Update master branch.

cmd/root.go

@@ -37,6 +37,7 @@ var rootCmd = &cobra.Command{
 	PersistentPreRun: initFuncs,
 }
 
+// Execute executes root Command.
 func Execute() {
 	log.Info("----- Starting vDB -----")
 	if err := rootCmd.Execute(); err != nil {

cmd/stateSnapshot.go

@@ -19,6 +19,7 @@ import (
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
+
 	"github.com/vulcanize/eth-pg-ipfs-state-snapshot/pkg/snapshot"
 )
 
@@ -37,7 +38,7 @@ var stateSnapshotCmd = &cobra.Command{
 }
 
 func stateSnapshot() {
-	snapConfig := snapshot.Config{}
+	snapConfig := &snapshot.Config{}
 	snapConfig.Init()
 	snapshotService, err := snapshot.NewSnapshotService(snapConfig)
 	if err != nil {

go.mod

@@ -1,16 +1,42 @@
 module github.com/vulcanize/eth-pg-ipfs-state-snapshot
 
-go 1.13
+go 1.15
 
 require (
+	github.com/btcsuite/btcd v0.22.0-beta // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/ethereum/go-ethereum v1.9.11
-	github.com/ipfs/go-ipfs-blockstore v1.0.0
+	github.com/fsnotify/fsnotify v1.5.1 // indirect
-	github.com/ipfs/go-ipfs-ds-help v1.0.0
+	github.com/go-kit/kit v0.10.0 // indirect
-	github.com/multiformats/go-multihash v0.0.13
+	github.com/google/go-cmp v0.5.6 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/gopherjs/gopherjs v0.0.0-20190430165422-3e4dfb77656c // indirect
+	github.com/ipfs/go-cid v0.1.0 // indirect
+	github.com/ipfs/go-datastore v0.5.1 // indirect
+	github.com/ipfs/go-ipfs-blockstore v1.1.2 // indirect
+	github.com/ipfs/go-log v1.0.5 // indirect
+	github.com/ipfs/go-log/v2 v2.4.0 // indirect
+	github.com/kr/pretty v0.3.0 // indirect
+	github.com/multiformats/go-base32 v0.0.4 // indirect
+	github.com/multiformats/go-multihash v0.1.0
+	github.com/onsi/ginkgo v1.16.5 // indirect
+	github.com/onsi/gomega v1.13.0 // indirect
 	github.com/sirupsen/logrus v1.6.0
+	github.com/smartystreets/assertions v1.0.0 // indirect
 	github.com/spf13/cobra v1.0.0
 	github.com/spf13/viper v1.7.0
-	github.com/vulcanize/ipfs-blockchain-watcher v0.0.11-alpha
+	go.uber.org/atomic v1.9.0 // indirect
+	go.uber.org/goleak v1.1.11 // indirect
+	go.uber.org/multierr v1.7.0 // indirect
+	go.uber.org/zap v1.19.1 // indirect
+	golang.org/x/crypto v0.0.0-20211209193657-4570a0811e8b // indirect
+	golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
+	golang.org/x/net v0.0.0-20211209124913-491a49abca63 // indirect
+	golang.org/x/sys v0.0.0-20211209171907-798191bca915 // indirect
+	golang.org/x/tools v0.1.8 // indirect
+	google.golang.org/appengine v1.6.6 // indirect
+	google.golang.org/protobuf v1.27.1 // indirect
+	lukechampine.com/blake3 v1.1.7 // indirect
 )
 
-replace github.com/ethereum/go-ethereum v1.9.11 => github.com/vulcanize/go-ethereum v1.9.11-statediff-0.0.2
+replace github.com/ethereum/go-ethereum v1.9.11 => github.com/vulcanize/go-ethereum v1.10.11-statediff-0.0.27

pkg/snapshot/config.go

@@ -16,10 +16,9 @@
 package snapshot
 
 import (
+	ethNode "github.com/ethereum/go-ethereum/statediff/indexer/node"
+	"github.com/ethereum/go-ethereum/statediff/indexer/postgres"
 	"github.com/spf13/viper"
-
-	"github.com/vulcanize/ipfs-blockchain-watcher/pkg/config"
-	"github.com/vulcanize/ipfs-blockchain-watcher/pkg/core"
 )
 
 const (
@@ -31,15 +30,18 @@ const (
 	LVL_DB_PATH       = "LVL_DB_PATH"
 )
 
