README
¶
Go Node and SDK for the NEO blockchain.
Overview
This project aims to be a full port of the original C# Neo project. A complete toolkit for the NEO blockchain, including:
- Consensus node
- RPC node & client
- CLI tool
- Smart contract compiler
- NEO virtual machine
- Smart contract examples
- Oracle service
- State validation service
This branch (master) is under active development now (read: won't work out of the box) and aims to be compatible with Neo 3. For the current stable version compatible with Neo 2 please refer to the master-2.x branch and releases before 0.80.0 (0.7X.Y track). Releases starting from 0.90.0 contain Neo 3 code (0.90.0 being compatible with Neo 3 preview2).
Getting started
Installation
NeoGo is distributed as a single binary that includes all the functionality
provided (but smart contract compiler requires Go compiler to operate). You
can grab it from releases
page, use a Docker image (see
Docker Hub for various releases of
NeoGo, :latest points to the latest release) or build yourself.
Building
To build NeoGo you need Go 1.14+ and make:
make build
The resulting binary is bin/neo-go.
Running a node
A node needs to connect to some network, either local one (usually referred to
as privnet) or public (like mainnet or testnet). Network configuration
is stored in a file and NeoGo allows you to store multiple files in one
directory (./config by default) and easily switch between them using network
flags.
To start Neo node on private network use:
./bin/neo-go node
Or specify a different network with appropriate flag like this:
./bin/neo-go node --mainnet
Available network flags:
--mainnet, -m--privnet, -p--testnet, -t
Docker
By default the CMD is set to run a node on privnet, so to do this simply run:
docker run -d --name neo-go -p 20332:20332 -p 20331:20331 nspccdev/neo-go
Which will start a node on privnet and expose node's ports 20332 (P2P
protocol) and 20331 (JSON-RPC server).
Importing mainnet/testnet dump files
If you want to jump-start your mainnet or testnet node with chain archives provided by NGD follow these instructions (when they'd be available for 3.0 networks):
$ 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.
Running a private network
Refer to consensus node documentation.
Smart contract development
Please refer to neo-go smart contract development workshop that shows some simple contracts that can be compiled/deployed/run using neo-go compiler, SDK 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.
Refer to examples for more NEO smart contract examples written in Go.
Wallets
NeoGo differs substantially from C# implementation in its approach to wallets. NeoGo wallet is just a NEP-6 file that is used by CLI commands to sign various things. There is no database behind it, the blockchain is the database and CLI commands use RPC to query data from it. At the same time it's not required to open the wallet on RPC node to perform various actions (unless your node is providing some service for the network like consensus or oracle nodes).
Developer notes
Nodes have such features as Prometheus and 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.
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 on GitHub
- @fyrchik on Github
- Reach out to us on the NEO Discord channel
License
- Open-source MIT
Directories
¶
| Path | Synopsis |
|---|---|
|
options
Package options contains a set of common CLI options and helper functions to use them.
|
Package options contains a set of common CLI options and helper functions to use them. |
|
examples
|
|
|
nft-nd
Package nft contains non-divisible non-fungible NEP11-compatible token implementation.
|
Package nft contains non-divisible non-fungible NEP11-compatible token implementation. |
|
nft-nd-nns
Module
|
|
|
internal
|
|
|
pkg
|
|
|
compiler
Package compiler implements Go to NEF smart contract compiler.
|
Package compiler implements Go to NEF smart contract compiler. |
|
config
Package config contains NeoGo node configuration definition.
|
Package config contains NeoGo node configuration definition. |
|
config/netmode
Package netmode contains well-known network magic numbers.
|
Package netmode contains well-known network magic numbers. |
|
consensus
Package consensus contains Neo consensus node implementation.
|
Package consensus contains Neo consensus node implementation. |
|
core
Package core implements Neo ledger functionality.
|
Package core implements Neo ledger functionality. |
|
core/block
Package block contains Neo block definition.
|
Package block contains Neo block definition. |
|
core/interop
Package interop contains implementations of Neo interop functions.
|
Package interop contains implementations of Neo interop functions. |
|
core/mpt
Package mpt implements MPT (Merkle-Patricia Tree).
|
Package mpt implements MPT (Merkle-Patricia Tree). |
|
core/native
Package native contains Neo native contracts.
|
Package native contains Neo native contracts. |
|
core/transaction
Package transaction contains Neo transaction definition.
