forked from TrueCloudLab/neoneo-go
81 lines
2.2 KiB
Go
81 lines
2.2 KiB
Go
package payload
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import (
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"encoding/binary"
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"io"
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)
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const minVersionSize = 27
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// Version payload.
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type Version struct {
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// currently the version of the protocol is 0
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Version uint32
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// currently 1
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Services uint64
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// timestamp
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Timestamp uint32
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// port this server is listening on
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Port uint16
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// it's used to distinguish the node from public IP
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Nonce uint32
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// client id
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UserAgent []byte
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// Height of the block chain
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StartHeight uint32
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// Whether to receive and forward
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Relay bool
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}
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// NewVersion returns a pointer to a Version payload.
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func NewVersion(id uint32, p uint16, ua string, h uint32, r bool) *Version {
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return &Version{
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Version: 0,
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Services: 1,
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Timestamp: 12345,
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Port: p,
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Nonce: id,
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UserAgent: []byte(ua),
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StartHeight: 0,
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Relay: r,
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}
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}
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// DecodeBinary implements the Payload interface.
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func (p *Version) DecodeBinary(r io.Reader) error {
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err := binary.Read(r, binary.LittleEndian, &p.Version)
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err = binary.Read(r, binary.LittleEndian, &p.Services)
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err = binary.Read(r, binary.LittleEndian, &p.Timestamp)
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err = binary.Read(r, binary.LittleEndian, &p.Port)
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err = binary.Read(r, binary.LittleEndian, &p.Nonce)
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var lenUA uint8
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err = binary.Read(r, binary.LittleEndian, &lenUA)
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p.UserAgent = make([]byte, lenUA)
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err = binary.Read(r, binary.LittleEndian, &p.UserAgent)
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err = binary.Read(r, binary.LittleEndian, &p.StartHeight)
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err = binary.Read(r, binary.LittleEndian, &p.Relay)
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return err
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}
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// EncodeBinary implements the Payload interface.
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func (p *Version) EncodeBinary(w io.Writer) error {
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err := binary.Write(w, binary.LittleEndian, p.Version)
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err = binary.Write(w, binary.LittleEndian, p.Services)
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err = binary.Write(w, binary.LittleEndian, p.Timestamp)
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err = binary.Write(w, binary.LittleEndian, p.Port)
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err = binary.Write(w, binary.LittleEndian, p.Nonce)
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err = binary.Write(w, binary.LittleEndian, uint8(len(p.UserAgent)))
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err = binary.Write(w, binary.LittleEndian, p.UserAgent)
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err = binary.Write(w, binary.LittleEndian, p.StartHeight)
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err = binary.Write(w, binary.LittleEndian, p.Relay)
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return err
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}
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// Size implements the payloader interface.
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func (p *Version) Size() uint32 {
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return uint32(minVersionSize + len(p.UserAgent))
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}
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