diff --git a/cmd/u2u/launcher/config.go b/cmd/u2u/launcher/config.go
index 8809937..4107fc2 100644
--- a/cmd/u2u/launcher/config.go
+++ b/cmd/u2u/launcher/config.go
@@ -175,26 +175,26 @@ var tomlSettings = toml.Config{
 }
 
 type config struct {
-	Node           node.Config
-	U2U            gossip.Config
-	Emitter        emitter.Config
-	TxPool         evmcore.TxPoolConfig
-	U2UStore       gossip.StoreConfig
-	Hashgraph      consensus.Config
-	HashgraphStore consensus.StoreConfig
-	VectorClock    vecmt.IndexConfig
-	DBs            integration.DBsConfig
-	Monitoring     monitoring.Config
+	Node        node.Config
+	U2U         gossip.Config
+	Emitter     emitter.Config
+	TxPool      evmcore.TxPoolConfig
+	U2UStore    gossip.StoreConfig
+	Helios      consensus.Config
+	HeliosStore consensus.StoreConfig
+	VectorClock vecmt.IndexConfig
+	DBs         integration.DBsConfig
+	Monitoring  monitoring.Config
 }
 
 func (c *config) AppConfigs() integration.Configs {
 	return integration.Configs{
-		U2U:            c.U2U,
-		U2UStore:       c.U2UStore,
-		Hashgraph:      c.Hashgraph,
-		HashgraphStore: c.HashgraphStore,
-		VectorClock:    c.VectorClock,
-		DBs:            c.DBs,
+		U2U:         c.U2U,
+		U2UStore:    c.U2UStore,
+		Helios:      c.Helios,
+		HeliosStore: c.HeliosStore,
+		VectorClock: c.VectorClock,
+		DBs:         c.DBs,
 	}
 }
 
@@ -495,14 +495,14 @@ func mayMakeAllConfigs(ctx *cli.Context) (*config, error) {
 	// Defaults (low priority)
 	cacheRatio := cacheScaler(ctx)
 	cfg := config{
-		Node:           defaultNodeConfig(),
-		U2U:            gossip.DefaultConfig(cacheRatio),
-		Emitter:        emitter.DefaultConfig(),
-		TxPool:         evmcore.DefaultTxPoolConfig,
-		U2UStore:       gossip.DefaultStoreConfig(cacheRatio),
-		Hashgraph:      consensus.DefaultConfig(),
-		HashgraphStore: consensus.DefaultStoreConfig(cacheRatio),
-		VectorClock:    vecmt.DefaultConfig(cacheRatio),
+		Node:        defaultNodeConfig(),
+		U2U:         gossip.DefaultConfig(cacheRatio),
+		Emitter:     emitter.DefaultConfig(),
+		TxPool:      evmcore.DefaultTxPoolConfig,
+		U2UStore:    gossip.DefaultStoreConfig(cacheRatio),
+		Helios:      consensus.DefaultConfig(),
+		HeliosStore: consensus.DefaultStoreConfig(cacheRatio),
+		VectorClock: vecmt.DefaultConfig(cacheRatio),
 	}
 
 	if ctx.GlobalIsSet(FakeNetFlag.Name) {
diff --git a/cmd/u2u/launcher/config_custom_test.go b/cmd/u2u/launcher/config_custom_test.go
index d3dc02b..938b732 100644
--- a/cmd/u2u/launcher/config_custom_test.go
+++ b/cmd/u2u/launcher/config_custom_test.go
@@ -22,14 +22,14 @@ func TestConfigFile(t *testing.T) {
 	}
 
