protocol/bc/types/map.go

   1 package types
   2
   3 import (
   4         log "github.com/sirupsen/logrus"
   5         "golang.org/x/crypto/sha3"
   6
   7         "github.com/bytom/vapor/consensus"
   8         "github.com/bytom/vapor/protocol/bc"
   9         "github.com/bytom/vapor/protocol/vm"
  10         "github.com/bytom/vapor/protocol/vm/vmutil"
  11 )
  12
  13 // MapTx converts a types TxData object into its entries-based
  14 // representation.
  15 func MapTx(oldTx *TxData) *bc.Tx {
  16         txID, txHeader, entries := mapTx(oldTx)
  17         tx := &bc.Tx{
  18                 TxHeader: txHeader,
  19                 ID:       txID,
  20                 Entries:  entries,
  21                 InputIDs: make([]bc.Hash, len(oldTx.Inputs)),
  22         }
  23
  24         spentOutputIDs := make(map[bc.Hash]bool)
  25         mainchainOutputIDs := make(map[bc.Hash]bool)
  26         for id, e := range entries {
  27                 var ord uint64
  28                 switch e := e.(type) {
  29                 case *bc.CrossChainInput:
  30                         ord = e.Ordinal
  31                         mainchainOutputIDs[*e.MainchainOutputId] = true
  32                         if *e.WitnessDestination.Value.AssetId == *consensus.BTMAssetID {
  33                                 tx.GasInputIDs = append(tx.GasInputIDs, id)
  34                         }
  35
  36                 case *bc.Spend:
  37                         ord = e.Ordinal
  38                         spentOutputIDs[*e.SpentOutputId] = true
  39                         if *e.WitnessDestination.Value.AssetId == *consensus.BTMAssetID {
  40                                 tx.GasInputIDs = append(tx.GasInputIDs, id)
  41                         }
  42
  43                 case *bc.VetoInput:
  44                         ord = e.Ordinal
  45                         spentOutputIDs[*e.SpentOutputId] = true
  46                         if *e.WitnessDestination.Value.AssetId == *consensus.BTMAssetID {
  47                                 tx.GasInputIDs = append(tx.GasInputIDs, id)
  48                         }
  49
  50                 case *bc.Coinbase:
  51                         ord = 0
  52                         tx.GasInputIDs = append(tx.GasInputIDs, id)
  53
  54                 default:
  55                         continue
  56                 }
  57
  58                 if ord < uint64(len(oldTx.Inputs)) {
  59                         tx.InputIDs[ord] = id
  60                 }
  61         }
  62
  63         for id := range spentOutputIDs {
  64                 tx.SpentOutputIDs = append(tx.SpentOutputIDs, id)
  65         }
  66         for id := range mainchainOutputIDs {
  67                 tx.MainchainOutputIDs = append(tx.MainchainOutputIDs, id)
  68         }
  69         return tx
  70 }
  71
  72 func mapTx(tx *TxData) (headerID bc.Hash, hdr *bc.TxHeader, entryMap map[bc.Hash]bc.Entry) {
  73         entryMap = make(map[bc.Hash]bc.Entry)
  74         addEntry := func(e bc.Entry) bc.Hash {
  75                 id := bc.EntryID(e)
  76                 entryMap[id] = e
  77                 return id
  78         }
  79
  80         var (
  81                 spends     []*bc.Spend
  82                 vetoInputs []*bc.VetoInput
  83                 crossIns   []*bc.CrossChainInput
  84                 coinbase   *bc.Coinbase
  85         )
  86
  87         muxSources := make([]*bc.ValueSource, len(tx.Inputs))
  88         for i, input := range tx.Inputs {
  89                 switch inp := input.TypedInput.(type) {
  90                 case *SpendInput:
  91                         // create entry for prevout
  92                         prog := &bc.Program{VmVersion: inp.VMVersion, Code: inp.ControlProgram}
  93                         src := &bc.ValueSource{
  94                                 Ref:      &inp.SourceID,
  95                                 Value:    &inp.AssetAmount,
  96                                 Position: inp.SourcePosition,
  97                         }
  98                         prevout := bc.NewIntraChainOutput(src, prog, 0) // ordinal doesn't matter for prevouts, only for result outputs
  99                         prevoutID := addEntry(prevout)
 100                         // create entry for spend
