{
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  "archive_root": "union-staging",
  "boundary_guard": "cache",
  "bytes": 1302046990,
  "file": "2026-08-28T17.parquet",
  "generated_by": "tools/orderbook_ab/merge_ab.py",
  "hour": "2026-08-28/17",
  "hour_utc": "2026-08-28T17:00:00+00:00",
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        "transaction_hash",
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      "columns": [
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        "sequence",
        "timestamp",
        "market",
        "id",
        "assets_ids",
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      "columns": [
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        "sequence",
        "timestamp",
        "market",
        "id",
        "assets_ids",
        "outcomes",
        "question",
        "slug",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 134545038867693595,
      "min_sequence": 281478290655897,
      "order_by": [
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        "id",
        "timestamp",
        "sequence"
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      "row_count": 2586,
      "row_groups": [
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      "sha256": "f6ce68023220364ff0ce2e0602a2ef74703f21557905b2f4cff56c3341db3bc4"
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      "columns": [
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        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "price",
        "size",
        "side",
        "best_bid",
        "best_ask",
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        "source_witness"
      ],
      "max_sequence": 134545038868404039,
      "min_sequence": 281478290254830,
      "order_by": [
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        "asset_id",
        "timestamp",
        "sequence"
      ],
      "row_count": 103081548,
      "row_groups": [
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      ],
      "sha256": "ff6134a56a19be7dc6d5975fc1a54d2052e1112df383563d7d4725608b4aa998"
    },
    "tick_size_change": {
      "byte_range": [
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      ],
      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "old_tick_size",
        "new_tick_size",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 281478400464592,
      "min_sequence": 281478290727773,
      "order_by": [
        "market",
        "asset_id",
        "timestamp",
        "sequence"
      ],
      "row_count": 4612,
      "row_groups": [
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      ],
      "sha256": "03767733783767979ddb196641b71fb800b6223619450d225c7f606ec0ff47d8"
    }
  },
  "row_count": 115502714,
  "sequence_note": "sequence and timestamp_received are collector-local provenance; where domains carry the same row, the merge keeps the LAST ACTIVE domain's values -- for this hour, domain e (active: a, b, c, h, e)",
  "sha256": "20bd2de4f0f731a3e2b40386eaa45ab1af6245bbc242e80dc7592df8bda20211",
  "verification": {
    "note": "A range digest certifies BYTES. That those bytes are that product comes from this manifest and is cross-checkable against the Parquet footer, which is inside the whole-file sha256.",
    "primary": "sha256sum <file> == .sha256",
    "secondary": "curl -r <start>-<end-1> <url> | sha256sum == .products.<name>.sha256"
  },
  "witnesses": "abche",
  "served_verbatim": true,
  "served_note": "This hour is the merger's union file, published byte for byte. Hours before the era cutover are rebuilt here from the seven product files and carry one column fewer."
}