Merge remote-tracking branch 'origin/master' into tychoish/adr-node-init

2026-02-11 22:31:09 +00:00 · 2021-07-28 12:07:13 -04:00
parent 30ebf482ab 6ff4c3139c
commit 4beeebce1a
65 changed files with 1159 additions and 301 deletions
--- a/CHANGELOG_PENDING.md
+++ b/CHANGELOG_PENDING.md
@@ -72,6 +72,8 @@ Friendly reminder: We have a [bug bounty program](https://hackerone.com/tendermi
  - [crypto/sr25519] \#6526 Do not re-execute the Ed25519-style key derivation step when doing signing and verification.  The derivation is now done once and only once.  This breaks `sr25519.GenPrivKeyFromSecret` output compatibility. (@Yawning)
  - [types] \#6627 Move `NodeKey` to types to make the type public. 
  - [config] \#6627 Extend `config` to contain methods `LoadNodeKeyID` and `LoadorGenNodeKeyID`
+  - [blocksync] \#6755 Rename `FastSync` and `Blockchain` package to `BlockSync`
+    (@cmwaters)

 - Blockchain Protocol

@@ -82,6 +84,7 @@ Friendly reminder: We have a [bug bounty program](https://hackerone.com/tendermi

 - Tooling
  - [tools] \#6498 Set OS home dir to instead of the hardcoded PATH. (@JayT106)
+  - [cli/indexer] \#6676 Reindex events command line tooling. (@JayT106)

 ### FEATURES

--- a/UPGRADING.md
+++ b/UPGRADING.md
@@ -17,7 +17,7 @@ This guide provides instructions for upgrading to specific versions of Tendermin

 ### Config Changes

-* `fast_sync = "v1"` is no longer supported. Please use `v2` instead.
+* `fast_sync = "v1"` and `fast_sync = "v2"` are no longer supported. Please use `v0` instead.

 * All config parameters are now hyphen-case (also known as kebab-case) instead of snake_case. Before restarting the node make sure
  you have updated all the variables in your `config.toml` file.
@@ -29,10 +29,11 @@ This guide provides instructions for upgrading to specific versions of Tendermin
  `Seeds`. Bootstrap peers are connected with on startup if needed for peer discovery. Unlike
  persistent peers, there's no gaurantee that the node will remain connected with these peers. 

- configuration values starting with `priv-validator-` have moved to the new
+* configuration values starting with `priv-validator-` have moved to the new
  `priv-validator` section, without the `priv-validator-` prefix.

-* Fast Sync v2 has been deprecated, please use v0 to sync a node.
+* The fast sync process as well as the blockchain package and service has all
+  been renamed to block sync

 ### CLI Changes

--- a/cmd/tendermint/commands/reindex_event.go
+++ b/cmd/tendermint/commands/reindex_event.go
@@ -0,0 +1,251 @@
+package commands
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/spf13/cobra"
+	tmdb "github.com/tendermint/tm-db"
+
+	abcitypes "github.com/tendermint/tendermint/abci/types"
+	tmcfg "github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/internal/libs/progressbar"
+	ctypes "github.com/tendermint/tendermint/rpc/core/types"
+	"github.com/tendermint/tendermint/state"
+	"github.com/tendermint/tendermint/state/indexer"
+	"github.com/tendermint/tendermint/state/indexer/sink/kv"
+	"github.com/tendermint/tendermint/state/indexer/sink/psql"
+	"github.com/tendermint/tendermint/store"
+	"github.com/tendermint/tendermint/types"
+)
+
+const (
+	reindexFailed = "event re-index failed: "
+)
+
+// ReIndexEventCmd allows re-index the event by given block height interval
+var ReIndexEventCmd = &cobra.Command{
+	Use:   "reindex-event",
+	Short: "reindex events to the event store backends",
+	Long: `
+	reindex-event is an offline tooling to re-index block and tx events to the eventsinks,
+	you can run this command when the event store backend dropped/disconnected or you want to replace the backend.
+	The default start-height is 0, meaning the tooling will start reindex from the base block height(inclusive); and the 
+	default end-height is 0, meaning the tooling will reindex until the latest block height(inclusive). User can omits
+	either or both arguments.
+	`,
+	Example: `
+	tendermint reindex-event
+	tendermint reindex-event --start-height 2
+	tendermint reindex-event --end-height 10
+	tendermint reindex-event --start-height 2 --end-height 10
+	`,
+	Run: func(cmd *cobra.Command, args []string) {
+		bs, ss, err := loadStateAndBlockStore(config)
+		if err != nil {
+			fmt.Println(reindexFailed, err)
+			return
+		}
+
+		if err := checkValidHeight(bs); err != nil {
+			fmt.Println(reindexFailed, err)
+			return
+		}
+
+		es, err := loadEventSinks(config)
+		if err != nil {
+			fmt.Println(reindexFailed, err)
+			return
+		}
+
+		if err = eventReIndex(cmd, es, bs, ss); err != nil {
+			fmt.Println(reindexFailed, err)
+			return
+		}
+
+		fmt.Println("event re-index finished")
+	},
+}
+
+var (
+	startHeight int64
+	endHeight   int64
+)
+
+func init() {
+	ReIndexEventCmd.Flags().Int64Var(&startHeight, "start-height", 0, "the block height would like to start for re-index")
+	ReIndexEventCmd.Flags().Int64Var(&endHeight, "end-height", 0, "the block height would like to finish for re-index")
+}
+
+func loadEventSinks(cfg *tmcfg.Config) ([]indexer.EventSink, error) {
+	// Check duplicated sinks.
+	sinks := map[string]bool{}
+	for _, s := range cfg.TxIndex.Indexer {
+		sl := strings.ToLower(s)
+		if sinks[sl] {
+			return nil, errors.New("found duplicated sinks, please check the tx-index section in the config.toml")
+		}
+		sinks[sl] = true
+	}
+
+	eventSinks := []indexer.EventSink{}
+
+	for k := range sinks {
+		switch k {
+		case string(indexer.NULL):
+			return nil, errors.New("found null event sink, please check the tx-index section in the config.toml")
+		case string(indexer.KV):
+			store, err := tmcfg.DefaultDBProvider(&tmcfg.DBContext{ID: "tx_index", Config: cfg})
+			if err != nil {
+				return nil, err
+			}
+			eventSinks = append(eventSinks, kv.NewEventSink(store))
+		case string(indexer.PSQL):
+			conn := cfg.TxIndex.PsqlConn
+			if conn == "" {
+				return nil, errors.New("the psql connection settings cannot be empty")
+			}
+			es, _, err := psql.NewEventSink(conn, chainID)
+			if err != nil {
+				return nil, err
+			}
+			eventSinks = append(eventSinks, es)
+		default:
+			return nil, errors.New("unsupported event sink type")
+		}
+	}
+
+	if len(eventSinks) == 0 {
+		return nil, errors.New("no proper event sink can do event re-indexing," +
+			" please check the tx-index section in the config.toml")
+	}
+
+	if !indexer.IndexingEnabled(eventSinks) {
+		return nil, fmt.Errorf("no event sink has been enabled")
+	}
+
+	return eventSinks, nil
+}
+
+func loadStateAndBlockStore(cfg *tmcfg.Config) (*store.BlockStore, state.Store, error) {
+	dbType := tmdb.BackendType(cfg.DBBackend)
+
+	// Get BlockStore
+	blockStoreDB, err := tmdb.NewDB("blockstore", dbType, cfg.DBDir())
+	if err != nil {
+		return nil, nil, err
+	}
+	blockStore := store.NewBlockStore(blockStoreDB)
+
+	// Get StateStore
+	stateDB, err := tmdb.NewDB("state", dbType, cfg.DBDir())
+	if err != nil {
+		return nil, nil, err
+	}
+	stateStore := state.NewStore(stateDB)
+
+	return blockStore, stateStore, nil
+}
+
+func eventReIndex(cmd *cobra.Command, es []indexer.EventSink, bs state.BlockStore, ss state.Store) error {
+
+	var bar progressbar.Bar
+	bar.NewOption(startHeight-1, endHeight)
+
+	fmt.Println("start re-indexing events:")
+	defer bar.Finish()
+	for i := startHeight; i <= endHeight; i++ {
+		select {
+		case <-cmd.Context().Done():
+			return fmt.Errorf("event re-index terminated at height %d: %w", i, cmd.Context().Err())
+		default:
+			b := bs.LoadBlock(i)
+			if b == nil {
+				return fmt.Errorf("not able to load block at height %d from the blockstore", i)
+			}
+
+			r, err := ss.LoadABCIResponses(i)
+			if err != nil {
+				return fmt.Errorf("not able to load ABCI Response at height %d from the statestore", i)
+			}
+
+			e := types.EventDataNewBlockHeader{
+				Header:           b.Header,
+				NumTxs:           int64(len(b.Txs)),
+				ResultBeginBlock: *r.BeginBlock,
+				ResultEndBlock:   *r.EndBlock,
+			}
+
+			var batch *indexer.Batch
+			if e.NumTxs > 0 {
+				batch = indexer.NewBatch(e.NumTxs)
+
+				for i, tx := range b.Data.Txs {
+					tr := abcitypes.TxResult{
+						Height: b.Height,
+						Index:  uint32(i),
+						Tx:     tx,
+						Result: *(r.DeliverTxs[i]),
+					}
+
+					_ = batch.Add(&tr)
+				}
+			}
+
+			for _, sink := range es {
+				if err := sink.IndexBlockEvents(e); err != nil {
+					return fmt.Errorf("block event re-index at height %d failed: %w", i, err)
+				}
+
+				if batch != nil {
+					if err := sink.IndexTxEvents(batch.Ops); err != nil {
+						return fmt.Errorf("tx event re-index at height %d failed: %w", i, err)
+					}
+				}
+			}
+		}
+
+		bar.Play(i)
+	}
+
+	return nil
+}
+
+func checkValidHeight(bs state.BlockStore) error {
+	base := bs.Base()
+
+	if startHeight == 0 {
+		startHeight = base
+		fmt.Printf("set the start block height to the base height of the blockstore %d \n", base)
+	}
+
+	if startHeight < base {
+		return fmt.Errorf("%s (requested start height: %d, base height: %d)", ctypes.ErrHeightNotAvailable, startHeight, base)
+	}
+
+	height := bs.Height()
+
+	if startHeight > height {
+		return fmt.Errorf(
+			"%s (requested start height: %d, store height: %d)", ctypes.ErrHeightNotAvailable, startHeight, height)
+	}
+
+	if endHeight == 0 || endHeight > height {
+		endHeight = height
+		fmt.Printf("set the end block height to the latest height of the blockstore %d \n", height)
+	}
+
+	if endHeight < base {
+		return fmt.Errorf(
+			"%s (requested end height: %d, base height: %d)", ctypes.ErrHeightNotAvailable, endHeight, base)
+	}
+
+	if endHeight < startHeight {
+		return fmt.Errorf(
+			"%s (requested the end height: %d is less than the start height: %d)",
+			ctypes.ErrInvalidRequest, startHeight, endHeight)
+	}
+
+	return nil
+}
--- a/cmd/tendermint/commands/reindex_event_test.go
+++ b/cmd/tendermint/commands/reindex_event_test.go
@@ -0,0 +1,171 @@
+package commands
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/require"
+
+	abcitypes "github.com/tendermint/tendermint/abci/types"
+	tmcfg "github.com/tendermint/tendermint/config"
+	prototmstate "github.com/tendermint/tendermint/proto/tendermint/state"
+	"github.com/tendermint/tendermint/state/indexer"
+	"github.com/tendermint/tendermint/state/mocks"
+	"github.com/tendermint/tendermint/types"
+)
+
+const (
+	height int64 = 10
+	base   int64 = 2
+)
+
+func setupReIndexEventCmd() *cobra.Command {
+	reIndexEventCmd := &cobra.Command{
+		Use: ReIndexEventCmd.Use,
+		Run: func(cmd *cobra.Command, args []string) {},
+	}
+
+	_ = reIndexEventCmd.ExecuteContext(context.Background())
+
+	return reIndexEventCmd
+}
+
+func TestReIndexEventCheckHeight(t *testing.T) {
+	mockBlockStore := &mocks.BlockStore{}
+	mockBlockStore.
+		On("Base").Return(base).
+		On("Height").Return(height)
+
+	testCases := []struct {
+		startHeight int64
+		endHeight   int64
+		validHeight bool
+	}{
+		{0, 0, true},
+		{0, base, true},
+		{0, base - 1, false},
+		{0, height, true},
+		{0, height + 1, true},
+		{0, 0, true},
+		{base - 1, 0, false},
+		{base, 0, true},
+		{base, base, true},
+		{base, base - 1, false},
+		{base, height, true},
+		{base, height + 1, true},
+		{height, 0, true},
+		{height, base, false},
+		{height, height - 1, false},
+		{height, height, true},
+		{height, height + 1, true},
+		{height + 1, 0, false},
+	}
+
+	for _, tc := range testCases {
+		startHeight = tc.startHeight
+		endHeight = tc.endHeight
+
+		err := checkValidHeight(mockBlockStore)
+		if tc.validHeight {
+			require.NoError(t, err)
+		} else {
+			require.Error(t, err)
+		}
+	}
+}
+
+func TestLoadEventSink(t *testing.T) {
+	testCases := []struct {
+		sinks   []string
+		connURL string
+		loadErr bool
+	}{
+		{[]string{}, "", true},
+		{[]string{"NULL"}, "", true},
+		{[]string{"KV"}, "", false},
+		{[]string{"KV", "KV"}, "", true},
+		{[]string{"PSQL"}, "", true},         // true because empty connect url
+		{[]string{"PSQL"}, "wrongUrl", true}, // true because wrong connect url
+		// skip to test PSQL connect with correct url
+		{[]string{"UnsupportedSinkType"}, "wrongUrl", true},
+	}
+
+	for _, tc := range testCases {
+		cfg := tmcfg.TestConfig()
+		cfg.TxIndex.Indexer = tc.sinks
+		cfg.TxIndex.PsqlConn = tc.connURL
+		_, err := loadEventSinks(cfg)
+		if tc.loadErr {
+			require.Error(t, err)
+		} else {
+			require.NoError(t, err)
+		}
+	}
+}
+
+func TestLoadBlockStore(t *testing.T) {
+	bs, ss, err := loadStateAndBlockStore(tmcfg.TestConfig())
+	require.NoError(t, err)
+	require.NotNil(t, bs)
+	require.NotNil(t, ss)
+
+}
+func TestReIndexEvent(t *testing.T) {
+	mockBlockStore := &mocks.BlockStore{}
+	mockStateStore := &mocks.Store{}
+	mockEventSink := &mocks.EventSink{}
+
+	mockBlockStore.
+		On("Base").Return(base).
+		On("Height").Return(height).
+		On("LoadBlock", base).Return(nil).Once().
+		On("LoadBlock", base).Return(&types.Block{Data: types.Data{Txs: types.Txs{make(types.Tx, 1)}}}).
+		On("LoadBlock", height).Return(&types.Block{Data: types.Data{Txs: types.Txs{make(types.Tx, 1)}}})
+
+	mockEventSink.
+		On("Type").Return(indexer.KV).
+		On("IndexBlockEvents", mock.AnythingOfType("types.EventDataNewBlockHeader")).Return(errors.New("")).Once().
+		On("IndexBlockEvents", mock.AnythingOfType("types.EventDataNewBlockHeader")).Return(nil).
+		On("IndexTxEvents", mock.AnythingOfType("[]*types.TxResult")).Return(errors.New("")).Once().
+		On("IndexTxEvents", mock.AnythingOfType("[]*types.TxResult")).Return(nil)
+
+	dtx := abcitypes.ResponseDeliverTx{}
+	abciResp := &prototmstate.ABCIResponses{
+		DeliverTxs: []*abcitypes.ResponseDeliverTx{&dtx},
+		EndBlock:   &abcitypes.ResponseEndBlock{},
+		BeginBlock: &abcitypes.ResponseBeginBlock{},
+	}
+
+	mockStateStore.
+		On("LoadABCIResponses", base).Return(nil, errors.New("")).Once().
+		On("LoadABCIResponses", base).Return(abciResp, nil).
+		On("LoadABCIResponses", height).Return(abciResp, nil)
+
+	testCases := []struct {
+		startHeight int64
+		endHeight   int64
+		reIndexErr  bool
+	}{
+		{base, height, true}, // LoadBlock error
+		{base, height, true}, // LoadABCIResponses error
+		{base, height, true}, // index block event error
+		{base, height, true}, // index tx event error
+		{base, base, false},
+		{height, height, false},
+	}
+
+	for _, tc := range testCases {
+		startHeight = tc.startHeight
+		endHeight = tc.endHeight
+
+		err := eventReIndex(setupReIndexEventCmd(), []indexer.EventSink{mockEventSink}, mockBlockStore, mockStateStore)
+		if tc.reIndexErr {
+			require.Error(t, err)
+		} else {
+			require.NoError(t, err)
+		}
+	}
+}
--- a/cmd/tendermint/main.go
+++ b/cmd/tendermint/main.go
@@ -15,6 +15,7 @@ func main() {
 	rootCmd := cmd.RootCmd
 	rootCmd.AddCommand(
 		cmd.GenValidatorCmd,
+		cmd.ReIndexEventCmd,
 		cmd.InitFilesCmd,
 		cmd.ProbeUpnpCmd,
 		cmd.LightCmd,
--- a/config/config.go
+++ b/config/config.go
@@ -29,8 +29,8 @@ const (
 	ModeValidator = "validator"
 	ModeSeed      = "seed"

