feat(server): api endpoint to get Plaid link token

packages/server/src/services/Banking/Plaid/PlaidApplication.ts

@@ -0,0 +1,18 @@
+import { Inject, Service } from 'typedi';
+import { PlaidLinkTokenService } from './PlaidLinkToken';
+
+@Service()
+export class PlaidApplication {
+  @Inject()
+  private getLinkTokenService: PlaidLinkTokenService;
+
+  /**
+   * 
+   * @param tenantId 
+   * @param itemId 
+   * @returns 
+   */
+  public getLinkToken(tenantId: number) {
+    return this.getLinkTokenService.getLinkToken(tenantId);
+  }
+}

packages/server/src/services/Banking/Plaid/PlaidLinkToken.ts

@@ -0,0 +1,37 @@
+import { PlaidClientWrapper } from '@/lib/Plaid';
+import { Service } from 'typedi';
+
+@Service()
+export class PlaidLinkTokenService {
+  /**
+   * Retrieves the plaid link token.
+   * @param {number} tenantId
+   * @returns
+   */
+  async getLinkToken(tenantId: number) {
+    const accessToken = null;
+
+    // must include transactions in order to receive transactions webhooks
+    const products = ['transactions'];
+    const linkTokenParams = {
+      user: {
+        // This should correspond to a unique id for the current user.
+        client_user_id: 'uniqueId' + tenantId,
+      },
+      client_name: 'Pattern',
+      products,
+      country_codes: ['US'],
+      language: 'en',
+      // webhook: httpTunnel.public_url + '/services/webhook',
+      access_token: accessToken,
+    };
+    // If user has entered a redirect uri in the .env file
+    // if (redirect_uri.indexOf('http') === 0) {
+    //   linkTokenParams.redirect_uri = redirect_uri;
+    // }
+    const plaidInstance = new PlaidClientWrapper();
+    const createResponse = await plaidInstance.linkTokenCreate(linkTokenParams);
+
+    return createResponse.data;
+  }
+}