blockHeight property
The block a verified merkle proof puts this transaction in, and null when nothing proves it is in one (bead libspiffy-nys0). An unproven import used to journal height 0 — the genesis block — because this could not hold an absence. Set together with bumpProof: a height here means the BUMP in bumpProof checked out against a header on our active chain, which is what "confirmed" means anywhere in this library (bead libspiffy-jc3h).
Implementation
final int? blockHeight;