core: drop old STContractID data

We have it in the ContractManagement now.

pkg/core/blockchain.go

@@ -45,7 +45,7 @@ import (
 
 // Tuning parameters.
 const (
-	version = "0.2.6"
+	version = "0.2.7"
 
 	defaultInitialGAS                      = 52000000_00000000
 	defaultGCPeriod                        = 10000
@@ -717,21 +717,9 @@ func (bc *Blockchain) resetStateInternal(height uint32, stage stateChangeStage)
 		p = time.Now()
 		fallthrough
 	case staleBlocksRemoved:
-		// Completely remove contract IDs to update them later.
+		bc.log.Info("trying to reset contract storage items")
-		bc.log.Info("trying to reset contract storage items and IDs")
 		pStorageStart := p
-		cache.Store.Seek(storage.SeekRange{Prefix: []byte{byte(storage.STContractID)}}, func(k, _ []byte) bool {
-			cache.Store.Delete(k)
-			return true
-		})
-		keys, err = cache.Persist()
-		if err != nil {
-			return fmt.Errorf("failed to persist removed contract IDs: %w", err)
-		}
-		bc.log.Info("removed contract IDs are persisted", zap.Duration("took", time.Since(p)), zap.Int("keys", keys))
-		p = time.Now()
 
-		// Reset contracts storage and store new contract IDs.
 		var mode = mpt.ModeAll
 		if bc.config.RemoveUntraceableBlocks {
 			mode |= mpt.ModeGCFlag
@@ -739,19 +727,12 @@ func (bc *Blockchain) resetStateInternal(height uint32, stage stateChangeStage)
 		trieStore := mpt.NewTrieStore(sr.Root, mode, cache.Store)
 		oldStoragePrefix := v.StoragePrefix
 		newStoragePrefix := statesync.TemporaryPrefix(oldStoragePrefix)
-		mgmtCSPrefixLen := 1 + 4 + 1 // STStorage + Management ID + contract state prefix
-		mgmtContractPrefix := make([]byte, mgmtCSPrefixLen-1)
-		id := int32(native.ManagementContractID)
-		binary.BigEndian.PutUint32(mgmtContractPrefix, uint32(id))
-		mgmtContractPrefix[4] = native.PrefixContract
-		cs := new(state.Contract)
 
 		const persistBatchSize = 200000
 		var (
 			seekErr        error
 			cnt            int
 			storageItmsCnt int
-			contractIDsCnt int
 			batchCnt       int
 		)
 		trieStore.Seek(storage.SeekRange{Prefix: []byte{byte(oldStoragePrefix)}}, func(k, v []byte) bool {
@@ -775,22 +756,6 @@ func (bc *Blockchain) resetStateInternal(height uint32, stage stateChangeStage)
 			cnt++
 			storageItmsCnt++
 
-			// @fixme: remove this part after #2702.
-			if bytes.HasPrefix(k[1:], mgmtContractPrefix) {
-				var hash util.Uint160
-				copy(hash[:], k[mgmtCSPrefixLen:])
-				err = stackitem.DeserializeConvertible(v, cs)
-				if err != nil {
-					bc.log.Warn("failed to deserialize contract; ID for this contract won't be stored in the DB",
-						zap.String("hash", hash.StringLE()),
-						zap.Error(err))
-				} else {
-					cache.PutContractID(cs.ID, hash)
-					cnt++
-					contractIDsCnt++
-				}
-			}
-
 			return true
 		})
 		if seekErr != nil {
@@ -806,8 +771,7 @@ func (bc *Blockchain) resetStateInternal(height uint32, stage stateChangeStage)
 		batchCnt++
 		bc.log.Info("last batch of contract storage items and IDs is persisted", zap.Int("batch", batchCnt), zap.Duration("took", time.Since(p)), zap.Int("keys", keys))
 		bc.log.Info("contract storage items and IDs are reset", zap.Duration("took", time.Since(pStorageStart)),
-			zap.Int("keys", storageItmsCnt),
+			zap.Int("keys", storageItmsCnt))
-			zap.Int("ids", contractIDsCnt))
 		p = time.Now()
 		fallthrough
 	case newStorageItemsAdded:
@@ -2121,7 +2085,7 @@ func (bc *Blockchain) GetContractState(hash util.Uint160) *state.Contract {
 
