mirror of https://github.com/status-im/op-geth.git
111 lines
3.2 KiB
Go
111 lines
3.2 KiB
Go
// Copyright 2021 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 consensus
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
|
|
"github.com/ethereum/go-ethereum/core/rawdb"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
)
|
|
|
|
// transitionStatus describes the status of eth1/2 transition. This switch
|
|
// between modes is a one-way action which is triggered by corresponding
|
|
// consensus-layer message.
|
|
type transitionStatus struct {
|
|
LeftPoW bool // The flag is set when the first NewHead message received
|
|
EnteredPoS bool // The flag is set when the first FinalisedBlock message received
|
|
}
|
|
|
|
// Merger is an internal help structure used to track the eth1/2 transition status.
|
|
// It's a common structure can be used in both full node and light client.
|
|
type Merger struct {
|
|
db ethdb.KeyValueStore
|
|
status transitionStatus
|
|
mu sync.RWMutex
|
|
}
|
|
|
|
// NewMerger creates a new Merger which stores its transition status in the provided db.
|
|
func NewMerger(db ethdb.KeyValueStore) *Merger {
|
|
var status transitionStatus
|
|
blob := rawdb.ReadTransitionStatus(db)
|
|
if len(blob) != 0 {
|
|
if err := rlp.DecodeBytes(blob, &status); err != nil {
|
|
log.Crit("Failed to decode the transition status", "err", err)
|
|
}
|
|
}
|
|
return &Merger{
|
|
db: db,
|
|
status: status,
|
|
}
|
|
}
|
|
|
|
// ReachTTD is called whenever the first NewHead message received
|
|
// from the consensus-layer.
|
|
func (m *Merger) ReachTTD() {
|
|
m.mu.Lock()
|
|
defer m.mu.Unlock()
|
|
|
|
if m.status.LeftPoW {
|
|
return
|
|
}
|
|
m.status = transitionStatus{LeftPoW: true}
|
|
blob, err := rlp.EncodeToBytes(m.status)
|
|
if err != nil {
|
|
panic(fmt.Sprintf("Failed to encode the transition status: %v", err))
|
|
}
|
|
rawdb.WriteTransitionStatus(m.db, blob)
|
|
log.Info("Left PoW stage")
|
|
}
|
|
|
|
// FinalizePoS is called whenever the first FinalisedBlock message received
|
|
// from the consensus-layer.
|
|
func (m *Merger) FinalizePoS() {
|
|
m.mu.Lock()
|
|
defer m.mu.Unlock()
|
|
|
|
if m.status.EnteredPoS {
|
|
return
|
|
}
|
|
m.status = transitionStatus{LeftPoW: true, EnteredPoS: true}
|
|
blob, err := rlp.EncodeToBytes(m.status)
|
|
if err != nil {
|
|
panic(fmt.Sprintf("Failed to encode the transition status: %v", err))
|
|
}
|
|
rawdb.WriteTransitionStatus(m.db, blob)
|
|
log.Info("Entered PoS stage")
|
|
}
|
|
|
|
// TDDReached reports whether the chain has left the PoW stage.
|
|
func (m *Merger) TDDReached() bool {
|
|
m.mu.RLock()
|
|
defer m.mu.RUnlock()
|
|
|
|
return m.status.LeftPoW
|
|
}
|
|
|
|
// PoSFinalized reports whether the chain has entered the PoS stage.
|
|
func (m *Merger) PoSFinalized() bool {
|
|
m.mu.RLock()
|
|
defer m.mu.RUnlock()
|
|
|
|
return m.status.EnteredPoS
|
|
}
|