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// 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/>.
// TODO(jimmy-dexon): remove those comments before open source.
package core
import (
"sync"
"time"
"github.com/dexon-foundation/dexon-consensus-core/common"
"github.com/dexon-foundation/dexon-consensus-core/core/blockdb"
"github.com/dexon-foundation/dexon-consensus-core/core/types"
)
type pendingAck struct {
receivedTime time.Time
}
type compactionChain struct {
db blockdb.Reader
pendingAckLock sync.RWMutex
pendingAck map[common.Hash]*pendingAck
prevBlockLock sync.RWMutex
prevBlock *types.Block
witnessAcksLock sync.RWMutex
}
func newCompactionChain(
db blockdb.Reader,
) *compactionChain {
return &compactionChain{
db: db,
pendingAck: make(map[common.Hash]*pendingAck),
}
}
func (cc *compactionChain) sanityCheck(witnessBlock *types.Block) error {
return nil
}
// TODO(jimmy-dexon): processBlock can be extraced to
// another struct.
func (cc *compactionChain) processBlock(block *types.Block) error {
prevBlock := cc.lastBlock()
if prevBlock != nil {
block.Witness.Height = prevBlock.Witness.Height + 1
}
cc.prevBlockLock.Lock()
defer cc.prevBlockLock.Unlock()
cc.prevBlock = block
return nil
}
func (cc *compactionChain) lastBlock() *types.Block {
cc.prevBlockLock.RLock()
defer cc.prevBlockLock.RUnlock()
return cc.prevBlock
}
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