# Function: deriveAuctionStatusFallback()

> **deriveAuctionStatusFallback**(`details`, `collection`): [`AuctionStatus`](https://docs.bitbadges.io/sdk/reference/type-aliases/auction-status)

Defined in: [packages/bitbadgesjs-sdk/src/core/auctions.ts:141](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/core/auctions.ts#L141)

Fallback status derivation for pre-indexed / mint-preview collections where
the indexer hasn't attached `standardsInfo.Auction.status` yet. The indexer
is the source of truth for live collections — prefer that when available.

## Parameters

### details

[`AuctionDetails`](https://docs.bitbadges.io/sdk/reference/interfaces/auction-details)

### collection

`Readonly`\<[`iCollectionDoc`](https://docs.bitbadges.io/sdk/reference/interfaces/i-collection-doc)\<`bigint`\>\>

## Returns

[`AuctionStatus`](https://docs.bitbadges.io/sdk/reference/type-aliases/auction-status)