diff --git a/CHANGELOG_PENDING.md b/CHANGELOG_PENDING.md
index 45762880f..de3a18ab6 100644
--- 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
 
diff --git a/UPGRADING.md b/UPGRADING.md
index 6687f8e77..cc721af8e 100644
--- 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
 
diff --git a/config/config.go b/config/config.go
index 99b82fb46..7d19616aa 100644
--- 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)
 	}
 }
 
diff --git a/config/config_test.go b/config/config_test.go
index 9801b75cd..075cedc6a 100644
--- 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
diff --git a/config/toml.go b/config/toml.go
index aae716a58..edb192109 100644
--- 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         ###
diff --git a/docs/nodes/configuration.md b/docs/nodes/configuration.md
index 6e2665b26..b5259f93f 100644
--- 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"
 
diff --git a/docs/tendermint-core/README.md b/docs/tendermint-core/README.md
index 666eff16d..fb359a08b 100644
--- 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)
diff --git a/docs/tendermint-core/fast-sync.md b/docs/tendermint-core/block-sync.md
similarity index 76%
rename from docs/tendermint-core/fast-sync.md
rename to docs/tendermint-core/block-sync.md
index afc668277..9d362424f 100644
--- a/docs/tendermint-core/fast-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.
\ No newline at end of file
diff --git a/docs/tendermint-core/state-sync.md b/docs/tendermint-core/state-sync.md
index 623de4953..52286e6c7 100644
--- 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. 
 
diff --git a/internal/blockchain/doc.go b/internal/blocksync/doc.go
similarity index 73%
rename from internal/blockchain/doc.go
rename to internal/blocksync/doc.go
index f1db243c6..3111130e4 100644
--- a/internal/blockchain/doc.go
+++ b/internal/blocksync/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
diff --git a/internal/blockchain/msgs.go b/internal/blocksync/msgs.go
similarity index 90%
rename from internal/blockchain/msgs.go
rename to internal/blocksync/msgs.go
index e901ae1e3..caad44b7b 100644
--- a/internal/blockchain/msgs.go
+++ b/internal/blocksync/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"
 )
 
diff --git a/internal/blockchain/v0/pool.go b/internal/blocksync/v0/pool.go
similarity index 99%
rename from internal/blockchain/v0/pool.go
rename to internal/blocksync/v0/pool.go
index c9c4030a8..b3704f333 100644
--- a/internal/blockchain/v0/pool.go
+++ b/internal/blocksync/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
diff --git a/internal/blockchain/v0/pool_test.go b/internal/blocksync/v0/pool_test.go
similarity index 100%
rename from internal/blockchain/v0/pool_test.go
rename to internal/blocksync/v0/pool_test.go
diff --git a/internal/blockchain/v0/reactor.go b/internal/blocksync/v0/reactor.go
similarity index 96%
rename from internal/blockchain/v0/reactor.go
rename to internal/blocksync/v0/reactor.go
index 52a17b693..c43959808 100644
--- a/internal/blockchain/v0/reactor.go
+++ b/internal/blocksync/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)
 	}
 
diff --git a/internal/blockchain/v0/reactor_test.go b/internal/blocksync/v0/reactor_test.go
similarity index 99%
rename from internal/blockchain/v0/reactor_test.go
rename to internal/blocksync/v0/reactor_test.go
index 1c9dc60c4..e038b57af 100644
--- a/internal/blockchain/v0/reactor_test.go
+++ b/internal/blocksync/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)
 
diff --git a/internal/blockchain/v2/internal/behavior/doc.go b/internal/blocksync/v2/internal/behavior/doc.go
similarity index 100%
rename from internal/blockchain/v2/internal/behavior/doc.go
rename to internal/blocksync/v2/internal/behavior/doc.go
diff --git a/internal/blockchain/v2/internal/behavior/peer_behaviour.go b/internal/blocksync/v2/internal/behavior/peer_behaviour.go
similarity index 100%
rename from internal/blockchain/v2/internal/behavior/peer_behaviour.go
rename to internal/blocksync/v2/internal/behavior/peer_behaviour.go
diff --git a/internal/blockchain/v2/internal/behavior/reporter.go b/internal/blocksync/v2/internal/behavior/reporter.go
similarity index 100%
rename from internal/blockchain/v2/internal/behavior/reporter.go
rename to internal/blocksync/v2/internal/behavior/reporter.go
diff --git a/internal/blockchain/v2/internal/behavior/reporter_test.go b/internal/blocksync/v2/internal/behavior/reporter_test.go
similarity index 98%
rename from internal/blockchain/v2/internal/behavior/reporter_test.go
rename to internal/blocksync/v2/internal/behavior/reporter_test.go
index a045f19aa..861a63df0 100644
--- a/internal/blockchain/v2/internal/behavior/reporter_test.go
+++ b/internal/blocksync/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"
 )
 
