From bf1cd5734e3d69e85a1788a7c8e42cfbd863fe71 Mon Sep 17 00:00:00 2001
From: mrz1836 <mrz1818@gmail.com>
Date: Wed, 30 Sep 2020 19:23:19 -0400
Subject: [PATCH] Added a test case and error case

---
 private_key.go      | 4 ++++
 private_key_test.go | 1 +
 2 files changed, 5 insertions(+)

diff --git a/private_key.go b/private_key.go
index 607024b..e049104 100644
--- a/private_key.go
+++ b/private_key.go
@@ -3,6 +3,7 @@ package bitcoin
 import (
 	"crypto/ecdsa"
 	"encoding/hex"
+	"errors"
 	"math/big"
 
 	"github.com/bitcoinsv/bsvd/bsvec"
@@ -10,6 +11,9 @@ import (
 
 // PrivateKeyFromString turns a private key (hex encoded string) into an bsvec.PrivateKey
 func PrivateKeyFromString(privateKey string) (*bsvec.PrivateKey, error) {
+	if len(privateKey) == 0 {
+		return nil, errors.New("privateKey is missing")
+	}
 	privateKeyBytes, err := hex.DecodeString(privateKey)
 	if err != nil {
 		return nil, err
diff --git a/private_key_test.go b/private_key_test.go
index 7eb4100..1286ca5 100644
--- a/private_key_test.go
+++ b/private_key_test.go
@@ -89,6 +89,7 @@ func TestPrivateKeyFromString(t *testing.T) {
 		{"E83385AF76B2B1997326B567461FB73DD9C27EAB9E1E86D26779F", "", true, true},
 		{"1234567", "", true, true},
 		{"0", "", true, true},
+		{"", "", true, true},
 	}
 
 	// Run tests