77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
package payload
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import (
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"github.com/CityOfZion/neo-go/pkg/io"
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"github.com/CityOfZion/neo-go/pkg/util"
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)
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// The node can broadcast the object information it owns by this message.
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// The message can be sent automatically or can be used to answer getblock messages.
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// InventoryType is the type of an object in the Inventory message.
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type InventoryType uint8
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// String implements the Stringer interface.
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func (i InventoryType) String() string {
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switch i {
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case 0x01:
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return "TX"
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case 0x02:
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return "block"
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case 0xe0:
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return "consensus"
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default:
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return "unknown inventory type"
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}
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}
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// Valid returns true if the inventory (type) is known.
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func (i InventoryType) Valid() bool {
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return i == BlockType || i == TXType || i == ConsensusType
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}
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// List of valid InventoryTypes.
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const (
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TXType InventoryType = 0x01 // 1
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BlockType InventoryType = 0x02 // 2
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ConsensusType InventoryType = 0xe0 // 224
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)
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// Inventory payload
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type Inventory struct {
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// Type if the object hash.
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Type InventoryType
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// A list of hashes.
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Hashes []util.Uint256
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}
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// NewInventory return a pointer to an Inventory.
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func NewInventory(typ InventoryType, hashes []util.Uint256) *Inventory {
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return &Inventory{
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Type: typ,
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Hashes: hashes,
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}
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}
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// DecodeBinary implements Serializable interface.
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func (p *Inventory) DecodeBinary(br *io.BinReader) {
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br.ReadLE(&p.Type)
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listLen := br.ReadVarUint()
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p.Hashes = make([]util.Uint256, listLen)
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for i := 0; i < int(listLen); i++ {
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br.ReadLE(&p.Hashes[i])
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}
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}
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// EncodeBinary implements Serializable interface.
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func (p *Inventory) EncodeBinary(bw *io.BinWriter) {
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bw.WriteLE(p.Type)
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listLen := len(p.Hashes)
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bw.WriteVarUint(uint64(listLen))
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for i := 0; i < listLen; i++ {
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bw.WriteLE(p.Hashes[i])
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}
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}
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