neo-go/pkg/network/payload/getblocks.go
2020-05-22 17:33:59 +03:00

44 lines
983 B
Go

package payload
import (
"errors"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/nspcc-dev/neo-go/pkg/util"
)
// Maximum inventory hashes number is limited to 500.
const (
MaxHashesCount = 500
)
// GetBlocks contains fields and methods to be shared with the
type GetBlocks struct {
// hash of latest block that node requests
HashStart util.Uint256
Count int16
}
// NewGetBlocks returns a pointer to a GetBlocks object.
func NewGetBlocks(start util.Uint256, count int16) *GetBlocks {
return &GetBlocks{
HashStart: start,
Count: count,
}
}
// DecodeBinary implements Serializable interface.
func (p *GetBlocks) DecodeBinary(br *io.BinReader) {
p.HashStart.DecodeBinary(br)
p.Count = int16(br.ReadU16LE())
if p.Count < -1 || p.Count == 0 {
br.Err = errors.New("invalid count")
}
}
// EncodeBinary implements Serializable interface.
func (p *GetBlocks) EncodeBinary(bw *io.BinWriter) {
p.HashStart.EncodeBinary(bw)
bw.WriteU16LE(uint16(p.Count))
}