 	src := config{
-		Node:           defaultNodeConfig(),
-		U2U:            gossip.DefaultConfig(cacheRatio),
-		Emitter:        emitter.DefaultConfig(),
-		TxPool:         evmcore.DefaultTxPoolConfig,
-		U2UStore:       gossip.DefaultStoreConfig(cacheRatio),
-		Hashgraph:      consensus.DefaultConfig(),
-		HashgraphStore: consensus.DefaultStoreConfig(cacheRatio),
-		VectorClock:    vecmt.DefaultConfig(cacheRatio),
+		Node:        defaultNodeConfig(),
+		U2U:         gossip.DefaultConfig(cacheRatio),
+		Emitter:     emitter.DefaultConfig(),
+		TxPool:      evmcore.DefaultTxPoolConfig,
+		U2UStore:    gossip.DefaultStoreConfig(cacheRatio),
+		Helios:      consensus.DefaultConfig(),
+		HeliosStore: consensus.DefaultStoreConfig(cacheRatio),
+		VectorClock: vecmt.DefaultConfig(cacheRatio),
 	}
 
 	canonical := func(nn []*enode.Node) []*enode.Node {
diff --git a/cmd/u2u/launcher/consolecmd_test.go b/cmd/u2u/launcher/consolecmd_test.go
index 63b4396..8d4166c 100644
--- a/cmd/u2u/launcher/consolecmd_test.go
+++ b/cmd/u2u/launcher/consolecmd_test.go
@@ -39,7 +39,7 @@ func TestConsoleWelcome(t *testing.T) {
 
 	// Verify the actual welcome message to the required template
 	cli.Expect(`
-Welcome to the Hashgraph JavaScript console!
+Welcome to the Helios JavaScript console!
 
 instance: go-u2u/v{{version}}/{{goos}}-{{goarch}}/{{gover}}
 coinbase: {{.Coinbase}}
@@ -58,7 +58,7 @@ func TestIPCAttachWelcome(t *testing.T) {
 	// Configure the instance for IPC attachement
 	var ipc string
 	if runtime.GOOS == "windows" {
-		ipc = `\\.\pipe\hashgraph.ipc`
+		ipc = `\\.\pipe\helios.ipc`
 	} else {
 		ws := tmpdir(t)
 		defer os.RemoveAll(ws)
@@ -121,7 +121,7 @@ func testAttachWelcome(t *testing.T, cli *testcli, endpoint, apis string) {
 
 	// Verify the actual welcome message to the required template
 	attach.Expect(`
-Welcome to the Hashgraph JavaScript console!
+Welcome to the Helios JavaScript console!
 
 instance: go-u2u/v{{version}}/{{goos}}-{{goarch}}/{{gover}}
 coinbase: {{coinbase}}
diff --git a/cmd/u2u/launcher/fake_test.go b/cmd/u2u/launcher/fake_test.go
index 183f9c1..0d2a62c 100644
--- a/cmd/u2u/launcher/fake_test.go
+++ b/cmd/u2u/launcher/fake_test.go
@@ -33,7 +33,7 @@ func TestFakeNetFlag_NonValidator(t *testing.T) {
 
 	// Verify the actual welcome message to the required template
 	cli.Expect(`
-Welcome to the Hashgraph JavaScript console!
+Welcome to the Helios JavaScript console!
 
 instance: go-u2u/v{{version}}/{{goos}}-{{goarch}}/{{gover}}
 coinbase: {{.Coinbase}}
@@ -77,7 +77,7 @@ func TestFakeNetFlag_Validator(t *testing.T) {
 
 	// Verify the actual welcome message to the required template
 	cli.Expect(`
-Welcome to the Hashgraph JavaScript console!
+Welcome to the Helios JavaScript console!
 
 instance: go-u2u/v{{version}}/{{goos}}-{{goarch}}/{{gover}}
 coinbase: {{.Coinbase}}
diff --git a/cmd/u2u/launcher/fixdirty.go b/cmd/u2u/launcher/fixdirty.go
index 59ee629..d543e8a 100644
--- a/cmd/u2u/launcher/fixdirty.go
+++ b/cmd/u2u/launcher/fixdirty.go
@@ -57,12 +57,12 @@ func healDirty(ctx *cli.Context) error {
 	}
 
