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  "bytes": 890924392,
  "file": "2026-09-01T20.parquet",
  "generated_by": "tools/orderbook_ab/merge_ab.py",
  "hour": "2026-09-01/20",
  "hour_utc": "2026-09-01T20:00:00+00:00",
  "layout": "union-event-sorted-v1",
  "max_sequence": 53198777958279658,
  "merger_git_sha": "4b62fc9b20e966fbf2a7877895dbf6e0f609dfb6",
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      ],
      "columns": [
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        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "best_bid",
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        "spread",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 53198777958279620,
      "min_sequence": 281487192174719,
      "order_by": [
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        "asset_id",
        "timestamp",
        "sequence"
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      "row_count": 5653129,
      "row_groups": [
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      ],
      "sha256": "db604a27ab1ea59e4c6af27c02272f7132eb6abcd57f7c92ba3bc39e97d976b4"
    },
    "book": {
      "byte_range": [
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      ],
      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "bids",
        "asks",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 53198777958279590,
      "min_sequence": 281487192175945,
      "order_by": [
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      "sha256": "7966f2a1387e55f2d9d0c2da01e70dfdf061d3ae798094b1ab58e627d9f6e633"
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    "last_trade_price": {
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      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "price",
        "size",
        "side",
        "fee_rate_bps",
        "transaction_hash",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 53198777957506615,
      "min_sequence": 281487192180020,
      "order_by": [
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      "sha256": "733e1cd0b90c1d813c5561942e2d60ccc0d5fefe36903729cd69308d3dd3fbe3"
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    "market_resolved": {
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      ],
      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "id",
        "assets_ids",
        "winning_asset_id",
        "winning_outcome",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 53198777949461674,
      "min_sequence": 281487193455001,
      "order_by": [
        "market",
        "id",
        "timestamp",
        "sequence"
      ],
      "row_count": 1314,
      "row_groups": [
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      ],
      "sha256": "b85c7b6e157a82d40b428a04b57fc205f58a91f79d7c26efe6f19823b4bf4c5d"
    },
    "new_market": {
      "byte_range": [
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      ],
      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "id",
        "assets_ids",
        "outcomes",
        "question",
        "slug",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 53198777957940463,
      "min_sequence": 281487192523278,
      "order_by": [
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        "timestamp",
        "sequence"
      ],
      "row_count": 9939,
      "row_groups": [
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        27
      ],
      "sha256": "619984956b0a7b6dac12d4476a5ddcaf48423abe3123e3b7bce6b4e0bbfc9a09"
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    "price_change": {
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      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "price",
        "size",
        "side",
        "best_bid",
        "best_ask",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 53198777958279658,
      "min_sequence": 281487192174721,
      "order_by": [
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        "asset_id",
        "timestamp",
        "sequence"
      ],
      "row_count": 74620128,
      "row_groups": [
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      ],
      "sha256": "570da692df63d238ba825f0de8dbd2237c8a43b796e73cf6c889ff015a4abf4c"
    },
    "tick_size_change": {
      "byte_range": [
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        889998667
      ],
      "columns": [
        "timestamp_received",
        "sequence",
        "timestamp",
        "market",
        "asset_id",
        "old_tick_size",
        "new_tick_size",
        "witness_set",
        "arrival_skew",
        "source_witness"
      ],
      "max_sequence": 53198777932899119,
      "min_sequence": 281487193962987,
      "order_by": [
        "market",
        "asset_id",
        "timestamp",
        "sequence"
      ],
      "row_count": 7804,
      "row_groups": [
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      ],
      "sha256": "e70ee253fd5bfdbb3ddab1e008bc41b559cf3a4405b5da6d5be009d7be8ce20f"
    }
  },
  "row_count": 81079941,
  "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": "cfbdd533cee16671797297eaf247e9225c6f06205f985bfdda630a24419eb919",
  "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": "2026-09-01T20.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."
}