1 files changed, 0 insertions, 91 deletions
diff --git a/swarm/storage/feed/lookup/epoch.go b/swarm/storage/feed/lookup/epoch.go
deleted file mode 100644
index 6d75ba243..000000000
--- a/swarm/storage/feed/lookup/epoch.go
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2018 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package lookup
-
-import (
-	"encoding/binary"
-	"errors"
-	"fmt"
-)
-
-// Epoch represents a time slot at a particular frequency level
-type Epoch struct {
-	Time  uint64 `json:"time"`  // Time stores the time at which the update or lookup takes place
-	Level uint8  `json:"level"` // Level indicates the frequency level as the exponent of a power of 2
-}
-
-// EpochID is a unique identifier for an Epoch, based on its level and base time.
-type EpochID [8]byte
-
-// EpochLength stores the serialized binary length of an Epoch
-const EpochLength = 8
-
-// MaxTime contains the highest possible time value an Epoch can handle
-const MaxTime uint64 = (1 << 56) - 1
-
-// Base returns the base time of the Epoch
-func (e *Epoch) Base() uint64 {
-	return getBaseTime(e.Time, e.Level)
-}
-
-// ID Returns the unique identifier of this epoch
-func (e *Epoch) ID() EpochID {
-	base := e.Base()
-	var id EpochID
-	binary.LittleEndian.PutUint64(id[:], base)
-	id[7] = e.Level
-	return id
-}
-
-// MarshalBinary implements the encoding.BinaryMarshaller interface
-func (e *Epoch) MarshalBinary() (data []byte, err error) {
-	b := make([]byte, 8)
-	binary.LittleEndian.PutUint64(b[:], e.Time)
-	b[7] = e.Level
-	return b, nil
-}
-
-// UnmarshalBinary implements the encoding.BinaryUnmarshaller interface
-func (e *Epoch) UnmarshalBinary(data []byte) error {
-	if len(data) != EpochLength {
-		return errors.New("Invalid data unmarshalling Epoch")
-	}
-	b := make([]byte, 8)
-	copy(b, data)
-	e.Level = b[7]
-	b[7] = 0
-	e.Time = binary.LittleEndian.Uint64(b)
-	return nil
-}
-
-// After returns true if this epoch occurs later or exactly at the other epoch.
-func (e *Epoch) After(epoch Epoch) bool {
-	if e.Time == epoch.Time {
-		return e.Level < epoch.Level
-	}
-	return e.Time >= epoch.Time
-}
-
-// Equals compares two epochs and returns true if they refer to the same time period.
-func (e *Epoch) Equals(epoch Epoch) bool {
-	return e.Level == epoch.Level && e.Base() == epoch.Base()
-}
-
-// String implements the Stringer interface.
-func (e *Epoch) String() string {
-	return fmt.Sprintf("Epoch{Base: %d, Time:%d, Level:%d}", e.Base(), e.Time, e.Level)
-}