 	// prepare consensus database from epochState
-	log.Info("Recreating hashgraph DB")
+	log.Info("Recreating helios DB")
 	cMainDb := mustOpenDB(multiProducer, "hashgraph")
 	cGetEpochDB := func(epoch idx.Epoch) u2udb.Store {
 		return mustOpenDB(multiProducer, fmt.Sprintf("hashgraph-%d", epoch))
 	}
-	cdb := consensus.NewStore(cMainDb, cGetEpochDB, panics("hashgraph store"), cfg.HashgraphStore)
+	cdb := consensus.NewStore(cMainDb, cGetEpochDB, panics("helios store"), cfg.HeliosStore)
 	err = cdb.ApplyGenesis(&consensus.Genesis{
 		Epoch:      epochState.Epoch,
 		Validators: epochState.Validators,
diff --git a/cmd/u2u/launcher/launcher.go b/cmd/u2u/launcher/launcher.go
index b880bf9..92aa532 100644
--- a/cmd/u2u/launcher/launcher.go
+++ b/cmd/u2u/launcher/launcher.go
@@ -186,7 +186,7 @@ func init() {
 
 	// App.
 
-	app.Action = hashgraphMain
+	app.Action = heliosMain
 	app.Version = params.VersionWithCommit(gitCommit, gitDate)
 	app.HideVersion = true // we have a command to print the version
 	app.Commands = []cli.Command{
@@ -251,7 +251,7 @@ func Launch(args []string) error {
 // u2u is the main entry point into the system if no special subcommand is ran.
 // It creates a default node based on the command line arguments and runs it in
 // blocking mode, waiting for it to be shut down.
-func hashgraphMain(ctx *cli.Context) error {
+func heliosMain(ctx *cli.Context) error {
 	if args := ctx.Args(); len(args) > 0 {
 		return fmt.Errorf("invalid command: %q", args[0])
 	}
diff --git a/console/console.go b/console/console.go
index dfdfc9b..3c7e61b 100644
--- a/console/console.go
+++ b/console/console.go
@@ -298,7 +298,7 @@ func (c *Console) AutoCompleteInput(line string, pos int) (string, []string, str
 // Welcome shows summary of current u2u instance and some metadata about the
 // console's available modules.
 func (c *Console) Welcome() {
-	message := "Welcome to the Hashgraph JavaScript console!\n\n"
+	message := "Welcome to the Helios JavaScript console!\n\n"
 
 	// Print some generic u2u metadata
 	res, err := c.jsre.Run(`
diff --git a/ethapi/api.go b/ethapi/api.go
index 0e1b59d..eef23aa 100644
--- a/ethapi/api.go
+++ b/ethapi/api.go
@@ -2537,7 +2537,7 @@ func (api *PrivateDebugAPI) ChaindbCompact() error {
 
 // SetHead rewinds the head of the blockchain to a previous block.
 func (api *PrivateDebugAPI) SetHead(number hexutil.Uint64) error {
-	return errors.New("hashgraph cannot rewind blocks due to the BFT algorithm")
+	return errors.New("helios cannot rewind blocks due to the BFT algorithm")
 }
 
 // PublicNetAPI offers network related RPC methods
diff --git a/ethapi/backend.go b/ethapi/backend.go
index 2a290e4..dca5fbd 100644
--- a/ethapi/backend.go
+++ b/ethapi/backend.go
@@ -99,14 +99,14 @@ type Backend interface {
 	ChainConfig() *params.ChainConfig
 	CurrentBlock() *evmcore.EvmBlock
 
-	// Hashgraph DAG API
+	// Helios DAG API
 	GetEventPayload(ctx context.Context, shortEventID string) (*native.EventPayload, error)
 	GetEvent(ctx context.Context, shortEventID string) (*native.Event, error)
 	GetHeads(ctx context.Context, epoch rpc.BlockNumber) (hash.Events, error)
 	CurrentEpoch(ctx context.Context) idx.Epoch
 	SealedEpochTiming(ctx context.Context) (start native.Timestamp, end native.Timestamp)
 
