neoneo-go/pkg/network/payload/inventory.go
2018-01-28 08:05:35 +01:00

63 lines
1.5 KiB
Go

package payload
import (
"bytes"
"encoding/binary"
. "github.com/anthdm/neo-go/pkg/util"
)
// The node can broadcast the object information it owns by this message.
// The message can be sent automatically or can be used to answer getbloks messages.
// InventoryType is the type of an object in the Inventory message.
type InventoryType uint8
// String implements the Stringer interface.
func (i InventoryType) String() string {
switch i {
case 0x01:
return "block"
case 0x02:
return "TX"
case 0xe0:
return "consensus"
default:
return "unknown inventory type"
}
}
// List of valid InventoryTypes.
const (
BlockType InventoryType = 0x01 // 1
TXType = 0x02 // 2
ConsensusType = 0xe0 // 224
)
// Inventory payload
type Inventory struct {
// Type if the object hash.
Type InventoryType
// The hash of the object (uint256).
Hash Uint256
}
// UnmarshalBinary implements the Payloader interface.
func (p *Inventory) UnmarshalBinary(b []byte) error {
// TODO: what byte is [1:2] ?
// We have 1 byte for the type which is uint8 and 32 for the hash.
// There is 1 byte left over.
binary.Read(bytes.NewReader(b), binary.LittleEndian, &p.Type)
p.Hash.UnmarshalBinary(b[2:len(b)])
return nil
}
// MarshalBinary implements the Payloader interface.
func (p *Inventory) MarshalBinary() ([]byte, error) {
return nil, nil
}
// Size implements the Payloader interface.
func (p *Inventory) Size() uint32 {
return 1 + 1 + 32 // ?
}