Instance Method

blockHash(atHeight:)

The hash of the block at the given height, in internal byte order.

func blockHash(atHeight height: Int) async throws -> Data

Parameters

height: Height above genesis (0 = genesis).

Return Value

32 bytes of hash data in internal (kernel) byte order.

Discussion

Throws

BlockSourceError.notFound if the source has no block at that height, or a transport-level BlockSourceError otherwise.

Warning

Returns whichever block the source currently thinks is at that height. During a reorg, the answer can change. The sync engine uses this method exactly once per run — at the fork-point check on resume — and walks by hash everywhere else. Don’t use it for chain identity in application code either.