-	BlockchainV0 = "v0"
-	BlockchainV2 = "v2"
+	BlockSyncV0 = "v0"
+	BlockSyncV2 = "v2"

 	MempoolV0 = "v0"
 	MempoolV1 = "v1"
@@ -76,7 +76,7 @@ type Config struct {
 	P2P             *P2PConfig             `mapstructure:"p2p"`
 	Mempool         *MempoolConfig         `mapstructure:"mempool"`
 	StateSync       *StateSyncConfig       `mapstructure:"statesync"`
-	FastSync        *FastSyncConfig        `mapstructure:"fastsync"`
+	BlockSync       *BlockSyncConfig       `mapstructure:"fastsync"`
 	Consensus       *ConsensusConfig       `mapstructure:"consensus"`
 	TxIndex         *TxIndexConfig         `mapstructure:"tx-index"`
 	Instrumentation *InstrumentationConfig `mapstructure:"instrumentation"`
@@ -91,7 +91,7 @@ func DefaultConfig() *Config {
 		P2P:             DefaultP2PConfig(),
 		Mempool:         DefaultMempoolConfig(),
 		StateSync:       DefaultStateSyncConfig(),
-		FastSync:        DefaultFastSyncConfig(),
+		BlockSync:       DefaultBlockSyncConfig(),
 		Consensus:       DefaultConsensusConfig(),
 		TxIndex:         DefaultTxIndexConfig(),
 		Instrumentation: DefaultInstrumentationConfig(),
@@ -114,7 +114,7 @@ func TestConfig() *Config {
 		P2P:             TestP2PConfig(),
 		Mempool:         TestMempoolConfig(),
 		StateSync:       TestStateSyncConfig(),
-		FastSync:        TestFastSyncConfig(),
+		BlockSync:       TestBlockSyncConfig(),
 		Consensus:       TestConsensusConfig(),
 		TxIndex:         TestTxIndexConfig(),
 		Instrumentation: TestInstrumentationConfig(),
@@ -151,7 +151,7 @@ func (cfg *Config) ValidateBasic() error {
 	if err := cfg.StateSync.ValidateBasic(); err != nil {
 		return fmt.Errorf("error in [statesync] section: %w", err)
 	}
-	if err := cfg.FastSync.ValidateBasic(); err != nil {
+	if err := cfg.BlockSync.ValidateBasic(); err != nil {
 		return fmt.Errorf("error in [fastsync] section: %w", err)
 	}
 	if err := cfg.Consensus.ValidateBasic(); err != nil {
@@ -197,6 +197,7 @@ type BaseConfig struct { //nolint: maligned
 	// If this node is many blocks behind the tip of the chain, FastSync
 	// allows them to catchup quickly by downloading blocks in parallel
 	// and verifying their commits
+	// TODO: This should be moved to the blocksync config
 	FastSyncMode bool `mapstructure:"fast-sync"`

 	// Database backend: goleveldb | cleveldb | boltdb | rocksdb
@@ -911,7 +912,7 @@ func DefaultStateSyncConfig() *StateSyncConfig {
 	}
 }

-// TestFastSyncConfig returns a default configuration for the state sync service
+// TestStateSyncConfig returns a default configuration for the state sync service
 func TestStateSyncConfig() *StateSyncConfig {
 	return DefaultStateSyncConfig()
 }
@@ -967,34 +968,33 @@ func (cfg *StateSyncConfig) ValidateBasic() error {
 }

 //-----------------------------------------------------------------------------
-// FastSyncConfig

-// FastSyncConfig defines the configuration for the Tendermint fast sync service
-type FastSyncConfig struct {
+// BlockSyncConfig (formerly known as FastSync) defines the configuration for the Tendermint block sync service
+type BlockSyncConfig struct {
 	Version string `mapstructure:"version"`
 }

-// DefaultFastSyncConfig returns a default configuration for the fast sync service
-func DefaultFastSyncConfig() *FastSyncConfig {
-	return &FastSyncConfig{
-		Version: BlockchainV0,
+// DefaultBlockSyncConfig returns a default configuration for the block sync service
+func DefaultBlockSyncConfig() *BlockSyncConfig {
+	return &BlockSyncConfig{
+		Version: BlockSyncV0,
 	}
 }

-// TestFastSyncConfig returns a default configuration for the fast sync.
-func TestFastSyncConfig() *FastSyncConfig {
-	return DefaultFastSyncConfig()
+// TestBlockSyncConfig returns a default configuration for the block sync.
+func TestBlockSyncConfig() *BlockSyncConfig {
+	return DefaultBlockSyncConfig()
 }

 // ValidateBasic performs basic validation.
-func (cfg *FastSyncConfig) ValidateBasic() error {
+func (cfg *BlockSyncConfig) ValidateBasic() error {
 	switch cfg.Version {
-	case BlockchainV0:
+	case BlockSyncV0:
 		return nil
-	case BlockchainV2:
-		return errors.New("fastsync version v2 is no longer supported. Please use v0")
+	case BlockSyncV2:
+		return errors.New("blocksync version v2 is no longer supported. Please use v0")
 	default:
-		return fmt.Errorf("unknown fastsync version %s", cfg.Version)
+		return fmt.Errorf("unknown blocksync version %s", cfg.Version)
 	}
 }

--- a/config/config_test.go
+++ b/config/config_test.go
@@ -125,8 +125,8 @@ func TestStateSyncConfigValidateBasic(t *testing.T) {
 	require.NoError(t, cfg.ValidateBasic())
 }

-func TestFastSyncConfigValidateBasic(t *testing.T) {
-	cfg := TestFastSyncConfig()
+func TestBlockSyncConfigValidateBasic(t *testing.T) {
+	cfg := TestBlockSyncConfig()
 	assert.NoError(t, cfg.ValidateBasic())

 	// tamper with version
--- a/config/toml.go
+++ b/config/toml.go
@@ -452,14 +452,14 @@ chunk-request-timeout = "{{ .StateSync.ChunkRequestTimeout }}"
 fetchers = "{{ .StateSync.Fetchers }}"

 #######################################################
-###       Fast Sync Configuration Connections       ###
+###       Block Sync Configuration Connections       ###
 #######################################################
 [fastsync]

-# Fast Sync version to use:
-#   1) "v0" (default) - the legacy fast sync implementation
+# Block Sync version to use:
+#   1) "v0" (default) - the legacy block sync implementation
 #   2) "v2" - DEPRECATED, please use v0
-version = "{{ .FastSync.Version }}"
+version = "{{ .BlockSync.Version }}"

 #######################################################
 ###         Consensus Configuration Options         ###
--- a/docs/nodes/configuration.md
+++ b/docs/nodes/configuration.md
@@ -36,7 +36,7 @@ proxy-app = "tcp://127.0.0.1:26658"
 # A custom human readable name for this node
 moniker = "anonymous"

-# If this node is many blocks behind the tip of the chain, FastSync
+# If this node is many blocks behind the tip of the chain, BlockSync
 # allows them to catchup quickly by downloading blocks in parallel
 # and verifying their commits
 fast-sync = true
@@ -354,12 +354,12 @@ discovery-time = "15s"
 temp-dir = ""

 #######################################################
-###       Fast Sync Configuration Connections       ###
+###       BlockSync Configuration Connections       ###
 #######################################################
 [fastsync]

-# Fast Sync version to use:
-#   1) "v0" (default) - the legacy fast sync implementation
+# Block Sync version to use:
+#   1) "v0" (default) - the legacy block sync implementation
 #   2) "v2" - complete redesign of v0, optimized for testability & readability
 version = "v0"

--- a/docs/tendermint-core/README.md
+++ b/docs/tendermint-core/README.md
@@ -14,7 +14,7 @@ This section dives into the internals of Go-Tendermint.
 - [Subscribing to events](./subscription.md)
 - [Block Structure](./block-structure.md)
 - [RPC](./rpc.md)
- [Fast Sync](./fast-sync.md)
+- [Block Sync](./block-sync.md)
 - [State Sync](./state-sync.md)
 - [Mempool](./mempool.md)
 - [Light Client](./light-client.md)
--- a/docs/tendermint-core/block-sync.md
+++ b/docs/tendermint-core/block-sync.md
@@ -2,7 +2,8 @@
 order: 10
 ---

-# Fast Sync
+# Block Sync
+*Formerly known as Fast Sync*

 In a proof of work blockchain, syncing with the chain is the same
 process as staying up-to-date with the consensus: download blocks, and
@@ -14,7 +15,7 @@ scratch can take a very long time. It's much faster to just download
 blocks and check the merkle tree of validators than to run the real-time
 consensus gossip protocol.

-## Using Fast Sync
+## Using Block Sync

 To support faster syncing, Tendermint offers a `fast-sync` mode, which
 is enabled by default, and can be toggled in the `config.toml` or via
@@ -22,36 +23,36 @@ is enabled by default, and can be toggled in the `config.toml` or via

 In this mode, the Tendermint daemon will sync hundreds of times faster
 than if it used the real-time consensus process. Once caught up, the
-daemon will switch out of fast sync and into the normal consensus mode.
+daemon will switch out of Block Sync and into the normal consensus mode.
 After running for some time, the node is considered `caught up` if it
 has at least one peer and it's height is at least as high as the max
 reported peer height. See [the IsCaughtUp
 method](https://github.com/tendermint/tendermint/blob/b467515719e686e4678e6da4e102f32a491b85a0/blockchain/pool.go#L128).

-Note: There are three versions of fast sync. We recommend using v0 as v2 is still in beta.
+Note: There are two versions of Block Sync. We recommend using v0 as v2 is still in beta.
  If you would like to use a different version you can do so by changing the version in the `config.toml`:

 ```toml
 #######################################################
-###       Fast Sync Configuration Connections       ###
+###       Block Sync Configuration Connections       ###
 #######################################################
 [fastsync]

-# Fast Sync version to use:
-#   1) "v0" (default) - the legacy fast sync implementation
+# Block Sync version to use:
+#   1) "v0" (default) - the legacy Block Sync implementation
 #   2) "v2" - complete redesign of v0, optimized for testability & readability
 version = "v0"
 ```

-If we're lagging sufficiently, we should go back to fast syncing, but
+If we're lagging sufficiently, we should go back to block syncing, but
 this is an [open issue](https://github.com/tendermint/tendermint/issues/129).

-## The Fast Sync event
-When the tendermint blockchain core launches, it might switch to the `fast-sync`
+## The Block Sync event
+When the tendermint blockchain core launches, it might switch to the `block-sync`
 mode to catch up the states to the current network best height. the core will emits
 a fast-sync event to expose the current status and the sync height. Once it catched
 the network best height, it will switches to the state sync mechanism and then emit
 another event for exposing the fast-sync `complete` status and the state `height`.

-The user can query the events by subscribing `EventQueryFastSyncStatus`
+The user can query the events by subscribing `EventQueryBlockSyncStatus`
 Please check [types](https://pkg.go.dev/github.com/tendermint/tendermint/types?utm_source=godoc#pkg-constants) for the details.
--- a/docs/tendermint-core/state-sync.md
+++ b/docs/tendermint-core/state-sync.md
@@ -4,7 +4,7 @@ order: 11

 # State Sync

-With fast sync a node is downloading all of the data of an application from genesis and verifying it. 
+With block sync a node is downloading all of the data of an application from genesis and verifying it. 
 With state sync your node will download data related to the head or near the head of the chain and verify the data. 
 This leads to drastically shorter times for joining a network. 

--- a/internal/blockchain/doc.go
+++ b/internal/blockchain/doc.go
@@ -1,19 +1,19 @@
 /*
-Package blockchain implements two versions of a reactor Service that are
-responsible for block propagation and gossip between peers. This mechanism is
-more formally known as fast-sync.
+Package blocksync implements two versions of a reactor Service that are
+responsible for block propagation and gossip between peers. This mechanism was
+formerly known as fast-sync.

 In order for a full node to successfully participate in consensus, it must have
-the latest view of state. The fast-sync protocol is a mechanism in which peers
+the latest view of state. The blocksync protocol is a mechanism in which peers
 may exchange and gossip entire blocks with one another, in a request/response
 type model, until they've successfully synced to the latest head block. Once
 succussfully synced, the full node can switch to an active role in consensus and
-will no longer fast-sync and thus no longer run the fast-sync process.
+will no longer blocksync and thus no longer run the blocksync process.