+// Config is config parameters for DB.
 type Config struct {
 	LevelDBPath   string
 	AncientDBPath string
-	Node          core.Node
+	Node          ethNode.Info
-	DBConfig      config.Database
+	connectionURI string
+	DBConfig      postgres.ConnectionConfig
 }
 
+// Init Initialises config
 func (c *Config) Init() {
-	c.DBConfig.Init()
+	c.dbInit()
 	viper.BindEnv("leveldb.path", LVL_DB_PATH)
 	viper.BindEnv("ethereum.nodeID", ETH_NODE_ID)
 	viper.BindEnv("ethereum.clientName", ETH_CLIENT_NAME)
@@ -47,12 +49,38 @@ func (c *Config) Init() {
 	viper.BindEnv("ethereum.networkID", ETH_NETWORK_ID)
 	viper.BindEnv("leveldb.ancient", ANCIENT_DB_PATH)
 
-	c.Node = core.Node{
+	c.Node = ethNode.Info{
 		ID:           viper.GetString("ethereum.nodeID"),
 		ClientName:   viper.GetString("ethereum.clientName"),
 		GenesisBlock: viper.GetString("ethereum.genesisBlock"),
 		NetworkID:    viper.GetString("ethereum.networkID"),
+		ChainID:      viper.GetUint64("ethereum.chainID"),
 	}
 	c.LevelDBPath = viper.GetString("leveldb.path")
 	c.AncientDBPath = viper.GetString("leveldb.ancient")
 }
+
+func (c *Config) dbInit() {
+	viper.BindEnv("database.name", postgres.DATABASE_NAME)
+	viper.BindEnv("database.hostname", postgres.DATABASE_HOSTNAME)
+	viper.BindEnv("database.port", postgres.DATABASE_PORT)
+	viper.BindEnv("database.user", postgres.DATABASE_USER)
+	viper.BindEnv("database.password", postgres.DATABASE_PASSWORD)
+	viper.BindEnv("database.maxIdle", postgres.DATABASE_MAX_IDLE_CONNECTIONS)
+	viper.BindEnv("database.maxOpen", postgres.DATABASE_MAX_OPEN_CONNECTIONS)
+	viper.BindEnv("database.maxLifetime", postgres.DATABASE_MAX_CONN_LIFETIME)
+
+	dbParams := postgres.ConnectionParams{}
+	// DB params
+	dbParams.Name = viper.GetString("database.name")
+	dbParams.Hostname = viper.GetString("database.hostname")
+	dbParams.Port = viper.GetInt("database.port")
+	dbParams.User = viper.GetString("database.user")
+	dbParams.Password = viper.GetString("database.password")
+
+	c.connectionURI = postgres.DbConnectionString(dbParams)
+	// DB config
+	c.DBConfig.MaxIdle = viper.GetInt("database.maxIdle")
+	c.DBConfig.MaxOpen = viper.GetInt("database.maxOpen")
+	c.DBConfig.MaxLifetime = viper.GetInt("database.maxLifetime")
+}

pkg/snapshot/node_type.go

@@ -21,43 +21,43 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 )
 
-// Node for holding trie node information
+// node for holding trie node information
-type Node struct {
+type node struct {
-	NodeType NodeType
+	nodeType nodeType
-	Path     []byte
+	path     []byte
-	Key      common.Hash
+	key      common.Hash
-	Value    []byte
+	value    []byte
 }
 
-// NodeType for explicitly setting type of node
+// nodeType for explicitly setting type of node
-type NodeType int
+type nodeType int
 
 const (
-	Branch NodeType = iota
+	branch nodeType = iota
-	Extension
+	extension
-	Leaf
+	leaf
-	Removed
+	removed
-	Unknown
+	unknown
 )
 
