// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// 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.

//! This passes its input to `call_runtime` and returns the return value to its caller.
#![no_std]
#![no_main]

use common::input;
use uapi::{HostFn, HostFnImpl as api};

#[no_mangle]
#[polkavm_derive::polkavm_export]
pub extern "C" fn deploy() {}

#[no_mangle]
#[polkavm_derive::polkavm_export]
pub extern "C" fn call() {
	// Fixture calls should fit into 100 bytes.
	input!(100, call: [u8], );

	// Use the call passed as input to call the runtime.
	let err_code = match api::call_runtime(call) {
		Ok(_) => 0u32,
		Err(code) => code as u32,
	};

	api::return_value(uapi::ReturnFlags::empty(), &err_code.to_le_bytes());
}