{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"title": "Hip4OutcomeAggregate",
"description": "Per-outcome aggregate (both sides combined). Returned by `/outcomes` (list, without `aggregated_oi`) and `/outcomes/{outcome_id}` (detail, with `aggregated_oi` populated).",
"type": "object",
"required": [
"is_settled",
"outcome_id",
"side_specs"
],
"properties": {
"aggregated_oi": {
"description": "Display/paired/parity OI aggregates. Populated ONLY on the `/outcomes/{outcome_id}` detail response. Omitted (or null) on the `/outcomes` list response.",
"nullable": true,
"allOf": [
{
"description": "Derived OI display fields combining both sides of a HIP-4 outcome. Currency is always `USDH` (Hyperliquid's stablecoin). Only populated on `/outcomes/{outcome_id}` (detail), NOT on `/outcomes` (list).",
"type": "object",
"required": [
"currency"
],
"properties": {
"as_of": {
"description": "Latest timestamp across both sides",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-02T20:27:21Z"
},
"currency": {
"description": "Notional currency. Always `USDH` for HIP-4.",
"type": "string",
"enum": [
"USDH"
],
"example": "USDH"
},
"outcome_display_open_interest_contracts": {
"description": "Display total: sum of side0 + side1 OI contracts. Use this for outcome-level OI dashboards.",
"type": "number",
"nullable": true,
"example": 1136096
},
"paired_set_supply_contracts": {
"description": "Paired-set supply: minimum of side0 and side1 OI contracts. Represents the count of fully collateralized Yes+No pairs in circulation.",
"type": "number",
"nullable": true,
"example": 568048
},
"side0_as_of": {
"description": "Timestamp of the side 0 OI sample",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-02T20:27:21Z"
},
"side0_open_interest_contracts": {
"description": "Latest open-interest contracts for side 0 (Yes)",
"type": "number",
"nullable": true,
"example": 568048
},
"side1_as_of": {
"description": "Timestamp of the side 1 OI sample",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-02T20:27:21Z"
},
"side1_open_interest_contracts": {
"description": "Latest open-interest contracts for side 1 (No)",
"type": "number",
"nullable": true,
"example": 568048
},
"side_supply_parity": {
"description": "True when side0 OI equals side1 OI within tolerance. Parity should hold for binary outcomes; a sustained false value indicates ingestion drift.",
"type": "boolean",
"nullable": true,
"example": true
}
}
}
]
},
"class": {
"description": "Outcome class (e.g., `priceBinary`)",
"type": "string",
"nullable": true,
"example": "priceBinary"
},
"description_raw": {
"description": "Pipe-delimited recurring-market metadata as emitted upstream",
"type": "string",
"nullable": true,
"example": "class:priceBinary|underlying:BTC|expiry:20260503-0600|targetPrice:78213|period:1d"
},
"expiry": {
"description": "Settlement timestamp (UTC)",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-03T06:00:00Z"
},
"is_settled": {
"description": "Whether the outcome has settled",
"type": "boolean",
"example": false
},
"name": {
"description": "Human-readable outcome name (without per-side suffix)",
"type": "string",
"nullable": true,
"example": "BTC ā„ 78213 by 2026-05-03 06:00 UTC"
},
"outcome_id": {
"description": "Numeric outcome identifier",
"type": "integer",
"format": "int64",
"example": 0
},
"period": {
"description": "Cadence of the recurring market (e.g., `1d`, `1h`)",
"type": "string",
"nullable": true,
"example": "1d"
},
"side_specs": {
"description": "Per-side specs. Typically two elements: side 0 (Yes) and side 1 (No).",
"type": "array",
"items": {
"description": "Per-side spec nested in `Hip4OutcomeAggregate.side_specs`. One element per side (typically two: side 0 = Yes, side 1 = No).",
"type": "object",
"required": [
"asset_id",
"coin",
"name",
"side"
],
"properties": {
"asset_id": {
"description": "Public asset ID for this side",
"type": "integer",
"format": "int64",
"example": 100000000
},
"coin": {
"description": "Coin identifier for this side. Returned in `#`-prefixed form. REST paths accept either the bare numeric id (e.g. `0`) or the `#`-prefixed form (e.g. `#0`).",
"type": "string",
"example": "#0"
},
"name": {
"description": "Human label for this side",
"type": "string",
"example": "Yes"
},
"side": {
"description": "Side index: 0 = Yes, 1 = No",
"type": "integer",
"enum": [
0,
1
],
"example": 0
}
}
}
},
"source_seen_at": {
"description": "Last time the outcome was seen upstream",
"type": "string",
"format": "date-time",
"nullable": true,
"example": "2026-05-02T20:25:00Z"
},
"status": {
"description": "Lifecycle status (`live`, `settled`, ...)",
"type": "string",
"nullable": true,
"example": "live"
},
"target_price": {
"description": "Target price for the binary outcome",
"type": "number",
"nullable": true,
"example": 78213
},
"underlying": {
"description": "Underlying asset for recurring price-binary outcomes",
"type": "string",
"nullable": true,
"example": "BTC"
}
}
}
