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60 lines
1.5 KiB
Go
60 lines
1.5 KiB
Go
package payload
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import (
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"time"
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"github.com/nspcc-dev/neo-go/pkg/config/netmode"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/network/capability"
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)
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// MaxUserAgentLength is the limit for user agent field.
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const MaxUserAgentLength = 1024
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// Version payload.
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type Version struct {
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// NetMode of the node
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Magic netmode.Magic
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// currently the version of the protocol is 0
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Version uint32
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// timestamp
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Timestamp uint32
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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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// List of available network services
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Capabilities capability.Capabilities
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}
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// NewVersion returns a pointer to a Version payload.
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func NewVersion(magic netmode.Magic, id uint32, ua string, c []capability.Capability) *Version {
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return &Version{
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Magic: magic,
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Version: 0,
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Timestamp: uint32(time.Now().UTC().Unix()),
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Nonce: id,
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UserAgent: []byte(ua),
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Capabilities: c,
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}
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}
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// DecodeBinary implements Serializable interface.
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func (p *Version) DecodeBinary(br *io.BinReader) {
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p.Magic = netmode.Magic(br.ReadU32LE())
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p.Version = br.ReadU32LE()
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p.Timestamp = br.ReadU32LE()
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p.Nonce = br.ReadU32LE()
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p.UserAgent = br.ReadVarBytes(MaxUserAgentLength)
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p.Capabilities.DecodeBinary(br)
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}
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// EncodeBinary implements Serializable interface.
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func (p *Version) EncodeBinary(bw *io.BinWriter) {
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bw.WriteU32LE(uint32(p.Magic))
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bw.WriteU32LE(p.Version)
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bw.WriteU32LE(p.Timestamp)
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bw.WriteU32LE(p.Nonce)
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bw.WriteVarBytes(p.UserAgent)
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p.Capabilities.EncodeBinary(bw)
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}
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