diff --git a/internal/blockchain/v2/io.go b/internal/blocksync/v2/io.go
similarity index 98%
rename from internal/blockchain/v2/io.go
rename to internal/blocksync/v2/io.go
index 8d02c408e..743428516 100644
--- a/internal/blockchain/v2/io.go
+++ b/internal/blocksync/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)
 }
diff --git a/internal/blockchain/v2/metrics.go b/internal/blocksync/v2/metrics.go
similarity index 100%
rename from internal/blockchain/v2/metrics.go
rename to internal/blocksync/v2/metrics.go
diff --git a/internal/blockchain/v2/processor.go b/internal/blocksync/v2/processor.go
similarity index 100%
rename from internal/blockchain/v2/processor.go
rename to internal/blocksync/v2/processor.go
diff --git a/internal/blockchain/v2/processor_context.go b/internal/blocksync/v2/processor_context.go
similarity index 100%
rename from internal/blockchain/v2/processor_context.go
rename to internal/blocksync/v2/processor_context.go
diff --git a/internal/blockchain/v2/processor_test.go b/internal/blocksync/v2/processor_test.go
similarity index 100%
rename from internal/blockchain/v2/processor_test.go
rename to internal/blocksync/v2/processor_test.go
diff --git a/internal/blockchain/v2/reactor.go b/internal/blocksync/v2/reactor.go
similarity index 92%
rename from internal/blockchain/v2/reactor.go
rename to internal/blocksync/v2/reactor.go
index af18f3c0a..caa5d73f0 100644
--- a/internal/blockchain/v2/reactor.go
+++ b/internal/blocksync/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)
 	}
 
diff --git a/internal/blockchain/v2/reactor_test.go b/internal/blocksync/v2/reactor_test.go
similarity index 99%
rename from internal/blockchain/v2/reactor_test.go
rename to internal/blocksync/v2/reactor_test.go
index f4ded22da..4120b3942 100644
--- a/internal/blockchain/v2/reactor_test.go
+++ b/internal/blocksync/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"
diff --git a/internal/blockchain/v2/routine.go b/internal/blocksync/v2/routine.go
similarity index 100%
rename from internal/blockchain/v2/routine.go
rename to internal/blocksync/v2/routine.go
diff --git a/internal/blockchain/v2/routine_test.go b/internal/blocksync/v2/routine_test.go
similarity index 100%
rename from internal/blockchain/v2/routine_test.go
rename to internal/blocksync/v2/routine_test.go
diff --git a/internal/blockchain/v2/scheduler.go b/internal/blocksync/v2/scheduler.go
similarity index 99%
rename from internal/blockchain/v2/scheduler.go
rename to internal/blocksync/v2/scheduler.go
index f884a66ed..b731d96a4 100644
--- a/internal/blockchain/v2/scheduler.go
+++ b/internal/blocksync/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
diff --git a/internal/blockchain/v2/scheduler_test.go b/internal/blocksync/v2/scheduler_test.go
similarity index 100%
rename from internal/blockchain/v2/scheduler_test.go
rename to internal/blocksync/v2/scheduler_test.go
diff --git a/internal/blockchain/v2/types.go b/internal/blocksync/v2/types.go
similarity index 100%
rename from internal/blockchain/v2/types.go
rename to internal/blocksync/v2/types.go
diff --git a/internal/consensus/metrics.go b/internal/consensus/metrics.go
index 5b4c47502..bceac4942 100644
--- 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(),
 	}
diff --git a/internal/consensus/mocks/cons_sync_reactor.go b/internal/consensus/mocks/cons_sync_reactor.go
index fcaa5696d..f21094dbb 100644
--- 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)
 }
 
