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165 lines
5.8 KiB
Markdown
165 lines
5.8 KiB
Markdown
<p align="center">
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<img src="./.github/neo_color_dark_gopher.png" width="300px" alt="logo">
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</p>
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<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)
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[](https://circleci.com/gh/nspcc-dev/neo-go/tree/master)
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[](https://goreportcard.com/report/github.com/nspcc-dev/neo-go)
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[](https://godoc.org/github.com/nspcc-dev/neo-go)
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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)
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- [CLI tool](docs/cli.md)
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- [Smart contract compiler](docs/compiler.md)
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- [NEO virtual machine](docs/vm.md)
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- [Smart contract examples](examples/README.md)
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- [Oracle service](docs/oracle.md)
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- [State validation service](docs/stateroots.md)
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This branch (**master**) is under active development now (read: won't work
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out of the box) and aims to be compatible with Neo 3. For the current stable
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version compatible with Neo 2 please refer to the [**master-2.x**
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branch](https://github.com/nspcc-dev/neo-go/tree/master-2.x) and releases
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before 0.80.0 (**0.7X.Y** track). Releases starting from 0.90.0 contain
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Neo 3 code (0.90.0 being compatible with Neo 3 preview2).
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# Getting started
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## Installation
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NeoGo is distributed as a single binary that includes all the functionality
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provided (but smart contract compiler requires Go compiler to operate). You
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can grab it from [releases
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page](https://github.com/nspcc-dev/neo-go/releases), use a Docker image (see
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[Docker Hub](https://hub.docker.com/r/nspccdev/neo-go) for various releases of
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NeoGo, `:latest` points to the latest release) or build yourself.
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### Building
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To build NeoGo you need Go 1.14+ and `make`:
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```
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make build
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```
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The resulting binary is `bin/neo-go`.
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## Running a node
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A node needs to connect to some network, either local one (usually referred to
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as `privnet`) or public (like `mainnet` or `testnet`). Network configuration
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is stored in a file and NeoGo allows you to store multiple files in one
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directory (`./config` by default) and easily switch between them using network
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flags.
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To start Neo node on private network use:
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```
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./bin/neo-go node
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```
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Or specify a different network with appropriate flag like this:
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```
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./bin/neo-go node --mainnet
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```
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Available network flags:
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- `--mainnet, -m`
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- `--privnet, -p`
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- `--testnet, -t`
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### Docker
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By default the `CMD` is set to run a node on `privnet`, so to do this simply run:
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```bash
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docker run -d --name neo-go -p 20332:20332 -p 20331:20331 nspccdev/neo-go
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```
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Which will start a node on `privnet` and expose node's ports `20332` (P2P
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protocol) and `20331` (JSON-RPC server).
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### Importing mainnet/testnet dump files
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If you want to jump-start your mainnet or testnet node with [chain archives
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provided by NGD](https://sync.ngd.network/) follow these instructions (when
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they'd be available for 3.0 networks):
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```
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$ wget .../chain.acc.zip # chain dump file
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$ unzip chain.acc.zip
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$ ./bin/neo-go db restore -m -i chain.acc # for testnet use '-t' flag instead of '-m'
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```
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The process differs from the C# node in that block importing is a separate
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mode, after it ends the node can be started normally.
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## Running a private network
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Refer to [consensus node documentation](docs/consensus.md).
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## Smart contract development
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Please refer to [neo-go smart contract development
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workshop](https://github.com/nspcc-dev/neo-go-sc-wrkshp) that shows some
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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
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bytecode and what you can and can not do in smart contract please refer to the
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[compiler documentation](docs/compiler.md).
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Refer to [examples](examples/README.md) for more NEO smart contract examples
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written in Go.
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## Wallets
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NeoGo differs substantially from C# implementation in its approach to
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wallets. NeoGo wallet is just a
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[NEP-6](https://github.com/neo-project/proposals/blob/68398d28b6932b8dd2b377d5d51bca7b0442f532/nep-6.mediawiki)
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file that is used by CLI commands to sign various things. There is no database
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behind it, the blockchain is the database and CLI commands use RPC to query
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data from it. At the same time it's not required to open the wallet on RPC
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node to perform various actions (unless your node is providing some service
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for the network like consensus or oracle nodes).
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# Developer notes
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Nodes have such features as [Prometheus](https://prometheus.io/docs/guides/go-application) and
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[Pprof](https://golang.org/pkg/net/http/pprof/) in order to have additional information about them for debugging.
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How to configure Prometheus or Pprof:
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In `config/protocol.*.yml` there is
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```
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Prometheus:
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Enabled: true
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Port: 2112
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```
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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)
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