Pass transactions cursor when fetching plaid transactions

app/models/plaid_account/importer.rb

@@ -5,12 +5,10 @@ class PlaidAccount::Importer
   end
 
   def import
-    PlaidAccount.transaction do
-      import_account_info
-      import_transactions if account_snapshot.transactions_data.present?
-      import_investments if account_snapshot.investments_data.present?
-      import_liabilities if account_snapshot.liabilities_data.present?
-    end
+    import_account_info
+    import_transactions if account_snapshot.transactions_data.present?
+    import_investments if account_snapshot.investments_data.present?
+    import_liabilities if account_snapshot.liabilities_data.present?
   end
 
   private

app/models/plaid_item/accounts_snapshot.rb

@@ -20,6 +20,11 @@ class PlaidItem::AccountsSnapshot
     )
   end
 
+  def transactions_cursor
+    return nil unless transactions_data
+    transactions_data.cursor
+  end
+
   private
     attr_reader :plaid_item, :plaid_provider
 
@@ -68,7 +73,11 @@ class PlaidItem::AccountsSnapshot
 
     def transactions_data
       return nil unless can_fetch_transactions?
-      @transactions_data ||= plaid_provider.get_transactions(plaid_item.access_token)
+
+      @transactions_data ||= plaid_provider.get_transactions(
+        plaid_item.access_token,
+        next_cursor: plaid_item.next_cursor
+      )
     end
 
     def can_fetch_investments?

app/models/plaid_item/importer.rb

@@ -39,15 +39,20 @@ class PlaidItem::Importer
     def fetch_and_import_accounts_data
       snapshot = PlaidItem::AccountsSnapshot.new(plaid_item, plaid_provider: plaid_provider)
 
-      snapshot.accounts.each do |raw_account|
-        plaid_account = plaid_item.plaid_accounts.find_or_initialize_by(
-          plaid_id: raw_account.account_id
-        )
+      PlaidItem.transaction do
+        snapshot.accounts.each do |raw_account|
+          plaid_account = plaid_item.plaid_accounts.find_or_initialize_by(
+            plaid_id: raw_account.account_id
+          )
 
-        PlaidAccount::Importer.new(
-          plaid_account,
-          account_snapshot: snapshot.get_account_data(raw_account.account_id)
-        ).import
+          PlaidAccount::Importer.new(
+            plaid_account,
+            account_snapshot: snapshot.get_account_data(raw_account.account_id)
+          ).import
+        end
+
+        # Once we know all data has been imported, save the cursor to avoid re-fetching the same data next time
+        plaid_item.update!(next_cursor: snapshot.transactions_cursor)
       end
     end
 end