From 4a59bdf15ab30c37d62696d325f2140d79ac7034 Mon Sep 17 00:00:00 2001
From: Daniel Liu <liudaniel@qq.com>
Date: Fri, 14 Jul 2023 11:23:08 +0800
Subject: [PATCH] add function IsZero for type Address

---
 common/types.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/types.go b/common/types.go
index 72234a226b..905c7d5a4e 100644
--- a/common/types.go
+++ b/common/types.go
@@ -193,6 +193,9 @@ func IsHexAddress(s string) bool {
 	return len(s) == 2*AddressLength && isHex(s)
 }
 
+// IsZero returns if a address is empty
+func (a Address) IsZero() bool { return a == Address{} }
+
 // Get the string representation of the underlying address
 func (a Address) Str() string   { return string(a[:]) }
 func (a Address) Bytes() []byte { return a[:] }