 // CheckKeyType checks what type of key we have
-func CheckKeyType(elements []interface{}) (NodeType, error) {
+func CheckKeyType(elements []interface{}) (nodeType, error) {
 	if len(elements) > 2 {
-		return Branch, nil
+		return branch, nil
 	}
 	if len(elements) < 2 {
-		return Unknown, fmt.Errorf("node cannot be less than two elements in length")
+		return unknown, fmt.Errorf("node cannot be less than two elements in length")
 	}
 	switch elements[0].([]byte)[0] / 16 {
 	case '\x00':
-		return Extension, nil
+		return extension, nil
 	case '\x01':
-		return Extension, nil
+		return extension, nil
 	case '\x02':
-		return Leaf, nil
+		return leaf, nil
 	case '\x03':
-		return Leaf, nil
+		return leaf, nil
 	default:
-		return Unknown, fmt.Errorf("unknown hex prefix")
+		return unknown, fmt.Errorf("unknown hex prefix")
 	}
 }

pkg/snapshot/publisher.go

@@ -17,24 +17,26 @@ package snapshot
 
 import (
 	"bytes"
+	"fmt"
 
+	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ipfs/go-ipfs-blockstore"
-	"github.com/ipfs/go-ipfs-ds-help"
 	"github.com/multiformats/go-multihash"
 
-	"github.com/vulcanize/ipfs-blockchain-watcher/pkg/ipfs/ipld"
+	"github.com/ethereum/go-ethereum/statediff/indexer/ipfs/ipld"
-	"github.com/vulcanize/ipfs-blockchain-watcher/pkg/postgres"
+	"github.com/ethereum/go-ethereum/statediff/indexer/postgres"
-	"github.com/vulcanize/ipfs-blockchain-watcher/pkg/shared"
+	"github.com/ethereum/go-ethereum/statediff/indexer/shared"
 )
 
+// Publisher is wrapper around DB.
 type Publisher struct {
-	db *postgres.DB
+	db            *postgres.DB
 }
 
+// NewPublisher creates Publisher
 func NewPublisher(db *postgres.DB) *Publisher {
 	return &Publisher{
-		db: db,
+		db:            db,
 	}
 }
 
@@ -44,10 +46,12 @@ func (p *Publisher) PublishHeader(header *types.Header) (int64, error) {
 	if err != nil {
 		return 0, err
 	}
+
 	tx, err := p.db.Beginx()
 	if err != nil {
 		return 0, err
 	}
+
 	defer func() {
 		if p := recover(); p != nil {
 			shared.Rollback(tx)
@@ -58,9 +62,11 @@ func (p *Publisher) PublishHeader(header *types.Header) (int64, error) {
 			err = tx.Commit()
 		}
 	}()
-	if err := shared.PublishIPLD(tx, headerNode); err != nil {
+
+	if err = shared.PublishIPLD(tx, headerNode); err != nil {
 		return 0, err
 	}
+
 	mhKey, _ := shared.MultihashKeyFromCIDString(headerNode.Cid().String())
 	var headerID int64
 	err = tx.QueryRowx(`INSERT INTO eth.header_cids (block_number, block_hash, parent_hash, cid, td, node_id, reward, state_root, tx_root, receipt_root, uncle_root, bloom, timestamp, mh_key, times_validated)
@@ -69,86 +75,112 @@ func (p *Publisher) PublishHeader(header *types.Header) (int64, error) {
  								RETURNING id`,
 		header.Number.Uint64(), header.Hash().Hex(), header.ParentHash.Hex(), headerNode.Cid().String(), "0", p.db.NodeID, "0", header.Root.Hex(), header.TxHash.Hex(),
 		header.ReceiptHash.Hex(), header.UncleHash.Hex(), header.Bloom.Bytes(), header.Time, mhKey, 0).Scan(&headerID)
+
 	return headerID, err
 }
 