 101                         spend := bc.NewSpend(&prevoutID, uint64(i))
 102                         spend.WitnessArguments = inp.Arguments
 103                         spendID := addEntry(spend)
 104                         // setup mux
 105                         muxSources[i] = &bc.ValueSource{
 106                                 Ref:   &spendID,
 107                                 Value: &inp.AssetAmount,
 108                         }
 109                         spends = append(spends, spend)
 110
 111                 case *CoinbaseInput:
 112                         coinbase = bc.NewCoinbase(inp.Arbitrary)
 113                         coinbaseID := addEntry(coinbase)
 114                         totalAmount := uint64(0)
 115                         for _, out := range tx.Outputs {
 116                                 totalAmount += out.AssetAmount().Amount
 117                         }
 118                         muxSources[i] = &bc.ValueSource{
 119                                 Ref: &coinbaseID,
 120                                 Value: &bc.AssetAmount{
 121                                         AssetId: consensus.BTMAssetID,
 122                                         Amount:  totalAmount,
 123                                 },
 124                         }
 125
 126                 case *VetoInput:
 127                         prog := &bc.Program{VmVersion: inp.VMVersion, Code: inp.ControlProgram}
 128                         src := &bc.ValueSource{
 129                                 Ref:      &inp.SourceID,
 130                                 Value:    &inp.AssetAmount,
 131                                 Position: inp.SourcePosition,
 132                         }
 133                         prevout := bc.NewVoteOutput(src, prog, 0, inp.Vote) // ordinal doesn't matter for prevouts, only for result outputs
 134                         prevoutID := addEntry(prevout)
 135                         // create entry for VetoInput
 136                         vetoInput := bc.NewVetoInput(&prevoutID, uint64(i))
 137                         vetoInput.WitnessArguments = inp.Arguments
 138                         vetoVoteID := addEntry(vetoInput)
 139                         // setup mux
 140                         muxSources[i] = &bc.ValueSource{
 141                                 Ref:   &vetoVoteID,
 142                                 Value: &inp.AssetAmount,
 143                         }
 144                         vetoInputs = append(vetoInputs, vetoInput)
 145
 146                 case *CrossChainInput:
 147                         prog := &bc.Program{VmVersion: inp.VMVersion, Code: inp.ControlProgram}
 148                         src := &bc.ValueSource{
 149                                 Ref:      &inp.SourceID,
 150                                 Value:    &inp.AssetAmount,
 151                                 Position: inp.SourcePosition,
 152                         }
 153
 154                         prevout := bc.NewIntraChainOutput(src, prog, 0) // ordinal doesn't matter
 155                         mainchainOutputID := addEntry(prevout)
 156
 157                         assetDefHash := bc.NewHash(sha3.Sum256(inp.AssetDefinition))
 158                         assetDef := &bc.AssetDefinition{
 159                                 Data: &assetDefHash,
 160                                 IssuanceProgram: &bc.Program{
 161                                         VmVersion: inp.IssuanceVMVersion,
 162                                         Code:      inp.IssuanceProgram,
 163                                 },
 164                         }
 165
 166                         crossIn := bc.NewCrossChainInput(&mainchainOutputID, prog, uint64(i), assetDef, inp.AssetDefinition)
 167                         crossIn.WitnessArguments = inp.Arguments
 168                         crossInID := addEntry(crossIn)
 169                         muxSources[i] = &bc.ValueSource{
 170                                 Ref:   &crossInID,
 171                                 Value: &inp.AssetAmount,
 172                         }
 173                         crossIns = append(crossIns, crossIn)
 174                 }
 175         }
 176
 177         mux := bc.NewMux(muxSources, &bc.Program{VmVersion: 1, Code: []byte{byte(vm.OP_TRUE)}})
