lnd.xprv/elkrem/serdes.go

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2016-01-19 05:24:34 +03:00
package elkrem
import (
"bytes"
"encoding/binary"
"fmt"
)
//type ElkremNode struct {
// i uint64 // index (ith node)
// h uint8 // height of this node
// sha *wire.ShaHash // hash
//}
//type ElkremSender struct {
// current uint64 // last sent hash index
// treeHeight uint8 // height of tree (size is 2**height -1 )
// maxIndex uint64 // top of the tree
// root *wire.ShaHash // root hash of the tree
//}
//type ElkremReceiver struct {
// current uint64 // last received index (actually don't need it?)
// treeHeight uint8 // height of tree (size is 2**height -1 )
// s []ElkremNode // store of received hashes, max size = height
//}
// ToBytes turns an ElkremNode into a 41 byte long byte slice.
// 8 byte index, 1 byte height, 32 byte hash
func (e *ElkremNode) ToBytes() ([]byte, error) {
var buf bytes.Buffer
err := binary.Write(&buf, binary.BigEndian, e.i)
if err != nil {
return nil, err
}
err = binary.Write(&buf, binary.BigEndian, e.h)
if err != nil {
return nil, err
}
n, err := buf.Write(e.sha.Bytes())
if err != nil {
return nil, err
}
if n != 32 {
return nil, fmt.Errorf("%d byte hash, expect 32", n)
}
return buf.Bytes(), nil
}
// FromBytes turns an ElkremNode into a 41 byte long byte slice.
// 8 byte index, 1 byte height, 32 byte hash
func ElkremNodeFromBytes([]byte) (ElkremNode, error) {
var e ElkremNode
return e, nil
}
func (e *ElkremSender) ToBytes() ([]byte, error) {
return nil, nil
}
func (e *ElkremSender) FromBytes([]byte) error {
return nil
}
func (e *ElkremReceiver) ToBytes() ([]byte, error) {
return nil, nil
}
func (e *ElkremReceiver) FromBytes([]byte) error {
return nil
}