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version.go
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version.go
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// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT License was not distributed with this
// file, you can obtain one at https://opensource.org/licenses/MIT.
//
// Copyright (c) DUSK NETWORK. All rights reserved.
package peer
import (
"bytes"
"time"
"github.com/dusk-network/dusk-blockchain/pkg/p2p/wire/encoding"
"github.com/dusk-network/dusk-blockchain/pkg/p2p/wire/protocol"
)
// VersionMessage is a version message on the dusk wire protocol.
type VersionMessage struct {
Version *protocol.Version
Timestamp int64
Services protocol.ServiceFlag
}
func newVersionMessageBuffer(v *protocol.Version, services protocol.ServiceFlag) (*bytes.Buffer, error) {
buffer := new(bytes.Buffer)
if err := v.Encode(buffer); err != nil {
return nil, err
}
if err := encoding.WriteUint64LE(buffer, uint64(time.Now().Unix())); err != nil {
return nil, err
}
if err := encoding.WriteUint64LE(buffer, uint64(services)); err != nil {
return nil, err
}
return buffer, nil
}
func decodeVersionMessage(r *bytes.Buffer) (*VersionMessage, error) {
versionMessage := &VersionMessage{
Version: &protocol.Version{},
}
if err := versionMessage.Version.Decode(r); err != nil {
return nil, err
}
var time uint64
if err := encoding.ReadUint64LE(r, &time); err != nil {
return nil, err
}
versionMessage.Timestamp = int64(time)
var services uint64
if err := encoding.ReadUint64LE(r, &services); err != nil {
return nil, err
}
versionMessage.Services = protocol.ServiceFlag(services)
return versionMessage, nil
}