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BIP0144+wire: add a MessageEncoding variant for serialization/deserialization

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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.
This commit is contained in:
Olaoluwa Osuntokun
2016-10-18 16:21:48 -07:00
committed by Dave Collins
parent 1b359e1131
commit 48abfdf87c
51 changed files with 862 additions and 515 deletions
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4
wire/msgversion.go
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@@ -76,7 +76,7 @@ func (msg *MsgVersion) AddService(service ServiceFlag) {
// *bytes.Buffer so the number of remaining bytes can be ascertained.
//
// This is part of the Message interface implementation.
func (msg *MsgVersion) BtcDecode(r io.Reader, pver uint32) error {
func (msg *MsgVersion) BtcDecode(r io.Reader, pver uint32, enc MessageEncoding) error {
buf, ok := r.(*bytes.Buffer)
if !ok {
return fmt.Errorf("MsgVersion.BtcDecode reader is not a " +
@@ -149,7 +149,7 @@ func (msg *MsgVersion) BtcDecode(r io.Reader, pver uint32) error {
// BtcEncode encodes the receiver to w using the bitcoin protocol encoding.
// This is part of the Message interface implementation.
func (msg *MsgVersion) BtcEncode(w io.Writer, pver uint32) error {
func (msg *MsgVersion) BtcEncode(w io.Writer, pver uint32, enc MessageEncoding) error {
err := validateUserAgent(msg.UserAgent)
if err != nil {
return err