From 0cd20804e98256d672e77e7262138f8b18638494 Mon Sep 17 00:00:00 2001
From: Adrian Gallagher <thrasher@addictionsoftware.com>
Date: Sat, 10 Feb 2018 19:13:06 +1100
Subject: [PATCH] Add IsFiatPair function

---
 currency/currency.go      |  5 +++++
 currency/currency_test.go | 22 ++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/currency/currency.go b/currency/currency.go
index 21a3c5e8..747e2154 100644
--- a/currency/currency.go
+++ b/currency/currency.go
@@ -146,6 +146,11 @@ func IsCryptoFiatPair(p pair.CurrencyPair) bool {
 		!IsCryptocurrency(p.FirstCurrency.String()) && IsCryptocurrency(p.SecondCurrency.String())
 }
 
+// IsFiatPair checks to see if the pair is a fiar pair. For example. EURUSD
+func IsFiatPair(p pair.CurrencyPair) bool {
+	return IsFiatCurrency(p.FirstCurrency.String()) && IsFiatCurrency(p.SecondCurrency.String())
+}
+
 // Update updates the local crypto currency or base currency store
 func Update(input []string, cryptos bool) {
 	for x := range input {
diff --git a/currency/currency_test.go b/currency/currency_test.go
index 119bb776..a4202360 100644
--- a/currency/currency_test.go
+++ b/currency/currency_test.go
@@ -199,6 +199,28 @@ func TestIsCryptoFiatPair(t *testing.T) {
 	}
 }
 
+func TestIsFiatPair(t *testing.T) {
+	CryptoCurrencies = []string{"BTC", "LTC", "DASH"}
+	BaseCurrencies = []string{"USD", "AUD", "EUR"}
+
+	if !IsFiatPair(pair.NewCurrencyPair("AUD", "USD")) {
+		t.Error("Test Failed. TestIsFiatPair. Expected true result")
+	}
+
+	if IsFiatPair(pair.NewCurrencyPair("BTC", "AUD")) {
+		t.Error("Test Failed. TestIsFiatPair. Expected false result")
+	}
+}
+
+func TestIsRelatablePairs(t *testing.T) {
+	CryptoCurrencies = []string{"BTC", "XBT", "LTC", "DASH"}
+	BaseCurrencies = []string{"USD", "AUD", "EUR"}
+
+	if !IsRelatablePairs(pair.NewCurrencyPair("XBT", "USD"), pair.NewCurrencyPair("BTC", "USD")) {
+		t.Error("Test Failed. TestIsFiatPair. Expected true result")
+	}
+}
+
 func TestUpdate(t *testing.T) {
 	CryptoCurrencies = []string{"BTC", "LTC", "DASH"}
 	BaseCurrencies = []string{"USD", "AUD"}