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retrievedb.go
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retrievedb.go
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// Copyright Fuzamei Corp. 2018 All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package executor
import (
//"bytes"
"github.com/33cn/chain33/account"
"github.com/33cn/chain33/common/address"
dbm "github.com/33cn/chain33/common/db"
"github.com/33cn/chain33/types"
//log "github.com/33cn/chain33/common/log/log15"
"github.com/33cn/chain33/system/dapp"
rt "github.com/aBitcoinDiamond/slave/executor/retrieve/types"
)
const (
retrieveBackup = 1
retrievePrepare = 2
retrievePerform = 3
retrieveCancel = 4
)
// MaxRelation when backup
const MaxRelation = 10
// DB def
type DB struct {
rt.Retrieve
}
// NewDB instance
func NewDB(backupaddress string) *DB {
r := &DB{}
r.BackupAddress = backupaddress
return r
}
// RelateDB on retrieve action
func (r *DB) RelateDB(defaultAddress string, createTime int64, delayPeriod int64) bool {
if len(r.RetPara) >= MaxRelation {
return false
}
rlog.Debug("RetrieveBackup", "RelateDB", defaultAddress)
para := &rt.RetrievePara{DefaultAddress: defaultAddress, Status: retrieveBackup, CreateTime: createTime, PrepareTime: 0, DelayPeriod: delayPeriod}
r.RetPara = append(r.RetPara, para)
return true
}
// UnRelateDB on retrieve action
func (r *DB) UnRelateDB(index int) bool {
r.RetPara = append(r.RetPara[:index], r.RetPara[index+1:]...)
return true
}
// CheckRelation on retrieve action
func (r *DB) CheckRelation(defaultAddress string) (int, bool) {
for i := 0; i < len(r.RetPara); i++ {
if r.RetPara[i].DefaultAddress == defaultAddress {
return i, true
}
}
return MaxRelation, false
}
// GetKVSet for retrieve
func (r *DB) GetKVSet() (kvset []*types.KeyValue) {
value := types.Encode(&r.Retrieve)
kvset = append(kvset, &types.KeyValue{Key: Key(r.BackupAddress), Value: value})
return kvset
}
// Save KV
func (r *DB) Save(db dbm.KV) {
set := r.GetKVSet()
for i := 0; i < len(set); i++ {
db.Set(set[i].GetKey(), set[i].Value)
}
}
// Key for retrieve
func Key(address string) (key []byte) {
key = append(key, []byte("mavl-retrieve-")...)
key = append(key, address...)
return key
}
// Action def
type Action struct {
coinsAccount *account.DB
db dbm.KV
txhash []byte
fromaddr string
blocktime int64
height int64
execaddr string
}
// NewRetrieveAcction gen instance
func NewRetrieveAcction(r *Retrieve, tx *types.Transaction) *Action {
hash := tx.Hash()
fromaddr := tx.From()
return &Action{r.GetCoinsAccount(), r.GetStateDB(), hash, fromaddr,
r.GetBlockTime(), r.GetHeight(), dapp.ExecAddress(string(tx.Execer))}
}
// RetrieveBackup Action
func (action *Action) RetrieveBackup(backupRet *rt.BackupRetrieve) (*types.Receipt, error) {
var logs []*types.ReceiptLog
var kv []*types.KeyValue
var receipt *types.Receipt
var r *DB
var newRetrieve = false
if types.IsDappFork(action.height, rt.RetrieveX, "ForkRetrive") {
if err := address.CheckAddress(backupRet.BackupAddress); err != nil {
rlog.Debug("retrieve checkaddress")
return nil, err
}
if err := address.CheckAddress(backupRet.DefaultAddress); err != nil {
rlog.Debug("retrieve checkaddress")
return nil, err
}
if action.fromaddr != backupRet.DefaultAddress {
rlog.Debug("RetrieveBackup", "action.fromaddr", action.fromaddr, "backupRet.DefaultAddress", backupRet.DefaultAddress)
return nil, rt.ErrRetrieveDefaultAddress
}
}
//用备份地址检索,如果没有,就建立新的,然后检查并处理关联
retrieve, err := readRetrieve(action.db, backupRet.BackupAddress)
if err != nil && err != types.ErrNotFound {
rlog.Error("RetrieveBackup", "readRetrieve", err)
return nil, err
} else if err == types.ErrNotFound {
newRetrieve = true
rlog.Debug("RetrieveBackup", "newAddress", backupRet.BackupAddress)
}
if newRetrieve {
r = NewDB(backupRet.BackupAddress)
} else {
r = &DB{*retrieve}
}
if index, related := r.CheckRelation(backupRet.DefaultAddress); !related {
if !r.RelateDB(backupRet.DefaultAddress, action.blocktime, backupRet.DelayPeriod) {
rlog.Debug("RetrieveBackup", "index", index)
return nil, rt.ErrRetrieveRelateLimit
}
} else {
rlog.Debug("RetrieveBackup", "repeataddr")
return nil, rt.ErrRetrieveRepeatAddress
}
r.Save(action.db)
kv = append(kv, r.GetKVSet()...)
