tool to read tip of state db

Makefile

@@ -24,6 +24,7 @@ BUILD_TARGET_XCTL=xctl
 BUILD_TARGET_NEWXCTL=newxctl
 BUILD_TARGET_MINICLUSTER=minicluster
 BUILD_TARGET_RECOVER=recover
+BUILD_TARGET_READTIP=readtip
 BUILD_TARGET_IOMIGRATER=iomigrater
 BUILD_TARGET_OS=$(shell go env GOOS)
 BUILD_TARGET_ARCH=$(shell go env GOARCH)
@@ -78,7 +79,7 @@ build: ioctl
  $(GOBUILD) -ldflags "$(PackageFlags)" -o ./bin/$(BUILD_TARGET_SERVER) -v ./$(BUILD_TARGET_SERVER)
 
 .PHONY: build-all
-build-all: build build-actioninjector build-addrgen build-minicluster build-staterecoverer
+build-all: build build-actioninjector build-addrgen build-minicluster build-staterecoverer build-readtip
 
 .PHONY: build-actioninjector
 build-actioninjector: 
@@ -96,6 +97,10 @@ build-minicluster:
 build-staterecoverer:
  $(GOBUILD) -o ./bin/$(BUILD_TARGET_RECOVER) -v ./tools/staterecoverer
 
+.PHONY: build-readtip
+build-readtip:
+ $(GOBUILD) -o ./bin/$(BUILD_TARGET_READTIP) -v ./tools/readtip
+
 .PHONY: fmt
 fmt:
  $(GOCMD) fmt ./...

db/config.go

@@ -27,6 +27,8 @@ type Config struct {
  SplitDBHeight uint64 `yaml:"splitDBHeight"`
  // HistoryStateRetention is the number of blocks account/contract state will be retained
  HistoryStateRetention uint64 `yaml:"historyStateRetention"`
+ // ReadOnly is set db to be opened in read only mode
+ ReadOnly bool `yaml:"readOnly"`
 }
 
 // SplitDBSize returns the configured SplitDBSizeMB

db/db_bolt.go

@@ -45,7 +45,11 @@ func NewBoltDB(cfg Config) *BoltDB {
 
 // Start opens the BoltDB (creates new file if not existing yet)
 func (b *BoltDB) Start(_ context.Context) error {
- db, err := bolt.Open(b.path, _fileMode, nil)
+ opts := *bolt.DefaultOptions
+ if b.config.ReadOnly {
+ opts.ReadOnly = true
+ }
+ db, err := bolt.Open(b.path, _fileMode, &opts)
  if err != nil {
  return errors.Wrap(ErrIO, err.Error())
  }

tools/readtip/main.go

@@ -0,0 +1,58 @@
+// Copyright (c) 2019 IoTeX Foundation
+// This is an alpha (internal) release and is not suitable for production. This source code is provided 'as is' and no
+// warranties are given as to title or non-infringement, merchantability or fitness for purpose and, to the extent
+// permitted by law, all liability for your use of the code is disclaimed. This source code is governed by Apache
+// License 2.0 that can be found in the LICENSE file.
+
+// This is a recovery tool that recovers a corrupted or missing state database.
+// To use, run "make recover"
+package main
+
+import (
+ "flag"
+ "fmt"
+ "os"
+
+ "go.uber.org/zap"
+
+ "github.com/iotexproject/iotex-core/config"
+ "github.com/iotexproject/iotex-core/db"
+ "github.com/iotexproject/iotex-core/pkg/log"
+ "github.com/iotexproject/iotex-core/pkg/util/byteutil"
+ "github.com/iotexproject/iotex-core/state/factory"
+)
+
+var (
+ // overwritePath is the path to the config file which overwrite default values
+ _overwritePath string
+ // secretPath is the path to the config file store secret values
+ _secretPath string
+)
+
+func init() {
+ flag.StringVar(&_overwritePath, "config-path", "", "Config path")
+ flag.StringVar(&_secretPath, "secret-path", "", "Secret path")
+ flag.Usage = func() {
+ _, _ = fmt.Fprintf(os.Stderr, "usage: readtip -config-path=[string]\n")
+ flag.PrintDefaults()
+ os.Exit(2)
+ }
+ flag.Parse()
+}
+
+func main() {
+ cfg, err := config.New([]string{_overwritePath, _secretPath}, []string{})
+ if err != nil {
+ log.S().Panic("failed to new config.", zap.Error(err))
+ }
+ cfg.DB.ReadOnly = true
+ store, err := db.CreateKVStore(cfg.DB, cfg.Chain.TrieDBPath)
+ if err != nil {
+ log.S().Panic("failed to load state db", zap.Error(err))
+ }
+ h, err := store.Get(factory.AccountKVNamespace, []byte(factory.CurrentHeightKey))
+ if err != nil {
+ log.S().Panic("failed to read state db", zap.Error(err))
+ }
+ fmt.Println(byteutil.BytesToUint64(h))
+}