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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/msgheaders.go
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@ -36,7 +36,7 @@ func (msg *MsgHeaders) AddBlockHeader(bh *BlockHeader) error {
// BtcDecode decodes r using the bitcoin protocol encoding into the receiver.
// This is part of the Message interface implementation.
func (msg *MsgHeaders) BtcDecode(r io.Reader, pver uint32) error {
func (msg *MsgHeaders) BtcDecode(r io.Reader, pver uint32, enc MessageEncoding) error {
count, err := ReadVarInt(r, pver)
if err != nil {
return err
@ -79,7 +79,7 @@ func (msg *MsgHeaders) 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 *MsgHeaders) BtcEncode(w io.Writer, pver uint32) error {
func (msg *MsgHeaders) BtcEncode(w io.Writer, pver uint32, enc MessageEncoding) error {
// Limit to max block headers per message.
count := len(msg.Headers)
if count > MaxBlockHeadersPerMsg {