Response drift: kalshi — event.image_url absent from live /events response, no fallback

[realfishsam]

Exchange

kalshi

Severity

MEDIUM

What Our Normalizer Expects

normalizer.ts:115 accesses raw.image_url with no fallback:

image: raw.image_url,

What The Live API Returns

The GET https://api.elections.kalshi.com/trade-api/v2/events?limit=1 response does not include an image_url field.

Endpoint tested: GET https://api.elections.kalshi.com/trade-api/v2/events?limit=1

Fields present on event objects:

events[].available_on_brokers: bool
events[].category: str
events[].collateral_return_type: str
events[].event_ticker: str
events[].last_updated_ts: str
events[].mutually_exclusive: bool
events[].series_ticker: str
events[].strike_period: str
events[].sub_title: str
events[].title: str

image_url is not present.

Impact

MEDIUM: All kalshi events will have image: undefined. Downstream UI components that render event images receive undefined instead of a URL string, which may show broken image placeholders or throw if the field is expected to be a string.

Suggested Fix

Add a fallback: image: raw.image_url ?? undefined is already effectively what happens, but to make it explicit and intentional — or check if the Kalshi /markets endpoint (which may include image_url on individual markets) can supply this and thread it through event normalization.

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Found by automated response shape drift audit