 // PublishStateNode writes the state node to the ipfs backing datastore and adds secondary indexes in the state_cids table
-func (p *Publisher) PublishStateNode(node Node, headerID int64) (int64, error) {
+func (p *Publisher) PublishStateNode(node *node, headerID int64) (int64, error) {
 	var stateID int64
 	var stateKey string
-	if !bytes.Equal(node.Key.Bytes(), nullHash.Bytes()) {
+	if !bytes.Equal(node.key.Bytes(), nullHash.Bytes()) {
-		stateKey = node.Key.Hex()
+		stateKey = node.key.Hex()
 	}
+
 	tx, err := p.db.Beginx()
 	if err != nil {
 		return 0, err
 	}
+
 	defer func() {
-		if p := recover(); p != nil {
+		if rec := recover(); rec != nil {
 			shared.Rollback(tx)
-			panic(p)
+			panic(rec)
 		} else if err != nil {
 			shared.Rollback(tx)
 		} else {
 			err = tx.Commit()
 		}
 	}()
-	stateCIDStr, err := shared.PublishRaw(tx, ipld.MEthStateTrie, multihash.KECCAK_256, node.Value)
+
+	stateCIDStr, mhKey, err := shared.PublishRaw(tx, ipld.MEthStateTrie, multihash.KECCAK_256, node.value)
 	if err != nil {
 		return 0, err
 	}
-	mhKey, _ := shared.MultihashKeyFromCIDString(stateCIDStr)
+
 	err = tx.QueryRowx(`INSERT INTO eth.state_cids (header_id, state_leaf_key, cid, state_path, node_type, diff, mh_key) VALUES ($1, $2, $3, $4, $5, $6, $7)
- 									ON CONFLICT (header_id, state_path) DO UPDATE SET state_path = state_cids.state_path
+ 									ON CONFLICT (header_id, state_path) DO UPDATE SET (state_leaf_key, cid, node_type, diff, mh_key) = ($2, $3, $5, $6, $7)
  									RETURNING id`,
-		headerID, stateKey, stateCIDStr, node.Path, node.NodeType, false, mhKey).Scan(&stateID)
+		headerID, stateKey, stateCIDStr, node.path, node.nodeType, false, mhKey).Scan(&stateID)
+
 	return stateID, err
 }
 
 // PublishStorageNode writes the storage node to the ipfs backing pg datastore and adds secondary indexes in the storage_cids table
-func (p *Publisher) PublishStorageNode(node Node, stateID int64) error {
+func (p *Publisher) PublishStorageNode(node *node, stateID int64) error {
 	var storageKey string
-	if !bytes.Equal(node.Key.Bytes(), nullHash.Bytes()) {
+	if !bytes.Equal(node.key.Bytes(), nullHash.Bytes()) {
-		storageKey = node.Key.Hex()
+		storageKey = node.key.Hex()
 	}
+
 	tx, err := p.db.Beginx()
 	if err != nil {
 		return err
 	}
+
 	defer func() {
-		if p := recover(); p != nil {
+		if rec := recover(); rec != nil {
 			shared.Rollback(tx)
-			panic(p)
+			panic(rec)
 		} else if err != nil {
 			shared.Rollback(tx)
 		} else {
 			err = tx.Commit()
 		}
 	}()
-	storageCIDStr, err := shared.PublishRaw(tx, ipld.MEthStorageTrie, multihash.KECCAK_256, node.Value)
+
+	storageCIDStr, mhKey, err := shared.PublishRaw(tx, ipld.MEthStorageTrie, multihash.KECCAK_256, node.value)
 	if err != nil {
 		return err
 	}
-	mhKey, _ := shared.MultihashKeyFromCIDString(storageCIDStr)
+
-	_, err = tx.Exec(`INSERT INTO eth.storage_cids (state_id, storage_leaf_key, cid, storage_path, node_type, diff, mh_key) VALUES ($1, $2, $3, $4, $5, $6, $7) 
+	_, err = tx.Exec(`INSERT INTO eth.storage_cids (state_id, storage_leaf_key, cid, storage_path, node_type, diff, mh_key) VALUES ($1, $2, $3, $4, $5, $6, $7)
- 							  ON CONFLICT (state_id, storage_path) DO NOTHING`,
+                              	ON CONFLICT (state_id, storage_path) DO UPDATE SET (storage_leaf_key, cid, node_type, diff, mh_key) = ($2, $3, $5, $6, $7)`,
-		stateID, storageKey, storageCIDStr, node.Path, node.NodeType, false, mhKey)
+		stateID, storageKey, storageCIDStr, node.path, node.nodeType, false, mhKey)
-	return err
+	if err != nil {
+		return err
+	}
+
+	return nil
 }
 
