Merge pull request #201 from Bytom/v0.1

[bytom/vapor.git] / database / leveldb / utxo_view.go

diff --git a/database/leveldb/utxo_view.go b/database/leveldb/utxo_view.go
deleted file mode 100644 (file)
index 2bb9473..0000000
--- a/database/leveldb/utxo_view.go
+++ /dev/null
@@ -1,71 +0,0 @@
-package leveldb
-
-import (
-       dbm "github.com/tendermint/tmlibs/db"
-
-       "github.com/golang/protobuf/proto"
-       "github.com/vapor/database/storage"
-       "github.com/vapor/errors"
-       "github.com/vapor/protocol/bc"
-       "github.com/vapor/protocol/state"
-)
-
-const utxoPreFix = "UT:"
-
-func calcUtxoKey(hash *bc.Hash) []byte {
-       return []byte(utxoPreFix + hash.String())
-}
-
-func getTransactionsUtxo(db dbm.DB, view *state.UtxoViewpoint, txs []*bc.Tx) error {
-       for _, tx := range txs {
-               for _, prevout := range tx.SpentOutputIDs {
-                       if view.HasUtxo(&prevout) {
-                               continue
-                       }
-                       data := db.Get(calcUtxoKey(&prevout))
-                       if data == nil {
-                               continue
-                       }
-                       var utxo storage.UtxoEntry
-                       if err := proto.Unmarshal(data, &utxo); err != nil {
-                               return errors.Wrap(err, "unmarshaling utxo entry")
-                       }
-
-                       view.Entries[prevout] = &utxo
-               }
-       }
-
-       return nil
-}
-
-func getUtxo(db dbm.DB, hash *bc.Hash) (*storage.UtxoEntry, error) {
-       var utxo storage.UtxoEntry
-       data := db.Get(calcUtxoKey(hash))
-       if data == nil {
-               return nil, errors.New("can't find utxo in db")
-       }
-       if err := proto.Unmarshal(data, &utxo); err != nil {
-               return nil, errors.Wrap(err, "unmarshaling utxo entry")
-       }
-       return &utxo, nil
-}
-
-func saveUtxoView(batch dbm.Batch, view *state.UtxoViewpoint) error {
-       for key, entry := range view.Entries {
-               if entry.Spent && !entry.IsCoinBase && !entry.IsCliam {
-                       batch.Delete(calcUtxoKey(&key))
-                       continue
-               }
-
-               b, err := proto.Marshal(entry)
-               if err != nil {
-                       return errors.Wrap(err, "marshaling utxo entry")
-               }
-               batch.Set(calcUtxoKey(&key), b)
-       }
-       return nil
-}
-
-func SaveUtxoView(batch dbm.Batch, view *state.UtxoViewpoint) error {
-       return saveUtxoView(batch, view)
-}