From c6fadc1e1fac09d2679217a1ea296f83ba0b6074 Mon Sep 17 00:00:00 2001
From: "mergify[bot]" <37929162+mergify[bot]@users.noreply.github.com>
Date: Wed, 8 Dec 2021 12:09:47 +0100
Subject: [PATCH] cmd: cosmetic changes for errors and print statements (#7377)
 (#7408)

---
 cmd/tendermint/commands/reindex_event.go      | 10 +++++++++
 cmd/tendermint/commands/reindex_event_test.go | 22 +++++++++++++++++--
 cmd/tendermint/commands/rollback.go           |  2 +-
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/cmd/tendermint/commands/reindex_event.go b/cmd/tendermint/commands/reindex_event.go
index 58f11657b..bd9577963 100644
--- a/cmd/tendermint/commands/reindex_event.go
+++ b/cmd/tendermint/commands/reindex_event.go
@@ -3,6 +3,7 @@ package commands
 import (
 	"errors"
 	"fmt"
+	"path/filepath"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -16,6 +17,7 @@ import (
 	"github.com/tendermint/tendermint/internal/state/indexer/sink/kv"
 	"github.com/tendermint/tendermint/internal/state/indexer/sink/psql"
 	"github.com/tendermint/tendermint/internal/store"
+	"github.com/tendermint/tendermint/libs/os"
 	"github.com/tendermint/tendermint/rpc/coretypes"
 	"github.com/tendermint/tendermint/types"
 )
@@ -132,6 +134,10 @@ func loadEventSinks(cfg *tmcfg.Config) ([]indexer.EventSink, error) {
 func loadStateAndBlockStore(cfg *tmcfg.Config) (*store.BlockStore, state.Store, error) {
 	dbType := dbm.BackendType(cfg.DBBackend)
 
+	if !os.FileExists(filepath.Join(cfg.DBDir(), "blockstore.db")) {
+		return nil, nil, fmt.Errorf("no blockstore found in %v", cfg.DBDir())
+	}
+
 	// Get BlockStore
 	blockStoreDB, err := dbm.NewDB("blockstore", dbType, cfg.DBDir())
 	if err != nil {
@@ -139,6 +145,10 @@ func loadStateAndBlockStore(cfg *tmcfg.Config) (*store.BlockStore, state.Store,
 	}
 	blockStore := store.NewBlockStore(blockStoreDB)
 
+	if !os.FileExists(filepath.Join(cfg.DBDir(), "state.db")) {
+		return nil, nil, fmt.Errorf("no blockstore found in %v", cfg.DBDir())
+	}
+
 	// Get StateStore
 	stateDB, err := dbm.NewDB("state", dbType, cfg.DBDir())
 	if err != nil {
diff --git a/cmd/tendermint/commands/reindex_event_test.go b/cmd/tendermint/commands/reindex_event_test.go
index c76ce6d9a..2008251bc 100644
--- a/cmd/tendermint/commands/reindex_event_test.go
+++ b/cmd/tendermint/commands/reindex_event_test.go
@@ -15,6 +15,7 @@ import (
 	"github.com/tendermint/tendermint/internal/state/mocks"
 	prototmstate "github.com/tendermint/tendermint/proto/tendermint/state"
 	"github.com/tendermint/tendermint/types"
+	dbm "github.com/tendermint/tm-db"
 
 	_ "github.com/lib/pq" // for the psql sink
 )
@@ -109,12 +110,29 @@ func TestLoadEventSink(t *testing.T) {
 }
 
 func TestLoadBlockStore(t *testing.T) {
-	bs, ss, err := loadStateAndBlockStore(tmcfg.TestConfig())
+	testCfg, err := tmcfg.ResetTestRoot(t.Name())
+	require.NoError(t, err)
+	testCfg.DBBackend = "goleveldb"
+	_, _, err = loadStateAndBlockStore(testCfg)
+	// we should return an error because the state store and block store
+	// don't yet exist
+	require.Error(t, err)
+
+	dbType := dbm.BackendType(testCfg.DBBackend)
+	bsdb, err := dbm.NewDB("blockstore", dbType, testCfg.DBDir())
+	require.NoError(t, err)
+	bsdb.Close()
+
+	ssdb, err := dbm.NewDB("state", dbType, testCfg.DBDir())
+	require.NoError(t, err)
+	ssdb.Close()
+
+	bs, ss, err := loadStateAndBlockStore(testCfg)
 	require.NoError(t, err)
 	require.NotNil(t, bs)
 	require.NotNil(t, ss)
-
 }
+
 func TestReIndexEvent(t *testing.T) {
 	mockBlockStore := &mocks.BlockStore{}
 	mockStateStore := &mocks.Store{}
diff --git a/cmd/tendermint/commands/rollback.go b/cmd/tendermint/commands/rollback.go
index 5aff232be..b42725ee5 100644
--- a/cmd/tendermint/commands/rollback.go
+++ b/cmd/tendermint/commands/rollback.go
@@ -26,7 +26,7 @@ application.
 			return fmt.Errorf("failed to rollback state: %w", err)
 		}
 
-		fmt.Printf("Rolled back state to height %d and hash %v", height, hash)
+		fmt.Printf("Rolled back state to height %d and hash %X", height, hash)
 		return nil
 	},
 }