 178         muxID := addEntry(mux)
 179
 180         // connect the inputs to the mux
 181         for _, spend := range spends {
 182                 spentOutput := entryMap[*spend.SpentOutputId].(*bc.IntraChainOutput)
 183                 spend.SetDestination(&muxID, spentOutput.Source.Value, spend.Ordinal)
 184         }
 185
 186         for _, vetoInput := range vetoInputs {
 187                 voteOutput := entryMap[*vetoInput.SpentOutputId].(*bc.VoteOutput)
 188                 vetoInput.SetDestination(&muxID, voteOutput.Source.Value, vetoInput.Ordinal)
 189         }
 190
 191         for _, crossIn := range crossIns {
 192                 mainchainOutput := entryMap[*crossIn.MainchainOutputId].(*bc.IntraChainOutput)
 193                 crossIn.SetDestination(&muxID, mainchainOutput.Source.Value, crossIn.Ordinal)
 194         }
 195
 196         if coinbase != nil {
 197                 coinbase.SetDestination(&muxID, mux.Sources[0].Value, 0)
 198         }
 199
 200         // convert types.outputs to the bc.output
 201         var resultIDs []*bc.Hash
 202         for i, out := range tx.Outputs {
 203                 value := out.AssetAmount()
 204                 src := &bc.ValueSource{
 205                         Ref:      &muxID,
 206                         Value:    &value,
 207                         Position: uint64(i),
 208                 }
 209                 var resultID bc.Hash
 210                 switch {
 211                 // must deal with retirement first due to cases' priorities in the switch statement
 212                 case vmutil.IsUnspendable(out.ControlProgram()):
 213                         // retirement
 214                         r := bc.NewRetirement(src, uint64(i))
 215                         resultID = addEntry(r)
 216
 217                 case out.OutputType() == IntraChainOutputType:
 218                         // non-retirement intra-chain tx
 219                         prog := &bc.Program{out.VMVersion(), out.ControlProgram()}
 220                         o := bc.NewIntraChainOutput(src, prog, uint64(i))
 221                         resultID = addEntry(o)
 222
 223                 case out.OutputType() == CrossChainOutputType:
 224                         // non-retirement cross-chain tx
 225                         prog := &bc.Program{out.VMVersion(), out.ControlProgram()}
 226                         o := bc.NewCrossChainOutput(src, prog, uint64(i))
 227                         resultID = addEntry(o)
 228
 229                 case out.OutputType() == VoteOutputType:
 230                         // non-retirement vote tx
 231                         voteOut, _ := out.TypedOutput.(*VoteOutput)
 232                         prog := &bc.Program{out.VMVersion(), out.ControlProgram()}
 233                         o := bc.NewVoteOutput(src, prog, uint64(i), voteOut.Vote)
 234                         resultID = addEntry(o)
 235
 236                 default:
 237                         log.Warn("unknown outType")
 238                 }
 239
 240                 dest := &bc.ValueDestination{
 241                         Value:    src.Value,
 242                         Ref:      &resultID,
 243                         Position: 0,
 244                 }
 245                 resultIDs = append(resultIDs, &resultID)
 246                 mux.WitnessDestinations = append(mux.WitnessDestinations, dest)
 247         }
 248
 249         h := bc.NewTxHeader(tx.Version, tx.SerializedSize, tx.TimeRange, resultIDs)
 250         return addEntry(h), h, entryMap
 251 }
 252
 253 func mapBlockHeader(old *BlockHeader) (bc.Hash, *bc.BlockHeader) {
 254         bh := bc.NewBlockHeader(old.Version, old.Height, &old.PreviousBlockHash, old.Timestamp, &old.TransactionsMerkleRoot, &old.TransactionStatusHash, old.Witness)
 255         return bc.EntryID(bh), bh
 256 }
 257
 258 // MapBlock converts a types block to bc block
 259 func MapBlock(old *Block) *bc.Block {
 260         if old == nil {
 261                 return nil
 262         }
 263
 264         b := new(bc.Block)
 265         b.ID, b.BlockHeader = mapBlockHeader(&old.BlockHeader)
 266         for _, oldTx := range old.Transactions {
 267                 b.Transactions = append(b.Transactions, oldTx.Tx)
 268         }
 269         return b
 270 }