lnd.xprv/README.md
2017-01-12 16:43:55 -08:00

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## Lightning Network Daemon
[![Build Status](http://img.shields.io/travis/lightningnetwork/lnd.svg)]
(https://travis-ci.org/lightningnetwork/lnd)
    
[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)]
(https://github.com/lightningnetwork/lnd/blob/master/LICENSE)
    
[![Irc](https://img.shields.io/badge/chat-on%20freenode-brightgreen.svg)]
(https://webchat.freenode.net/?channels=lnd)
    
[![Godoc](https://godoc.org/github.com/lightningnetwork/lnd?status.svg)]
(https://godoc.org/github.com/lightningnetwork/lnd)
The Lightning Network Daemon (`lnd`) - is a complete implementation of a
[Lightning Network](http://lightning.network) node and currently
deployed on `testnet4` - the Bitcoin Test Network. It utilizes an
upcoming upgrade to Bitcoin: Segregated Witness (`segwit`). The
project's codebase uses the [btcsuite](https://github.com/btcsuite/) set
of Bitcoin libraries, and is currently dependant on [btcd](https://github.com/btcsuite/btcd).
In the current state `lnd` is capable of:
* creating channels
* closing channels
* completely managing all channel states (including the exceptional ones!)
* maintaining a fully authenticated+validated channel graph
* performing path finding within the network, passively forwarding
incoming payments
* sending outgoing [onion-encrypted payments](https://github.com/lightningnetwork/lightning-onion)
through the network
## Lightning Network Specification Compliance
`lnd` doesn't yet _fully_ conform to the [Lightning Network specification
(BOLT's)](https://github.com/lightningnetwork/lightning-rfc). BOLT stands
for: Basic of Lightning Technologies. The specifications are currently being drafted
by several groups of implementers based around the world including the
developers of `lnd`. The set of specification documents as well as our
implementation of the specification are still a work-in-progress. With that
said, `lnd` the current status of `lnd`'s BOLT compliance is:
- [ ] BOLT 1: Base Protocol
* `lnd` currently utilizes a distinct wire format which was created
before the emgergence of the current draft of BOLT specifications.
We don't have an `init` message, but we do have analogues to all
the other defined message types.
- [ ] BOLT 2: Peer Protocol for Channel Management
* `lnd` implements all the functionality defined within the
document, however we currently use a different set of wire messages.
Additionally,`lnd` uses a distinct commitment update state-machine
and doesn't yet support dynamically updating commitment fees.
- [ ] BOLT 3: Bitcoin Transaction and Script Formats
* `lnd` currently uses a commitment design from a prior iteration
of the protocol. Revocation secret generation is handled by `elkrem`
and our scripts are slightly different.
- [X] BOLT 4: Onion Routing Protocol
- [X] BOLT 5: Recommendations for On-chain Transaction Handling
- [X] BOLT 7: P2P Node and Channel Discovery
- [X] BOLT 8: Encrypted and Authenticated Transport
## Installation
In order to build form source, the following build dependencies are
required:
* **Go:** Installation instructions can be found [here](http://golang.org/doc/install).
It is recommended to add `$GOPATH/bin` to your `PATH` at this point.
**Note:** If you are building with `Go 1.5`, then you'll need to
enable the vendor experiment by setting the `GO15VENDOREXPERIMENT`
environment variable to `1`. If you're using `Go 1.6` or later, then
it is safe to skip this step.
* **Glide:** This project uses `Glide` to manage dependencies as well
as to provide *reproducible builds*. To install `Glide`, execute the
following command (assumes you already have Go properly installed):
```
$ go get -u github.com/Masterminds/glide
```
* **btcd:** This project currently requires `btcd` with segwit support,
which is not yet merged into the master branch. Instead,
[roasbeef](https://github.com/roasbeef/btcd) maintains a fork with his
segwit implementation applied. To install, please see
[the installation instructions](docs/INSTALL.md).
With the preliminary steps completed, to install `lnd`, `lncli`, and all
related dependencies run the following commands:
```
$ git clone https://github.com/lightningnetwork/lnd $GOPATH/src/github.com/lightningnetwork/lnd
$ cd $GOPATH/src/github.com/lightningnetwork/lnd
$ glide install
$ go install . ./cmd/...
```
### Updating
To update your version of `lnd` to the latest version run the following
commands:
```
$ cd $GOPATH/src/github.com/lightningnetwork/lnd
$ git pull && glide install
$ go install . ./cmd/...
```
### Tests
To check that `lnd` was installed properly run the following command:
```
go install; go test -v -p 1 $(go list ./... | grep -v '/vendor/')
```
## IRC
* irc.freenode.net
* channel #lnd
* [webchat](https://webchat.freenode.net/?channels=lnd)
## Further reading
* [Step-by-step send payment guide with docker](https://github.com/lightningnetwork/lnd/tree/master/docker)
* [Contribution guide](https://github.com/lightningnetwork/lnd/blob/master/docs/code_contribution_guidelines.md)