Instance Method

readBlockSpentOutputs(at:)

Reads the spent outputs (undo data) for a block from disk — the collection of UTXOs that this block consumed.

func readBlockSpentOutputs(at entry: BlockTreeEntry) -> BlockSpentOutputs?

Parameters

entry: The block tree entry pointing to the block.

Return Value

The block’s spent outputs, or nil on read failure.

Discussion

Spent-output data is what lets the kernel undo a block during a reorg. Returns nil for the genesis block (no inputs spent, no undo data written) and when the undo file is not present on disk.