keypair err mgt + shorturl random improve

contactcard_test.go

@@ -8,9 +8,18 @@ import (
 )
 
 func TestCompressAndJson(t *testing.T) {
-	kp1 := NewKeyPair()
-	kp2 := NewKeyPair()
-	kp3 := NewKeyPair()
+	kp1, err := NewKeyPair()
+	if err != nil {
+		t.Fatal(err)
+	}
+	kp2, err := NewKeyPair()
+	if err != nil {
+		t.Fatal(err)
+	}
+	kp3, err := NewKeyPair()
+	if err != nil {
+		t.Fatal(err)
+	}
 	var cc ContactCard
 	cc.Name = "My Full Name And It's loooong"
 	cc.ContactPublicKey = kp1.Public