-	// Hashgraph aBFT API
+	// Helios aBFT API
 	GetEpochBlockState(ctx context.Context, epoch rpc.BlockNumber) (*iblockproc.BlockState, *iblockproc.EpochState, error)
 	GetDowntime(ctx context.Context, vid idx.ValidatorID) (idx.Block, native.Timestamp, error)
 	GetUptime(ctx context.Context, vid idx.ValidatorID) (*big.Int, error)
diff --git a/ethapi/dag_api.go b/ethapi/dag_api.go
index 61aa217..043b64e 100644
--- a/ethapi/dag_api.go
+++ b/ethapi/dag_api.go
@@ -24,7 +24,7 @@ func NewPublicDAGChainAPI(b Backend) *PublicDAGChainAPI {
 	return &PublicDAGChainAPI{b}
 }
 
-// GetEvent returns the Hashgraph event header by hash or short ID.
+// GetEvent returns the Helios event header by hash or short ID.
 func (s *PublicDAGChainAPI) GetEvent(ctx context.Context, shortEventID string) (map[string]interface{}, error) {
 	header, err := s.b.GetEvent(ctx, shortEventID)
 	if err != nil {
@@ -36,7 +36,7 @@ func (s *PublicDAGChainAPI) GetEvent(ctx context.Context, shortEventID string) (
 	return native.RPCMarshalEvent(header), nil
 }
 
-// GetEventPayload returns Hashgraph event by hash or short ID.
+// GetEventPayload returns Helios event by hash or short ID.
 func (s *PublicDAGChainAPI) GetEventPayload(ctx context.Context, shortEventID string, inclTx bool) (map[string]interface{}, error) {
 	event, err := s.b.GetEventPayload(ctx, shortEventID)
 	if err != nil {
diff --git a/evmcore/dummy_block.go b/evmcore/dummy_block.go
index dd63151..c520dde 100644
--- a/evmcore/dummy_block.go
+++ b/evmcore/dummy_block.go
@@ -87,7 +87,7 @@ func ToEvmHeader(block *native.Block, index idx.Block, prevHash hash.Event, rule
 	}
 }
 
-// ConvertFromEthHeader converts ETH-formatted header to Hashgraph EVM header
+// ConvertFromEthHeader converts ETH-formatted header to Helios EVM header
 func ConvertFromEthHeader(h *types.Header) *EvmHeader {
 	// NOTE: incomplete conversion
 	return &EvmHeader{
diff --git a/gossip/common_test.go b/gossip/common_test.go
index deb3942..2c8a014 100644
--- a/gossip/common_test.go
+++ b/gossip/common_test.go
@@ -89,7 +89,7 @@ func makeTestEngine(gdb *Store) (*consensus.Consensus, *vecmt.Index) {
 		Validators: gdb.GetValidators(),
 	})
 	vecClock := vecmt.NewIndex(panics("Vector clock"), vecmt.LiteConfig())
-	engine := consensus.NewConsensus(cdb, &testGossipStoreAdapter{gdb}, vecmt2dagidx.Wrap(vecClock), panics("Hashgraph"), consensus.LiteConfig())
+	engine := consensus.NewConsensus(cdb, &testGossipStoreAdapter{gdb}, vecmt2dagidx.Wrap(vecClock), panics("Helios"), consensus.LiteConfig())
 	return engine, vecClock
 }
 
diff --git a/gossip/ethapi_backend.go b/gossip/ethapi_backend.go
index 1970624..c9c8049 100644
--- a/gossip/ethapi_backend.go
+++ b/gossip/ethapi_backend.go
@@ -202,7 +202,7 @@ func (b *EthAPIBackend) GetFullEventID(shortEventID string) (hash.Event, error)
 	return options[0], nil
 }
 