 // PublishCode writes code to the ipfs backing pg datastore
-func (p *Publisher) PublishCode(code []byte) error {
+func (p *Publisher) PublishCode(codeHash common.Hash, codeBytes []byte) error {
 	// no codec for code, doesn't matter though since blockstore key is multihash-derived
-	return p.publishRaw(ipld.MEthStorageTrie, multihash.KECCAK_256, code)
+	mhKey, err := shared.MultihashKeyFromKeccak256(codeHash)
-}
+	if err != nil {
+		return fmt.Errorf("error deriving multihash key from codehash: %v", err)
+	}
 
-func (p *Publisher) publishRaw(codec, mh uint64, raw []byte) error {
+	tx, err := p.db.Beginx()
-	c, err := ipld.RawdataToCid(codec, raw, mh)
 	if err != nil {
 		return err
 	}
-	dbKey := dshelp.MultihashToDsKey(c.Hash())
+
-	prefixedKey := blockstore.BlockPrefix.String() + dbKey.String()
+	defer func() {
-	_, err = p.db.Exec(`INSERT INTO public.blocks (key, data) VALUES ($1, $2) ON CONFLICT (key) DO NOTHING`, prefixedKey, raw)
+		if rec := recover(); rec != nil {
-	return err
+			shared.Rollback(tx)
-}
+			panic(rec)
+		} else if err != nil {
+			shared.Rollback(tx)
+		} else {
+			err = tx.Commit()
+		}
+	}()
+
+	if err = shared.PublishDirect(tx, mhKey, codeBytes); err != nil {
+		return fmt.Errorf("error publishing code IPLD: %v", err)
+	}
+
+	return nil
+}

pkg/snapshot/service.go

@@ -23,13 +23,13 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/ethereum/go-ethereum/statediff/indexer/postgres"
 	"github.com/ethereum/go-ethereum/trie"
 	"github.com/sirupsen/logrus"
-
-	"github.com/vulcanize/ipfs-blockchain-watcher/pkg/postgres"
 )
 
 var (
@@ -39,54 +39,67 @@ var (
 	emptyContractRoot = crypto.Keccak256Hash(emptyNode)
 )
 
+// Service holds ethDB and stateDB to read data from lvldb and Publisher
+// to publish trie in postgres DB.
 type Service struct {
 	ethDB         ethdb.Database
 	stateDB       state.Database
 	ipfsPublisher *Publisher
 }
 
-func NewSnapshotService(con Config) (*Service, error) {
+// NewSnapshotService creates Service.
-	pgdb, err := postgres.NewDB(con.DBConfig, con.Node)
+func NewSnapshotService(con *Config) (*Service, error) {
+	pgDB, err := postgres.NewDB(con.connectionURI, con.DBConfig, con.Node)
 	if err != nil {
 		return nil, err
 	}
-	edb, err := rawdb.NewLevelDBDatabaseWithFreezer(con.LevelDBPath, 1024, 256, con.AncientDBPath, "eth-pg-ipfs-state-snapshot")
+
+	edb, err := rawdb.NewLevelDBDatabaseWithFreezer(con.LevelDBPath, 1024, 256, con.AncientDBPath, "eth-pg-ipfs-state-snapshot", false)
 	if err != nil {
 		return nil, err
 	}
+
 	return &Service{
 		ethDB:         edb,
 		stateDB:       state.NewDatabase(edb),
-		ipfsPublisher: NewPublisher(pgdb),
+		ipfsPublisher: NewPublisher(pgDB),
 	}, nil
 }
 
