// Copyright 2015 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 downloader

import (
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/ethereum/go-ethereum/eth/ethconfig"
)

// SyncEventType represents the type of sync event
type SyncEventType int

const (
	SyncStarted SyncEventType = iota
	SyncFailed
	SyncCompleted
)

// SyncEvent represents a downloader synchronization event
type SyncEvent struct {
	Type   SyncEventType
	Mode   ethconfig.SyncMode
	Err    error         // Set when Type is SyncFailed
	Latest *types.Header // Set when Type is SyncCompleted
}