> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hypedexer.com/llms.txt
> Use this file to discover all available pages before exploring further.

# userFills

> Per-user fills: snapshot then live updates over the same WebSocket

Subscribe with `{"method":"subscribe","subscription":{"type":"userFills","user":"0x..."}}` (optional `aggregateByTime`). Initial payload matches **`UserFillsSnapshot`**; subsequent events use **`UserFillsUpdate`** in `components/schemas` of the same OpenAPI file.

## Snapshot for an idle account

When the live cache holds no recent fill for the account, the snapshot is served from storage: the account's most recent fills, up to 100, instead of an empty list. Fills from storage carry `twapId` (`null` outside a TWAP); their `crossed` flag is reliable from 24 September 2026 15:53 UTC.


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