-Note, the blockchain reactor Service gossips entire block and relevant data such
-that each receiving peer may construct the entire view of the blockchain state.
+Note, the blocksync reactor Service gossips entire block and relevant data such
+that each receiving peer may construct the entire view of the blocksync state.

-There are two versions of the blockchain reactor Service, i.e. fast-sync:
+There are currently two versions of the blocksync reactor Service:

 - v0: The initial implementation that is battle-tested, but whose test coverage
 	is lacking and is not formally verifiable.
@@ -22,7 +22,7 @@ There are two versions of the blockchain reactor Service, i.e. fast-sync:
 	is known to have various bugs that could make it unreliable in production
 	environments.

-The v0 blockchain reactor Service has one p2p channel, BlockchainChannel. This
+The v0 blocksync reactor Service has one p2p channel, BlockchainChannel. This
 channel is responsible for handling messages that both request blocks and respond
 to block requests from peers. For every block request from a peer, the reactor
 will execute respondToPeer which will fetch the block from the node's state store
@@ -33,4 +33,4 @@ Internally, v0 runs a poolRoutine that constantly checks for what blocks it need
 and requests them. The poolRoutine is also responsible for taking blocks from the
 pool, saving and executing each block.
 */
-package blockchain
+package blocksync
--- a/internal/blockchain/msgs.go
+++ b/internal/blockchain/msgs.go
@@ -1,7 +1,7 @@
-package blockchain
+package blocksync

 import (
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/types"
 )

--- a/internal/blockchain/v0/pool.go
+++ b/internal/blockchain/v0/pool.go
@@ -65,7 +65,7 @@ type BlockRequest struct {
 	PeerID types.NodeID
 }

-// BlockPool keeps track of the fast sync peers, block requests and block responses.
+// BlockPool keeps track of the block sync peers, block requests and block responses.
 type BlockPool struct {
 	service.BaseService
 	lastAdvance time.Time
--- a/internal/blockchain/v0/pool_test.go
+++ b/internal/blockchain/v0/pool_test.go
--- a/internal/blockchain/v0/reactor.go
+++ b/internal/blockchain/v0/reactor.go
@@ -6,13 +6,13 @@ import (
 	"sync"
 	"time"

-	bc "github.com/tendermint/tendermint/internal/blockchain"
+	bc "github.com/tendermint/tendermint/internal/blocksync"
 	cons "github.com/tendermint/tendermint/internal/consensus"
 	"github.com/tendermint/tendermint/internal/p2p"
 	"github.com/tendermint/tendermint/libs/log"
 	"github.com/tendermint/tendermint/libs/service"
 	tmSync "github.com/tendermint/tendermint/libs/sync"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	sm "github.com/tendermint/tendermint/state"
 	"github.com/tendermint/tendermint/store"
 	"github.com/tendermint/tendermint/types"
@@ -60,7 +60,7 @@ const (
 )

 type consensusReactor interface {
-	// For when we switch from blockchain reactor and fast sync to the consensus
+	// For when we switch from blockchain reactor and block sync to the consensus
 	// machine.
 	SwitchToConsensus(state sm.State, skipWAL bool)
 }
@@ -85,7 +85,7 @@ type Reactor struct {
 	store       *store.BlockStore
 	pool        *BlockPool
 	consReactor consensusReactor
-	fastSync    *tmSync.AtomicBool
+	blockSync   *tmSync.AtomicBool

 	blockchainCh *p2p.Channel
 	// blockchainOutBridgeCh defines a channel that acts as a bridge between sending Envelope
@@ -121,7 +121,7 @@ func NewReactor(
 	consReactor consensusReactor,
 	blockchainCh *p2p.Channel,
 	peerUpdates *p2p.PeerUpdates,
-	fastSync bool,
+	blockSync bool,
 	metrics *cons.Metrics,
 ) (*Reactor, error) {
 	if state.LastBlockHeight != store.Height() {
@@ -142,7 +142,7 @@ func NewReactor(
 		store:                 store,
 		pool:                  NewBlockPool(startHeight, requestsCh, errorsCh),
 		consReactor:           consReactor,
-		fastSync:              tmSync.NewBool(fastSync),
+		blockSync:             tmSync.NewBool(blockSync),
 		requestsCh:            requestsCh,
 		errorsCh:              errorsCh,
 		blockchainCh:          blockchainCh,
@@ -162,10 +162,10 @@ func NewReactor(
 // messages on that p2p channel accordingly. The caller must be sure to execute
 // OnStop to ensure the outbound p2p Channels are closed.
 //
-// If fastSync is enabled, we also start the pool and the pool processing
+// If blockSync is enabled, we also start the pool and the pool processing
 // goroutine. If the pool fails to start, an error is returned.
 func (r *Reactor) OnStart() error {
-	if r.fastSync.IsSet() {
+	if r.blockSync.IsSet() {
 		if err := r.pool.Start(); err != nil {
 			return err
 		}
@@ -183,7 +183,7 @@ func (r *Reactor) OnStart() error {
 // OnStop stops the reactor by signaling to all spawned goroutines to exit and
 // blocking until they all exit.
 func (r *Reactor) OnStop() {
-	if r.fastSync.IsSet() {
+	if r.blockSync.IsSet() {
 		if err := r.pool.Stop(); err != nil {
 			r.Logger.Error("failed to stop pool", "err", err)
 		}
@@ -371,10 +371,10 @@ func (r *Reactor) processPeerUpdates() {
 	}
 }

-// SwitchToFastSync is called by the state sync reactor when switching to fast
+// SwitchToBlockSync is called by the state sync reactor when switching to fast
 // sync.
-func (r *Reactor) SwitchToFastSync(state sm.State) error {
-	r.fastSync.Set()
+func (r *Reactor) SwitchToBlockSync(state sm.State) error {
+	r.blockSync.Set()
 	r.initialState = state
 	r.pool.height = state.LastBlockHeight + 1

@@ -496,7 +496,7 @@ FOR_LOOP:
 				r.Logger.Error("failed to stop pool", "err", err)
 			}

-			r.fastSync.UnSet()
+			r.blockSync.UnSet()

 			if r.consReactor != nil {
 				r.consReactor.SwitchToConsensus(state, blocksSynced > 0 || stateSynced)
@@ -591,7 +591,7 @@ FOR_LOOP:
 				if blocksSynced%100 == 0 {
 					lastRate = 0.9*lastRate + 0.1*(100/time.Since(lastHundred).Seconds())
 					r.Logger.Info(
-						"fast sync rate",
+						"block sync rate",
 						"height", r.pool.height,
 						"max_peer_height", r.pool.MaxPeerHeight(),
 						"blocks/s", lastRate,
@@ -614,14 +614,14 @@ func (r *Reactor) GetMaxPeerBlockHeight() int64 {
 }

 func (r *Reactor) GetTotalSyncedTime() time.Duration {
-	if !r.fastSync.IsSet() || r.syncStartTime.IsZero() {
+	if !r.blockSync.IsSet() || r.syncStartTime.IsZero() {
 		return time.Duration(0)
 	}
 	return time.Since(r.syncStartTime)
 }

 func (r *Reactor) GetRemainingSyncTime() time.Duration {
-	if !r.fastSync.IsSet() {
+	if !r.blockSync.IsSet() {
 		return time.Duration(0)
 	}

--- a/internal/blockchain/v0/reactor_test.go
+++ b/internal/blockchain/v0/reactor_test.go
@@ -15,7 +15,7 @@ import (
 	"github.com/tendermint/tendermint/internal/p2p/p2ptest"
 	"github.com/tendermint/tendermint/internal/test/factory"
 	"github.com/tendermint/tendermint/libs/log"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/proxy"
 	sm "github.com/tendermint/tendermint/state"
 	sf "github.com/tendermint/tendermint/state/test/factory"
@@ -36,7 +36,7 @@ type reactorTestSuite struct {
 	peerChans          map[types.NodeID]chan p2p.PeerUpdate
 	peerUpdates        map[types.NodeID]*p2p.PeerUpdates

-	fastSync bool
+	blockSync bool
 }

 func setup(
@@ -61,7 +61,7 @@ func setup(
 		blockchainChannels: make(map[types.NodeID]*p2p.Channel, numNodes),
 		peerChans:          make(map[types.NodeID]chan p2p.PeerUpdate, numNodes),
 		peerUpdates:        make(map[types.NodeID]*p2p.PeerUpdates, numNodes),
-		fastSync:           true,
+		blockSync:          true,
 	}

 	chDesc := p2p.ChannelDescriptor{ID: byte(BlockchainChannel)}
@@ -163,7 +163,7 @@ func (rts *reactorTestSuite) addNode(t *testing.T,
 		nil,
 		rts.blockchainChannels[nodeID],
 		rts.peerUpdates[nodeID],
-		rts.fastSync,
+		rts.blockSync,
 		cons.NopMetrics())
 	require.NoError(t, err)

--- a/internal/blockchain/v2/internal/behavior/doc.go
+++ b/internal/blockchain/v2/internal/behavior/doc.go
--- a/internal/blockchain/v2/internal/behavior/peer_behaviour.go
+++ b/internal/blockchain/v2/internal/behavior/peer_behaviour.go
--- a/internal/blockchain/v2/internal/behavior/reporter.go
+++ b/internal/blockchain/v2/internal/behavior/reporter.go
--- a/internal/blockchain/v2/internal/behavior/reporter_test.go
+++ b/internal/blockchain/v2/internal/behavior/reporter_test.go
@@ -4,7 +4,7 @@ import (
 	"sync"
 	"testing"

-	bh "github.com/tendermint/tendermint/internal/blockchain/v2/internal/behavior"
+	bh "github.com/tendermint/tendermint/internal/blocksync/v2/internal/behavior"
 	"github.com/tendermint/tendermint/types"
 )

--- a/internal/blockchain/v2/io.go
+++ b/internal/blockchain/v2/io.go
@@ -5,7 +5,7 @@ import (

 	"github.com/gogo/protobuf/proto"
 	"github.com/tendermint/tendermint/internal/p2p"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/state"
 	"github.com/tendermint/tendermint/types"
 )
@@ -42,7 +42,7 @@ const (
 )

 type consensusReactor interface {
-	// for when we switch from blockchain reactor and fast sync to
+	// for when we switch from blockchain reactor and block sync to
 	// the consensus machine
 	SwitchToConsensus(state state.State, skipWAL bool)
 }
--- a/internal/blockchain/v2/metrics.go
+++ b/internal/blockchain/v2/metrics.go
--- a/internal/blockchain/v2/processor.go
+++ b/internal/blockchain/v2/processor.go
--- a/internal/blockchain/v2/processor_context.go
+++ b/internal/blockchain/v2/processor_context.go
--- a/internal/blockchain/v2/processor_test.go
+++ b/internal/blockchain/v2/processor_test.go
--- a/internal/blockchain/v2/reactor.go
+++ b/internal/blockchain/v2/reactor.go
@@ -7,14 +7,14 @@ import (

 	proto "github.com/gogo/protobuf/proto"

-	bc "github.com/tendermint/tendermint/internal/blockchain"
-	"github.com/tendermint/tendermint/internal/blockchain/v2/internal/behavior"
+	bc "github.com/tendermint/tendermint/internal/blocksync"
+	"github.com/tendermint/tendermint/internal/blocksync/v2/internal/behavior"
 	cons "github.com/tendermint/tendermint/internal/consensus"
 	tmsync "github.com/tendermint/tendermint/internal/libs/sync"
 	"github.com/tendermint/tendermint/internal/p2p"
 	"github.com/tendermint/tendermint/libs/log"
 	"github.com/tendermint/tendermint/libs/sync"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/state"
 	"github.com/tendermint/tendermint/types"
 )
@@ -31,12 +31,12 @@ type blockStore interface {
 	Height() int64
 }

-// BlockchainReactor handles fast sync protocol.
+// BlockchainReactor handles block sync protocol.
 type BlockchainReactor struct {
 	p2p.BaseReactor

-	fastSync    *sync.AtomicBool // enable fast sync on start when it's been Set
-	stateSynced bool             // set to true when SwitchToFastSync is called by state sync
+	blockSync   *sync.AtomicBool // enable block sync on start when it's been Set
+	stateSynced bool             // set to true when SwitchToBlockSync is called by state sync
 	scheduler   *Routine
 	processor   *Routine
 	logger      log.Logger
@@ -44,7 +44,7 @@ type BlockchainReactor struct {
 	mtx           tmsync.RWMutex
 	maxPeerHeight int64
 	syncHeight    int64
-	events        chan Event // non-nil during a fast sync
+	events        chan Event // non-nil during a block sync

 	reporter behavior.Reporter
 	io       iIO
@@ -61,7 +61,7 @@ type blockApplier interface {

 // XXX: unify naming in this package around tmState
 func newReactor(state state.State, store blockStore, reporter behavior.Reporter,
-	blockApplier blockApplier, fastSync bool, metrics *cons.Metrics) *BlockchainReactor {
+	blockApplier blockApplier, blockSync bool, metrics *cons.Metrics) *BlockchainReactor {
 	initHeight := state.LastBlockHeight + 1
 	if initHeight == 1 {
 		initHeight = state.InitialHeight
@@ -78,7 +78,7 @@ func newReactor(state state.State, store blockStore, reporter behavior.Reporter,
 		store:           store,
 		reporter:        reporter,
 		logger:          log.NewNopLogger(),
-		fastSync:        sync.NewBool(fastSync),
+		blockSync:       sync.NewBool(blockSync),
 		syncStartHeight: initHeight,
 		syncStartTime:   time.Time{},
 		lastSyncRate:    0,
@@ -90,10 +90,10 @@ func NewBlockchainReactor(
 	state state.State,
 	blockApplier blockApplier,
 	store blockStore,
-	fastSync bool,
+	blockSync bool,
 	metrics *cons.Metrics) *BlockchainReactor {
 	reporter := behavior.NewMockReporter()
-	return newReactor(state, store, reporter, blockApplier, fastSync, metrics)
+	return newReactor(state, store, reporter, blockApplier, blockSync, metrics)
 }

 // SetSwitch implements Reactor interface.
@@ -137,22 +137,22 @@ func (r *BlockchainReactor) SetLogger(logger log.Logger) {
 // Start implements cmn.Service interface
 func (r *BlockchainReactor) Start() error {
 	r.reporter = behavior.NewSwitchReporter(r.BaseReactor.Switch)
-	if r.fastSync.IsSet() {
+	if r.blockSync.IsSet() {
 		err := r.startSync(nil)
 		if err != nil {
-			return fmt.Errorf("failed to start fast sync: %w", err)
+			return fmt.Errorf("failed to start block sync: %w", err)
 		}
 	}
 	return nil
 }

