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< p align = "center" >
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< img src = "./.github/neo_color_dark_gopher.png" width = "300px" alt = "logo" >
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< / p >
< p align = "center" >
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< b > Go< / b > Node and SDK for the < a href = "https://neo.org" > NEO< / a > blockchain.
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< / p >
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< hr / >
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[](https://codecov.io/gh/nspcc-dev/neo-go/branch/master-2.x)
[](https://circleci.com/gh/nspcc-dev/neo-go/tree/master-2.x)
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# Overview
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This project aims to be a full port of the original C# [Neo project ](https://github.com/neo-project ).
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A complete toolkit for the NEO blockchain, including:
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- [Consensus node ](docs/consensus.md )
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- [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.
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# Getting started
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## Installation
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Go: 1.12+
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Install dependencies.
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`neo-go` uses [GoModules ](https://github.com/golang/go/wiki/Modules ) as dependency manager:
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```
make deps
```
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## How to setup a node
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### 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
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Build the **neo-go** CLI:
```
make build
```
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### Running
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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.
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```
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make run
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```
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To run the binary directly:
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```
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./bin/neo-go node
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```
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By default the node will run on the `private network` , to change his:
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```
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./bin/neo-go node --mainnet
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```
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Available network flags:
- `--mainnet, -m`
- `--privnet, -p`
- `--testnet, -t`
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#### 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
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and private network. For details on how Go code is translated to Neo VM
bytecode and what you can and can not do in smart contract please refer to the
[compiler documentation ](docs/compiler.md ).
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# Developer notes
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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.
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## Contributing
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Feel free to contribute to this project after reading the
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[contributing guidelines ](CONTRIBUTING.md ).
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Before starting to work on a certain topic, create an new issue first,
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describing the feature/topic you are going to implement.
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# Contact
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- [@roman-khimov ](https://github.com/roman-khimov ) on GitHub
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- [@fyrchik ](https://github.com/fyrchik ) on Github
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- Reach out to us on the [NEO Discord ](https://discordapp.com/invite/R8v48YA ) channel
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# License
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- Open-source [MIT ](LICENSE.md )
