diff --git a/service/epoch.go b/service/epoch.go
deleted file mode 100644
index 2fd4381..0000000
--- a/service/epoch.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package service
-
-// EpochRequest interface gives possibility to get or set epoch in RPC Requests.
-type EpochRequest interface {
-	GetEpoch() uint64
-	SetEpoch(v uint64)
-}
diff --git a/service/meta.go b/service/meta.go
index abffdad..b41596a 100644
--- a/service/meta.go
+++ b/service/meta.go
@@ -19,14 +19,19 @@ type (
 		GetTTL() uint32
 		SetTTL(uint32)
 
-		// EpochRequest gives possibility to get or set epoch in RPC Requests.
-		GetEpoch() uint64
-		SetEpoch(uint64)
+		// EpochHeader gives possibility to get or set epoch in RPC Requests.
+		EpochHeader
 
 		// VersionHeader allows get or set version of protocol request
 		VersionHeader
 	}
 
+	// EpochHeader interface gives possibility to get or set epoch in RPC Requests.
+	EpochHeader interface {
+		GetEpoch() uint64
+		SetEpoch(v uint64)
+	}
+
 	// VersionHeader allows get or set version of protocol request
 	VersionHeader interface {
 		GetVersion() uint32