{"mode":"epoch","epoch_interval_s":600,"epochs_confirmed":3,"documents_total":30,"documents_iota_anchored":30,"gas_spent_iota":0.0107292,"iota_eur_assumed":0.045,"gas_spent_eur":0.000483,"marginal_cost_per_document_eur":1.609e-05,"target_eur":0.001,"within_target":true,"note":"computed from confirmed IOTA epochs only; one transaction covers every document stamped in its interval, so the per-document cost falls as volume grows"}