-// startSync begins a fast sync, signaled by r.events being non-nil. If state is non-nil,
+// startSync begins a block sync, signaled by r.events being non-nil. If state is non-nil,
 // the scheduler and processor is updated with this state on startup.
 func (r *BlockchainReactor) startSync(state *state.State) error {
 	r.mtx.Lock()
 	defer r.mtx.Unlock()
 	if r.events != nil {
-		return errors.New("fast sync already in progress")
+		return errors.New("block sync already in progress")
 	}
 	r.events = make(chan Event, chBufferSize)
 	go r.scheduler.start()
@@ -167,7 +167,7 @@ func (r *BlockchainReactor) startSync(state *state.State) error {
 	return nil
 }

-// endSync ends a fast sync
+// endSync ends a block sync
 func (r *BlockchainReactor) endSync() {
 	r.mtx.Lock()
 	defer r.mtx.Unlock()
@@ -179,8 +179,8 @@ func (r *BlockchainReactor) endSync() {
 	r.processor.stop()
 }

-// SwitchToFastSync is called by the state sync reactor when switching to fast sync.
-func (r *BlockchainReactor) SwitchToFastSync(state state.State) error {
+// SwitchToBlockSync is called by the state sync reactor when switching to block sync.
+func (r *BlockchainReactor) SwitchToBlockSync(state state.State) error {
 	r.stateSynced = true
 	state = state.Copy()

@@ -434,7 +434,7 @@ func (r *BlockchainReactor) demux(events <-chan Event) {
 					} else {
 						r.lastSyncRate = 0.9*r.lastSyncRate + 0.1*newSyncRate
 					}
-					r.logger.Info("Fast Sync Rate", "height", r.syncHeight,
+					r.logger.Info("block sync Rate", "height", r.syncHeight,
 						"max_peer_height", r.maxPeerHeight, "blocks/s", r.lastSyncRate)
 					lastHundred = time.Now()
 				}
@@ -442,12 +442,12 @@ func (r *BlockchainReactor) demux(events <-chan Event) {
 			case pcBlockVerificationFailure:
 				r.scheduler.send(event)
 			case pcFinished:
-				r.logger.Info("Fast sync complete, switching to consensus")
+				r.logger.Info("block sync complete, switching to consensus")
 				if !r.io.trySwitchToConsensus(event.tmState, event.blocksSynced > 0 || r.stateSynced) {
 					r.logger.Error("Failed to switch to consensus reactor")
 				}
 				r.endSync()
-				r.fastSync.UnSet()
+				r.blockSync.UnSet()
 				return
 			case noOpEvent:
 			default:
@@ -617,14 +617,14 @@ func (r *BlockchainReactor) GetMaxPeerBlockHeight() int64 {
 }

 func (r *BlockchainReactor) GetTotalSyncedTime() time.Duration {
-	if !r.fastSync.IsSet() || r.syncStartTime.IsZero() {
+	if !r.blockSync.IsSet() || r.syncStartTime.IsZero() {
 		return time.Duration(0)
 	}
 	return time.Since(r.syncStartTime)
 }

 func (r *BlockchainReactor) GetRemainingSyncTime() time.Duration {
-	if !r.fastSync.IsSet() {
+	if !r.blockSync.IsSet() {
 		return time.Duration(0)
 	}

--- a/internal/blockchain/v2/reactor_test.go
+++ b/internal/blockchain/v2/reactor_test.go
@@ -15,7 +15,7 @@ import (

 	abci "github.com/tendermint/tendermint/abci/types"
 	cfg "github.com/tendermint/tendermint/config"
-	"github.com/tendermint/tendermint/internal/blockchain/v2/internal/behavior"
+	"github.com/tendermint/tendermint/internal/blocksync/v2/internal/behavior"
 	cons "github.com/tendermint/tendermint/internal/consensus"
 	"github.com/tendermint/tendermint/internal/mempool/mock"
 	"github.com/tendermint/tendermint/internal/p2p"
@@ -23,7 +23,7 @@ import (
 	"github.com/tendermint/tendermint/internal/test/factory"
 	"github.com/tendermint/tendermint/libs/log"
 	"github.com/tendermint/tendermint/libs/service"
-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/proxy"
 	sm "github.com/tendermint/tendermint/state"
 	sf "github.com/tendermint/tendermint/state/test/factory"
--- a/internal/blockchain/v2/routine.go
+++ b/internal/blockchain/v2/routine.go
--- a/internal/blockchain/v2/routine_test.go
+++ b/internal/blockchain/v2/routine_test.go
--- a/internal/blockchain/v2/scheduler.go
+++ b/internal/blockchain/v2/scheduler.go
@@ -163,7 +163,7 @@ type scheduler struct {
 	height int64

 	// lastAdvance tracks the last time a block execution happened.
-	// syncTimeout is the maximum time the scheduler waits to advance in the fast sync process before finishing.
+	// syncTimeout is the maximum time the scheduler waits to advance in the block sync process before finishing.
 	// This covers the cases where there are no peers or all peers have a lower height.
 	lastAdvance time.Time
 	syncTimeout time.Duration
--- a/internal/blockchain/v2/scheduler_test.go
+++ b/internal/blockchain/v2/scheduler_test.go
--- a/internal/blockchain/v2/types.go
+++ b/internal/blockchain/v2/types.go
--- a/internal/consensus/metrics.go
+++ b/internal/consensus/metrics.go
@@ -54,8 +54,8 @@ type Metrics struct {
 	TotalTxs metrics.Gauge
 	// The latest block height.
 	CommittedHeight metrics.Gauge
-	// Whether or not a node is fast syncing. 1 if yes, 0 if no.
-	FastSyncing metrics.Gauge
+	// Whether or not a node is block syncing. 1 if yes, 0 if no.
+	BlockSyncing metrics.Gauge
 	// Whether or not a node is state syncing. 1 if yes, 0 if no.
 	StateSyncing metrics.Gauge

@@ -169,11 +169,11 @@ func PrometheusMetrics(namespace string, labelsAndValues ...string) *Metrics {
 			Name:      "latest_block_height",
 			Help:      "The latest block height.",
 		}, labels).With(labelsAndValues...),
-		FastSyncing: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
+		BlockSyncing: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
 			Namespace: namespace,
 			Subsystem: MetricsSubsystem,
-			Name:      "fast_syncing",
-			Help:      "Whether or not a node is fast syncing. 1 if yes, 0 if no.",
+			Name:      "block_syncing",
+			Help:      "Whether or not a node is block syncing. 1 if yes, 0 if no.",
 		}, labels).With(labelsAndValues...),
 		StateSyncing: prometheus.NewGaugeFrom(stdprometheus.GaugeOpts{
 			Namespace: namespace,
@@ -214,7 +214,7 @@ func NopMetrics() *Metrics {
 		BlockSizeBytes:  discard.NewHistogram(),
 		TotalTxs:        discard.NewGauge(),
 		CommittedHeight: discard.NewGauge(),
-		FastSyncing:     discard.NewGauge(),
+		BlockSyncing:    discard.NewGauge(),
 		StateSyncing:    discard.NewGauge(),
 		BlockParts:      discard.NewCounter(),
 	}
--- a/internal/consensus/mocks/cons_sync_reactor.go
+++ b/internal/consensus/mocks/cons_sync_reactor.go
@@ -12,8 +12,8 @@ type ConsSyncReactor struct {
 	mock.Mock
 }

-// SetFastSyncingMetrics provides a mock function with given fields: _a0
-func (_m *ConsSyncReactor) SetFastSyncingMetrics(_a0 float64) {
+// SetBlockSyncingMetrics provides a mock function with given fields: _a0
+func (_m *ConsSyncReactor) SetBlockSyncingMetrics(_a0 float64) {
 	_m.Called(_a0)
 }

--- a/internal/consensus/mocks/fast_sync_reactor.go
+++ b/internal/consensus/mocks/fast_sync_reactor.go
@@ -9,13 +9,13 @@ import (
 	time "time"
 )

-// FastSyncReactor is an autogenerated mock type for the FastSyncReactor type
-type FastSyncReactor struct {
+// BlockSyncReactor is an autogenerated mock type for the BlockSyncReactor type
+type BlockSyncReactor struct {
 	mock.Mock
 }

 // GetMaxPeerBlockHeight provides a mock function with given fields:
-func (_m *FastSyncReactor) GetMaxPeerBlockHeight() int64 {
+func (_m *BlockSyncReactor) GetMaxPeerBlockHeight() int64 {
 	ret := _m.Called()

 	var r0 int64
@@ -29,7 +29,7 @@ func (_m *FastSyncReactor) GetMaxPeerBlockHeight() int64 {
 }

 // GetRemainingSyncTime provides a mock function with given fields:
-func (_m *FastSyncReactor) GetRemainingSyncTime() time.Duration {
+func (_m *BlockSyncReactor) GetRemainingSyncTime() time.Duration {
 	ret := _m.Called()

 	var r0 time.Duration
@@ -43,7 +43,7 @@ func (_m *FastSyncReactor) GetRemainingSyncTime() time.Duration {
 }

 // GetTotalSyncedTime provides a mock function with given fields:
-func (_m *FastSyncReactor) GetTotalSyncedTime() time.Duration {
+func (_m *BlockSyncReactor) GetTotalSyncedTime() time.Duration {
 	ret := _m.Called()

 	var r0 time.Duration
@@ -56,8 +56,8 @@ func (_m *FastSyncReactor) GetTotalSyncedTime() time.Duration {
 	return r0
 }

-// SwitchToFastSync provides a mock function with given fields: _a0
-func (_m *FastSyncReactor) SwitchToFastSync(_a0 state.State) error {
+// SwitchToBlockSync provides a mock function with given fields: _a0
+func (_m *BlockSyncReactor) SwitchToBlockSync(_a0 state.State) error {
 	ret := _m.Called(_a0)

 	var r0 error
--- a/internal/consensus/reactor.go
+++ b/internal/consensus/reactor.go
@@ -96,18 +96,18 @@ const (

 type ReactorOption func(*Reactor)

-// Temporary interface for switching to fast sync, we should get rid of v0.
+// NOTE: Temporary interface for switching to block sync, we should get rid of v0.
 // See: https://github.com/tendermint/tendermint/issues/4595
-type FastSyncReactor interface {
-	SwitchToFastSync(sm.State) error
+type BlockSyncReactor interface {
+	SwitchToBlockSync(sm.State) error

 	GetMaxPeerBlockHeight() int64

-	// GetTotalSyncedTime returns the time duration since the fastsync starting.
+	// GetTotalSyncedTime returns the time duration since the blocksync starting.
 	GetTotalSyncedTime() time.Duration

 	// GetRemainingSyncTime returns the estimating time the node will be fully synced,
-	// if will return 0 if the fastsync does not perform or the number of block synced is
+	// if will return 0 if the blocksync does not perform or the number of block synced is
 	// too small (less than 100).
 	GetRemainingSyncTime() time.Duration
 }
@@ -117,7 +117,7 @@ type FastSyncReactor interface {
 type ConsSyncReactor interface {
 	SwitchToConsensus(sm.State, bool)
 	SetStateSyncingMetrics(float64)
-	SetFastSyncingMetrics(float64)
+	SetBlockSyncingMetrics(float64)
 }

 // Reactor defines a reactor for the consensus service.
@@ -265,7 +265,7 @@ func (r *Reactor) SetEventBus(b *types.EventBus) {
 	r.state.SetEventBus(b)
 }

-// WaitSync returns whether the consensus reactor is waiting for state/fast sync.
+// WaitSync returns whether the consensus reactor is waiting for state/block sync.
 func (r *Reactor) WaitSync() bool {
 	r.mtx.RLock()
 	defer r.mtx.RUnlock()
@@ -278,8 +278,8 @@ func ReactorMetrics(metrics *Metrics) ReactorOption {
 	return func(r *Reactor) { r.Metrics = metrics }
 }

-// SwitchToConsensus switches from fast-sync mode to consensus mode. It resets
-// the state, turns off fast-sync, and starts the consensus state-machine.
+// SwitchToConsensus switches from block-sync mode to consensus mode. It resets
+// the state, turns off block-sync, and starts the consensus state-machine.
 func (r *Reactor) SwitchToConsensus(state sm.State, skipWAL bool) {
 	r.Logger.Info("switching to consensus")

@@ -296,7 +296,7 @@ func (r *Reactor) SwitchToConsensus(state sm.State, skipWAL bool) {
 	r.waitSync = false
 	r.mtx.Unlock()

-	r.Metrics.FastSyncing.Set(0)
+	r.Metrics.BlockSyncing.Set(0)
 	r.Metrics.StateSyncing.Set(0)

 	if skipWAL {
@@ -313,9 +313,9 @@ conR:
 %+v`, err, r.state, r))
 	}

-	d := types.EventDataFastSyncStatus{Complete: true, Height: state.LastBlockHeight}
-	if err := r.eventBus.PublishEventFastSyncStatus(d); err != nil {
-		r.Logger.Error("failed to emit the fastsync complete event", "err", err)
+	d := types.EventDataBlockSyncStatus{Complete: true, Height: state.LastBlockHeight}
+	if err := r.eventBus.PublishEventBlockSyncStatus(d); err != nil {
+		r.Logger.Error("failed to emit the blocksync complete event", "err", err)
 	}
 }

@@ -969,7 +969,7 @@ func (r *Reactor) processPeerUpdate(peerUpdate p2p.PeerUpdate) {
 			go r.gossipVotesRoutine(ps)
 			go r.queryMaj23Routine(ps)

-			// Send our state to the peer. If we're fast-syncing, broadcast a
+			// Send our state to the peer. If we're block-syncing, broadcast a
 			// RoundStepMessage later upon SwitchToConsensus().
 			if !r.waitSync {
 				go r.sendNewRoundStepMessage(ps.peerID)
@@ -1219,7 +1219,7 @@ func (r *Reactor) handleVoteSetBitsMessage(envelope p2p.Envelope, msgI Message)
 // It will handle errors and any possible panics gracefully. A caller can handle
 // any error returned by sending a PeerError on the respective channel.
 //
-// NOTE: We process these messages even when we're fast_syncing. Messages affect
+// NOTE: We process these messages even when we're block syncing. Messages affect
 // either a peer state or the consensus state. Peer state updates can happen in
 // parallel, but processing of proposals, block parts, and votes are ordered by
 // the p2p channel.
@@ -1442,6 +1442,6 @@ func (r *Reactor) SetStateSyncingMetrics(v float64) {
 	r.Metrics.StateSyncing.Set(v)
 }

