federation/synchron/sidechain_keeper.go

   1 package synchron
   2
   3 import (
   4         "database/sql"
   5         "encoding/hex"
   6         "fmt"
   7         "time"
   8
   9         "github.com/jinzhu/gorm"
  10         log "github.com/sirupsen/logrus"
  11
  12         "github.com/vapor/consensus"
  13         "github.com/vapor/errors"
  14         "github.com/vapor/federation/common"
  15         "github.com/vapor/federation/config"
  16         "github.com/vapor/federation/database"
  17         "github.com/vapor/federation/database/orm"
  18         "github.com/vapor/federation/service"
  19         "github.com/vapor/protocol/bc"
  20         "github.com/vapor/protocol/bc/types"
  21 )
  22
  23 type sidechainKeeper struct {
  24         cfg        *config.Chain
  25         db         *gorm.DB
  26         node       *service.Node
  27         assetStore *database.AssetStore
  28         chainID    uint64
  29 }
  30
  31 func NewSidechainKeeper(db *gorm.DB, assetStore *database.AssetStore, cfg *config.Config) *sidechainKeeper {
  32         chain := &orm.Chain{Name: common.VaporChainName}
  33         if err := db.Where(chain).First(chain).Error; err != nil {
  34                 log.WithField("err", err).Fatal("fail on get chain info")
  35         }
  36
  37         return &sidechainKeeper{
  38                 cfg:        &cfg.Sidechain,
  39                 db:         db,
  40                 node:       service.NewNode(cfg.Sidechain.Upstream),
  41                 assetStore: assetStore,
  42         }
  43 }
  44
  45 func (s *sidechainKeeper) Run() {
  46         ticker := time.NewTicker(time.Duration(s.cfg.SyncSeconds) * time.Second)
  47         for ; true; <-ticker.C {
  48                 for {
  49                         isUpdate, err := s.syncBlock()
  50                         if err != nil {
  51                                 log.WithField("error", err).Errorln("blockKeeper fail on process block")
  52                                 break
  53                         }
  54
  55                         if !isUpdate {
  56                                 break
  57                         }
  58                 }
  59         }
  60 }
  61
  62 func (s *sidechainKeeper) createCrossChainReqs(db *gorm.DB, crossTransactionID uint64, tx *types.Tx, statusFail bool) error {
  63         fromAddress := common.ProgToAddress(tx.Inputs[0].ControlProgram(), &consensus.MainNetParams)
  64         for i, rawOutput := range tx.Outputs {
  65                 if rawOutput.OutputType() != types.CrossChainOutputType {
  66                         continue
  67                 }
  68
  69                 if statusFail && *rawOutput.OutputCommitment().AssetAmount.AssetId != *consensus.BTMAssetID {
  70                         continue
  71                 }
  72
  73                 asset, err := s.assetStore.GetByAssetID(rawOutput.OutputCommitment().AssetAmount.AssetId.String())
  74                 if err != nil {
  75                         return err
  76                 }
  77
  78                 prog := rawOutput.ControlProgram()
  79                 req := &orm.CrossTransactionReq{
  80                         CrossTransactionID: crossTransactionID,
  81                         SourcePos:          uint64(i),
  82                         AssetID:            asset.ID,
  83                         AssetAmount:        rawOutput.OutputCommitment().AssetAmount.Amount,
  84                         Script:             hex.EncodeToString(prog),
  85                         FromAddress:        fromAddress,
  86                         ToAddress:          common.ProgToAddress(prog, &consensus.BytomMainNetParams),
  87                 }
  88
  89                 if err := db.Create(req).Error; err != nil {
  90                         return err
  91                 }
  92         }
  93         return nil
  94 }
  95
  96 func (s *sidechainKeeper) isDepositTx(tx *types.Tx) bool {
  97         for _, input := range tx.Inputs {
