48abfdf87c
This commit modifies the existing wire.Message interface to introduce a new MessageEncoding variant which dictates the exact encoding to be used when serializing and deserializing messages. Such an option is now necessary due to the segwit soft-fork package, as btcd will need to be able to optionally encode transactions/blocks without witness data to un-upgraded peers. Two new functions have been introduced: ReadMessageWithEncodingN and WriteMessageWithEncodingN which wrap BtcDecode/BtcEncode with the desired encoding format.
60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
// Copyright (c) 2013-2015 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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"io"
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)
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// MsgMemPool implements the Message interface and represents a bitcoin mempool
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// message. It is used to request a list of transactions still in the active
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// memory pool of a relay.
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//
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// This message has no payload and was not added until protocol versions
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// starting with BIP0035Version.
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type MsgMemPool struct{}
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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 *MsgMemPool) BtcDecode(r io.Reader, pver uint32, enc MessageEncoding) error {
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if pver < BIP0035Version {
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str := fmt.Sprintf("mempool message invalid for protocol "+
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"version %d", pver)
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return messageError("MsgMemPool.BtcDecode", str)
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}
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return nil
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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 *MsgMemPool) BtcEncode(w io.Writer, pver uint32, enc MessageEncoding) error {
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if pver < BIP0035Version {
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str := fmt.Sprintf("mempool message invalid for protocol "+
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"version %d", pver)
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return messageError("MsgMemPool.BtcEncode", str)
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}
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return nil
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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 *MsgMemPool) Command() string {
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return CmdMemPool
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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 *MsgMemPool) MaxPayloadLength(pver uint32) uint32 {
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return 0
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}
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// NewMsgMemPool returns a new bitcoin pong message that conforms to the Message
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// interface. See MsgPong for details.
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func NewMsgMemPool() *MsgMemPool {
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return &MsgMemPool{}
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}
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