-func (r *Reactor) SetFastSyncingMetrics(v float64) {
-	r.Metrics.FastSyncing.Set(v)
+func (r *Reactor) SetBlockSyncingMetrics(v float64) {
+	r.Metrics.BlockSyncing.Set(v)
 }
--- a/internal/consensus/reactor_test.go
+++ b/internal/consensus/reactor_test.go
@@ -43,7 +43,7 @@ type reactorTestSuite struct {
 	states              map[types.NodeID]*State
 	reactors            map[types.NodeID]*Reactor
 	subs                map[types.NodeID]types.Subscription
-	fastsyncSubs        map[types.NodeID]types.Subscription
+	blocksyncSubs       map[types.NodeID]types.Subscription
 	stateChannels       map[types.NodeID]*p2p.Channel
 	dataChannels        map[types.NodeID]*p2p.Channel
 	voteChannels        map[types.NodeID]*p2p.Channel
@@ -60,11 +60,11 @@ func setup(t *testing.T, numNodes int, states []*State, size int) *reactorTestSu
 	t.Helper()

 	rts := &reactorTestSuite{
-		network:      p2ptest.MakeNetwork(t, p2ptest.NetworkOptions{NumNodes: numNodes}),
-		states:       make(map[types.NodeID]*State),
-		reactors:     make(map[types.NodeID]*Reactor, numNodes),
-		subs:         make(map[types.NodeID]types.Subscription, numNodes),
-		fastsyncSubs: make(map[types.NodeID]types.Subscription, numNodes),
+		network:       p2ptest.MakeNetwork(t, p2ptest.NetworkOptions{NumNodes: numNodes}),
+		states:        make(map[types.NodeID]*State),
+		reactors:      make(map[types.NodeID]*Reactor, numNodes),
+		subs:          make(map[types.NodeID]types.Subscription, numNodes),
+		blocksyncSubs: make(map[types.NodeID]types.Subscription, numNodes),
 	}

 	rts.stateChannels = rts.network.MakeChannelsNoCleanup(t, chDesc(StateChannel), new(tmcons.Message), size)
@@ -94,13 +94,13 @@ func setup(t *testing.T, numNodes int, states []*State, size int) *reactorTestSu
 		blocksSub, err := state.eventBus.Subscribe(context.Background(), testSubscriber, types.EventQueryNewBlock, size)
 		require.NoError(t, err)

-		fsSub, err := state.eventBus.Subscribe(context.Background(), testSubscriber, types.EventQueryFastSyncStatus, size)
+		fsSub, err := state.eventBus.Subscribe(context.Background(), testSubscriber, types.EventQueryBlockSyncStatus, size)
 		require.NoError(t, err)

 		rts.states[nodeID] = state
 		rts.subs[nodeID] = blocksSub
 		rts.reactors[nodeID] = reactor
-		rts.fastsyncSubs[nodeID] = fsSub
+		rts.blocksyncSubs[nodeID] = fsSub

 		// simulate handle initChain in handshake
 		if state.state.LastBlockHeight == 0 {
@@ -263,9 +263,9 @@ func waitForBlockWithUpdatedValsAndValidateIt(
 	wg.Wait()
 }

-func ensureFastSyncStatus(t *testing.T, msg tmpubsub.Message, complete bool, height int64) {
+func ensureBlockSyncStatus(t *testing.T, msg tmpubsub.Message, complete bool, height int64) {
 	t.Helper()
-	status, ok := msg.Data().(types.EventDataFastSyncStatus)
+	status, ok := msg.Data().(types.EventDataBlockSyncStatus)

 	require.True(t, ok)
 	require.Equal(t, complete, status.Complete)
@@ -301,14 +301,14 @@ func TestReactorBasic(t *testing.T) {

 	wg.Wait()

-	for _, sub := range rts.fastsyncSubs {
+	for _, sub := range rts.blocksyncSubs {
 		wg.Add(1)

 		// wait till everyone makes the consensus switch
 		go func(s types.Subscription) {
 			defer wg.Done()
 			msg := <-s.Out()
-			ensureFastSyncStatus(t, msg, true, 0)
+			ensureBlockSyncStatus(t, msg, true, 0)
 		}(sub)
 	}

--- a/internal/libs/progressbar/progressbar.go
+++ b/internal/libs/progressbar/progressbar.go
@@ -0,0 +1,41 @@
+package progressbar
+
+import "fmt"
+
+// the progressbar indicates the current status and progress would be desired.
+// ref: https://www.pixelstech.net/article/1596946473-A-simple-example-on-implementing-progress-bar-in-GoLang
+
+type Bar struct {
+	percent int64  // progress percentage
+	cur     int64  // current progress
+	start   int64  // the init starting value for progress
+	total   int64  // total value for progress
+	rate    string // the actual progress bar to be printed
+	graph   string // the fill value for progress bar
+}
+
+func (bar *Bar) NewOption(start, total int64) {
+	bar.cur = start
+	bar.start = start
+	bar.total = total
+	bar.graph = "█"
+	bar.percent = bar.getPercent()
+}
+
+func (bar *Bar) getPercent() int64 {
+	return int64(float32(bar.cur-bar.start) / float32(bar.total-bar.start) * 100)
+}
+
+func (bar *Bar) Play(cur int64) {
+	bar.cur = cur
+	last := bar.percent
+	bar.percent = bar.getPercent()
+	if bar.percent != last && bar.percent%2 == 0 {
+		bar.rate += bar.graph
+	}
+	fmt.Printf("\r[%-50s]%3d%% %8d/%d", bar.rate, bar.percent, bar.cur, bar.total)
+}
+
+func (bar *Bar) Finish() {
+	fmt.Println()
+}
--- a/internal/libs/progressbar/progressbar_test.go
+++ b/internal/libs/progressbar/progressbar_test.go
@@ -0,0 +1,41 @@
+package progressbar
+
+import (
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestProgressBar(t *testing.T) {
+	zero := int64(0)
+	hundred := int64(100)
+
+	var bar Bar
+	bar.NewOption(zero, hundred)
+
+	require.Equal(t, zero, bar.start)
+	require.Equal(t, zero, bar.cur)
+	require.Equal(t, hundred, bar.total)
+	require.Equal(t, zero, bar.percent)
+	require.Equal(t, "█", bar.graph)
+	require.Equal(t, "", bar.rate)
+
+	defer bar.Finish()
+	for i := zero; i <= hundred; i++ {
+		time.Sleep(1 * time.Millisecond)
+		bar.Play(i)
+	}
+
+	require.Equal(t, zero, bar.start)
+	require.Equal(t, hundred, bar.cur)
+	require.Equal(t, hundred, bar.total)
+	require.Equal(t, hundred, bar.percent)
+
+	var rate string
+	for i := zero; i < hundred/2; i++ {
+		rate += "█"
+	}
+
+	require.Equal(t, rate, bar.rate)
+}
--- a/internal/mempool/v1/mempool.go
+++ b/internal/mempool/v1/mempool.go
@@ -188,8 +188,8 @@ func (txmp *TxMempool) WaitForNextTx() <-chan struct{} {
 // NextGossipTx returns the next valid transaction to gossip. A caller must wait
 // for WaitForNextTx to signal a transaction is available to gossip first. It is
 // thread-safe.
-func (txmp *TxMempool) NextGossipTx() *WrappedTx {
-	return txmp.gossipIndex.Front().Value.(*WrappedTx)
+func (txmp *TxMempool) NextGossipTx() *clist.CElement {
+	return txmp.gossipIndex.Front()
 }

 // EnableTxsAvailable enables the mempool to trigger events when transactions
--- a/internal/mempool/v1/reactor.go
+++ b/internal/mempool/v1/reactor.go
@@ -9,6 +9,7 @@ import (
 	"time"

 	cfg "github.com/tendermint/tendermint/config"
+	"github.com/tendermint/tendermint/internal/libs/clist"
 	tmsync "github.com/tendermint/tendermint/internal/libs/sync"
 	"github.com/tendermint/tendermint/internal/mempool"
 	"github.com/tendermint/tendermint/internal/p2p"
@@ -306,7 +307,7 @@ func (r *Reactor) processPeerUpdates() {

 func (r *Reactor) broadcastTxRoutine(peerID types.NodeID, closer *tmsync.Closer) {
 	peerMempoolID := r.ids.GetForPeer(peerID)
-	var memTx *WrappedTx
+	var nextGossipTx *clist.CElement

 	// remove the peer ID from the map of routines and mark the waitgroup as done
 	defer func() {
@@ -333,10 +334,10 @@ func (r *Reactor) broadcastTxRoutine(peerID types.NodeID, closer *tmsync.Closer)
 		// This happens because the CElement we were looking at got garbage
 		// collected (removed). That is, .NextWait() returned nil. Go ahead and
 		// start from the beginning.
-		if memTx == nil {
+		if nextGossipTx == nil {
 			select {
 			case <-r.mempool.WaitForNextTx(): // wait until a tx is available
-				if memTx = r.mempool.NextGossipTx(); memTx == nil {
+				if nextGossipTx = r.mempool.NextGossipTx(); nextGossipTx == nil {
 					continue
 				}

@@ -352,6 +353,8 @@ func (r *Reactor) broadcastTxRoutine(peerID types.NodeID, closer *tmsync.Closer)
 			}
 		}

+		memTx := nextGossipTx.Value.(*WrappedTx)
+
 		if r.peerMgr != nil {
 			height := r.peerMgr.GetHeight(peerID)
 			if height > 0 && height < memTx.height-1 {
@@ -380,16 +383,8 @@ func (r *Reactor) broadcastTxRoutine(peerID types.NodeID, closer *tmsync.Closer)
 		}

 		select {
-		case <-memTx.gossipEl.NextWaitChan():
-			// If there is a next element in gossip index, we point memTx to that node's
-			// value, otherwise we reset memTx to nil which will be checked at the
-			// parent for loop.
-			next := memTx.gossipEl.Next()
-			if next != nil {
-				memTx = next.Value.(*WrappedTx)
-			} else {
-				memTx = nil
-			}
+		case <-nextGossipTx.NextWaitChan():
+			nextGossipTx = nextGossipTx.Next()

 		case <-closer.Done():
 			// The peer is marked for removal via a PeerUpdate as the doneCh was
--- a/node/node.go
+++ b/node/node.go
@@ -66,7 +66,7 @@ type nodeImpl struct {
 	eventBus         *types.EventBus // pub/sub for services
 	stateStore       sm.Store
 	blockStore       *store.BlockStore // store the blockchain to disk
-	bcReactor        service.Service   // for fast-syncing
+	bcReactor        service.Service   // for block-syncing
 	mempoolReactor   service.Service   // for gossipping transactions
 	mempool          mempool.Mempool
 	stateSync        bool               // whether the node should state sync on startup
@@ -225,9 +225,9 @@ func makeNode(config *cfg.Config,
 		}
 	}

-	// Determine whether we should do fast sync. This must happen after the handshake, since the
+	// Determine whether we should do block sync. This must happen after the handshake, since the
 	// app may modify the validator set, specifying ourself as the only validator.
-	fastSync := config.FastSyncMode && !onlyValidatorIsUs(state, pubKey)
+	blockSync := config.FastSyncMode && !onlyValidatorIsUs(state, pubKey)

 	logNodeStartupInfo(state, pubKey, logger, consensusLogger, config.Mode)

@@ -281,15 +281,15 @@ func makeNode(config *cfg.Config,

 	csReactorShim, csReactor, csState := createConsensusReactor(
 		config, state, blockExec, blockStore, mp, evPool,
-		privValidator, csMetrics, stateSync || fastSync, eventBus,
+		privValidator, csMetrics, stateSync || blockSync, eventBus,
 		peerManager, router, consensusLogger,
 	)

-	// Create the blockchain reactor. Note, we do not start fast sync if we're
+	// Create the blockchain reactor. Note, we do not start block sync if we're
 	// doing a state sync first.
 	bcReactorShim, bcReactor, err := createBlockchainReactor(
 		logger, config, state, blockExec, blockStore, csReactor,
-		peerManager, router, fastSync && !stateSync, csMetrics,
+		peerManager, router, blockSync && !stateSync, csMetrics,
 	)
 	if err != nil {
 		return nil, fmt.Errorf("could not create blockchain reactor: %w", err)
@@ -303,16 +303,16 @@ func makeNode(config *cfg.Config,
 		bcReactorForSwitch = bcReactor.(p2p.Reactor)
 	}

-	// Make ConsensusReactor. Don't enable fully if doing a state sync and/or fast sync first.
+	// Make ConsensusReactor. Don't enable fully if doing a state sync and/or block sync first.
 	// FIXME We need to update metrics here, since other reactors don't have access to them.
 	if stateSync {
 		csMetrics.StateSyncing.Set(1)
-	} else if fastSync {
-		csMetrics.FastSyncing.Set(1)
+	} else if blockSync {
+		csMetrics.BlockSyncing.Set(1)
 	}

 	// Set up state sync reactor, and schedule a sync if requested.
-	// FIXME The way we do phased startups (e.g. replay -> fast sync -> consensus) is very messy,
+	// FIXME The way we do phased startups (e.g. replay -> block sync -> consensus) is very messy,
 	// we should clean this whole thing up. See:
 	// https://github.com/tendermint/tendermint/issues/4644
 	var (
@@ -610,7 +610,7 @@ func (n *nodeImpl) OnStart() error {
 	}

 	if n.config.Mode != cfg.ModeSeed {
-		if n.config.FastSync.Version == cfg.BlockchainV0 {
+		if n.config.BlockSync.Version == cfg.BlockSyncV0 {
 			// Start the real blockchain reactor separately since the switch uses the shim.
 			if err := n.bcReactor.Start(); err != nil {
 				return err
@@ -653,7 +653,7 @@ func (n *nodeImpl) OnStart() error {

 	// Run state sync
 	if n.stateSync {
-		bcR, ok := n.bcReactor.(cs.FastSyncReactor)
+		bcR, ok := n.bcReactor.(cs.BlockSyncReactor)
 		if !ok {
 			return fmt.Errorf("this blockchain reactor does not support switching from state sync")
 		}
@@ -695,7 +695,7 @@ func (n *nodeImpl) OnStop() {

 	if n.config.Mode != cfg.ModeSeed {
 		// now stop the reactors
-		if n.config.FastSync.Version == cfg.BlockchainV0 {
+		if n.config.BlockSync.Version == cfg.BlockSyncV0 {
 			// Stop the real blockchain reactor separately since the switch uses the shim.
 			if err := n.bcReactor.Stop(); err != nil {
 				n.Logger.Error("failed to stop the blockchain reactor", "err", err)
@@ -788,8 +788,8 @@ func (n *nodeImpl) ConfigureRPC() (*rpccore.Environment, error) {

 		Logger: n.Logger.With("module", "rpc"),

-		Config:          *n.config.RPC,
-		FastSyncReactor: n.bcReactor.(cs.FastSyncReactor),
+		Config:           *n.config.RPC,
+		BlockSyncReactor: n.bcReactor.(cs.BlockSyncReactor),
 	}
 	if n.config.Mode == cfg.ModeValidator {
 		pubKey, err := n.privValidator.GetPubKey(context.TODO())
@@ -1033,14 +1033,14 @@ func (n *nodeImpl) NodeInfo() types.NodeInfo {
 	return n.nodeInfo
 }