diff --git a/internal/consensus/mocks/fast_sync_reactor.go b/internal/consensus/mocks/fast_sync_reactor.go
index f6a7fabbc..b7f521ff2 100644
--- 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
diff --git a/internal/consensus/reactor.go b/internal/consensus/reactor.go
index e01a6f329..4a19787c1 100644
--- 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)
 }
diff --git a/internal/consensus/reactor_test.go b/internal/consensus/reactor_test.go
index 900abc0ff..8c70ca1d5 100644
--- 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)
 	}
 
diff --git a/node/node.go b/node/node.go
index 994132b29..ced8af729 100644
--- 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 {
diff --git a/node/node_test.go b/node/node_test.go
index eca622bd3..16edb4210 100644
--- 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)
diff --git a/node/setup.go b/node/setup.go
index cd1875fb6..af48fb382 100644
--- 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{
diff --git a/proto/tendermint/blockchain/message.go b/proto/tendermint/blocksync/message.go
similarity index 99%
rename from proto/tendermint/blockchain/message.go
rename to proto/tendermint/blocksync/message.go
index 6143a64e7..d448ccc4b 100644
--- a/proto/tendermint/blockchain/message.go
+++ b/proto/tendermint/blocksync/message.go
@@ -1,4 +1,4 @@
-package blockchain
+package blocksync
 
 import (
 	"errors"
diff --git a/proto/tendermint/blockchain/message_test.go b/proto/tendermint/blocksync/message_test.go
similarity index 99%
rename from proto/tendermint/blockchain/message_test.go
rename to proto/tendermint/blocksync/message_test.go
index 37a0df217..dd1aebbd0 100644
--- a/proto/tendermint/blockchain/message_test.go
+++ b/proto/tendermint/blocksync/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"
 )
 
diff --git a/proto/tendermint/blockchain/types.pb.go b/proto/tendermint/blocksync/types.pb.go
similarity index 90%
rename from proto/tendermint/blockchain/types.pb.go
rename to proto/tendermint/blocksync/types.pb.go
index bc160b230..fcbef7107 100644
--- a/proto/tendermint/blockchain/types.pb.go
+++ b/proto/tendermint/blocksync/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")
-}
-
-func init() { proto.RegisterFile("tendermint/blockchain/types.proto", fileDescriptor_2927480384e78499) }
-
-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,
+	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/blocksync/types.proto", fileDescriptor_19b397c236e0fa07) }
+
+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) {
diff --git a/proto/tendermint/blockchain/types.proto b/proto/tendermint/blocksync/types.proto
similarity index 94%
rename from proto/tendermint/blockchain/types.proto
rename to proto/tendermint/blocksync/types.proto
index f5c143cf5..8c187c793 100644
--- a/proto/tendermint/blockchain/types.proto
+++ b/proto/tendermint/blocksync/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";
 
diff --git a/rpc/core/env.go b/rpc/core/env.go
index c18e84b51..eb7232c01 100644
--- 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
 
diff --git a/rpc/core/status.go b/rpc/core/status.go
index 9febef195..815ab37f5 100644
--- 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,
 	}
diff --git a/test/e2e/README.md b/test/e2e/README.md
index 6811b6561..d737120c1 100644
--- 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()`.
 
diff --git a/test/e2e/generator/generate.go b/test/e2e/generator/generate.go
index 1e134cf71..f699b1162 100644
--- 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
diff --git a/test/e2e/networks/ci.toml b/test/e2e/networks/ci.toml
index afce3a2db..00c73ccbd 100644
--- 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]
diff --git a/test/e2e/pkg/manifest.go b/test/e2e/pkg/manifest.go
index 89b38e02a..5711be37d 100644
--- 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"`
diff --git a/test/e2e/pkg/testnet.go b/test/e2e/pkg/testnet.go
index d54df4406..cfeb54bde 100644
--- 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":
diff --git a/test/e2e/runner/setup.go b/test/e2e/runner/setup.go
index c80d05b22..c968ef306 100644
--- 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 {
diff --git a/types/event_bus.go b/types/event_bus.go
index 5290181ee..dfe3a0664 100644
--- 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
 }
 
diff --git a/types/event_bus_test.go b/types/event_bus_test.go
index 987a10eab..9ca075391 100644
--- 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))]
diff --git a/types/events.go b/types/events.go
index 2e234d3b7..46f150abd 100644
--- 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)
 )