wire

Package wire implements the litecoin 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 litecoin peers at the wire protocol level.

Installation and Updating

$ go get -u github.com/ltcmweb/ltcd/wire

Litecoin Message Overview

The litecoin protocol consists of exchanging messages between peers. Each message is preceded by a header which identifies information about it such as which litecoin 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 litecoin 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 litecoin messages are provided. For these supported messages, all of the details of marshalling and unmarshalling to and from the wire using litecoin encoding are handled so the caller doesn't have to concern themselves with the specifics.

Reading Messages Example

In order to unmarshal litecoin 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 litecoin peer. Example syntax is:

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

	// Reads and validates the next litecoin message from conn using the
	// protocol version pver and the litecoin 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 litecoin 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 litecoin peer. Example syntax to request addresses from a remote peer is:

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

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

	// Writes a litecoin message msg to conn using the protocol version
	// pver, and the litecoin 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 the ltcsuite developers. 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.