protocol/bc/types/map.go

   1 package types
   2
   3 import (
   4         log "github.com/sirupsen/logrus"
   5
   6         "github.com/vapor/consensus"
   7         "github.com/vapor/protocol/bc"
   8         "github.com/vapor/protocol/vm"
   9         "github.com/vapor/protocol/vm/vmutil"
  10 )
  11
  12 // MapTx converts a types TxData object into its entries-based
  13 // representation.
  14 func MapTx(oldTx *TxData) *bc.Tx {
  15         txID, txHeader, entries := mapTx(oldTx)
  16         tx := &bc.Tx{
  17                 TxHeader: txHeader,
  18                 ID:       txID,
  19                 Entries:  entries,
  20                 InputIDs: make([]bc.Hash, len(oldTx.Inputs)),
  21         }
  22
  23         spentOutputIDs := make(map[bc.Hash]bool)
  24         mainchainOutputIDs := make(map[bc.Hash]bool)
  25         for id, e := range entries {
  26                 var ord uint64
  27                 switch e := e.(type) {
  28                 case *bc.CrossChainInput:
  29                         ord = e.Ordinal
  30                         mainchainOutputIDs[*e.MainchainOutputId] = true
  31                         if *e.WitnessDestination.Value.AssetId == *consensus.BTMAssetID {
  32                                 tx.GasInputIDs = append(tx.GasInputIDs, id)
  33                         }
  34
  35                 case *bc.Spend:
  36                         ord = e.Ordinal
  37                         spentOutputIDs[*e.SpentOutputId] = true
  38                         if *e.WitnessDestination.Value.AssetId == *consensus.BTMAssetID {
  39                                 tx.GasInputIDs = append(tx.GasInputIDs, id)
  40                         }
  41
  42                 case *bc.VetoInput:
  43                         ord = e.Ordinal
  44                         spentOutputIDs[*e.SpentOutputId] = true
  45                         if *e.WitnessDestination.Value.AssetId == *consensus.BTMAssetID {
  46                                 tx.GasInputIDs = append(tx.GasInputIDs, id)
  47                         }
  48
  49                 case *bc.Coinbase:
  50                         ord = 0
  51                         tx.GasInputIDs = append(tx.GasInputIDs, id)
  52
  53                 default:
  54                         continue
  55                 }
  56
  57                 if ord >= uint64(len(oldTx.Inputs)) {
  58                         continue
  59                 }
  60                 tx.InputIDs[ord] = id
  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
 115                         out := tx.Outputs[0]
 116                         value := out.AssetAmount()
 117                         muxSources[i] = &bc.ValueSource{
 118                                 Ref:   &coinbaseID,
 119                                 Value: &value,
 120                         }
 121
 122                 case *VetoInput:
 123                         prog := &bc.Program{VmVersion: inp.VMVersion, Code: inp.ControlProgram}
 124                         src := &bc.ValueSource{
 125                                 Ref:      &inp.SourceID,
 126                                 Value:    &inp.AssetAmount,
 127                                 Position: inp.SourcePosition,
 128                         }
 129                         prevout := bc.NewVoteOutput(src, prog, 0, inp.Vote) // ordinal doesn't matter for prevouts, only for result outputs
 130                         prevoutID := addEntry(prevout)
 131                         // create entry for VetoInput
 132                         vetoInput := bc.NewVetoInput(&prevoutID, uint64(i))
 133                         vetoInput.WitnessArguments = inp.Arguments
 134                         vetoVoteID := addEntry(vetoInput)
 135                         // setup mux
 136                         muxSources[i] = &bc.ValueSource{
 137                                 Ref:   &vetoVoteID,
 138                                 Value: &inp.AssetAmount,
 139                         }
 140                         vetoInputs = append(vetoInputs, vetoInput)
 141
 142                 case *CrossChainInput:
 143                         // TODO: fed peg script
 144                         prog := &bc.Program{VmVersion: inp.VMVersion, Code: inp.ControlProgram}
 145                         src := &bc.ValueSource{
 146                                 Ref:      &inp.SourceID,
 147                                 Value:    &inp.AssetAmount,
 148                                 Position: inp.SourcePosition,
 149                         }
 150                         prevout := bc.NewIntraChainOutput(src, prog, 0) // ordinal doesn't matter
 151                         outputID := bc.EntryID(prevout)
 152                         crossIn := bc.NewCrossChainInput(&outputID, &inp.AssetAmount, prog, uint64(i))
