63 lines
1.9 KiB
Go
63 lines
1.9 KiB
Go
// Copyright (c) 2017 The btcsuite developers
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package wire
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import (
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"fmt"
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"github.com/btcsuite/fastsha256"
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"io"
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)
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const (
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// MaxCFilterHeaderDataSize is the maximum byte size of a committed
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// filter header.
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MaxCFilterHeaderDataSize = fastsha256.Size
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)
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type MsgCFilterHeader struct {
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Data []byte
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}
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// BtcDecode decodes r using the bitcoin protocol encoding into the receiver.
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// This is part of the Message interface implementation.
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func (msg *MsgCFilterHeader) BtcDecode(r io.Reader, pver uint32) error {
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var err error
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msg.Data, err = ReadVarBytes(r, pver, MaxCFilterHeaderDataSize,
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"cf header data")
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return err
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}
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// BtcEncode encodes the receiver to w using the bitcoin protocol encoding.
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// This is part of the Message interface implementation.
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func (msg *MsgCFilterHeader) BtcEncode(w io.Writer, pver uint32) error {
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size := len(msg.Data)
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if size > MaxCFilterHeaderDataSize {
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str := fmt.Sprintf("cf header size too large for message " +
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"[size %v, max %v]", size, MaxCFilterHeaderDataSize)
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return messageError("MsgCFilterHeader.BtcEncode", str)
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}
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return WriteVarBytes(w, pver, msg.Data)
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}
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// Command returns the protocol command string for the message. This is part
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// of the Message interface implementation.
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func (msg *MsgCFilterHeader) Command() string {
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return CmdCFilterHeader
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}
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// MaxPayloadLength returns the maximum length the payload can be for the
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// receiver. This is part of the Message interface implementation.
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func (msg *MsgCFilterHeader) MaxPayloadLength(pver uint32) uint32 {
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return uint32(VarIntSerializeSize(MaxCFilterHeaderDataSize)) +
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MaxCFilterHeaderDataSize
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}
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// NewMsgFilterAdd returns a new bitcoin cfilterheader message that conforms to
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// the Message interface. See MsgCFilterHeader for details.
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func NewMsgCFilterHeader(data []byte) *MsgCFilterHeader {
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return &MsgCFilterHeader{
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Data: data,
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}
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}
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