# Display Dwolla funding sources

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## Display Dwolla funding sources

### 1. Define the smart collection

Filterable fields are flagged using `isFilterable: true`. You will need to enable this option using the collection settings in the [Layout Editor](https://docs.forestadmin.com/user-guide/getting-started/master-your-ui/using-the-layout-editor-mode).

Funding Sources have the `onlyForRelationships` enabled: it means that these 2 collections are only accessible via the Dwolla customer relationships.

```javascript
// forest/dwolla-funding-sources.js
const { collection } = require('forest-express-sequelize');

collection('dwollaFundingSources', {
  onlyForRelationships: true,
  actions: [],
  fields: [
    {
      field: 'id',
      type: 'String',
    },
    {
      field: 'status',
      type: 'Enum',
      enums: ['unverified', 'verified'],
    },
    {
      field: 'type',
      type: 'Enum',
      enums: ['bank', 'balance'],
    },
    {
      field: 'bankAccountType',
      type: 'Enum',
      enums: ['checking', 'savings', 'general-ledger', 'loan'],
    },
    {
      field: 'name',
      type: 'String',
    },
    {
      field: 'balance',
      type: 'Json',
    },
    {
      field: 'balanceReadable',
      type: 'String',
      get: (fundingSource) => {
        if (!fundingSource.balance) return null;
        var formatter = new Intl.NumberFormat('en-US', {
          style: 'currency',
          currency: fundingSource.balance.currency,
        });
        return formatter.format(fundingSource.balance.value);
      },
    },
    {
      field: 'removed',
      type: 'Boolean',
    },
    {
      field: 'channels',
      type: ['String'],
    },
    {
      field: 'bankName',
      type: 'String',
    },
    {
      field: 'fingerprint',
      type: 'String',
    },
    {
      field: 'created', //created_at
      type: 'Date',
    },
  ],
  segments: [],
});
```

### 2. Implement the route

This route use the Dwolla service described in [another section](https://docs.forestadmin.com/documentation/reference-guide/integrations/dwolla/dwolla-service).

```javascript
// routes/funding-sources.js
const express = require('express');
const {
  PermissionMiddlewareCreator,
  RecordSerializer,
} = require('forest-express-sequelize');

const DwollaService = require('../services/dwolla-service');
let dwollaService = new DwollaService(
  process.env.DWOLLA_APP_KEY,
  process.env.DWOLLA_APP_SECRET,
  process.env.DWOLLA_ENVIRONMENT
);

const MODEL_NAME = 'dwollaFundingSources';

const router = express.Router();
const permissionMiddlewareCreator = new PermissionMiddlewareCreator(
  `${MODEL_NAME}`
);

// Get a FundingSource
router.get(
  `/${MODEL_NAME}/:recordId`,
  permissionMiddlewareCreator.details(),
  (request, response, next) => {
    const recordId = request.params.recordId;
    dwollaService
      .getFundingSource(recordId)
      .then(async (record) => {
        const recordSerializer = new RecordSerializer({ name: MODEL_NAME });
        const recordSerialized = await recordSerializer.serialize(record);
        response.send(recordSerialized);
      })
      .catch(next);
  }
);

module.exports = router;
```