> For the complete documentation index, see [llms.txt](https://even-financial.gitbook.io/developer-center/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://even-financial.gitbook.io/developer-center/marketplace-integrations/mobile-sdks/unified-marketplace/flutter.md).

# Flutter

Unified Flutter Mobile SDK Integration Guide

## Overview

Personal Loans and Credit Cards use the **same Flutter SDK and the same `EngineSDK` widget** — under the hood, it's identical. You choose which product to render by passing the matching `channel`, `zone`, and `productTypes` for your integration.

## Sample Basic Implementation

You cannot pass two bearer tokens to one `EngineSDK` instance. Use separate launches for product-specific tokens, or one token configured for a combined marketplace.

```dart
import 'package:engine_mobile_flutter_sdk/engine_mobile_flutter_sdk.dart';
import 'package:engine_mobile_flutter_sdk/api_models.dart' as engine;

EngineSDK(
  // channel, zone, and productTypes depend on the product you're integrating.
  // Get your channel and zone values from your Partner Manager.
  channel: 'your-channel',
  zone: 'your-zone',
  productTypes: const [engine.ProductType.loan], // or [engine.ProductType.creditCard] for Credit Cards
  onExit: (_) {
    debugPrint("Exit triggered from SDK");
    Navigator.pop(context);
  },
  // ...optional prefill props and event handlers
)
```

## Prepopulating Lead Data

A `bearerToken` is required when using prefill. If your Personal Loans and Credit Cards experiences are configured separately, use the corresponding bearer token for each product.

Pass only the fields you have — omitted fields are collected from the user in-flow. The comment beside each class/field notes which product it applies to.

### Using Bearer Tokens

Each bearer token is associated with a marketplace configuration in Engine. When launching the SDK, the bearer token, `channel`, `zone`, and `productTypes` must all belong to the same configuration.

An `EngineSDK` instance accepts one bearer token:

* For separate Personal Loans and Credit Cards experiences, launch a separate SDK instance with the token and configuration for the selected product.
* For a combined marketplace, use a single token configured for both products and include both values in `productTypes`.
* If you are not using prefill, omit `bearerToken`.

Your Engine representative will provide the appropriate values for each marketplace.

### Fields Available for Prepopulation

<table><thead><tr><th width="230">Class</th><th width="190">Field</th><th width="210">Type</th><th width="150">Applies to</th><th>Notes</th></tr></thead><tbody><tr><td><code>LeadPersonalInformation</code></td><td><code>firstName</code></td><td><code>String?</code></td><td>Both</td><td></td></tr><tr><td></td><td><code>lastName</code></td><td><code>String?</code></td><td>Both</td><td></td></tr><tr><td></td><td><code>email</code></td><td><code>String?</code></td><td>Both</td><td></td></tr><tr><td></td><td><code>dateOfBirth</code></td><td><code>DateTime?</code></td><td>Both</td><td></td></tr><tr><td></td><td><code>primaryPhone</code></td><td><code>String?</code></td><td>Both</td><td>10 digits, no "+" or "-" chars</td></tr><tr><td></td><td><code>address1</code></td><td><code>String?</code></td><td>Both</td><td></td></tr><tr><td></td><td><code>address2</code></td><td><code>String?</code></td><td>Both</td><td>Optional apartment / suite</td></tr><tr><td></td><td><code>city</code></td><td><code>String?</code></td><td>Both</td><td></td></tr><tr><td></td><td><code>state</code></td><td><code>State?</code></td><td>Both</td><td>Enum, 2-letter (e.g. <code>State.DC</code>)</td></tr><tr><td></td><td><code>zipcode</code></td><td><code>String?</code></td><td>Both</td><td></td></tr><tr><td></td><td><code>ssn</code></td><td><code>String?</code></td><td>Personal Loans only</td><td>9 digits, hyphens optional</td></tr><tr><td><code>LeadFinancialInformation</code></td><td><code>annualIncome</code></td><td><code>int?</code></td><td>Both</td><td>Raw integer value (e.g. 20000)</td></tr><tr><td></td><td><code>employmentStatus</code></td><td><code>EmploymentStatus?</code></td><td>Personal Loans only</td><td>Enum</td></tr><tr><td></td><td><code>employmentPayFrequency</code></td><td><code>EmploymentPayFrequency?</code></td><td>Personal Loans only</td><td>Enum</td></tr><tr><td></td><td><code>bankRoutingNumber</code></td><td><code>String?</code></td><td>Personal Loans only</td><td>Exactly 9 digits</td></tr><tr><td></td><td><code>bankAccountNumber</code></td><td><code>String?</code></td><td>Personal Loans only</td><td></td></tr><tr><td><code>LeadCreditInformationJson</code></td><td><code>providedCreditRating</code></td><td><code>ProvidedCreditRating?</code></td><td>Both</td><td>Enum</td></tr><tr><td><code>LeadLoanInformationJson</code></td><td><code>purpose</code></td><td><code>LoanPurpose?</code></td><td>Personal Loans only</td><td>Enum</td></tr><tr><td></td><td><code>loanAmount</code></td><td><code>int?</code></td><td>Personal Loans only</td><td>Whole numbers only</td></tr><tr><td><code>LeadMortgageInformationJson</code></td><td><code>propertyStatus</code></td><td><code>PropertyStatus?</code></td><td>Personal Loans only</td><td>Enum</td></tr><tr><td><code>LeadEmploymentInformationJson</code></td><td><code>directDeposit</code></td><td><code>bool?</code></td><td>Personal Loans only</td><td></td></tr><tr><td><code>LeadLegalInformationJson</code></td><td><code>consentsToSms</code></td><td><code>bool?</code></td><td>Personal Loans only</td><td>Lead agrees to receive SMS</td></tr><tr><td><code>LeadEducationInformationJson</code></td><td><code>educationLevel</code></td><td><code>EducationLevel?</code></td><td>Personal Loans only</td><td>Enum</td></tr><tr><td><code>LeadCreditCardInformationJson</code></td><td><code>cardPurposes</code></td><td><code>List&#x3C;CardPurpose>?</code></td><td>Credit Cards only</td><td>Enum</td></tr></tbody></table>

## Additional Information

For full setup steps, prefill examples, accepted enum values, client tags, and event handlers, see the product-specific guides:

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Personal Loans</strong></td><td>Full Flutter integration guide for the Personal Loans flow.</td><td><a href="/developer-center/marketplace-integrations/mobile-sdks/personal-loans/flutter.md">Flutter</a></td></tr><tr><td><strong>Credit Cards</strong></td><td>Full Flutter integration guide for the Credit Cards flow.</td><td><a href="/developer-center/marketplace-integrations/mobile-sdks/credit-cards/flutter.md">Flutter</a></td></tr></tbody></table>


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