// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package protocols

import (
	"fmt"

	"github.com/XinFinOrg/XDPoSChain/p2p/discover"
)

// handshake message type
type hs0 struct {
	C uint
}

// message to kill/drop the peer with nodeID
type kill struct {
	C discover.NodeID
}

// message to drop connection
type drop struct {
}

// / protoHandshake represents module-independent aspects of the protocol and is
// the first message peers send and receive as part the initial exchange
type protoHandshake struct {
	Version   uint   // local and remote peer should have identical version
	NetworkID string // local and remote peer should have identical network id
}

// checkProtoHandshake verifies local and remote protoHandshakes match
func checkProtoHandshake(testVersion uint, testNetworkID string) func(interface{}) error {
	return func(rhs interface{}) error {
		remote := rhs.(*protoHandshake)
		if remote.NetworkID != testNetworkID {
			return fmt.Errorf("%s (!= %s)", remote.NetworkID, testNetworkID)
		}

		if remote.Version != testVersion {
			return fmt.Errorf("%d (!= %d)", remote.Version, testVersion)
		}
		return nil
	}
}