-// startStateSync starts an asynchronous state sync process, then switches to fast sync mode.
+// startStateSync starts an asynchronous state sync process, then switches to block sync mode.
 func startStateSync(
 	ssR statesync.SyncReactor,
-	bcR cs.FastSyncReactor,
+	bcR cs.BlockSyncReactor,
 	conR cs.ConsSyncReactor,
 	sp statesync.StateProvider,
 	config *cfg.StateSyncConfig,
-	fastSync bool,
+	blockSync bool,
 	stateInitHeight int64,
 	eb *types.EventBus,
 ) error {
@@ -1074,17 +1074,17 @@ func startStateSync(
 			stateSyncLogger.Error("failed to emit the statesync start event", "err", err)
 		}

-		if fastSync {
+		if blockSync {
 			// FIXME Very ugly to have these metrics bleed through here.
-			conR.SetFastSyncingMetrics(1)
-			if err := bcR.SwitchToFastSync(state); err != nil {
-				stateSyncLogger.Error("failed to switch to fast sync", "err", err)
+			conR.SetBlockSyncingMetrics(1)
+			if err := bcR.SwitchToBlockSync(state); err != nil {
+				stateSyncLogger.Error("failed to switch to block sync", "err", err)
 				return
 			}

-			d := types.EventDataFastSyncStatus{Complete: false, Height: state.LastBlockHeight}
-			if err := eb.PublishEventFastSyncStatus(d); err != nil {
-				stateSyncLogger.Error("failed to emit the fastsync starting event", "err", err)
+			d := types.EventDataBlockSyncStatus{Complete: false, Height: state.LastBlockHeight}
+			if err := eb.PublishEventBlockSyncStatus(d); err != nil {
+				stateSyncLogger.Error("failed to emit the block sync starting event", "err", err)
 			}

 		} else {
--- a/node/node_test.go
+++ b/node/node_test.go
@@ -659,7 +659,7 @@ func loadStatefromGenesis(t *testing.T) sm.State {

 func TestNodeStartStateSync(t *testing.T) {
 	mockSSR := &statesync.MockSyncReactor{}
-	mockFSR := &consmocks.FastSyncReactor{}
+	mockFSR := &consmocks.BlockSyncReactor{}
 	mockCSR := &consmocks.ConsSyncReactor{}
 	mockSP := &ssmocks.StateProvider{}
 	state := loadStatefromGenesis(t)
--- a/node/setup.go
+++ b/node/setup.go
@@ -16,8 +16,8 @@ import (
 	abci "github.com/tendermint/tendermint/abci/types"
 	cfg "github.com/tendermint/tendermint/config"
 	"github.com/tendermint/tendermint/crypto"
-	bcv0 "github.com/tendermint/tendermint/internal/blockchain/v0"
-	bcv2 "github.com/tendermint/tendermint/internal/blockchain/v2"
+	bcv0 "github.com/tendermint/tendermint/internal/blocksync/v0"
+	bcv2 "github.com/tendermint/tendermint/internal/blocksync/v2"
 	cs "github.com/tendermint/tendermint/internal/consensus"
 	"github.com/tendermint/tendermint/internal/evidence"
 	"github.com/tendermint/tendermint/internal/mempool"
@@ -337,14 +337,14 @@ func createBlockchainReactor(
 	csReactor *cs.Reactor,
 	peerManager *p2p.PeerManager,
 	router *p2p.Router,
-	fastSync bool,
+	blockSync bool,
 	metrics *cs.Metrics,
 ) (*p2p.ReactorShim, service.Service, error) {

 	logger = logger.With("module", "blockchain")

-	switch config.FastSync.Version {
-	case cfg.BlockchainV0:
+	switch config.BlockSync.Version {
+	case cfg.BlockSyncV0:
 		reactorShim := p2p.NewReactorShim(logger, "BlockchainShim", bcv0.ChannelShims)

 		var (
@@ -362,7 +362,7 @@ func createBlockchainReactor(

 		reactor, err := bcv0.NewReactor(
 			logger, state.Copy(), blockExec, blockStore, csReactor,
-			channels[bcv0.BlockchainChannel], peerUpdates, fastSync,
+			channels[bcv0.BlockchainChannel], peerUpdates, blockSync,
 			metrics,
 		)
 		if err != nil {
@@ -371,11 +371,11 @@ func createBlockchainReactor(

 		return reactorShim, reactor, nil

-	case cfg.BlockchainV2:
-		return nil, nil, errors.New("fastsync version v2 is no longer supported. Please use v0")
+	case cfg.BlockSyncV2:
+		return nil, nil, errors.New("block sync version v2 is no longer supported. Please use v0")

 	default:
-		return nil, nil, fmt.Errorf("unknown fastsync version %s", config.FastSync.Version)
+		return nil, nil, fmt.Errorf("unknown block sync version %s", config.BlockSync.Version)
 	}
 }

@@ -725,15 +725,15 @@ func makeNodeInfo(
 	}

 	var bcChannel byte
-	switch config.FastSync.Version {
-	case cfg.BlockchainV0:
+	switch config.BlockSync.Version {
+	case cfg.BlockSyncV0:
 		bcChannel = byte(bcv0.BlockchainChannel)

-	case cfg.BlockchainV2:
+	case cfg.BlockSyncV2:
 		bcChannel = bcv2.BlockchainChannel

 	default:
-		return types.NodeInfo{}, fmt.Errorf("unknown fastsync version %s", config.FastSync.Version)
+		return types.NodeInfo{}, fmt.Errorf("unknown blocksync version %s", config.BlockSync.Version)
 	}

 	nodeInfo := types.NodeInfo{
--- a/proto/tendermint/blockchain/message.go
+++ b/proto/tendermint/blockchain/message.go
@@ -1,4 +1,4 @@
-package blockchain
+package blocksync

 import (
 	"errors"
--- a/proto/tendermint/blockchain/message_test.go
+++ b/proto/tendermint/blockchain/message_test.go
@@ -1,4 +1,4 @@
-package blockchain_test
+package blocksync_test

 import (
 	"encoding/hex"
@@ -8,7 +8,7 @@ import (
 	proto "github.com/gogo/protobuf/proto"
 	"github.com/stretchr/testify/require"

-	bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
+	bcproto "github.com/tendermint/tendermint/proto/tendermint/blocksync"
 	"github.com/tendermint/tendermint/types"
 )

--- a/proto/tendermint/blockchain/types.pb.go
+++ b/proto/tendermint/blockchain/types.pb.go
@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-gogo. DO NOT EDIT.
-// source: tendermint/blockchain/types.proto
+// source: tendermint/blocksync/types.proto

-package blockchain
+package blocksync

 import (
 	fmt "fmt"
@@ -32,7 +32,7 @@ func (m *BlockRequest) Reset()         { *m = BlockRequest{} }
 func (m *BlockRequest) String() string { return proto.CompactTextString(m) }
 func (*BlockRequest) ProtoMessage()    {}
 func (*BlockRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_2927480384e78499, []int{0}
+	return fileDescriptor_19b397c236e0fa07, []int{0}
 }
 func (m *BlockRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -77,7 +77,7 @@ func (m *NoBlockResponse) Reset()         { *m = NoBlockResponse{} }
 func (m *NoBlockResponse) String() string { return proto.CompactTextString(m) }
 func (*NoBlockResponse) ProtoMessage()    {}
 func (*NoBlockResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_2927480384e78499, []int{1}
+	return fileDescriptor_19b397c236e0fa07, []int{1}
 }
 func (m *NoBlockResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -122,7 +122,7 @@ func (m *BlockResponse) Reset()         { *m = BlockResponse{} }
 func (m *BlockResponse) String() string { return proto.CompactTextString(m) }
 func (*BlockResponse) ProtoMessage()    {}
 func (*BlockResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_2927480384e78499, []int{2}
+	return fileDescriptor_19b397c236e0fa07, []int{2}
 }
 func (m *BlockResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -166,7 +166,7 @@ func (m *StatusRequest) Reset()         { *m = StatusRequest{} }
 func (m *StatusRequest) String() string { return proto.CompactTextString(m) }
 func (*StatusRequest) ProtoMessage()    {}
 func (*StatusRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_2927480384e78499, []int{3}
+	return fileDescriptor_19b397c236e0fa07, []int{3}
 }
 func (m *StatusRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -205,7 +205,7 @@ func (m *StatusResponse) Reset()         { *m = StatusResponse{} }
 func (m *StatusResponse) String() string { return proto.CompactTextString(m) }
 func (*StatusResponse) ProtoMessage()    {}
 func (*StatusResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_2927480384e78499, []int{4}
+	return fileDescriptor_19b397c236e0fa07, []int{4}
 }
 func (m *StatusResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -262,7 +262,7 @@ func (m *Message) Reset()         { *m = Message{} }
 func (m *Message) String() string { return proto.CompactTextString(m) }
 func (*Message) ProtoMessage()    {}
 func (*Message) Descriptor() ([]byte, []int) {
-	return fileDescriptor_2927480384e78499, []int{5}
+	return fileDescriptor_19b397c236e0fa07, []int{5}
 }
 func (m *Message) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -373,42 +373,41 @@ func (*Message) XXX_OneofWrappers() []interface{} {
 }

 func init() {
-	proto.RegisterType((*BlockRequest)(nil), "tendermint.blockchain.BlockRequest")
-	proto.RegisterType((*NoBlockResponse)(nil), "tendermint.blockchain.NoBlockResponse")
-	proto.RegisterType((*BlockResponse)(nil), "tendermint.blockchain.BlockResponse")
-	proto.RegisterType((*StatusRequest)(nil), "tendermint.blockchain.StatusRequest")
-	proto.RegisterType((*StatusResponse)(nil), "tendermint.blockchain.StatusResponse")
-	proto.RegisterType((*Message)(nil), "tendermint.blockchain.Message")
+	proto.RegisterType((*BlockRequest)(nil), "tendermint.blocksync.BlockRequest")
+	proto.RegisterType((*NoBlockResponse)(nil), "tendermint.blocksync.NoBlockResponse")
+	proto.RegisterType((*BlockResponse)(nil), "tendermint.blocksync.BlockResponse")
+	proto.RegisterType((*StatusRequest)(nil), "tendermint.blocksync.StatusRequest")
+	proto.RegisterType((*StatusResponse)(nil), "tendermint.blocksync.StatusResponse")
+	proto.RegisterType((*Message)(nil), "tendermint.blocksync.Message")
 }

-func init() { proto.RegisterFile("tendermint/blockchain/types.proto", fileDescriptor_2927480384e78499) }
+func init() { proto.RegisterFile("tendermint/blocksync/types.proto", fileDescriptor_19b397c236e0fa07) }