-// GetEventPayload returns Hashgraph event by hash or short ID.
+// GetEventPayload returns Helios event by hash or short ID.
 func (b *EthAPIBackend) GetEventPayload(ctx context.Context, shortEventID string) (*native.EventPayload, error) {
 	id, err := b.GetFullEventID(shortEventID)
 	if err != nil {
@@ -211,7 +211,7 @@ func (b *EthAPIBackend) GetEventPayload(ctx context.Context, shortEventID string
 	return b.svc.store.GetEventPayload(id), nil
 }
 
-// GetEvent returns the Hashgraph event header by hash or short ID.
+// GetEvent returns the Helios event header by hash or short ID.
 func (b *EthAPIBackend) GetEvent(ctx context.Context, shortEventID string) (*native.Event, error) {
 	id, err := b.GetFullEventID(shortEventID)
 	if err != nil {
diff --git a/integration/assembly.go b/integration/assembly.go
index b226d27..b928091 100644
--- a/integration/assembly.go
+++ b/integration/assembly.go
@@ -45,12 +45,12 @@ func (e *GenesisMismatchError) Error() string {
 }
 
 type Configs struct {
-	U2U            gossip.Config
-	U2UStore       gossip.StoreConfig
-	Hashgraph      consensus.Config
-	HashgraphStore consensus.StoreConfig
-	VectorClock    vecmt.IndexConfig
-	DBs            DBsConfig
+	U2U         gossip.Config
+	U2UStore    gossip.StoreConfig
+	Helios      consensus.Config
+	HeliosStore consensus.StoreConfig
+	VectorClock vecmt.IndexConfig
+	DBs         DBsConfig
 }
 
 func panics(name string) func(error) {
@@ -74,7 +74,7 @@ func getStores(producer u2udb.FlushableDBProducer, cfg Configs) (*gossip.Store,
 	cGetEpochDB := func(epoch idx.Epoch) u2udb.Store {
 		return mustOpenDB(producer, fmt.Sprintf("hashgraph-%d", epoch))
 	}
-	cdb := consensus.NewStore(cMainDb, cGetEpochDB, panics("Hashgraph store"), cfg.HashgraphStore)
+	cdb := consensus.NewStore(cMainDb, cGetEpochDB, panics("Helios store"), cfg.HeliosStore)
 	return gdb, cdb
 }
 
@@ -103,13 +103,13 @@ func rawMakeEngine(gdb *gossip.Store, cdb *consensus.Store, g *genesis.Genesis,
 			Validators: gdb.GetValidators(),
 		})
 		if err != nil {
-			return nil, nil, blockProc, fmt.Errorf("failed to write Hashgraph genesis state: %v", err)
+			return nil, nil, blockProc, fmt.Errorf("failed to write Helios genesis state: %v", err)
 		}
 	}
 
 	// create consensus
 	vecClock := vecmt.NewIndex(panics("Vector clock"), cfg.VectorClock)
-	engine := consensus.NewConsensus(cdb, &GossipStoreAdapter{gdb}, vecmt2dagidx.Wrap(vecClock), panics("Hashgraph"), cfg.Hashgraph)
+	engine := consensus.NewConsensus(cdb, &GossipStoreAdapter{gdb}, vecmt2dagidx.Wrap(vecClock), panics("Helios"), cfg.Helios)
 	return engine, vecClock, blockProc, nil
 }
 
