neoneo-go/pkg/network/payload/version.go
Anthony De Meulemeester 046494dd68
Implemented processing headers + added leveldb as a dependency. (#16)
* Implemented processing headers + added leveldb as a dependency.

* version 0.7.0

* put glide get and install in build_cli section
2018-02-06 07:43:32 +01:00

82 lines
2.2 KiB
Go

package payload
import (
"encoding/binary"
"io"
"time"
)
const minVersionSize = 27
// Version payload.
type Version struct {
// currently the version of the protocol is 0
Version uint32
// currently 1
Services uint64
// timestamp
Timestamp uint32
// port this server is listening on
Port uint16
// it's used to distinguish the node from public IP
Nonce uint32
// client id
UserAgent []byte
// Height of the block chain
StartHeight uint32
// Whether to receive and forward
Relay bool
}
// NewVersion returns a pointer to a Version payload.
func NewVersion(id uint32, p uint16, ua string, h uint32, r bool) *Version {
return &Version{
Version: 0,
Services: 1,
Timestamp: uint32(time.Now().UTC().Unix()),
Port: p,
Nonce: id,
UserAgent: []byte(ua),
StartHeight: h,
Relay: r,
}
}
// DecodeBinary implements the Payload interface.
func (p *Version) DecodeBinary(r io.Reader) error {
err := binary.Read(r, binary.LittleEndian, &p.Version)
err = binary.Read(r, binary.LittleEndian, &p.Services)
err = binary.Read(r, binary.LittleEndian, &p.Timestamp)
err = binary.Read(r, binary.LittleEndian, &p.Port)
err = binary.Read(r, binary.LittleEndian, &p.Nonce)
var lenUA uint8
err = binary.Read(r, binary.LittleEndian, &lenUA)
p.UserAgent = make([]byte, lenUA)
err = binary.Read(r, binary.LittleEndian, &p.UserAgent)
err = binary.Read(r, binary.LittleEndian, &p.StartHeight)
err = binary.Read(r, binary.LittleEndian, &p.Relay)
return err
}
// EncodeBinary implements the Payload interface.
func (p *Version) EncodeBinary(w io.Writer) error {
err := binary.Write(w, binary.LittleEndian, p.Version)
err = binary.Write(w, binary.LittleEndian, p.Services)
err = binary.Write(w, binary.LittleEndian, p.Timestamp)
err = binary.Write(w, binary.LittleEndian, p.Port)
err = binary.Write(w, binary.LittleEndian, p.Nonce)
err = binary.Write(w, binary.LittleEndian, uint8(len(p.UserAgent)))
err = binary.Write(w, binary.LittleEndian, p.UserAgent)
err = binary.Write(w, binary.LittleEndian, p.StartHeight)
err = binary.Write(w, binary.LittleEndian, p.Relay)
return err
}
// Size implements the payloader interface.
func (p *Version) Size() uint32 {
return uint32(minVersionSize + len(p.UserAgent))
}