// Copyright 2018 The dexon-consensus-core Authors
// This file is part of the dexon-consensus-core library.
//
// The dexon-consensus-core 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 dexon-consensus-core 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 dexon-consensus-core library. If not, see
// <http://www.gnu.org/licenses/>.

package types

// ConfigurationChangeEventType specifies the action of a membership event.
type ConfigurationChangeEventType int

// Event enums.
const (
	KChanged ConfigurationChangeEventType = iota
	MembershipAdd
	MembershipRemove
)

// IntegerEventPayload is a general payload for integer type value.
type IntegerEventPayload struct {
	Value int64
}

// MembershipEventPayload is the payload type for membership event.
type MembershipEventPayload struct {
	ID       ValidatorID
	Evidence []byte
}

// ConfigurationChangeEvent specifies the event of membership changes.
type ConfigurationChangeEvent struct {
	Epoch   int
	Event   ConfigurationChangeEventType
	Payload interface{}
}