  98                 if input.InputType() == types.CrossChainInputType {
  99                         return true
 100                 }
 101         }
 102         return false
 103 }
 104
 105 func (s *sidechainKeeper) isWithdrawalTx(tx *types.Tx) bool {
 106         for _, output := range tx.Outputs {
 107                 if output.OutputType() == types.CrossChainOutputType {
 108                         return true
 109                 }
 110         }
 111         return false
 112 }
 113
 114 func (s *sidechainKeeper) processBlock(db *gorm.DB, block *types.Block, txStatus *bc.TransactionStatus) error {
 115         for i, tx := range block.Transactions {
 116                 if s.isDepositTx(tx) {
 117                         if err := s.processDepositTx(db, block, i); err != nil {
 118                                 return err
 119                         }
 120                 }
 121
 122                 if s.isWithdrawalTx(tx) {
 123                         if err := s.processWithdrawalTx(db, block, txStatus, i); err != nil {
 124                                 return err
 125                         }
 126                 }
 127         }
 128         return nil
 129 }
 130
 131 func (s *sidechainKeeper) processChainInfo(db *gorm.DB, block *types.Block) error {
 132         blockHash := block.Hash()
 133         res := db.Model(&orm.Chain{}).Where("block_hash = ?", block.PreviousBlockHash.String()).Updates(&orm.Chain{
 134                 BlockHash:   blockHash.String(),
 135                 BlockHeight: block.Height,
 136         })
 137         if err := res.Error; err != nil {
 138                 return err
 139         }
 140
 141         if res.RowsAffected != 1 {
 142                 return ErrInconsistentDB
 143         }
 144
 145         return nil
 146 }
 147
 148 func (s *sidechainKeeper) processDepositTx(db *gorm.DB, block *types.Block, txIndex int) error {
 149         tx := block.Transactions[txIndex]
 150         sourceTxHash, err := s.locateMainChainTx(tx.Inputs[0])
 151         if err != nil {
 152                 return err
 153         }
 154
 155         blockHash := block.Hash()
 156         stmt := db.Model(&orm.CrossTransaction{}).Where(&orm.CrossTransaction{
 157                 SourceTxHash: sourceTxHash,
 158                 Status:       common.CrossTxPendingStatus,
 159         }).UpdateColumn(&orm.CrossTransaction{
 160                 DestBlockHeight:    sql.NullInt64{int64(block.Height), true},
 161                 DestBlockTimestamp: sql.NullInt64{int64(block.Timestamp), true},
 162                 DestBlockHash:      sql.NullString{blockHash.String(), true},
 163                 DestTxIndex:        sql.NullInt64{int64(txIndex), true},
 164                 DestTxHash:         sql.NullString{tx.ID.String(), true},
 165                 Status:             common.CrossTxCompletedStatus,
 166         })
 167         if stmt.Error != nil {
 168                 return stmt.Error
 169         }
 170
 171         if stmt.RowsAffected != 1 {
 172                 return errors.Wrap(ErrInconsistentDB, "fail on find deposit data on database")
 173         }
 174         return nil
 175 }
 176
 177 func (s *sidechainKeeper) processWithdrawalTx(db *gorm.DB, block *types.Block, txStatus *bc.TransactionStatus, txIndex int) error {
 178         tx := block.Transactions[txIndex]
 179         var muxID bc.Hash
 180         switch res := tx.Entries[*tx.ResultIds[0]].(type) {
 181         case *bc.CrossChainOutput:
 182                 muxID = *res.Source.Ref
 183         case *bc.IntraChainOutput:
 184                 muxID = *res.Source.Ref
 185         case *bc.VoteOutput:
 186                 muxID = *res.Source.Ref
 187         case *bc.Retirement:
 188                 muxID = *res.Source.Ref
 189         default:
 190                 return ErrOutputType
 191         }
 192
 193         rawTx, err := tx.MarshalText()
 194         if err != nil {
 195                 return err
 196         }
 197
 198         blockHash := block.Hash()
