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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/msginv.go
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@@ -45,7 +45,7 @@ func (msg *MsgInv) AddInvVect(iv *InvVect) error {
// BtcDecode decodes r using the bitcoin protocol encoding into the receiver.
// This is part of the Message interface implementation.
func (msg *MsgInv) BtcDecode(r io.Reader, pver uint32) error {
func (msg *MsgInv) BtcDecode(r io.Reader, pver uint32, enc MessageEncoding) error {
count, err := ReadVarInt(r, pver)
if err != nil {
return err
@@ -75,7 +75,7 @@ func (msg *MsgInv) 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 *MsgInv) BtcEncode(w io.Writer, pver uint32) error {
func (msg *MsgInv) BtcEncode(w io.Writer, pver uint32, enc MessageEncoding) error {
// Limit to max inventory vectors per message.
count := len(msg.InvList)
if count > MaxInvPerMsg {