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// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus 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 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 library. If not, see
// <http://www.gnu.org/licenses/>.
package test
import (
"time"
"github.com/dexon-foundation/dexon-consensus/common"
"github.com/dexon-foundation/dexon-consensus/core/crypto"
typesDKG "github.com/dexon-foundation/dexon-consensus/core/types/dkg"
"github.com/dexon-foundation/dexon/rlp"
)
// StateChangeType is the type of state change request.
type StateChangeType uint8
// Types of state change.
const (
StateChangeNothing StateChangeType = iota
// DKG & CRS
StateAddCRS
StateAddDKGComplaint
StateAddDKGMasterPublicKey
StateAddDKGFinal
// Configuration related.
StateChangeNumChains
StateChangeLambdaBA
StateChangeLambdaDKG
StateChangeRoundInterval
StateChangeMinBlockInterval
StateChangeMaxBlockInterval
StateChangeK
StateChangePhiRatio
StateChangeNotarySetSize
StateChangeDKGSetSize
// Node set related.
StateAddNode
)
// StateChangeRequest carries information of state change request.
type StateChangeRequest struct {
Type StateChangeType `json:"type"`
Payload interface{} `json:"payload"`
// The purpose of these fields are aiming to provide an unique ID for each
// change request.
Hash common.Hash
Timestamp uint64
}
// this structure is mainly for marshalling for StateChangeRequest.
type rawStateChangeRequest struct {
Type StateChangeType
Payload rlp.RawValue
Hash common.Hash
Timestamp uint64
}
// NewStateChangeRequest constructs an StateChangeRequest instance.
func NewStateChangeRequest(
t StateChangeType, payload interface{}) *StateChangeRequest {
now := uint64(time.Now().UTC().UnixNano())
b, err := rlp.EncodeToBytes(struct {
Type StateChangeType
Payload interface{}
Timestamp uint64
}{t, payload, now})
if err != nil {
panic(err)
}
return &StateChangeRequest{
Hash: crypto.Keccak256Hash(b),
Type: t,
Payload: payload,
Timestamp: now,
}
}
// Clone a StateChangeRequest instance.
func (req *StateChangeRequest) Clone() (copied *StateChangeRequest) {
copied = &StateChangeRequest{
Type: req.Type,
Hash: req.Hash,
Timestamp: req.Timestamp,
}
// NOTE: The cloned DKGx structs would be different from sources in binary
// level, thus would produce different hash from the source.
// I don't want different hash for source/copied requests thus would
// copy the hash from source directly.
switch req.Type {
case StateAddNode:
srcBytes := req.Payload.([]byte)
copiedBytes := make([]byte, len(srcBytes))
copy(copiedBytes, srcBytes)
req.Payload = copiedBytes
case StateAddCRS:
crsReq := req.Payload.(*crsAdditionRequest)
copied.Payload = &crsAdditionRequest{
Round: crsReq.Round,
CRS: crsReq.CRS,
}
case StateAddDKGFinal:
copied.Payload = cloneDKGFinalize(req.Payload.(*typesDKG.Finalize))
case StateAddDKGMasterPublicKey:
copied.Payload = cloneDKGMasterPublicKey(
req.Payload.(*typesDKG.MasterPublicKey))
case StateAddDKGComplaint:
copied.Payload = cloneDKGComplaint(req.Payload.(*typesDKG.Complaint))
default:
copied.Payload = req.Payload
}
return
}
// Equal checks equality between two StateChangeRequest.
func (req *StateChangeRequest) Equal(other *StateChangeRequest) error {
if req.Hash == other.Hash {
return nil
}
return ErrStatePendingChangesNotEqual
}
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