 // GetContractScriptHash returns contract script hash by its ID.
 func (bc *Blockchain) GetContractScriptHash(id int32) (util.Uint160, error) {
-	return bc.dao.GetContractScriptHash(id)
+	return native.GetContractScriptHash(bc.dao, id)
 }
 
 // GetNativeContractScriptHash returns native contract script hash by its name.

pkg/core/dao/dao.go

@@ -135,32 +135,6 @@ func (dao *Simple) putWithBuffer(entity io.Serializable, key []byte, buf *io.Buf
 	return nil
 }
 
-func (dao *Simple) makeContractIDKey(id int32) []byte {
-	key := dao.getKeyBuf(5)
-	key[0] = byte(storage.STContractID)
-	binary.BigEndian.PutUint32(key[1:], uint32(id))
-	return key
-}
-
-// DeleteContractID deletes contract's id to hash mapping.
-func (dao *Simple) DeleteContractID(id int32) {
-	dao.Store.Delete(dao.makeContractIDKey(id))
-}
-
-// PutContractID adds a mapping from a contract's ID to its hash.
-func (dao *Simple) PutContractID(id int32, hash util.Uint160) {
-	dao.Store.Put(dao.makeContractIDKey(id), hash.BytesBE())
-}
-
-// GetContractScriptHash retrieves the contract's hash given its ID.
-func (dao *Simple) GetContractScriptHash(id int32) (util.Uint160, error) {
-	var data = new(util.Uint160)
-	if err := dao.GetAndDecode(data, dao.makeContractIDKey(id)); err != nil {
-		return *data, err
-	}
-	return *data, nil
-}
-
 // -- start NEP-17 transfer info.
 
 func (dao *Simple) makeTTIKey(acc util.Uint160) []byte {

pkg/core/native/management.go

@@ -228,19 +228,24 @@ func GetContract(d *dao.Simple, hash util.Uint160) (*state.Contract, error) {
 
 // GetContractByID returns a contract with the given ID from the given DAO.
 func GetContractByID(d *dao.Simple, id int32) (*state.Contract, error) {
-	key := make([]byte, 5)
+	hash, err := GetContractScriptHash(d, id)
-	key = putHashKey(key, id)
-	si := d.GetStorageItem(ManagementContractID, key)
-	if si == nil {
-		return nil, storage.ErrKeyNotFound
-	}
-	hash, err := util.Uint160DecodeBytesBE(si)
 	if err != nil {
 		return nil, err
 	}
 	return GetContract(d, hash)
 }
 
+// GetContractScriptHash returns a contract hash associated with the given ID from the given DAO.
+func GetContractScriptHash(d *dao.Simple, id int32) (util.Uint160, error) {
+	key := make([]byte, 5)
+	key = putHashKey(key, id)
+	si := d.GetStorageItem(ManagementContractID, key)
+	if si == nil {
+		return util.Uint160{}, storage.ErrKeyNotFound
+	}
+	return util.Uint160DecodeBytesBE(si)
+}
+
 func getLimitedSlice(arg stackitem.Item, max int) ([]byte, error) {
 	_, isNull := arg.(stackitem.Null)
 	if isNull {
@@ -492,7 +497,6 @@ func (m *Management) Destroy(d *dao.Simple, hash util.Uint160) error {
 	d.DeleteStorageItem(m.ID, key)
 	key = putHashKey(key, contract.ID)
 	d.DeleteStorageItem(ManagementContractID, key)
-	d.DeleteContractID(contract.ID)
 
 	d.Seek(contract.ID, storage.SeekRange{}, func(k, _ []byte) bool {
 		d.DeleteStorageItem(contract.ID, k)
@@ -686,7 +690,6 @@ func putContractState(d *dao.Simple, cs *state.Contract, updateCache bool) error
 	}
 	key = putHashKey(key, cs.ID)
 	d.PutStorageItem(ManagementContractID, key, cs.Hash.BytesBE())
-	d.PutContractID(cs.ID, cs.Hash)
 	return nil
 }
 

pkg/core/storage/store.go

@@ -17,7 +17,6 @@ const (
 	// DataMPTAux is used to store additional MPT data like height-root
 	// mappings and local/validated heights.
 	DataMPTAux KeyPrefix = 0x04
-	STContractID KeyPrefix = 0x51
 	STStorage  KeyPrefix = 0x70
 	// STTempStorage is used to store contract storage items during state sync process
 	// in order not to mess up the previous state which has its own items stored by