# Interface: iMerkleChallengeTrackerDoc\<T\>

Defined in: [packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts:1547](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts#L1547)

## Extends

- [`Doc`](https://docs.bitbadges.io/sdk/reference/interfaces/doc)

## Type Parameters

### T

`T` *extends* [`NumberType`](https://docs.bitbadges.io/sdk/reference/type-aliases/number-type)

## Properties

### \_docId

> **\_docId**: `string`

Defined in: [packages/bitbadgesjs-sdk/src/api-indexer/base.ts:13](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/api-indexer/base.ts#L13)

A unique stringified document ID

#### Inherited from

[`Doc`](https://docs.bitbadges.io/sdk/reference/interfaces/doc).[`_docId`](https://docs.bitbadges.io/sdk/reference/interfaces/doc#_docid)

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### \_id?

> `optional` **\_id?**: `string`

Defined in: [packages/bitbadgesjs-sdk/src/api-indexer/base.ts:16](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/api-indexer/base.ts#L16)

A unique document ID (Mongo DB ObjectID)

#### Inherited from

[`Doc`](https://docs.bitbadges.io/sdk/reference/interfaces/doc).[`_id`](https://docs.bitbadges.io/sdk/reference/interfaces/doc#_id)

***

### approvalId

> **approvalId**: `string`

Defined in: [packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts:1553](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts#L1553)

The approval ID

***

### approvalLevel

> **approvalLevel**: `""` \| `"collection"` \| `"incoming"` \| `"outgoing"`

Defined in: [packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts:1555](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts#L1555)

The challenge level (i.e. "collection", "incoming", "outgoing")

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### approverAddress

> **approverAddress**: `string`

Defined in: [packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts:1557](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts#L1557)

The approver address (leave blank if approvalLevel = "collection")

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### challengeTrackerId

> **challengeTrackerId**: `string`

Defined in: [packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts:1551](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts#L1551)

The challenge ID

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### collectionId

> **collectionId**: `string`

Defined in: [packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts:1549](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts#L1549)

The collection ID

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### usedLeafIndices

> **usedLeafIndices**: [`iUsedLeafStatus`](https://docs.bitbadges.io/sdk/reference/interfaces/i-used-leaf-status)\<`T`\>[]

Defined in: [packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts:1559](https://github.com/BitBadges/bitbadgesjs/blob/master/packages/bitbadgesjs-sdk/src/api-indexer/docs-types/interfaces.ts#L1559)

The used leaf indices for each challenge. A leaf index is the leaf location in the bottommost layer of the Merkle tree