# Attribution.getSchemaId

Determines the schema ID for an [`Attribution.Attribution`](/ercs/erc8021/Attribution/types#attribution).

## Imports

:::code-group
```ts [Named]
import { Attribution } from 'ox/erc8021'
```

```ts [Entrypoint]
import * as Attribution from 'ox/erc8021/Attribution'
```
:::

## Examples

```ts twoslash
import { Attribution } from 'ox/erc8021'

const schemaId = Attribution.getSchemaId({
  codes: ['baseapp']
})
// @log: 0

const schemaId2 = Attribution.getSchemaId({
  codes: ['baseapp'],
  codeRegistry: {
    address: '0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045',
    chainId: 8453
  }
})
// @log: 1

const schemaId3 = Attribution.getSchemaId({
  appCode: 'baseapp'
})
// @log: 2
```

## Definition

```ts
function getSchemaId(
  attribution: Attribution.Attribution,
): SchemaId
```

**Source:** [src/erc8021/Attribution.ts](https://github.com/wevm/ox/blob/main/src/erc8021/Attribution.ts#L517)

## Parameters

### attribution

* **Type:** [`Attribution.Attribution`](/ercs/erc8021/Attribution/types#attributionattribution)

The attribution object.

#### attribution.appCode

* **Type:** `string`
* **Optional**

Application attribution code.

#### attribution.codeRegistry

* **Type:** `AttributionSchemaId1Registry`

#### attribution.codes

* **Type:** `readonly string[]`

Attribution codes identifying entities involved in the transaction.

#### attribution.id

* **Type:** `2`
* **Optional**

Schema identifier (2 for CBOR-encoded).

#### attribution.metadata

* **Type:** `Record`
* **Optional**

Arbitrary metadata key-value pairs.

#### attribution.registries

* **Type:** `AttributionSchemaId2Registries`
* **Optional**

Custom code registries keyed by entity type.

#### attribution.serviceCodes

* **Type:** `readonly string[]`
* **Optional**

Service codes identifying additional service providers (e.g., block builders, relayers, solvers).

#### attribution.walletCode

* **Type:** `string`
* **Optional**

Wallet attribution code.

## Return Type

The schema ID (0 for canonical registry, 1 for custom registry, 2 for CBOR-encoded).

[`SchemaId`](/ercs/erc8021/Attribution/types#attributionschemaid)