61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
package payload
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import (
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"io"
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"github.com/CityOfZion/neo-go/pkg/wire/command"
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"github.com/CityOfZion/neo-go/pkg/wire/util"
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)
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//GetHeadersMessage represents a GetHeaders message on the neo-network
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type GetHeadersMessage struct {
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cmd command.Type
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hashStart []util.Uint256
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hashStop util.Uint256
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}
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// NewGetHeadersMessage returns a NewGetHeaders object
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// Start contains the list of all headers you want to fetch
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// End contains the list of the highest header hash you would like to fetch
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func NewGetHeadersMessage(start []util.Uint256, stop util.Uint256) (*GetHeadersMessage, error) {
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getHeaders := &GetHeadersMessage{command.GetHeaders, start, stop}
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return getHeaders, nil
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}
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func newAbstractGetHeaders(start []util.Uint256, stop util.Uint256, cmd command.Type) (*GetHeadersMessage, error) {
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getHeaders, err := NewGetHeadersMessage(start, stop)
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if err != nil {
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return nil, err
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}
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getHeaders.cmd = cmd
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return getHeaders, nil
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}
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// DecodePayload Implements Messager interface
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func (v *GetHeadersMessage) DecodePayload(r io.Reader) error {
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br := util.BinReader{R: r}
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lenStart := br.VarUint()
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v.hashStart = make([]util.Uint256, lenStart)
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br.Read(&v.hashStart)
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br.Read(&v.hashStop)
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return br.Err
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}
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// EncodePayload Implements messager interface
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func (v *GetHeadersMessage) EncodePayload(w io.Writer) error {
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bw := &util.BinWriter{W: w}
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bw.VarUint(uint64(len(v.hashStart)))
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bw.Write(v.hashStart)
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bw.Write(v.hashStop)
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return bw.Err
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}
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// Command Implements messager interface
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func (v *GetHeadersMessage) Command() command.Type {
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return v.cmd
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}
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