From 0f6af3be53e80f124a9c7d9294cccf8b4d1c272a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=93scar=20N=C3=A1jera?= <hi@oscarnajera.com>
Date: Sat, 3 Apr 2021 20:35:06 +0200
Subject: Define FieldElement addition

---
 ecc.hs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 ecc.hs

diff --git a/ecc.hs b/ecc.hs
new file mode 100644
index 0000000..6271864
--- /dev/null
+++ b/ecc.hs
@@ -0,0 +1,15 @@
+
+data FieldElement =
+  FieldElement
+    { number :: Int
+    , prime :: Int
+    }
+  deriving (Eq)
+
+instance Show FieldElement where
+  show a = "FieldElement_" ++ show (prime a) ++ " " ++ show (number a)
+
+add :: FieldElement -> FieldElement -> FieldElement
+add (FieldElement a b) (FieldElement c d)
+  | b /= d = error "Distinct Fields"
+  | otherwise = FieldElement (mod (a + c) b) b
-- 
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