 153                         crossIn.WitnessArguments = inp.Arguments
 154                         crossInID := addEntry(crossIn)
 155                         muxSources[i] = &bc.ValueSource{
 156                                 Ref:   &crossInID,
 157                                 Value: &inp.AssetAmount,
 158                         }
 159                         crossIns = append(crossIns, crossIn)
 160                 }
 161         }
 162
 163         mux := bc.NewMux(muxSources, &bc.Program{VmVersion: 1, Code: []byte{byte(vm.OP_TRUE)}})
 164         muxID := addEntry(mux)
 165
 166         // connect the inputs to the mux
 167         for _, spend := range spends {
 168                 spentOutput := entryMap[*spend.SpentOutputId].(*bc.IntraChainOutput)
 169                 spend.SetDestination(&muxID, spentOutput.Source.Value, spend.Ordinal)
 170         }
 171
 172         for _, vetoInput := range vetoInputs {
 173                 voteOutput := entryMap[*vetoInput.SpentOutputId].(*bc.VoteOutput)
 174                 vetoInput.SetDestination(&muxID, voteOutput.Source.Value, vetoInput.Ordinal)
 175         }
 176
 177         for _, crossIn := range crossIns {
 178                 crossIn.SetDestination(&muxID, crossIn.Value, crossIn.Ordinal)
 179         }
 180
 181         if coinbase != nil {
 182                 coinbase.SetDestination(&muxID, mux.Sources[0].Value, 0)
 183         }
 184
 185         // convert types.outputs to the bc.output
 186         var resultIDs []*bc.Hash
 187         for i, out := range tx.Outputs {
 188                 value := out.AssetAmount()
 189                 src := &bc.ValueSource{
 190                         Ref:      &muxID,
 191                         Value:    &value,
 192                         Position: uint64(i),
 193                 }
 194                 var resultID bc.Hash
 195                 switch {
 196                 // must deal with retirement first due to cases' priorities in the switch statement
 197                 case vmutil.IsUnspendable(out.ControlProgram()):
 198                         // retirement
 199                         r := bc.NewRetirement(src, uint64(i))
 200                         resultID = addEntry(r)
 201
 202                 case out.OutputType() == IntraChainOutputType:
 203                         // non-retirement intra-chain tx
 204                         prog := &bc.Program{out.VMVersion(), out.ControlProgram()}
 205                         o := bc.NewIntraChainOutput(src, prog, uint64(i))
 206                         resultID = addEntry(o)
 207
 208                 case out.OutputType() == CrossChainOutputType:
 209                         // non-retirement cross-chain tx
 210                         prog := &bc.Program{out.VMVersion(), out.ControlProgram()}
 211                         o := bc.NewCrossChainOutput(src, prog, uint64(i))
 212                         resultID = addEntry(o)
 213
 214                 case out.OutputType() == VoteOutputType:
 215                         // non-retirement vote tx
 216                         voteOut, _ := out.TypedOutput.(*VoteTxOutput)
 217                         prog := &bc.Program{out.VMVersion(), out.ControlProgram()}
 218                         o := bc.NewVoteOutput(src, prog, uint64(i), voteOut.Vote)
 219                         resultID = addEntry(o)
 220
 221                 default:
 222                         log.Warn("unknown outType")
 223                 }
 224
 225                 dest := &bc.ValueDestination{
 226                         Value:    src.Value,
 227                         Ref:      &resultID,
 228                         Position: 0,
 229                 }
 230                 resultIDs = append(resultIDs, &resultID)
 231                 mux.WitnessDestinations = append(mux.WitnessDestinations, dest)
 232         }
 233
 234         h := bc.NewTxHeader(tx.Version, tx.SerializedSize, tx.TimeRange, resultIDs)
 235         return addEntry(h), h, entryMap
 236 }
 237
 238 func mapBlockHeader(old *BlockHeader) (bc.Hash, *bc.BlockHeader) {
 239         bh := bc.NewBlockHeader(old.Version, old.Height, &old.PreviousBlockHash, old.Timestamp, &old.TransactionsMerkleRoot, &old.TransactionStatusHash, old.Witness)
 240         return bc.EntryID(bh), bh
 241 }
 242
 243 // MapBlock converts a types block to bc block
 244 func MapBlock(old *Block) *bc.Block {
 245         if old == nil {
 246                 return nil
 247         }
 248
 249         b := new(bc.Block)
 250         b.ID, b.BlockHeader = mapBlockHeader(&old.BlockHeader)
 251         for _, oldTx := range old.Transactions {
 252                 b.Transactions = append(b.Transactions, oldTx.Tx)
 253         }
 254         return b
 255 }