lbcd/wire
Dave Collins 6211eef7ee wire: Add new DoubleSha256SH function.
This commit adds a new function which is similar to the DoubleSha256
function except it returns a ShaHash copy instead of a byte slice.  It
also adds a new benchmark for it.

This can be a slight optimization in certain cases where the caller
ultimately wants a ShaHash since it can avoid a heap allocation and
additional copy to convert the result to a ShaHash (the function simply
performs a type cast against the returned array which is not possible
against a []byte).

existing: DoubleSha256     500000   3081 ns/op   32 B/op   1 allocs/op
     new: DoubleSha256SH   500000   2939 ns/op    0 B/op   0 allocs/op

The hashing functions for blocks and transactions have also been updated
to make use of the new function since they directly return the ShaHash.
The transaction change in particular is quite useful since transactions
are frequently hashed and this change allows all of those hashes to avoid
an additional heap allocation.
2015-04-06 11:37:43 -05:00
..
bench_test.go wire: Add new DoubleSha256SH function. 2015-04-06 11:37:43 -05:00
blockheader.go wire: Add new DoubleSha256SH function. 2015-04-06 11:37:43 -05:00
blockheader_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
common.go wire: Add new DoubleSha256SH function. 2015-04-06 11:37:43 -05:00
common_test.go wire: Display correct RandomUint64 test failures. 2015-02-25 15:32:00 -05:00
doc.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
error.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
fakeconn_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
fakemessage_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
fixedIO_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
internal_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
invvect.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
invvect_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
message.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
message_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgaddr.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgaddr_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgalert.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgalert_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgblock.go wire: Add func to get pkscript locs from a tx. 2015-03-09 22:09:09 -05:00
msgblock_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgfilteradd.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgfilteradd_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgfilterclear.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgfilterclear_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgfilterload.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgfilterload_test.go Run gofmt on wire directory. 2015-02-05 13:07:51 -06:00
msggetaddr.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msggetaddr_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msggetblocks.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msggetblocks_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msggetdata.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msggetdata_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msggetheaders.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msggetheaders_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgheaders.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgheaders_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msginv.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msginv_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgmempool.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgmempool_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgmerkleblock.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgmerkleblock_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgnotfound.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgnotfound_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgping.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgping_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgpong.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgpong_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgreject.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgreject_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgtx.go wire: Add new DoubleSha256SH function. 2015-04-06 11:37:43 -05:00
msgtx_test.go wire: Add func to get pkscript locs from a tx. 2015-03-09 22:09:09 -05:00
msgverack.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgverack_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
msgversion.go Run gofmt on wire directory. 2015-02-05 13:07:51 -06:00
msgversion_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
netaddress.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
netaddress_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
protocol.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
protocol_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
README.md Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00
shahash.go Minor hashing-related optimizations. 2015-04-06 11:33:58 -05:00
shahash_test.go Import btcwire repo into wire directory. 2015-01-31 14:59:57 -06:00

wire

[Build Status] (https://travis-ci.org/btcsuite/btcd) ![ISC License] (http://img.shields.io/badge/license-ISC-blue.svg)

Package wire implements the bitcoin wire protocol. A comprehensive suite of tests with 100% test coverage is provided to ensure proper functionality.

There is an associated blog post about the release of this package here.

This package has intentionally been designed so it can be used as a standalone package for any projects needing to interface with bitcoin peers at the wire protocol level.

Documentation

[GoDoc] (http://godoc.org/github.com/btcsuite/btcd/wire)

Full go doc style documentation for the project can be viewed online without installing this package by using the GoDoc site here: http://godoc.org/github.com/btcsuite/btcd/wire

You can also view the documentation locally once the package is installed with the godoc tool by running godoc -http=":6060" and pointing your browser to http://localhost:6060/pkg/github.com/btcsuite/btcd/wire

Installation

$ go get github.com/btcsuite/btcd/wire

Bitcoin Message Overview

The bitcoin protocol consists of exchanging messages between peers. Each message is preceded by a header which identifies information about it such as which bitcoin network it is a part of, its type, how big it is, and a checksum to verify validity. All encoding and decoding of message headers is handled by this package.

To accomplish this, there is a generic interface for bitcoin messages named Message which allows messages of any type to be read, written, or passed around through channels, functions, etc. In addition, concrete implementations of most of the currently supported bitcoin messages are provided. For these supported messages, all of the details of marshalling and unmarshalling to and from the wire using bitcoin encoding are handled so the caller doesn't have to concern themselves with the specifics.

Reading Messages Example

In order to unmarshal bitcoin messages from the wire, use the ReadMessage function. It accepts any io.Reader, but typically this will be a net.Conn to a remote node running a bitcoin peer. Example syntax is:

	// Use the most recent protocol version supported by the package and the
	// main bitcoin network.
	pver := wire.ProtocolVersion
	btcnet := wire.MainNet

	// Reads and validates the next bitcoin message from conn using the
	// protocol version pver and the bitcoin network btcnet.  The returns
	// are a wire.Message, a []byte which contains the unmarshalled
	// raw payload, and a possible error.
	msg, rawPayload, err := wire.ReadMessage(conn, pver, btcnet)
	if err != nil {
		// Log and handle the error
	}

See the package documentation for details on determining the message type.

Writing Messages Example

In order to marshal bitcoin messages to the wire, use the WriteMessage function. It accepts any io.Writer, but typically this will be a net.Conn to a remote node running a bitcoin peer. Example syntax to request addresses from a remote peer is:

	// Use the most recent protocol version supported by the package and the
	// main bitcoin network.
	pver := wire.ProtocolVersion
	btcnet := wire.MainNet

	// Create a new getaddr bitcoin message.
	msg := wire.NewMsgGetAddr()

	// Writes a bitcoin message msg to conn using the protocol version
	// pver, and the bitcoin network btcnet.  The return is a possible
	// error.
	err := wire.WriteMessage(conn, msg, pver, btcnet)
	if err != nil {
		// Log and handle the error
	}

GPG Verification Key

All official release tags are signed by Conformal so users can ensure the code has not been tampered with and is coming from Conformal. To verify the signature perform the following:

  • Download the public key from the Conformal website at https://opensource.conformal.com/GIT-GPG-KEY-conformal.txt

  • Import the public key into your GPG keyring:

    gpg --import GIT-GPG-KEY-conformal.txt
    
  • Verify the release tag with the following command where TAG_NAME is a placeholder for the specific tag:

    git tag -v TAG_NAME
    

License

Package wire is licensed under the copyfree ISC License.