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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 (
"fmt"
"time"
"github.com/dexon-foundation/dexon-consensus/common"
"github.com/dexon-foundation/dexon-consensus/core/crypto"
"github.com/dexon-foundation/dexon-consensus/core/types"
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
StateAddDKGMPKReady
StateAddDKGFinal
StateResetDKG
// Configuration related.
StateChangeLambdaBA
StateChangeLambdaDKG
StateChangeRoundLength
StateChangeMinBlockInterval
StateChangeNotarySetSize
// Node set related.
StateAddNode
)
func (t StateChangeType) String() string {
switch t {
case StateChangeNothing:
return "Nothing"
case StateAddCRS:
return "AddCRS"
case StateAddDKGComplaint:
return "AddDKGComplaint"
case StateAddDKGMasterPublicKey:
return "AddDKGMasterPublicKey"
case StateAddDKGMPKReady:
return "AddDKGMPKReady"
case StateAddDKGFinal:
return "AddDKGFinal"
case StateChangeLambdaBA:
return "ChangeLambdaBA"
case StateChangeLambdaDKG:
return "ChangeLambdaDKG"
case StateChangeRoundLength:
return "ChangeRoundLength"
case StateChangeMinBlockInterval:
return "ChangeMinBlockInterval"
case StateChangeNotarySetSize:
return "ChangeNotarySetSize"
case StateAddNode:
return "AddNode"
}
panic(fmt.Errorf("attempting to dump unknown type of state change: %d", t))
}
// 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 StateAddDKGMPKReady:
copied.Payload = CloneDKGMPKReady(req.Payload.(*typesDKG.MPKReady))
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
}
// String dump the state change request into string form.
func (req *StateChangeRequest) String() (ret string) {
ret = fmt.Sprintf("stateChangeRequest{Type:%s", req.Type)
switch req.Type {
case StateChangeNothing:
case StateAddCRS:
crsReq := req.Payload.(*crsAdditionRequest)
ret += fmt.Sprintf(
"Round:%v CRS:%s", crsReq.Round, crsReq.CRS.String()[:6])
case StateAddDKGComplaint:
ret += fmt.Sprintf("%s", req.Payload.(*typesDKG.Complaint))
case StateAddDKGMasterPublicKey:
ret += fmt.Sprintf("%s", req.Payload.(*typesDKG.MasterPublicKey))
case StateAddDKGMPKReady:
ret += fmt.Sprintf("%s", req.Payload.(*typesDKG.MPKReady))
case StateAddDKGFinal:
ret += fmt.Sprintf("%s", req.Payload.(*typesDKG.Finalize))
case StateChangeLambdaBA:
ret += fmt.Sprintf("%v", time.Duration(req.Payload.(uint64)))
case StateChangeLambdaDKG:
ret += fmt.Sprintf("%v", time.Duration(req.Payload.(uint64)))
case StateChangeRoundLength:
ret += fmt.Sprintf("%v", time.Duration(req.Payload.(uint64)))
case StateChangeMinBlockInterval:
ret += fmt.Sprintf("%v", time.Duration(req.Payload.(uint64)))
case StateChangeNotarySetSize:
ret += fmt.Sprintf("%v", req.Payload.(uint32))
case StateAddNode:
ret += fmt.Sprintf(
"%s", types.NewNodeID(req.Payload.(crypto.PublicKey)).String()[:6])
default:
panic(fmt.Errorf(
"attempting to dump unknown type of state change request: %v",
req.Type))
}
ret += "}"
return
}
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