 199         ormTx := &orm.CrossTransaction{
 200                 ChainID:              s.chainID,
 201                 SourceBlockHeight:    block.Height,
 202                 SourceBlockTimestamp: block.Timestamp,
 203                 SourceBlockHash:      blockHash.String(),
 204                 SourceTxIndex:        uint64(txIndex),
 205                 SourceMuxID:          muxID.String(),
 206                 SourceTxHash:         tx.ID.String(),
 207                 SourceRawTransaction: string(rawTx),
 208                 DestBlockHeight:      sql.NullInt64{Valid: false},
 209                 DestBlockTimestamp:   sql.NullInt64{Valid: false},
 210                 DestBlockHash:        sql.NullString{Valid: false},
 211                 DestTxIndex:          sql.NullInt64{Valid: false},
 212                 DestTxHash:           sql.NullString{Valid: false},
 213                 Status:               common.CrossTxPendingStatus,
 214         }
 215         if err := db.Create(ormTx).Error; err != nil {
 216                 return errors.Wrap(err, fmt.Sprintf("create sidechain WithdrawalTx %s", tx.ID.String()))
 217         }
 218
 219         return s.createCrossChainReqs(db, ormTx.ID, tx, txStatus.VerifyStatus[txIndex].StatusFail)
 220 }
 221
 222 func (s *sidechainKeeper) locateMainChainTx(input *types.TxInput) (string, error) {
 223         if input.InputType() != types.CrossChainInputType {
 224                 return "", errors.New("found weird crossChain tx")
 225         }
 226
 227         crossIn := input.TypedInput.(*types.CrossChainInput)
 228         crossTx := &orm.CrossTransaction{SourceMuxID: crossIn.SpendCommitment.SourceID.String()}
 229         if err := s.db.Where(crossTx).First(crossTx).Error; err != nil {
 230                 return "", errors.Wrap(err, "fail on find CrossTransaction")
 231         }
 232         return crossTx.SourceTxHash, nil
 233 }
 234
 235 func (s *sidechainKeeper) syncBlock() (bool, error) {
 236         chain := &orm.Chain{ID: s.chainID}
 237         if err := s.db.First(chain).Error; err != nil {
 238                 return false, errors.Wrap(err, "query chain")
 239         }
 240
 241         height, err := s.node.GetBlockCount()
 242         if err != nil {
 243                 return false, err
 244         }
 245
 246         if height <= chain.BlockHeight+s.cfg.Confirmations {
 247                 return false, nil
 248         }
 249
 250         nextBlockStr, txStatus, err := s.node.GetBlockByHeight(chain.BlockHeight + 1)
 251         if err != nil {
 252                 return false, err
 253         }
 254
 255         nextBlock := &types.Block{}
 256         if err := nextBlock.UnmarshalText([]byte(nextBlockStr)); err != nil {
 257                 return false, errors.New("Unmarshal nextBlock")
 258         }
 259
 260         if nextBlock.PreviousBlockHash.String() != chain.BlockHash {
 261                 log.WithFields(log.Fields{
 262                         "remote previous_block_Hash": nextBlock.PreviousBlockHash.String(),
 263                         "db block_hash":              chain.BlockHash,
 264                 }).Fatal("fail on block hash mismatch")
 265         }
 266
 267         if err := s.tryAttachBlock(nextBlock, txStatus); err != nil {
 268                 return false, err
 269         }
 270
 271         return true, nil
 272 }
 273
 274 func (s *sidechainKeeper) tryAttachBlock(block *types.Block, txStatus *bc.TransactionStatus) error {
 275         blockHash := block.Hash()
 276         log.WithFields(log.Fields{"block_height": block.Height, "block_hash": blockHash.String()}).Info("start to attachBlock")
 277
 278         dbTx := s.db.Begin()
 279         if err := s.processBlock(dbTx, block, txStatus); err != nil {
 280                 dbTx.Rollback()
 281                 return err
 282         }
 283
 284         if err := s.processChainInfo(dbTx, block); err != nil {
 285                 dbTx.Rollback()
 286                 return err
 287         }
 288         return dbTx.Commit().Error
 289 }