Go Node and SDK for the NEO blockchain.
[](https://codecov.io/gh/nspcc-dev/neo-go/branch/master-2.x)
[](https://circleci.com/gh/nspcc-dev/neo-go/tree/master-2.x)
# Overview
This project aims to be a full port of the original C# [Neo project](https://github.com/neo-project).
A complete toolkit for the NEO blockchain, including:
- [Consensus node](docs/consensus.md)
- [RPC node & client](docs/rpc.md)
- [CLI tool](docs/cli.md)
- [Smart contract compiler](docs/compiler.md)
- [NEO virtual machine](docs/vm.md)
This branch (**master-2.x**) is a stable version of the project compatible
with Neo 2, it only receives bug fixes and minor updates. For the Neo 3
development version please refer to the [**master**
branch](https://github.com/nspcc-dev/neo-go/tree/master) and releases
after 0.90.0. Releases before 0.80.0 (**0.7X.Y** track) are made from this
branch and only contain Neo 2 code.
# Getting started
## Installation
Go: 1.12+
Install dependencies.
`neo-go` uses [GoModules](https://github.com/golang/go/wiki/Modules) as dependency manager:
```
make deps
```
## How to setup a node
### Docker
Each tagged build is built to docker hub and the `:latest` tag pointing at the latest tagged build.
By default the `CMD` is set to run a node on `testnet`, so to do this simply run:
```bash
docker run -d --name neo-go -p 20332:20332 -p 20333:20333 cityofzion/neo-go
```
Which will start a node on `testnet` and expose the nodes port `20333` and `20332` for the `JSON-RPC` server.
### Building
Build the **neo-go** CLI:
```
make build
```
### Running
Quick start a NEO node on the private network. This requires the [neo-privatenet](https://hub.docker.com/r/cityofzion/neo-privatenet/) Docker image running on your machine.
```
make run
```
To run the binary directly:
```
./bin/neo-go node
```
By default the node will run on the `private network`, to change his:
```
./bin/neo-go node --mainnet
```
Available network flags:
- `--mainnet, -m`
- `--privnet, -p`
- `--testnet, -t`
#### Importing mainnet/testnet dump files
If you want to jump-start your mainnet or testnet node with [chain archives
provided by NGD](https://sync.ngd.network/) follow these instructions:
```
$ wget .../chain.acc.zip # chain dump file
$ unzip chain.acc.zip
$ ./bin/neo-go db restore -m -i chain.acc # for testnet use '-t' flag instead of '-m'
```
The process differs from the C# node in that block importing is a separate
mode, after it ends the node can be started normally.
## Smart contract development
Please refer to [neo-go smart contract development
workshop](https://github.com/nspcc-dev/neo-go-sc-wrkshp) that shows some
simple contracts that can be compiled/deployed/run using neo-go compiler, SDK
and private network.
# Developer notes
Nodes have such features as [Prometheus](https://prometheus.io/docs/guides/go-application) and
[Pprof](https://golang.org/pkg/net/http/pprof/) in order to have additional information about them for debugging.
How to configure Prometheus or Pprof:
In `config/protocol.*.yml` there is
```
Prometheus:
Enabled: true
Port: 2112
```
where you can switch on/off and define port. Prometheus is enabled and Pprof is disabled by default.
## Contributing
Feel free to contribute to this project after reading the
[contributing guidelines](CONTRIBUTING.md).
Before starting to work on a certain topic, create an new issue first,
describing the feature/topic you are going to implement.
# Contact
- [@roman-khimov](https://github.com/roman-khimov) on GitHub
- [@fyrchik](https://github.com/fyrchik) on Github
- Reach out to us on the [NEO Discord](https://discordapp.com/invite/R8v48YA) channel
# License
- Open-source [MIT](LICENSE.md)