config: consolidate ProtocolConfiguration consistency checks

pkg/config/protocol_config_test.go

@@ -0,0 +1,20 @@
+package config
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestProtocolConfigurationValidation(t *testing.T) {
+	p := &ProtocolConfiguration{
+		ValidatorsCount: 1,
+	}
+	require.Error(t, p.Validate())
+	p = &ProtocolConfiguration{
+		NativeUpdateHistories: map[string][]uint32{
+			"someContract": []uint32{0, 10},
+		},
+	}
+	require.Error(t, p.Validate())
+}