neoneo-go/pkg/network/payload/headers.go

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package payload
import (
"github.com/CityOfZion/neo-go/pkg/core"
"github.com/CityOfZion/neo-go/pkg/io"
log "github.com/sirupsen/logrus"
)
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// Headers payload.
type Headers struct {
Hdrs []*core.Header
}
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// Users can at most request 2k header.
const (
maxHeadersAllowed = 2000
)
// DecodeBinary implements Serializable interface.
func (p *Headers) DecodeBinary(br *io.BinReader) {
lenHeaders := br.ReadVarUint()
// C# node does it silently
if lenHeaders > maxHeadersAllowed {
log.Warnf("received %d headers, capping to %d", lenHeaders, maxHeadersAllowed)
lenHeaders = maxHeadersAllowed
}
p.Hdrs = make([]*core.Header, lenHeaders)
for i := 0; i < int(lenHeaders); i++ {
header := &core.Header{}
header.DecodeBinary(br)
p.Hdrs[i] = header
}
}
// EncodeBinary implements Serializable interface.
func (p *Headers) EncodeBinary(bw *io.BinWriter) {
bw.WriteArray(p.Hdrs)
}