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         chainName  string
  28         assetStore *database.AssetStore
  29 }
  30
  31 func NewSidechainKeeper(db *gorm.DB, assetStore *database.AssetStore, cfg *config.Config) *sidechainKeeper {
  32         return &sidechainKeeper{
  33                 cfg:        &cfg.Sidechain,
  34                 db:         db,
  35                 node:       service.NewNode(cfg.Sidechain.Upstream),
  36                 chainName:  cfg.Sidechain.Name,
  37                 assetStore: assetStore,
  38         }
  39 }
  40
  41 func (s *sidechainKeeper) Run() {
  42         ticker := time.NewTicker(time.Duration(s.cfg.SyncSeconds) * time.Second)
  43         for ; true; <-ticker.C {
  44                 for {
  45                         isUpdate, err := s.syncBlock()
  46                         if err != nil {
  47                                 log.WithField("error", err).Errorln("blockKeeper fail on process block")
  48                                 break
  49                         }
  50
  51                         if !isUpdate {
  52                                 break
  53                         }
  54                 }
  55         }
  56 }
  57
  58 func (s *sidechainKeeper) syncBlock() (bool, error) {
  59         chain := &orm.Chain{Name: s.chainName}
  60         if err := s.db.Where(chain).First(chain).Error; err != nil {
  61                 return false, errors.Wrap(err, "query chain")
  62         }
  63
  64         height, err := s.node.GetBlockCount()
  65         if err != nil {
  66                 return false, err
  67         }
  68
  69         if height <= chain.BlockHeight+s.cfg.Confirmations {
  70                 return false, nil
  71         }
  72
  73         nextBlockStr, txStatus, err := s.node.GetBlockByHeight(chain.BlockHeight + 1)
  74         if err != nil {
  75                 return false, err
  76         }
  77
  78         nextBlock := &types.Block{}
  79         if err := nextBlock.UnmarshalText([]byte(nextBlockStr)); err != nil {
  80                 return false, errors.New("Unmarshal nextBlock")
  81         }
  82
  83         if nextBlock.PreviousBlockHash.String() != chain.BlockHash {
  84                 log.WithFields(log.Fields{
  85                         "remote PreviousBlockHash": nextBlock.PreviousBlockHash.String(),
  86                         "db block_hash":            chain.BlockHash,
  87                 }).Fatal("BlockHash mismatch")
  88                 return false, ErrInconsistentDB
  89         }
  90
  91         if err := s.tryAttachBlock(chain, nextBlock, txStatus); err != nil {
  92                 return false, err
  93         }
  94
  95         return true, nil
  96 }
  97
  98 func (s *sidechainKeeper) tryAttachBlock(chain *orm.Chain, block *types.Block, txStatus *bc.TransactionStatus) error {
  99         blockHash := block.Hash()
 100         log.WithFields(log.Fields{"block_height": block.Height, "block_hash": blockHash.String()}).Info("start to attachBlock")
 101         dbTx := s.db.Begin()
 102         if err := s.processBlock(chain, block, txStatus); err != nil {
 103                 dbTx.Rollback()
 104                 return err
 105         }
 106
 107         return dbTx.Commit().Error
 108 }
 109
 110 func (s *sidechainKeeper) processBlock(chain *orm.Chain, block *types.Block, txStatus *bc.TransactionStatus) error {
 111         for i, tx := range block.Transactions {
 112                 if s.isDepositTx(tx) {
 113                         if err := s.processDepositTx(chain, block, uint64(i), tx); err != nil {
 114                                 return err
 115                         }
 116                 }
 117
 118                 if s.isWithdrawalTx(tx) {
 119                         if err := s.processWithdrawalTx(chain, block, txStatus, uint64(i), tx); err != nil {
 120                                 return err
 121                         }
 122                 }
 123         }
 124
 125         return s.processChainInfo(chain, block)
 126 }
 127
 128 func (s *sidechainKeeper) isDepositTx(tx *types.Tx) bool {
 129         for _, input := range tx.Inputs {
 130                 if input.InputType() == types.CrossChainInputType {
 131                         return true
 132                 }
 133         }
 134         return false
 135 }
 136
 137 func (s *sidechainKeeper) isWithdrawalTx(tx *types.Tx) bool {
 138         for _, output := range tx.Outputs {
 139                 if output.OutputType() == types.CrossChainOutputType {
 140                         return true
 141                 }
 142         }
 143         return false
 144 }
 145
 146 func (s *sidechainKeeper) processDepositTx(chain *orm.Chain, block *types.Block, txIndex uint64, tx *types.Tx) error {
 147         blockHash := block.Hash()
 148         stmt := s.db.Model(&orm.CrossTransaction{}).Where("chain_id != ?", chain.ID).
