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  "generated_by": "tools/orderbook_ab/merge_ab.py",
  "hour": "2026-09-01/18",
  "hour_utc": "2026-09-01T18:00:00+00:00",
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    "book": {
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      "columns": [
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        "sequence",
        "timestamp",
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    "last_trade_price": {
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      "columns": [
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        "market",
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        "size",
        "side",
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      "columns": [
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        "timestamp",
        "market",
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        "assets_ids",
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        "winning_outcome",
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      "columns": [
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        "outcomes",
        "question",
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      "max_sequence": 53198777771957314,
      "min_sequence": 281486988879580,
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      "columns": [
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        "sequence",
        "timestamp",
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      "max_sequence": 53198777780442848,
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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": 281487095459771,
      "min_sequence": 281486990623491,
      "order_by": [
        "market",
        "asset_id",
        "timestamp",
        "sequence"
      ],
      "row_count": 4828,
      "row_groups": [
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      "sha256": "367093c0fded51ef37f79368eb0c1a525b97b6ab1f079bbe9223c4d051941379"
    }
  },
  "row_count": 109144949,
  "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: c, h, e)",
  "sha256": "e8caa2218c6267b69dcee2910e509b7b24b27035bf15bf067499a1673804f920",
  "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"
  },
  "witness_stats": "2026-09-01T18.witness_stats.json",
  "witnesses": "che",
  "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."
}
