First set of data mappers.

app/Import/Mapper/TransactionCurrencies.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * TransactionCurrencies.php
+ * Copyright (C) 2016 thegrumpydictator@gmail.com
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+declare(strict_types = 1);
+
+namespace FireflyIII\Import\Mapper;
+
+use FireflyIII\Models\TransactionCurrency as TC;
+
+/**
+ * Class TransactionCurrencies
+ *
+ * @package FireflyIII\Import\Mapper
+ */
+class TransactionCurrencies implements MapperInterface
+{
+
+    /**
+     * @return array
+     */
+    public function getMap(): array
+    {
+        $currencies = TC::get();
+        $list       = [];
+        foreach ($currencies as $currency) {
+            $list[$currency->id] = $currency->name . ' (' . $currency->code . ')';
+        }
+
+        asort($list);
+
+        $list = [0 => trans('csv.do_not_map')] + $list;
+
+        return $list;
+
+    }
+}