+// CreateLatestSnapshot creates snapshot for the latest block.
 func (s *Service) CreateLatestSnapshot() error {
 	// extract header from lvldb and publish to PG-IPFS
 	// hold onto the headerID so that we can link the state nodes to this header
 	logrus.Info("Creating snapshot at head")
+
 	hash := rawdb.ReadHeadHeaderHash(s.ethDB)
 	height := rawdb.ReadHeaderNumber(s.ethDB, hash)
 	if height == nil {
 		return fmt.Errorf("unable to read header height for header hash %s", hash.String())
 	}
+
 	header := rawdb.ReadHeader(s.ethDB, hash, *height)
 	if header == nil {
 		return fmt.Errorf("unable to read canonical header at height %d", height)
 	}
+
 	logrus.Infof("head hash: %s head height: %d", hash.Hex(), *height)
+
 	headerID, err := s.ipfsPublisher.PublishHeader(header)
 	if err != nil {
 		return err
 	}
+
 	t, err := s.stateDB.OpenTrie(header.Root)
 	if err != nil {
 		return err
 	}
+
 	trieDB := s.stateDB.TrieDB()
 	return s.createSnapshot(t.NodeIterator([]byte{}), trieDB, headerID)
 }
 
+// CreateSnapshot creates snapshot for given block height.
 func (s *Service) CreateSnapshot(height uint64) error {
 	// extract header from lvldb and publish to PG-IPFS
 	// hold onto the headerID so that we can link the state nodes to this header
@@ -96,14 +109,17 @@ func (s *Service) CreateSnapshot(height uint64) error {
 	if header == nil {
 		return fmt.Errorf("unable to read canonical header at height %d", height)
 	}
+
 	headerID, err := s.ipfsPublisher.PublishHeader(header)
 	if err != nil {
 		return err
 	}
+
 	t, err := s.stateDB.OpenTrie(header.Root)
 	if err != nil {
 		return err
 	}
+
 	trieDB := s.stateDB.TrieDB()
 	return s.createSnapshot(t.NodeIterator([]byte{}), trieDB, headerID)
 }
@@ -113,59 +129,79 @@ func (s *Service) createSnapshot(it trie.NodeIterator, trieDB *trie.Database, he
 		if it.Leaf() { // "leaf" nodes are actually "value" nodes, whose parents are the actual leaves
 			continue
 		}
+
 		if bytes.Equal(nullHash.Bytes(), it.Hash().Bytes()) {
 			continue
 		}
+
 		nodePath := make([]byte, len(it.Path()))
 		copy(nodePath, it.Path())
-		node, err := trieDB.Node(it.Hash())
+
+		var (
+			nodeData []byte
+			ty       nodeType
+			err      error
+		)
+
+		nodeData, err = trieDB.Node(it.Hash())
 		if err != nil {
 			return err
 		}
+
 		var nodeElements []interface{}
-		if err := rlp.DecodeBytes(node, &nodeElements); err != nil {
+		if err = rlp.DecodeBytes(nodeData, &nodeElements); err != nil {
 			return err
 		}
-		ty, err := CheckKeyType(nodeElements)
+
+		ty, err = CheckKeyType(nodeElements)
 		if err != nil {
 			return err
 		}
-		stateNode := Node{
+
-			NodeType: ty,
+		stateNode := &node{
-			Path:     nodePath,
+			nodeType: ty,
-			Value:    node,
+			path:     nodePath,
+			value:    nodeData,
 		}
+
 		switch ty {
-		case Leaf:
+		case leaf:
 			// if the node is a leaf, decode the account and publish the associated storage trie nodes if there are any
-			var account state.Account
+			var account types.StateAccount
-			if err := rlp.DecodeBytes(nodeElements[1].([]byte), &account); err != nil {
+			if err = rlp.DecodeBytes(nodeElements[1].([]byte), &account); err != nil {
-				return fmt.Errorf("error decoding account for leaf node at path %x nerror: %v", nodePath, err)
+				return fmt.Errorf("error decoding account for leaf node at path %x nerror: %w", nodePath, err)
 			}
+
 			partialPath := trie.CompactToHex(nodeElements[0].([]byte))
 			valueNodePath := append(nodePath, partialPath...)
 			encodedPath := trie.HexToCompact(valueNodePath)
