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stateful_validator.go
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/
stateful_validator.go
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// SPDX-License-Identifier: LGPL-3.0-or-later
// Copyright 2019 DNA Dev team
//
/*
* Copyright (C) 2018 The ontology Authors
* This file is part of The ontology library.
*
* The ontology 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 ontology 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 ontology. If not, see <http://www.gnu.org/licenses/>.
*/
package stateful
import (
"github.com/DNAProject/DNA/common/log"
"github.com/DNAProject/DNA/core/ledger"
"github.com/DNAProject/DNA/core/types"
"github.com/DNAProject/DNA/errors"
"github.com/DNAProject/DNA/validator/db"
vatypes "github.com/DNAProject/DNA/validator/types"
"github.com/ontio/ontology-eventbus/actor"
"reflect"
)
// Validator is an interface for tx validation actor
type Validator interface {
Register(poolId *actor.PID)
UnRegister(poolId *actor.PID)
VerifyType() vatypes.VerifyType
}
type validator struct {
pid *actor.PID
id string
bestBlock db.BestBlock
}
// NewValidator returns Validator for stateful check of tx
func NewValidator(id string) (Validator, error) {
validator := &validator{id: id}
props := actor.FromProducer(func() actor.Actor {
return validator
})
pid, err := actor.SpawnNamed(props, id)
validator.pid = pid
return validator, err
}
func (self *validator) Receive(context actor.Context) {
switch msg := context.Message().(type) {
case *actor.Started:
log.Info("stateful-validator: started and be ready to receive txn")
case *actor.Stopping:
log.Info("stateful-validator: stopping")
case *actor.Restarting:
log.Info("stateful-validator: restarting")
case *vatypes.CheckTx:
log.Debugf("stateful-validator: receive tx %x", msg.Tx.Hash())
sender := context.Sender()
height := ledger.DefLedger.GetCurrentBlockHeight()
errCode := errors.ErrNoError
hash := msg.Tx.Hash()
exist, err := ledger.DefLedger.IsContainTransaction(hash)
if err != nil {
log.Warn("query db error:", err)
errCode = errors.ErrUnknown
} else if exist {
errCode = errors.ErrDuplicatedTx
}
response := &vatypes.CheckResponse{
WorkerId: msg.WorkerId,
Type: self.VerifyType(),
Hash: msg.Tx.Hash(),
Height: height,
ErrCode: errCode,
}
sender.Tell(response)
case *vatypes.UnRegisterAck:
context.Self().Stop()
case *types.Block:
//bestBlock, _ := self.db.GetBestBlock()
//if bestBlock.Height+1 < msg.Header.Height {
// // add sync block request
//} else if bestBlock.Height+1 == msg.Header.Height {
// self.db.PersistBlock(msg)
//}
default:
log.Info("stateful-validator: unknown msg ", msg, "type", reflect.TypeOf(msg))
}
}
func (self *validator) VerifyType() vatypes.VerifyType {
return vatypes.Stateful
}
func (self *validator) Register(poolId *actor.PID) {
poolId.Tell(&vatypes.RegisterValidator{
Sender: self.pid,
Type: self.VerifyType(),
Id: self.id,
})
}
func (self *validator) UnRegister(poolId *actor.PID) {
poolId.Tell(&vatypes.UnRegisterValidator{
Id: self.id,
})
}