> For the complete documentation index, see [llms.txt](https://docs.openpassport.app/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openpassport.app/docs/technical-docs/sdk-class/openpassportverifier.md).

# OpenPassportVerifier

The `OpenPassportVerifier` class is designed to facilitate the verification of user credentials and disclosures in applications using the OpenPassport system. It supports various modes of operation, allowing for both on-chain and off-chain proof verification. The class provides methods to configure verification parameters such as minimum age, nationality, and OFAC checks, and to generate intents for user interactions.

#### Parameters

| Parameter | Type     | Description                                                            |
| --------- | -------- | ---------------------------------------------------------------------- |
| `mode`    | `Mode`   | The mode of operation, determining the type of proof verification.     |
| `scope`   | `string` | An identifier for the application, used to distinguish different apps. |

#### Functions

| Function                     | Parameters                                                                                                         | Description                                                                                                                  | Output                                |
| ---------------------------- | ------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------- | ------------------------------------- |
| `setMinimumAge`              | `age: number`                                                                                                      | Sets the minimum age requirement for verification. Throws an error if age is less than 10 or more than 100.                  | `this`                                |
| `setNationality`             | `country: (typeof countryNames)[number]`                                                                           | Sets the nationality requirement for verification.                                                                           | `this`                                |
| `discloseNationality`        | None                                                                                                               | Sets nationality to 'Any', allowing disclosure of any nationality.                                                           | `this`                                |
| `excludeCountries`           | `...countries: (typeof countryNames)[number][]`                                                                    | Excludes specified countries from verification.                                                                              | `this`                                |
| `enableOFACCheck`            | None                                                                                                               | Enables OFAC (Office of Foreign Assets Control) check for verification.                                                      | `this`                                |
| `setModalServerUrl`          | `modalServerUrl: string`                                                                                           | Sets the URL for the modal server used in verification.                                                                      | `this`                                |
| `setCommitmentMerkleTreeUrl` | `commitmentMerkleTreeUrl: string`                                                                                  | Sets the URL for the commitment Merkle tree, required for 'register' mode.                                                   | `this`                                |
| `setRpcUrl`                  | `rpcUrl: string`                                                                                                   | Sets the RPC URL for on-chain operations.                                                                                    | `this`                                |
| `allowMockPassports`         | None                                                                                                               | Enables the use of mock passports for testing purposes.                                                                      | `this`                                |
| `getIntent`                  | `appName: string, userId: string, userIdType: UserIdType, sessionId: string, websocketUrl: string = WEBSOCKET_URL` | Generates an intent string for user interaction, encoding the necessary verification parameters. Used by OpenPassportQRcode. | `string`                              |
| `verifyProof`                | `proof: OpenPassportAttestation`                                                                                   | Verifies a proof against the configured verification parameters.                                                             | `Promise<OpenPassportVerifierReport>` |