 			leafKey := encodedPath[1:]
-			stateNode.Key = common.BytesToHash(leafKey)
+			stateNode.key = common.BytesToHash(leafKey)
+
 			stateID, err := s.ipfsPublisher.PublishStateNode(stateNode, headerID)
 			if err != nil {
 				return err
 			}
+
 			// publish any non-nil code referenced by codehash
 			if !bytes.Equal(account.CodeHash, emptyCodeHash) {
-				codeBytes, err := s.ethDB.Get(account.CodeHash)
+				codeHash := common.BytesToHash(account.CodeHash)
-				if err != nil {
+				codeBytes := rawdb.ReadCode(s.ethDB, codeHash)
-					return err
+				if len(codeBytes) == 0 {
+					logrus.Error("Code is missing", "account", common.BytesToHash(it.LeafKey()))
+					return errors.New("missing code")
 				}
-				if err := s.ipfsPublisher.PublishCode(codeBytes); err != nil {
+
+				if err = s.ipfsPublisher.PublishCode(codeHash, codeBytes); err != nil {
 					return err
 				}
 			}
-			if err := s.storageSnapshot(account.Root, stateID); err != nil {
+
-				return fmt.Errorf("failed building storage snapshot for account %+v\r\nerror: %v", account, err)
+			if err = s.storageSnapshot(account.Root, stateID); err != nil {
+				return fmt.Errorf("failed building storage snapshot for account %+v\r\nerror: %w", account, err)
 			}
-		case Extension, Branch:
+		case extension, branch:
-			stateNode.Key = common.BytesToHash([]byte{})
+			stateNode.key = common.BytesToHash([]byte{})
 			if _, err := s.ipfsPublisher.PublishStateNode(stateNode, headerID); err != nil {
 				return err
 			}
@@ -180,53 +216,69 @@ func (s *Service) storageSnapshot(sr common.Hash, stateID int64) error {
 	if bytes.Equal(sr.Bytes(), emptyContractRoot.Bytes()) {
 		return nil
 	}
+
 	sTrie, err := s.stateDB.OpenTrie(sr)
 	if err != nil {
 		return err
 	}
+
 	it := sTrie.NodeIterator(make([]byte, 0))
 	for it.Next(true) {
 		// skip value nodes
 		if it.Leaf() {
 			continue
 		}
+
 		if bytes.Equal(nullHash.Bytes(), it.Hash().Bytes()) {
 			continue
 		}
+
 		nodePath := make([]byte, len(it.Path()))
 		copy(nodePath, it.Path())
-		node, err := s.stateDB.TrieDB().Node(it.Hash())
+
+		var (
+			nodeData []byte
+			ty       nodeType
+		)
+
+		nodeData, err = s.stateDB.TrieDB().Node(it.Hash())
 		if err != nil {
 			return err
 		}
+
 		var nodeElements []interface{}
-		if err := rlp.DecodeBytes(node, &nodeElements); err != nil {
+		if err = rlp.DecodeBytes(nodeData, &nodeElements); err != nil {
 			return err
 		}
-		ty, err := CheckKeyType(nodeElements)
+
+		ty, err = CheckKeyType(nodeElements)
 		if err != nil {
 			return err
 		}
-		storageNode := Node{
+
-			NodeType: ty,
+		storageNode := &node{
-			Path:     nodePath,
+			nodeType: ty,
-			Value:    node,
+			path:     nodePath,
+			value:    nodeData,
 		}
+
 		switch ty {
-		case Leaf:
+		case leaf:
 			partialPath := trie.CompactToHex(nodeElements[0].([]byte))
 			valueNodePath := append(nodePath, partialPath...)
 			encodedPath := trie.HexToCompact(valueNodePath)
 			leafKey := encodedPath[1:]
-			storageNode.Key = common.BytesToHash(leafKey)
+			storageNode.key = common.BytesToHash(leafKey)
-		case Extension, Branch:
+		case extension, branch:
-			storageNode.Key = common.BytesToHash([]byte{})
+			storageNode.key = common.BytesToHash([]byte{})
 		default:
 			return errors.New("unexpected node type")
 		}
-		if err := s.ipfsPublisher.PublishStorageNode(storageNode, stateID); err != nil {
+
+		if err = s.ipfsPublisher.PublishStorageNode(storageNode, stateID); err != nil {
 			return err
 		}
 	}
+
 	return it.Error()
 }