receipt = &types.Receipt{Ty: types.ExecOk, KV: kv, Logs: logs}
return receipt, nil
}
// RetrievePrepare Action
func (action *Action) RetrievePrepare(preRet *rt.PrepareRetrieve) (*types.Receipt, error) {
var logs []*types.ReceiptLog
var kv []*types.KeyValue
var receipt *types.Receipt
var r *DB
var index int
var related bool
retrieve, err := readRetrieve(action.db, preRet.BackupAddress)
if err != nil {
rlog.Debug("RetrievePrepare", "readRetrieve", err)
return nil, err
}
r = &DB{*retrieve}
if action.fromaddr != r.BackupAddress {
rlog.Debug("RetrievePrepare", "action.fromaddr", action.fromaddr, "r.BackupAddress", r.BackupAddress)
return nil, rt.ErrRetrievePrepareAddress
}
if index, related = r.CheckRelation(preRet.DefaultAddress); !related {
rlog.Debug("RetrievePrepare", "CheckRelation", preRet.DefaultAddress)
return nil, rt.ErrRetrieveRelation
}
if r.RetPara[index].Status != retrieveBackup {
rlog.Debug("RetrievePrepare", "Status", r.RetPara[index].Status)
return nil, rt.ErrRetrieveStatus
}
r.RetPara[index].PrepareTime = action.blocktime
r.RetPara[index].Status = retrievePrepare
r.Save(action.db)
kv = append(kv, r.GetKVSet()...)
receipt = &types.Receipt{Ty: types.ExecOk, KV: kv, Logs: logs}
return receipt, nil
}
// RetrievePerform Action
func (action *Action) RetrievePerform(perfRet *rt.PerformRetrieve) (*types.Receipt, error) {
var logs []*types.ReceiptLog
var kv []*types.KeyValue
var receipt *types.Receipt
var index int
var related bool
var acc *types.Account
retrieve, err := readRetrieve(action.db, perfRet.BackupAddress)
if err != nil {
rlog.Debug("RetrievePerform", "readRetrieve", perfRet.BackupAddress)
return nil, err
}
r := &DB{*retrieve}
if index, related = r.CheckRelation(perfRet.DefaultAddress); !related {
rlog.Debug("RetrievePerform", "CheckRelation", perfRet.DefaultAddress)
return nil, rt.ErrRetrieveRelation
}
if r.BackupAddress != action.fromaddr {
rlog.Debug("RetrievePerform", "BackupAddress", r.BackupAddress, "action.fromaddr", action.fromaddr)
return nil, rt.ErrRetrievePerformAddress
}
if r.RetPara[index].Status != retrievePrepare {
rlog.Debug("RetrievePerform", "Status", r.RetPara[index].Status)
return nil, rt.ErrRetrieveStatus
}
if action.blocktime-r.RetPara[index].PrepareTime < r.RetPara[index].DelayPeriod {
rlog.Debug("RetrievePerform", "ErrRetrievePeriodLimit")
return nil, rt.ErrRetrievePeriodLimit
}
acc = action.coinsAccount.LoadExecAccount(r.RetPara[index].DefaultAddress, action.execaddr)
rlog.Debug("RetrievePerform", "acc.Balance", acc.Balance)
if acc.Balance > 0 {
receipt, err = action.coinsAccount.ExecTransfer(r.RetPara[index].DefaultAddress, r.BackupAddress, action.execaddr, acc.Balance)
if err != nil {
rlog.Debug("RetrievePerform", "ExecTransfer", err)
return nil, err
}
} else {
return nil, rt.ErrRetrieveNoBalance
}
//r.RetPara[index].Status = Retrieve_Performed
//remove the relation
r.UnRelateDB(index)
r.Save(action.db)
logs = append(logs, receipt.Logs...)
kv = append(kv, receipt.KV...)
kv = append(kv, r.GetKVSet()...)
receipt = &types.Receipt{Ty: types.ExecOk, KV: kv, Logs: logs}
return receipt, nil
}
// RetrieveCancel Action
func (action *Action) RetrieveCancel(cancel *rt.CancelRetrieve) (*types.Receipt, error) {
var logs []*types.ReceiptLog
var kv []*types.KeyValue
var receipt *types.Receipt
var index int
var related bool
retrieve, err := readRetrieve(action.db, cancel.BackupAddress)
if err != nil {
rlog.Debug("RetrieveCancel", "readRetrieve err", cancel.BackupAddress)
return nil, err
}
r := &DB{*retrieve}
if index, related = r.CheckRelation(cancel.DefaultAddress); !related {
rlog.Debug("RetrieveCancel", "CheckRelation", cancel.DefaultAddress)
return nil, rt.ErrRetrieveRelation
}
if action.fromaddr != r.RetPara[index].DefaultAddress {
rlog.Debug("RetrieveCancel", "action.fromaddr", action.fromaddr, "DefaultAddress", r.RetPara[index].DefaultAddress)
return nil, rt.ErrRetrieveCancelAddress
}
if r.RetPara[index].Status != retrievePrepare {
rlog.Debug("RetrieveCancel", "Status", r.RetPara[index].Status)
return nil, rt.ErrRetrieveStatus
}
//r.RetPara[index].Status = Retrieve_Canceled
//remove the relation
r.UnRelateDB(index)
r.Save(action.db)
kv = append(kv, r.GetKVSet()...)
receipt = &types.Receipt{Ty: types.ExecOk, KV: kv, Logs: logs}
return receipt, nil
}
func readRetrieve(db dbm.KV, address string) (*rt.Retrieve, error) {
data, err := db.Get(Key(address))
if err != nil {
rlog.Debug("readRetrieve", "get", err)
return nil, err
}
var retrieve rt.Retrieve
//decode
err = types.Decode(data, &retrieve)
if err != nil {
rlog.Debug("readRetrieve", "decode", err)
return nil, err
}
return &retrieve, nil
}