1 files changed, 44 insertions, 0 deletions
diff --git a/swarm/storage/feed/binaryserializer.go b/swarm/storage/feed/binaryserializer.go
new file mode 100644
index 000000000..4e4f67a09
--- /dev/null
+++ b/swarm/storage/feed/binaryserializer.go
@@ -0,0 +1,44 @@
+// 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 feed
+
+import "github.com/ethereum/go-ethereum/common/hexutil"
+
+type binarySerializer interface {
+	binaryPut(serializedData []byte) error
+	binaryLength() int
+	binaryGet(serializedData []byte) error
+}
+
+// Values interface represents a string key-value store
+// useful for building query strings
+type Values interface {
+	Get(key string) string
+	Set(key, value string)
+}
+
+type valueSerializer interface {
+	FromValues(values Values) error
+	AppendValues(values Values)
+}
+
+// Hex serializes the structure and converts it to a hex string
+func Hex(bin binarySerializer) string {
+	b := make([]byte, bin.binaryLength())
+	bin.binaryPut(b)
+	return hexutil.Encode(b)
+}