 149                 Where(&orm.CrossTransaction{
 150                         DestTxHash: sql.NullString{tx.ID.String(), true},
 151                         Status:     common.CrossTxPendingStatus,
 152                 }).UpdateColumn(&orm.CrossTransaction{
 153                 DestBlockHeight:    sql.NullInt64{int64(block.Height), true},
 154                 DestBlockTimestamp: sql.NullInt64{int64(block.Timestamp), true},
 155                 DestBlockHash:      sql.NullString{blockHash.String(), true},
 156                 DestTxIndex:        sql.NullInt64{int64(txIndex), true},
 157                 Status:             common.CrossTxCompletedStatus,
 158         })
 159         if stmt.Error != nil {
 160                 return stmt.Error
 161         }
 162
 163         if stmt.RowsAffected != 1 {
 164                 log.Warnf("sidechainKeeper.processDepositTx(%v): rows affected != 1", tx.ID.String())
 165         }
 166         return nil
 167 }
 168
 169 func (s *sidechainKeeper) processWithdrawalTx(chain *orm.Chain, block *types.Block, txStatus *bc.TransactionStatus, txIndex uint64, tx *types.Tx) error {
 170         blockHash := block.Hash()
 171
 172         var muxID bc.Hash
 173         res0ID := tx.ResultIds[0]
 174         switch res := tx.Entries[*res0ID].(type) {
 175         case *bc.CrossChainOutput:
 176                 muxID = *res.Source.Ref
 177         case *bc.IntraChainOutput:
 178                 muxID = *res.Source.Ref
 179         case *bc.VoteOutput:
 180                 muxID = *res.Source.Ref
 181         default:
 182                 return ErrOutputType
 183         }
 184
 185         rawTx, err := tx.MarshalText()
 186         if err != nil {
 187                 return err
 188         }
 189
 190         ormTx := &orm.CrossTransaction{
 191                 ChainID:              chain.ID,
 192                 SourceBlockHeight:    block.Height,
 193                 SourceBlockTimestamp: block.Timestamp,
 194                 SourceBlockHash:      blockHash.String(),
 195                 SourceTxIndex:        txIndex,
 196                 SourceMuxID:          muxID.String(),
 197                 SourceTxHash:         tx.ID.String(),
 198                 SourceRawTransaction: string(rawTx),
 199                 DestBlockHeight:      sql.NullInt64{Valid: false},
 200                 DestBlockTimestamp:   sql.NullInt64{Valid: false},
 201                 DestBlockHash:        sql.NullString{Valid: false},
 202                 DestTxIndex:          sql.NullInt64{Valid: false},
 203                 DestTxHash:           sql.NullString{Valid: false},
 204                 Status:               common.CrossTxPendingStatus,
 205         }
 206         if err := s.db.Create(ormTx).Error; err != nil {
 207                 return errors.Wrap(err, fmt.Sprintf("create sidechain WithdrawalTx %s", tx.ID.String()))
 208         }
 209
 210         statusFail := txStatus.VerifyStatus[txIndex].StatusFail
 211         crossChainOutputs, err := s.getCrossChainReqs(ormTx.ID, tx, statusFail)
 212         if err != nil {
 213                 return err
 214         }
 215
 216         for _, output := range crossChainOutputs {
 217                 if err := s.db.Create(output).Error; err != nil {
 218                         return errors.Wrap(err, fmt.Sprintf("create WithdrawalFromSidechain output: txid(%s), pos(%d)", tx.ID.String(), output.SourcePos))
 219                 }
 220         }
 221
 222         return nil
 223 }
 224
 225 func (s *sidechainKeeper) getCrossChainReqs(crossTransactionID uint64, tx *types.Tx, statusFail bool) ([]*orm.CrossTransactionReq, error) {
 226         reqs := []*orm.CrossTransactionReq{}
 227         for i, rawOutput := range tx.Outputs {
 228                 // check valid withdrawal
 229                 if rawOutput.OutputType() != types.CrossChainOutputType {
 230                         continue
 231                 }
 232
 233                 if statusFail && *rawOutput.OutputCommitment().AssetAmount.AssetId != *consensus.BTMAssetID {
 234                         continue
 235                 }
 236
 237                 asset, err := s.assetStore.GetByAssetID(rawOutput.OutputCommitment().AssetAmount.AssetId.String())
 238                 if err != nil {
 239                         return nil, err
 240                 }
 241
 242                 req := &orm.CrossTransactionReq{
 243                         CrossTransactionID: crossTransactionID,
 244                         SourcePos:          uint64(i),
 245                         AssetID:            asset.ID,
 246                         AssetAmount:        rawOutput.OutputCommitment().AssetAmount.Amount,
 247                         Script:             hex.EncodeToString(rawOutput.ControlProgram()),
 248                 }
 249                 reqs = append(reqs, req)
 250         }
 251         return reqs, nil
 252 }
 253
 254 func (s *sidechainKeeper) processChainInfo(chain *orm.Chain, block *types.Block) error {
 255         blockHash := block.Hash()
 256         chain.BlockHash = blockHash.String()
 257         chain.BlockHeight = block.Height
 258         res := s.db.Model(chain).Where("block_hash = ?", block.PreviousBlockHash.String()).Updates(chain)
 259         if err := res.Error; err != nil {
 260                 return err
 261         }
 262
 263         if res.RowsAffected != 1 {
 264                 return ErrInconsistentDB
 265         }
 266
 267         return nil
 268 }