|
Package transaction contains Neo transaction definition. |
|
crypto
Package crypto contains implementation of crypto functions used by Neo.
|
Package crypto contains implementation of crypto functions used by Neo. |
|
crypto/hash
Package hash contains wrappers for Neo hashing algorithms.
|
Package hash contains wrappers for Neo hashing algorithms. |
|
crypto/keys
Package keys wraps public/private keys and implements NEP-2 and WIF.
|
Package keys wraps public/private keys and implements NEP-2 and WIF. |
|
encoding/address
Package address implements conversion of script hash to/from Neo address.
|
Package address implements conversion of script hash to/from Neo address. |
|
encoding/base58
Package base58 wraps generic base58 encoder with NEO-specific checksumming.
|
Package base58 wraps generic base58 encoder with NEO-specific checksumming. |
|
encoding/bigint
Package bigint implements Neo-specific big.Int (de)serialization to/from []byte.
|
Package bigint implements Neo-specific big.Int (de)serialization to/from []byte. |
|
encoding/fixedn
Package fixedn implements fixed point integers with arbitrary precision.
|
Package fixedn implements fixed point integers with arbitrary precision. |
|
interop
Package interop contains smart contract API functions and type synonyms.
|
Package interop contains smart contract API functions and type synonyms. |
|
interop/contract
Package contract provides functions to work with contracts.
|
Package contract provides functions to work with contracts. |
|
interop/convert
Package convert provides functions for type conversion.
|
Package convert provides functions for type conversion. |
|
interop/crypto
Package crypto provides an interface to cryptographic syscalls.
|
Package crypto provides an interface to cryptographic syscalls. |
|
interop/iterator
Package iterator provides functions to work with Neo iterators.
|
Package iterator provides functions to work with Neo iterators. |
|
interop/math
Package math provides access to useful numeric functions available in Neo VM.
|
Package math provides access to useful numeric functions available in Neo VM. |
|
interop/native/crypto
Package crypto provides interface to CryptoLib native contract.
|
Package crypto provides interface to CryptoLib native contract. |
|
interop/native/gas
Package gas provides interface to GasToken native contract.
|
Package gas provides interface to GasToken native contract. |
|
interop/native/ledger
Package ledger provides interface to LedgerContract native contract.
|
Package ledger provides interface to LedgerContract native contract. |
|
interop/native/management
Package management provides interface to ContractManagement native contract.
|
Package management provides interface to ContractManagement native contract. |
|
interop/native/nameservice
Package nameservice provides interface to NameService native contract.
|
Package nameservice provides interface to NameService native contract. |
|
interop/native/neo
Package neo provides interface to NeoToken native contract.
|
Package neo provides interface to NeoToken native contract. |
|
interop/native/notary
Package notary provides interface to Notary native contract.
|
Package notary provides interface to Notary native contract. |
|
interop/native/oracle
Package oracle provides interface to OracleContract native contract.
|
Package oracle provides interface to OracleContract native contract. |
|
interop/native/policy
Package policy provides interface to PolicyContract native contract.
|
Package policy provides interface to PolicyContract native contract. |
|
interop/native/roles
Package roles provides interface to RoleManagement native contract.
|
Package roles provides interface to RoleManagement native contract. |
|
interop/native/std
Package std provides interface to StdLib native contract.
|
Package std provides interface to StdLib native contract. |
|
interop/neogointernal
Package neogointernal contains definitions of compiler intrinsics.
|
Package neogointernal contains definitions of compiler intrinsics. |
|
interop/runtime
Package runtime provides various service functions related to execution environment.
|
Package runtime provides various service functions related to execution environment. |
|
interop/storage
Package storage provides functions to access and modify contract's storage.
|
Package storage provides functions to access and modify contract's storage. |
|
interop/util
Package util contains some special useful functions that are provided by compiler and VM.
|
Package util contains some special useful functions that are provided by compiler and VM. |
|
rpc/client
Package client implements NEO-specific JSON-RPC 2.0 client.
|
Package client implements NEO-specific JSON-RPC 2.0 client. |
|
smartcontract/manifest/standard
Package standard contains interfaces for well-defined standards and function for checking if arbitrary manifest complies with them.
|
Package standard contains interfaces for well-defined standards and function for checking if arbitrary manifest complies with them. |
|
util/bitfield
Package bitfield provides a simple and efficient arbitrary size bit field implementation.
|
Package bitfield provides a simple and efficient arbitrary size bit field implementation. |