-var fileDescriptor_2927480384e78499 = []byte{
-	// 370 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x84, 0x93, 0xc1, 0x4e, 0xfa, 0x40,
-	0x10, 0xc6, 0xdb, 0x7f, 0x81, 0x7f, 0x32, 0x50, 0x1a, 0x9b, 0xa8, 0xc4, 0x98, 0x46, 0xab, 0x12,
-	0x3d, 0xd8, 0x26, 0x78, 0x25, 0x1e, 0x38, 0x11, 0x13, 0x8c, 0xa9, 0xc6, 0x83, 0x17, 0xd2, 0xe2,
-	0x86, 0x36, 0x4a, 0x17, 0xd9, 0xed, 0xc1, 0xb7, 0xf0, 0x19, 0x7c, 0x1a, 0x8f, 0x1c, 0x3d, 0x1a,
-	0x78, 0x11, 0xc3, 0x6c, 0x29, 0x4b, 0x03, 0xf5, 0xb6, 0x3b, 0xfd, 0xe6, 0x37, 0xdf, 0x7e, 0x99,
-	0xc2, 0x31, 0x27, 0xf1, 0x33, 0x99, 0x8c, 0xa2, 0x98, 0xbb, 0xc1, 0x2b, 0x1d, 0xbc, 0x0c, 0x42,
-	0x3f, 0x8a, 0x5d, 0xfe, 0x3e, 0x26, 0xcc, 0x19, 0x4f, 0x28, 0xa7, 0xe6, 0xee, 0x4a, 0xe2, 0xac,
-	0x24, 0x07, 0x87, 0x52, 0x27, 0xca, 0x45, 0xbf, 0x68, 0xb2, 0x9b, 0x50, 0xeb, 0x2c, 0xae, 0x1e,
-	0x79, 0x4b, 0x08, 0xe3, 0xe6, 0x1e, 0x54, 0x42, 0x12, 0x0d, 0x43, 0xde, 0x50, 0x8f, 0xd4, 0x73,
-	0xcd, 0x4b, 0x6f, 0xf6, 0x05, 0x18, 0xb7, 0x34, 0x55, 0xb2, 0x31, 0x8d, 0x19, 0xd9, 0x2a, 0xbd,
-	0x06, 0x7d, 0x5d, 0x78, 0x09, 0x65, 0x1c, 0x89, 0xba, 0x6a, 0x6b, 0xdf, 0x91, 0x8c, 0x8a, 0x07,
-	0x08, 0xbd, 0x50, 0xd9, 0x06, 0xe8, 0xf7, 0xdc, 0xe7, 0x09, 0x4b, 0x3d, 0xd9, 0x6d, 0xa8, 0x2f,
-	0x0b, 0xc5, 0xa3, 0x4d, 0x13, 0x4a, 0x81, 0xcf, 0x48, 0xe3, 0x1f, 0x56, 0xf1, 0x6c, 0x7f, 0x6a,
-	0xf0, 0xbf, 0x47, 0x18, 0xf3, 0x87, 0xc4, 0xbc, 0x01, 0x1d, 0x67, 0xf4, 0x27, 0x02, 0x9d, 0x3a,
-	0x3a, 0x71, 0x36, 0x46, 0xe7, 0xc8, 0xc9, 0x74, 0x15, 0xaf, 0x16, 0xc8, 0x49, 0x3d, 0xc0, 0x4e,
-	0x4c, 0xfb, 0x4b, 0x9c, 0x30, 0x86, 0x83, 0xab, 0xad, 0xe6, 0x16, 0x5e, 0x2e, 0xc1, 0xae, 0xe2,
-	0x19, 0x71, 0x2e, 0xd4, 0x1e, 0xd4, 0x73, 0x48, 0x0d, 0x91, 0xa7, 0xc5, 0x16, 0x33, 0xa0, 0x1e,
-	0xe4, 0x71, 0x0c, 0xa3, 0xcb, 0x5e, 0x5c, 0x2a, 0xc4, 0xad, 0x05, 0xbf, 0xc0, 0x31, 0xb9, 0x60,
-	0xde, 0x81, 0x91, 0xe1, 0x52, 0x7b, 0x65, 0xe4, 0x9d, 0xfd, 0xc1, 0xcb, 0xfc, 0xd5, 0xd9, 0x5a,
-	0xa5, 0x53, 0x06, 0x8d, 0x25, 0xa3, 0xce, 0xe3, 0xd7, 0xcc, 0x52, 0xa7, 0x33, 0x4b, 0xfd, 0x99,
-	0x59, 0xea, 0xc7, 0xdc, 0x52, 0xa6, 0x73, 0x4b, 0xf9, 0x9e, 0x5b, 0xca, 0x53, 0x7b, 0x18, 0xf1,
-	0x30, 0x09, 0x9c, 0x01, 0x1d, 0xb9, 0xf2, 0x26, 0xaf, 0x8e, 0xb8, 0xc8, 0xee, 0xc6, 0xff, 0x23,
-	0xa8, 0xe0, 0xc7, 0xab, 0xdf, 0x00, 0x00, 0x00, 0xff, 0xff, 0x5e, 0x59, 0x07, 0xbd, 0x3f, 0x03,
-	0x00, 0x00,
+var fileDescriptor_19b397c236e0fa07 = []byte{
+	// 368 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x93, 0x4d, 0x4f, 0xfa, 0x40,
+	0x10, 0xc6, 0xdb, 0x7f, 0x81, 0x7f, 0x32, 0x50, 0x1a, 0x1b, 0xa3, 0xc4, 0x98, 0x86, 0xd4, 0x97,
+	0xe8, 0xc1, 0x36, 0xc1, 0xa3, 0xc6, 0x03, 0x27, 0x4c, 0x7c, 0x49, 0x4a, 0xbc, 0x78, 0x21, 0x14,
+	0x37, 0x40, 0x94, 0x2e, 0x32, 0xdb, 0x03, 0xdf, 0xc2, 0x2f, 0xe0, 0xf7, 0xf1, 0xc8, 0xd1, 0xa3,
+	0x81, 0x2f, 0x62, 0x98, 0x2d, 0x65, 0x69, 0xb0, 0xb7, 0xdd, 0xe9, 0x33, 0xbf, 0x79, 0xfa, 0x64,
+	0x16, 0xea, 0x82, 0x45, 0x2f, 0x6c, 0x32, 0x1a, 0x46, 0xc2, 0x0f, 0xdf, 0x78, 0xef, 0x15, 0xa7,
+	0x51, 0xcf, 0x17, 0xd3, 0x31, 0x43, 0x6f, 0x3c, 0xe1, 0x82, 0xdb, 0xbb, 0x6b, 0x85, 0x97, 0x2a,
+	0x0e, 0x0e, 0x95, 0x3e, 0x52, 0xcb, 0x6e, 0xd9, 0xe3, 0x9e, 0x42, 0xa5, 0xb9, 0xbc, 0x06, 0xec,
+	0x3d, 0x66, 0x28, 0xec, 0x3d, 0x28, 0x0d, 0xd8, 0xb0, 0x3f, 0x10, 0x35, 0xbd, 0xae, 0x9f, 0x19,
+	0x41, 0x72, 0x73, 0xcf, 0xc1, 0x7a, 0xe0, 0x89, 0x12, 0xc7, 0x3c, 0x42, 0xf6, 0xa7, 0xf4, 0x06,
+	0xcc, 0x4d, 0xe1, 0x05, 0x14, 0x69, 0x24, 0xe9, 0xca, 0x8d, 0x7d, 0x4f, 0xf1, 0x29, 0xfd, 0x4b,
+	0xbd, 0x54, 0xb9, 0x16, 0x98, 0x6d, 0xd1, 0x15, 0x31, 0x26, 0x9e, 0xdc, 0x6b, 0xa8, 0xae, 0x0a,
+	0xf9, 0xa3, 0x6d, 0x1b, 0x0a, 0x61, 0x17, 0x59, 0xed, 0x1f, 0x55, 0xe9, 0xec, 0x7e, 0x1a, 0xf0,
+	0xff, 0x9e, 0x21, 0x76, 0xfb, 0xcc, 0xbe, 0x05, 0x93, 0x66, 0x74, 0x26, 0x12, 0x9d, 0x38, 0x72,
+	0xbd, 0x6d, 0xc9, 0x79, 0x6a, 0x30, 0x2d, 0x2d, 0xa8, 0x84, 0x6a, 0x50, 0x6d, 0xd8, 0x89, 0x78,
+	0x67, 0x45, 0x93, 0xbe, 0x68, 0x6e, 0xb9, 0x71, 0xb2, 0x1d, 0x97, 0xc9, 0xaf, 0xa5, 0x05, 0x56,
+	0x94, 0x89, 0xf4, 0x0e, 0xaa, 0x19, 0xa2, 0x41, 0xc4, 0xa3, 0x5c, 0x83, 0x29, 0xcf, 0x0c, 0xb3,
+	0x34, 0xa4, 0xdc, 0xd2, 0xdf, 0x2d, 0xe4, 0xd1, 0x36, 0x42, 0x5f, 0xd2, 0x50, 0x2d, 0xd8, 0x8f,
+	0x60, 0xa5, 0xb4, 0xc4, 0x5c, 0x91, 0x70, 0xc7, 0xf9, 0xb8, 0xd4, 0x5d, 0x15, 0x37, 0x2a, 0xcd,
+	0x22, 0x18, 0x18, 0x8f, 0x9a, 0x4f, 0x5f, 0x73, 0x47, 0x9f, 0xcd, 0x1d, 0xfd, 0x67, 0xee, 0xe8,
+	0x1f, 0x0b, 0x47, 0x9b, 0x2d, 0x1c, 0xed, 0x7b, 0xe1, 0x68, 0xcf, 0x57, 0xfd, 0xa1, 0x18, 0xc4,
+	0xa1, 0xd7, 0xe3, 0x23, 0x5f, 0x5d, 0xe2, 0xf5, 0x91, 0x76, 0xd8, 0xdf, 0xf6, 0x30, 0xc2, 0x12,
+	0x7d, 0xbb, 0xfc, 0x0d, 0x00, 0x00, 0xff, 0xff, 0xf5, 0x1c, 0xa3, 0x45, 0x37, 0x03, 0x00, 0x00,
 }

 func (m *BlockRequest) Marshal() (dAtA []byte, err error) {
--- a/proto/tendermint/blockchain/types.proto
+++ b/proto/tendermint/blockchain/types.proto
@@ -1,7 +1,7 @@
 syntax = "proto3";
-package tendermint.blockchain;
+package tendermint.blocksync;

-option go_package = "github.com/tendermint/tendermint/proto/tendermint/blockchain";
+option go_package = "github.com/tendermint/tendermint/proto/tendermint/blocksync";

 import "tendermint/types/block.proto";

--- a/rpc/core/env.go
+++ b/rpc/core/env.go
@@ -81,7 +81,7 @@ type Environment struct {
 	ConsensusReactor *consensus.Reactor
 	EventBus         *types.EventBus // thread safe
 	Mempool          mempl.Mempool
-	FastSyncReactor  consensus.FastSyncReactor
+	BlockSyncReactor consensus.BlockSyncReactor

 	Logger log.Logger

--- a/rpc/core/status.go
+++ b/rpc/core/status.go
@@ -69,10 +69,10 @@ func (env *Environment) Status(ctx *rpctypes.Context) (*ctypes.ResultStatus, err
 			EarliestAppHash:     earliestAppHash,
 			EarliestBlockHeight: earliestBlockHeight,
 			EarliestBlockTime:   time.Unix(0, earliestBlockTimeNano),
-			MaxPeerBlockHeight:  env.FastSyncReactor.GetMaxPeerBlockHeight(),
+			MaxPeerBlockHeight:  env.BlockSyncReactor.GetMaxPeerBlockHeight(),
 			CatchingUp:          env.ConsensusReactor.WaitSync(),
-			TotalSyncedTime:     env.FastSyncReactor.GetTotalSyncedTime(),
-			RemainingTime:       env.FastSyncReactor.GetRemainingSyncTime(),
+			TotalSyncedTime:     env.BlockSyncReactor.GetTotalSyncedTime(),
+			RemainingTime:       env.BlockSyncReactor.GetRemainingSyncTime(),
 		},
 		ValidatorInfo: validatorInfo,
 	}
--- a/state/indexer/eventsink.go
+++ b/state/indexer/eventsink.go
@@ -16,6 +16,8 @@ const (
 	PSQL EventSinkType = "psql"
 )

+//go:generate mockery --case underscore --name EventSink
+
 // EventSink interface is defined the APIs for the IndexerService to interact with the data store,
 // including the block/transaction indexing and the search functions.
 //
--- a/state/mocks/block_store.go
+++ b/state/mocks/block_store.go
@@ -0,0 +1,194 @@
+// Code generated by mockery 2.7.5. DO NOT EDIT.
+
+package mocks
+
+import (
+	mock "github.com/stretchr/testify/mock"
+
+	types "github.com/tendermint/tendermint/types"
+)
+
+// BlockStore is an autogenerated mock type for the BlockStore type
+type BlockStore struct {
+	mock.Mock
+}
+
+// Base provides a mock function with given fields:
+func (_m *BlockStore) Base() int64 {
+	ret := _m.Called()
+
+	var r0 int64
+	if rf, ok := ret.Get(0).(func() int64); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(int64)
+	}
+
+	return r0
+}
+
+// Height provides a mock function with given fields:
+func (_m *BlockStore) Height() int64 {
+	ret := _m.Called()
+
+	var r0 int64
+	if rf, ok := ret.Get(0).(func() int64); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(int64)
+	}
+
+	return r0
+}
+
+// LoadBaseMeta provides a mock function with given fields:
+func (_m *BlockStore) LoadBaseMeta() *types.BlockMeta {
+	ret := _m.Called()
+
+	var r0 *types.BlockMeta
+	if rf, ok := ret.Get(0).(func() *types.BlockMeta); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.BlockMeta)
+		}
+	}
+
+	return r0
+}
+
+// LoadBlock provides a mock function with given fields: height
+func (_m *BlockStore) LoadBlock(height int64) *types.Block {
+	ret := _m.Called(height)
+
+	var r0 *types.Block
+	if rf, ok := ret.Get(0).(func(int64) *types.Block); ok {
+		r0 = rf(height)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.Block)
+		}
+	}
+
+	return r0
+}
+
+// LoadBlockByHash provides a mock function with given fields: hash
+func (_m *BlockStore) LoadBlockByHash(hash []byte) *types.Block {
+	ret := _m.Called(hash)
+
+	var r0 *types.Block
+	if rf, ok := ret.Get(0).(func([]byte) *types.Block); ok {
+		r0 = rf(hash)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.Block)
+		}
+	}
+
+	return r0
+}
+
+// LoadBlockCommit provides a mock function with given fields: height
+func (_m *BlockStore) LoadBlockCommit(height int64) *types.Commit {
+	ret := _m.Called(height)
+
+	var r0 *types.Commit
+	if rf, ok := ret.Get(0).(func(int64) *types.Commit); ok {
+		r0 = rf(height)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.Commit)
+		}
+	}
+
+	return r0
+}
+
+// LoadBlockMeta provides a mock function with given fields: height
+func (_m *BlockStore) LoadBlockMeta(height int64) *types.BlockMeta {
+	ret := _m.Called(height)
+
+	var r0 *types.BlockMeta
+	if rf, ok := ret.Get(0).(func(int64) *types.BlockMeta); ok {
+		r0 = rf(height)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.BlockMeta)
+		}
+	}
+
+	return r0
+}
+
+// LoadBlockPart provides a mock function with given fields: height, index
+func (_m *BlockStore) LoadBlockPart(height int64, index int) *types.Part {
+	ret := _m.Called(height, index)
+
+	var r0 *types.Part
+	if rf, ok := ret.Get(0).(func(int64, int) *types.Part); ok {
+		r0 = rf(height, index)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.Part)
+		}
+	}
+
+	return r0
+}
+
+// LoadSeenCommit provides a mock function with given fields: height
+func (_m *BlockStore) LoadSeenCommit(height int64) *types.Commit {
+	ret := _m.Called(height)
+
+	var r0 *types.Commit
+	if rf, ok := ret.Get(0).(func(int64) *types.Commit); ok {
+		r0 = rf(height)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.Commit)
+		}
+	}
+
+	return r0
+}
+
+// PruneBlocks provides a mock function with given fields: height
+func (_m *BlockStore) PruneBlocks(height int64) (uint64, error) {
+	ret := _m.Called(height)
+
+	var r0 uint64
+	if rf, ok := ret.Get(0).(func(int64) uint64); ok {
+		r0 = rf(height)
+	} else {
+		r0 = ret.Get(0).(uint64)
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(int64) error); ok {
+		r1 = rf(height)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// SaveBlock provides a mock function with given fields: block, blockParts, seenCommit
+func (_m *BlockStore) SaveBlock(block *types.Block, blockParts *types.PartSet, seenCommit *types.Commit) {
+	_m.Called(block, blockParts, seenCommit)
+}
+
+// Size provides a mock function with given fields:
+func (_m *BlockStore) Size() int64 {
+	ret := _m.Called()
+
+	var r0 int64
+	if rf, ok := ret.Get(0).(func() int64); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(int64)
+	}
+
+	return r0
+}
--- a/state/mocks/event_sink.go
+++ b/state/mocks/event_sink.go
@@ -0,0 +1,167 @@
+// Code generated by mockery 2.7.5. DO NOT EDIT.
+
+package mocks
+
+import (
+	context "context"
+
+	mock "github.com/stretchr/testify/mock"
+	indexer "github.com/tendermint/tendermint/state/indexer"
+
+	query "github.com/tendermint/tendermint/libs/pubsub/query"
+
+	tenderminttypes "github.com/tendermint/tendermint/types"
+
+	types "github.com/tendermint/tendermint/abci/types"
+)
+
+// EventSink is an autogenerated mock type for the EventSink type
+type EventSink struct {
+	mock.Mock
+}
+
+// GetTxByHash provides a mock function with given fields: _a0
+func (_m *EventSink) GetTxByHash(_a0 []byte) (*types.TxResult, error) {
+	ret := _m.Called(_a0)
+
+	var r0 *types.TxResult
+	if rf, ok := ret.Get(0).(func([]byte) *types.TxResult); ok {
+		r0 = rf(_a0)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*types.TxResult)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func([]byte) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// HasBlock provides a mock function with given fields: _a0
+func (_m *EventSink) HasBlock(_a0 int64) (bool, error) {
+	ret := _m.Called(_a0)
+
+	var r0 bool
+	if rf, ok := ret.Get(0).(func(int64) bool); ok {
+		r0 = rf(_a0)
+	} else {
+		r0 = ret.Get(0).(bool)
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(int64) error); ok {
+		r1 = rf(_a0)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// IndexBlockEvents provides a mock function with given fields: _a0
+func (_m *EventSink) IndexBlockEvents(_a0 tenderminttypes.EventDataNewBlockHeader) error {
+	ret := _m.Called(_a0)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(tenderminttypes.EventDataNewBlockHeader) error); ok {
+		r0 = rf(_a0)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// IndexTxEvents provides a mock function with given fields: _a0
+func (_m *EventSink) IndexTxEvents(_a0 []*types.TxResult) error {
+	ret := _m.Called(_a0)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func([]*types.TxResult) error); ok {
+		r0 = rf(_a0)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// SearchBlockEvents provides a mock function with given fields: _a0, _a1
+func (_m *EventSink) SearchBlockEvents(_a0 context.Context, _a1 *query.Query) ([]int64, error) {
+	ret := _m.Called(_a0, _a1)
+
+	var r0 []int64
+	if rf, ok := ret.Get(0).(func(context.Context, *query.Query) []int64); ok {
+		r0 = rf(_a0, _a1)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]int64)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, *query.Query) error); ok {
+		r1 = rf(_a0, _a1)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// SearchTxEvents provides a mock function with given fields: _a0, _a1
+func (_m *EventSink) SearchTxEvents(_a0 context.Context, _a1 *query.Query) ([]*types.TxResult, error) {
+	ret := _m.Called(_a0, _a1)
+
+	var r0 []*types.TxResult
+	if rf, ok := ret.Get(0).(func(context.Context, *query.Query) []*types.TxResult); ok {
+		r0 = rf(_a0, _a1)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*types.TxResult)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, *query.Query) error); ok {
+		r1 = rf(_a0, _a1)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// Stop provides a mock function with given fields:
+func (_m *EventSink) Stop() error {
+	ret := _m.Called()
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func() error); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// Type provides a mock function with given fields:
+func (_m *EventSink) Type() indexer.EventSinkType {
+	ret := _m.Called()
+
+	var r0 indexer.EventSinkType
+	if rf, ok := ret.Get(0).(func() indexer.EventSinkType); ok {
+		r0 = rf()
+	} else {
+		r0 = ret.Get(0).(indexer.EventSinkType)
+	}
+
+	return r0
+}
--- a/state/services.go
+++ b/state/services.go
@@ -9,6 +9,8 @@ import (
 // NOTE: Interfaces used by RPC must be thread safe!
 //------------------------------------------------------

