First basic code for currency exchange rate routines.

app/Models/CurrencyExchangeRate.php

@@ -0,0 +1,53 @@
+<?php
+/**
+ * CurrencyExchange.php
+ * Copyright (c) 2017 thegrumpydictator@gmail.com
+ * This software may be modified and distributed under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License.
+ *
+ * See the LICENSE file for details.
+ */
+
+declare(strict_types=1);
+
+namespace FireflyIII\Models;
+
+
+use FireflyIII\User;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * Class CurrencyExchange
+ *
+ * @package FireflyIII\Models
+ */
+class CurrencyExchangeRate extends Model
+{
+
+    protected $dates = ['created_at', 'updated_at', 'date'];
+
+    /**
+     * @return BelongsTo
+     */
+    public function fromCurrency(): BelongsTo
+    {
+        return $this->belongsTo(TransactionCurrency::class, 'from_currency_id');
+    }
+
+    /**
+     * @return BelongsTo
+     */
+    public function toCurrency(): BelongsTo
+    {
+        return $this->belongsTo(TransactionCurrency::class, 'to_currency_id');
+    }
+
+    /**
+     * @return BelongsTo
+     */
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+}