timestamp: Date? = nil)

Parameters

hash: Exactly 32 bytes in internal (kernel) byte order. Passing display-order hex bytes here will make the tip compare unequal to every kernel-produced tip.
height: The block’s height above genesis (≥ 0).
timestamp: The block’s header timestamp, or nil when unknown.

Discussion

Precondition

hash.count == 32. Wrong-length hashes crash rather than silently truncate — this is a programmer error, not a runtime condition callers can recover from.

BlockTip(hash: Data(repeating: 0, count: 32), height: 0)   // genesis placeholder