+//go:generate mockery --case underscore --name BlockStore
+
 //------------------------------------------------------
 // blockstore

--- a/test/e2e/README.md
+++ b/test/e2e/README.md
@@ -23,7 +23,7 @@ The above should hold for any arbitrary, valid network configuration, and that c

 A testnet configuration is specified as a TOML testnet manifest (see below). The testnet runner uses the manifest to configure a set of Docker containers and start them in some order. The manifests can be written manually (to test specific configurations) or generated randomly by the testnet generator (to test a wide range of configuration permutations).

-When running a testnet, the runner will first start the Docker nodes in some sequence, submit random transactions, and wait for the nodes to come online and the first blocks to be produced. This may involve e.g. waiting for nodes to fast sync and/or state sync. If specified, it will then run any misbehaviors (e.g. double-signing) and perturbations (e.g. killing or disconnecting nodes). It then waits for the testnet to stabilize, with all nodes online and having reached the latest height.
+When running a testnet, the runner will first start the Docker nodes in some sequence, submit random transactions, and wait for the nodes to come online and the first blocks to be produced. This may involve e.g. waiting for nodes to block sync and/or state sync. If specified, it will then run any misbehaviors (e.g. double-signing) and perturbations (e.g. killing or disconnecting nodes). It then waits for the testnet to stabilize, with all nodes online and having reached the latest height.

 Once the testnet stabilizes, a set of Go end-to-end tests are run against the live testnet to verify network invariants (for example that blocks are identical across nodes). These use the RPC client to interact with the network, and should consider the entire network as a black box (i.e. it should not test any network or node internals, only externally visible behavior via RPC). The tests may use the `testNode()` helper to run parallel tests against each individual testnet node, and/or inspect the full blockchain history via `fetchBlockChain()`.

--- a/test/e2e/generator/generate.go
+++ b/test/e2e/generator/generate.go
@@ -30,7 +30,7 @@ var (
 	nodeABCIProtocols    = uniformChoice{"unix", "tcp", "builtin", "grpc"}
 	nodePrivvalProtocols = uniformChoice{"file", "unix", "tcp", "grpc"}
 	// FIXME: v2 disabled due to flake
-	nodeFastSyncs         = uniformChoice{"v0"} // "v2"
+	nodeBlockSyncs        = uniformChoice{"v0"} // "v2"
 	nodeMempools          = uniformChoice{"v0", "v1"}
 	nodeStateSyncs        = uniformChoice{false, true}
 	nodePersistIntervals  = uniformChoice{0, 1, 5}
@@ -273,7 +273,7 @@ func generateNode(
 		Database:         nodeDatabases.Choose(r).(string),
 		ABCIProtocol:     nodeABCIProtocols.Choose(r).(string),
 		PrivvalProtocol:  nodePrivvalProtocols.Choose(r).(string),
-		FastSync:         nodeFastSyncs.Choose(r).(string),
+		BlockSync:        nodeBlockSyncs.Choose(r).(string),
 		Mempool:          nodeMempools.Choose(r).(string),
 		StateSync:        nodeStateSyncs.Choose(r).(bool) && startAt > 0,
 		PersistInterval:  ptrUint64(uint64(nodePersistIntervals.Choose(r).(int))),
@@ -311,7 +311,7 @@ func generateNode(
 	}

 	if node.StateSync {
-		node.FastSync = "v0"
+		node.BlockSync = "v0"
 	}

 	return &node
--- a/test/e2e/networks/ci.toml
+++ b/test/e2e/networks/ci.toml
@@ -30,11 +30,6 @@ validator05 = 50
 [node.seed01]
 mode = "seed"
 perturb = ["restart"]
-seeds = ["seed02"]
-
-[node.seed02]
-mode = "seed"
-seeds = ["seed01"]

 [node.validator01]
 perturb = ["disconnect"]
@@ -47,7 +42,7 @@ database = "boltdb"
 persist_interval = 0
 perturb = ["restart"]
 privval_protocol = "tcp"
-seeds = ["seed02"]
+seeds = ["seed01"]

 [node.validator03]
 database = "badgerdb"
@@ -66,29 +61,21 @@ perturb = ["pause"]

 [node.validator05]
 database = "cleveldb" 
-fast_sync = "v0" 
-seeds = ["seed02"] 
+block_sync = "v0" 
+seeds = ["seed01"] 
 start_at = 1005 # Becomes part of the validator set at 1010
 abci_protocol = "grpc"
-perturb = ["kill", "pause", "disconnect", "restart"]
+perturb = ["pause", "disconnect", "restart"]
 privval_protocol = "tcp"

 [node.full01]
 mode = "full"
 start_at = 1010
 # FIXME: should be v2, disabled due to flake
-fast_sync = "v0"
+block_sync = "v0"
 persistent_peers = ["validator01", "validator02", "validator03", "validator04", "validator05"]
 perturb = ["restart"]
 retain_blocks = 7
-
-[node.full02]
-mode = "full"
-start_at = 1015
-# FIXME: should be v2, disabled due to flake
-fast_sync = "v0"
-perturb = ["restart"]
-seeds = ["seed01"]
 state_sync = true

 [node.light01]
--- a/test/e2e/pkg/manifest.go
+++ b/test/e2e/pkg/manifest.go
@@ -106,9 +106,9 @@ type ManifestNode struct {
 	// runner will wait for the network to reach at least this block height.
 	StartAt int64 `toml:"start_at"`

-	// FastSync specifies the fast sync mode: "" (disable), "v0" or "v2".
+	// BlockSync specifies the block sync mode: "" (disable), "v0" or "v2".
 	// Defaults to disabled.
-	FastSync string `toml:"fast_sync"`
+	BlockSync string `toml:"block_sync"`

 	// Mempool specifies which version of mempool to use. Either "v0" or "v1"
 	Mempool string `toml:"mempool_version"`
--- a/test/e2e/pkg/testnet.go
+++ b/test/e2e/pkg/testnet.go
@@ -79,7 +79,7 @@ type Node struct {
 	IP               net.IP
 	ProxyPort        uint32
 	StartAt          int64
-	FastSync         string
+	BlockSync        string
 	Mempool          string
 	StateSync        bool
 	Database         string
@@ -168,7 +168,7 @@ func LoadTestnet(file string) (*Testnet, error) {
 			ABCIProtocol:     ProtocolBuiltin,
 			PrivvalProtocol:  ProtocolFile,
 			StartAt:          nodeManifest.StartAt,
-			FastSync:         nodeManifest.FastSync,
+			BlockSync:        nodeManifest.BlockSync,
 			Mempool:          nodeManifest.Mempool,
 			StateSync:        nodeManifest.StateSync,
 			PersistInterval:  1,
@@ -328,10 +328,10 @@ func (n Node) Validate(testnet Testnet) error {
 			}
 		}
 	}
-	switch n.FastSync {
+	switch n.BlockSync {
 	case "", "v0", "v2":
 	default:
-		return fmt.Errorf("invalid fast sync setting %q", n.FastSync)
+		return fmt.Errorf("invalid block sync setting %q", n.BlockSync)
 	}
 	switch n.Mempool {
 	case "", "v0", "v1":
--- a/test/e2e/runner/setup.go
+++ b/test/e2e/runner/setup.go
@@ -296,10 +296,10 @@ func MakeConfig(node *e2e.Node) (*config.Config, error) {
 		cfg.Mempool.Version = node.Mempool
 	}

-	if node.FastSync == "" {
+	if node.BlockSync == "" {
 		cfg.FastSyncMode = false
 	} else {
-		cfg.FastSync.Version = node.FastSync
+		cfg.BlockSync.Version = node.BlockSync
 	}

 	if node.StateSync {
--- a/types/event_bus.go
+++ b/types/event_bus.go
@@ -153,8 +153,8 @@ func (b *EventBus) PublishEventValidBlock(data EventDataRoundState) error {
 	return b.Publish(EventValidBlockValue, data)
 }

-func (b *EventBus) PublishEventFastSyncStatus(data EventDataFastSyncStatus) error {
-	return b.Publish(EventFastSyncStatusValue, data)
+func (b *EventBus) PublishEventBlockSyncStatus(data EventDataBlockSyncStatus) error {
+	return b.Publish(EventBlockSyncStatusValue, data)
 }

 func (b *EventBus) PublishEventStateSyncStatus(data EventDataStateSyncStatus) error {
@@ -317,7 +317,7 @@ func (NopEventBus) PublishEventValidatorSetUpdates(data EventDataValidatorSetUpd
 	return nil
 }

-func (NopEventBus) PublishEventFastSyncStatus(data EventDataFastSyncStatus) error {
+func (NopEventBus) PublishEventBlockSyncStatus(data EventDataBlockSyncStatus) error {
 	return nil
 }

--- a/types/event_bus_test.go
+++ b/types/event_bus_test.go
@@ -370,7 +370,7 @@ func TestEventBusPublish(t *testing.T) {
 	require.NoError(t, err)
 	err = eventBus.PublishEventValidatorSetUpdates(EventDataValidatorSetUpdates{})
 	require.NoError(t, err)
-	err = eventBus.PublishEventFastSyncStatus(EventDataFastSyncStatus{})
+	err = eventBus.PublishEventBlockSyncStatus(EventDataBlockSyncStatus{})
 	require.NoError(t, err)
 	err = eventBus.PublishEventStateSyncStatus(EventDataStateSyncStatus{})
 	require.NoError(t, err)
@@ -480,7 +480,7 @@ var events = []string{
 	EventRelockValue,
 	EventTimeoutWaitValue,
 	EventVoteValue,
-	EventFastSyncStatusValue,
+	EventBlockSyncStatusValue,
 	EventStateSyncStatusValue,
 }

@@ -502,7 +502,9 @@ var queries = []tmpubsub.Query{
 	EventQueryRelock,
 	EventQueryTimeoutWait,
 	EventQueryVote,
-	EventQueryFastSyncStatus}
+	EventQueryBlockSyncStatus,
+	EventQueryStateSyncStatus,
+}

 func randQuery() tmpubsub.Query {
 	return queries[mrand.Intn(len(queries))]
--- a/types/events.go
+++ b/types/events.go
@@ -27,9 +27,9 @@ const (
 	// These are used for testing the consensus state machine.
 	// They can also be used to build real-time consensus visualizers.
 	EventCompleteProposalValue = "CompleteProposal"
-	// The FastSyncStatus event will be emitted when the node switching
-	// state sync mechanism between the consensus reactor and the fastsync reactor.
-	EventFastSyncStatusValue  = "FastSyncStatus"
+	// The BlockSyncStatus event will be emitted when the node switching
+	// state sync mechanism between the consensus reactor and the blocksync reactor.
+	EventBlockSyncStatusValue = "BlockSyncStatus"
 	EventLockValue            = "Lock"
 	EventNewRoundValue        = "NewRound"
 	EventNewRoundStepValue    = "NewRoundStep"
@@ -104,7 +104,7 @@ func init() {
 	tmjson.RegisterType(EventDataVote{}, "tendermint/event/Vote")
 	tmjson.RegisterType(EventDataValidatorSetUpdates{}, "tendermint/event/ValidatorSetUpdates")
 	tmjson.RegisterType(EventDataString(""), "tendermint/event/ProposalString")
-	tmjson.RegisterType(EventDataFastSyncStatus{}, "tendermint/event/FastSyncStatus")
+	tmjson.RegisterType(EventDataBlockSyncStatus{}, "tendermint/event/FastSyncStatus")
 	tmjson.RegisterType(EventDataStateSyncStatus{}, "tendermint/event/StateSyncStatus")
 }

@@ -176,9 +176,9 @@ type EventDataValidatorSetUpdates struct {
 	ValidatorUpdates []*Validator `json:"validator_updates"`
 }

-// EventDataFastSyncStatus shows the fastsync status and the
+// EventDataBlockSyncStatus shows the fastsync status and the
 // height when the node state sync mechanism changes.
-type EventDataFastSyncStatus struct {
+type EventDataBlockSyncStatus struct {
 	Complete bool  `json:"complete"`
 	Height   int64 `json:"height"`
 }
@@ -227,7 +227,7 @@ var (
 	EventQueryValidatorSetUpdates = QueryForEvent(EventValidatorSetUpdatesValue)
 	EventQueryValidBlock          = QueryForEvent(EventValidBlockValue)
 	EventQueryVote                = QueryForEvent(EventVoteValue)
-	EventQueryFastSyncStatus      = QueryForEvent(EventFastSyncStatusValue)
+	EventQueryBlockSyncStatus     = QueryForEvent(EventBlockSyncStatusValue)
 	EventQueryStateSyncStatus     = QueryForEvent(EventStateSyncStatusValue)
 )