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         for id, e := range entries {
  25                 var ord uint64
  26                 switch e := e.(type) {
  27                 case *bc.Spend:
  28                         ord = e.Ordinal
  29                         spentOutputIDs[*e.SpentOutputId] = true
  30                         if *e.WitnessDestination.Value.AssetId == *consensus.BTMAssetID {
  31                                 tx.GasInputIDs = append(tx.GasInputIDs, id)
  32                         }
  33
  34                 case *bc.Coinbase:
  35                         ord = 0
  36                         tx.GasInputIDs = append(tx.GasInputIDs, id)
  37
  38                 default:
  39                         continue
  40                 }
  41
  42                 if ord >= uint64(len(oldTx.Inputs)) {
  43                         continue
  44                 }
  45                 tx.InputIDs[ord] = id
  46         }
  47
  48         for id := range spentOutputIDs {
  49                 tx.SpentOutputIDs = append(tx.SpentOutputIDs, id)
  50         }
  51         return tx
  52 }
  53
  54 func mapTx(tx *TxData) (headerID bc.Hash, hdr *bc.TxHeader, entryMap map[bc.Hash]bc.Entry) {
  55         entryMap = make(map[bc.Hash]bc.Entry)
  56         addEntry := func(e bc.Entry) bc.Hash {
  57                 id := bc.EntryID(e)
  58                 entryMap[id] = e
  59                 return id
  60         }
  61
  62         var (
  63                 spends   []*bc.Spend
  64                 coinbase *bc.Coinbase
  65         )
  66
  67         muxSources := make([]*bc.ValueSource, len(tx.Inputs))
  68         for i, input := range tx.Inputs {
  69                 switch inp := input.TypedInput.(type) {
  70                 case *SpendInput:
  71                         // create entry for prevout
  72                         prog := &bc.Program{VmVersion: inp.VMVersion, Code: inp.ControlProgram}
  73                         src := &bc.ValueSource{
  74                                 Ref:      &inp.SourceID,
  75                                 Value:    &inp.AssetAmount,
  76                                 Position: inp.SourcePosition,
  77                         }
  78                         prevout := bc.NewIntraChainOutput(src, prog, 0) // ordinal doesn't matter for prevouts, only for result outputs
  79                         prevoutID := addEntry(prevout)
  80                         // create entry for spend
  81                         spend := bc.NewSpend(&prevoutID, uint64(i))
  82                         spend.WitnessArguments = inp.Arguments
  83                         spendID := addEntry(spend)
  84                         // setup mux
  85                         muxSources[i] = &bc.ValueSource{
  86                                 Ref:   &spendID,
  87                                 Value: &inp.AssetAmount,
  88                         }
  89                         spends = append(spends, spend)
  90
  91                 case *CoinbaseInput:
  92                         coinbase = bc.NewCoinbase(inp.Arbitrary)
  93                         coinbaseID := addEntry(coinbase)
  94
  95                         out := tx.Outputs[0]
  96                         value := out.AssetAmount()
  97                         muxSources[i] = &bc.ValueSource{
  98                                 Ref:   &coinbaseID,
  99                                 Value: &value,
 100                         }
 101
 102                 case *UnvoteInput:
 103                         // create entry for prevout
 104                         prog := &bc.Program{VmVersion: inp.VMVersion, Code: inp.ControlProgram}
 105                         src := &bc.ValueSource{
 106                                 Ref:      &inp.SourceID,
 107                                 Value:    &inp.AssetAmount,
 108                                 Position: inp.SourcePosition,
 109                         }
 110                         prevout := bc.NewVoteOutput(src, prog, 0, inp.Vote) // ordinal doesn't matter for prevouts, only for result outputs
 111                         prevoutID := addEntry(prevout)
 112                         // create entry for spend
 113                         spend := bc.NewSpend(&prevoutID, uint64(i))
