# verifyRequirement(\[payload,])

On success, if the requirement belongs to a program/campaign objective, ChainVine will asynchronously check whether the user has completed enough requirements to mark an objective as completed.

```typescript
const campaignId = '02jd020jkd-302jdi2d-02ij0dj';

const requirementId = 'Hiodn2oD2dkmo2';

const verify = await userClient.verifyRequirement(
   {
      id: requirementId,
      campaign: {
         id: campaignId
      }
   }
)
```

## Params

<table><thead><tr><th width="180">Field</th><th width="141">Required</th><th width="133">Type</th><th>Description</th></tr></thead><tbody><tr><td>campaign.id</td><td>required</td><td>String</td><td>the id of the program/campaign the requirement belongs to<br>Note: this campaign/program must belong to your account</td></tr><tr><td>id</td><td>required</td><td>String</td><td>the referral program/campaign requirement id</td></tr></tbody></table>

## **Response**

***UserRequirementResponse***

<table><thead><tr><th width="180">Field</th><th width="141">Type</th><th>Description</th></tr></thead><tbody><tr><td>id</td><td>String</td><td>the referral program/campaign requirement id</td></tr><tr><td>completed</td><td>Boolean</td><td>a boolean representing if the user has completed the requirement or not</td></tr></tbody></table>

## Examples

{% tabs %}
{% tab title="Browser" %}
In this approach, we complete a requirement ad-hoc for a user, by passing in a referrer\_id if one has been captured by a referral link beforehand.

If the referrer id is passed into the request, and no referral has ever been made between this user and any referrer, then a Referral will be created.

```typescript
import { ChainvineClient, getReferrerId } from '@chainvine/sdk';

const userWalletAddress = '0x293kdo0ij0';

const campaignId = 'aSlug123';

// Generate your ChainvineClient instance
const client = new ChainvineClient(); //Make sure to whitelist your domain

const requirementId = 'Hiodn2oD2dkmo2';

const userClient = await client.syncUser(userWalletAddress);

const completion = await userClient.verifyRequirement({
    campaign: {
        id: campaignId
    },
    id: requirementId,
});

```

{% endtab %}

{% tab title="Server" %}
In this approach, we complete a requirement ad-hoc for a user, by passing in a referrer\_id if one has been captured by a referral link beforehand.

If the referrer id is passed into the request, and no referral has ever been made between this user and any referrer, then a Referral will be created.

```typescript
import { ChainvineClient } from '@chainvine/sdk';

const userWalletAddress = '0x293kdo0ij0';

const campaignId = '02jd020jkd-302jdi2d-02ij0dj';

// Generate your ChainvineClient instance
const client = new ChainvineClient({
    apiKey: '0dj03j000d'  // Your API Key
});

const requirementId = 'Hiodn2oD2dkmo2';

const userClient = await client.syncUser(userWalletAddress);

const completion = await userClient.verifyRequirement({
    campaign: {
        id: campaignId
    },
    id: requirementId,
});

```

{% endtab %}
{% endtabs %}


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