Add Apache License header to precompiles.rs

runtime/mainnet/src/precompiles.rs

@@ -1,3 +1,18 @@
+// This file is part of Tangle.
+// Copyright (C) 2022-2024 Tangle Foundation.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
 use frame_support::parameter_types;
 use pallet_evm_precompile_balances_erc20::{Erc20BalancesPrecompile, Erc20Metadata};
 use pallet_evm_precompile_batch::BatchPrecompile;