types: add ValidateNonZeroAddress utility function (#1033)

* Add ValidateNonZeroAddress validation utility

* Update types/validation.go

Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

types/validation.go

@@ -29,6 +29,18 @@ func ValidateAddress(address string) error {
 	return nil
 }
 
+// ValidateNonZeroAddress returns an error if the provided string is not a hex
+// formatted string address or is equal to zero
+func ValidateNonZeroAddress(address string) error {
+	if IsZeroAddress(address) {
+		return sdkerrors.Wrapf(
+			sdkerrors.ErrInvalidAddress, "address '%s' must not be zero",
+			address,
+		)
+	}
+	return ValidateAddress(address)
+}
+
 // SafeInt64 checks for overflows while casting a uint64 to int64 value.
 func SafeInt64(value uint64) (int64, error) {
 	if value > uint64(math.MaxInt64) {

types/validation_test.go

@@ -85,6 +85,37 @@ func TestValidateAddress(t *testing.T) {
 	}
 }
 
+func TestValidateNonZeroAddress(t *testing.T) {
+	testCases := []struct {
+		name     string
+		address  string
+		expError bool
+	}{
+		{
+			"empty string", "", true,
+		},
+		{
+			"invalid address", "0x", true,
+		},
+		{
+			"zero address", common.Address{}.String(), true,
+		},
+		{
+			"valid address", tests.GenerateAddress().Hex(), false,
+		},
+	}
+
+	for _, tc := range testCases {
+		err := ValidateNonZeroAddress(tc.address)
+
+		if tc.expError {
+			require.Error(t, err, tc.name)
+		} else {
+			require.NoError(t, err, tc.name)
+		}
+	}
+}
+
 func TestSafeInt64(t *testing.T) {
 	testCases := []struct {
 		name     string