diff --git a/integration/bench_db_flush_test.go b/integration/bench_db_flush_test.go
index 3eadbe2..d6d8767 100644
--- a/integration/bench_db_flush_test.go
+++ b/integration/bench_db_flush_test.go
@@ -24,12 +24,12 @@ func BenchmarkFlushDBs(b *testing.B) {
 	genStore := makefakegenesis.FakeGenesisStore(1, utils.ToU2U(1), utils.ToU2U(1))
 	g := genStore.Genesis()
 	_, _, store, s2, _, closeDBs := MakeEngine(dir, &g, Configs{
-		U2U:            gossip.DefaultConfig(cachescale.Identity),
-		U2UStore:       gossip.DefaultStoreConfig(cachescale.Identity),
-		Hashgraph:      consensus.DefaultConfig(),
-		HashgraphStore: consensus.DefaultStoreConfig(cachescale.Identity),
-		VectorClock:    vecmt.DefaultConfig(cachescale.Identity),
-		DBs:            DefaultDBsConfig(cachescale.Identity.U64, 512),
+		U2U:         gossip.DefaultConfig(cachescale.Identity),
+		U2UStore:    gossip.DefaultStoreConfig(cachescale.Identity),
+		Helios:      consensus.DefaultConfig(),
+		HeliosStore: consensus.DefaultStoreConfig(cachescale.Identity),
+		VectorClock: vecmt.DefaultConfig(cachescale.Identity),
+		DBs:         DefaultDBsConfig(cachescale.Identity.U64, 512),
 	})
 	defer closeDBs()
 	defer store.Close()
diff --git a/integration/metric_test.go b/integration/metric_test.go
index a8f849d..f200e3e 100644
--- a/integration/metric_test.go
+++ b/integration/metric_test.go
@@ -10,15 +10,15 @@ func TestGenericNameOfTmpDB(t *testing.T) {
 	require := require.New(t)
 
 	for name, exp := range map[string]string{
-		"":               "",
-		"main":           "main",
-		"main-single":    "main-single",
-		"hashgraph-0":    "hashgraph-tmp",
-		"hashgraph-0999": "hashgraph-tmp",
-		"gossip-50":      "gossip-tmp",
-		"epoch-1":        "epoch-tmp",
-		"xxx-1a":         "xxx-1a",
-		"123":            "123",
+		"":            "",
+		"main":        "main",
+		"main-single": "main-single",
+		"helios-0":    "helios-tmp",
+		"helios-0999": "helios-tmp",
+		"gossip-50":   "gossip-tmp",
+		"epoch-1":     "epoch-tmp",
+		"xxx-1a":      "xxx-1a",
+		"123":         "123",
 	} {
 		got := genericNameOfTmpDB(name)
 		require.Equal(exp, got, name)
diff --git a/native/client/dag_api.go b/native/client/dag_api.go
index 3fe8756..a802591 100644
--- a/native/client/dag_api.go
+++ b/native/client/dag_api.go
@@ -12,7 +12,7 @@ import (
 	"github.com/unicornultrafoundation/go-u2u/native"
 )
 
-// GetEvent returns Hashgraph event by hash or short ID.
+// GetEvent returns Helios event by hash or short ID.
 func (ec *Client) GetEvent(ctx context.Context, h hash.Event) (e native.EventI, err error) {
 	var raw map[string]interface{}
 	err = ec.c.CallContext(ctx, &raw, "dag_getEvent", h.Hex())
@@ -27,7 +27,7 @@ func (ec *Client) GetEvent(ctx context.Context, h hash.Event) (e native.EventI,
 	return
 }
 
-// GetEvent returns Hashgraph event by hash or short ID.
+// GetEvent returns Helios event by hash or short ID.
 func (ec *Client) GetEventPayload(ctx context.Context, h hash.Event, inclTx bool) (e native.EventI, txs []common.Hash, err error) {
 	var raw map[string]interface{}
 	err = ec.c.CallContext(ctx, &raw, "dag_getEventPayload", h.Hex(), inclTx)
diff --git a/u2u/rules.go b/u2u/rules.go
index de86d76..b5c5d7e 100644
--- a/u2u/rules.go
+++ b/u2u/rules.go
@@ -80,7 +80,7 @@ type EpochsRules struct {
 	MaxEpochDuration native.Timestamp
 }
 
-// DagRules of Hashgraph DAG (directed acyclic graph).
+// DagRules of Helios DAG (directed acyclic graph).
 type DagRules struct {
 	MaxParents     idx.Event
 	MaxFreeParents idx.Event // maximum number of parents with no gas cost