 114                         spend.WitnessArguments = inp.Arguments
 115                         spendID := addEntry(spend)
 116                         // setup mux
 117                         muxSources[i] = &bc.ValueSource{
 118                                 Ref:   &spendID,
 119                                 Value: &inp.AssetAmount,
 120                         }
 121                         spends = append(spends, spend)
 122
 123                 }
 124         }
 125
 126         mux := bc.NewMux(muxSources, &bc.Program{VmVersion: 1, Code: []byte{byte(vm.OP_TRUE)}})
 127         muxID := addEntry(mux)
 128
 129         // connect the inputs to the mux
 130         for _, spend := range spends {
 131                 spentOutput := entryMap[*spend.SpentOutputId].(*bc.IntraChainOutput)
 132                 spend.SetDestination(&muxID, spentOutput.Source.Value, spend.Ordinal)
 133         }
 134
 135         if coinbase != nil {
 136                 coinbase.SetDestination(&muxID, mux.Sources[0].Value, 0)
 137         }
 138
 139         // convert types.outputs to the bc.output
 140         var resultIDs []*bc.Hash
 141         for i, out := range tx.Outputs {
 142                 value := out.AssetAmount()
 143                 src := &bc.ValueSource{
 144                         Ref:      &muxID,
 145                         Value:    &value,
 146                         Position: uint64(i),
 147                 }
 148                 var resultID bc.Hash
 149                 switch {
 150                 // must deal with retirement first due to cases' priorities in the switch statement
 151                 case vmutil.IsUnspendable(out.ControlProgram()):
 152                         // retirement
 153                         r := bc.NewRetirement(src, uint64(i))
 154                         resultID = addEntry(r)
 155
 156                 case out.OutputType() == IntraChainOutputType:
 157                         // non-retirement intra-chain tx
 158                         prog := &bc.Program{out.VMVersion(), out.ControlProgram()}
 159                         o := bc.NewIntraChainOutput(src, prog, uint64(i))
 160                         resultID = addEntry(o)
 161
 162                 case out.OutputType() == CrossChainOutputType:
 163                         // non-retirement cross-chain tx
 164                         prog := &bc.Program{out.VMVersion(), out.ControlProgram()}
 165                         o := bc.NewCrossChainOutput(src, prog, uint64(i))
 166                         resultID = addEntry(o)
 167
 168                 case out.OutputType() == VoteOutputType:
 169                         // non-retirement vote tx
 170                         voteOut, _ := out.TypedOutput.(*VoteTxOutput)
 171                         prog := &bc.Program{out.VMVersion(), out.ControlProgram()}
 172                         o := bc.NewVoteOutput(src, prog, uint64(i), voteOut.Vote)
 173                         resultID = addEntry(o)
 174
 175                 default:
 176                         log.Warn("unknown outType")
 177                 }
 178
 179                 dest := &bc.ValueDestination{
 180                         Value:    src.Value,
 181                         Ref:      &resultID,
 182                         Position: 0,
 183                 }
 184                 resultIDs = append(resultIDs, &resultID)
 185                 mux.WitnessDestinations = append(mux.WitnessDestinations, dest)
 186         }
 187
 188         h := bc.NewTxHeader(tx.Version, tx.SerializedSize, tx.TimeRange, resultIDs)
 189         return addEntry(h), h, entryMap
 190 }
 191
 192 func mapBlockHeader(old *BlockHeader) (bc.Hash, *bc.BlockHeader) {
 193         bh := bc.NewBlockHeader(old.Version, old.Height, &old.PreviousBlockHash, old.Timestamp, &old.TransactionsMerkleRoot, &old.TransactionStatusHash, old.Witness)
 194         return bc.EntryID(bh), bh
 195 }
 196
 197 // MapBlock converts a types block to bc block
 198 func MapBlock(old *Block) *bc.Block {
 199         if old == nil {
 200                 return nil
 201         }
 202
 203         b := new(bc.Block)
 204         b.ID, b.BlockHeader = mapBlockHeader(&old.BlockHeader)
 205         for _, oldTx := range old.Transactions {
 206                 b.Transactions = append(b.Transactions, oldTx.Tx)
 207         }
 208         return b
 209 }