neo-go/cli

NEO-GO client

The Neo-Go client is used to run node, create/compile/deploy/invoke/debug smart contracts, run vm and operate with the wallet.

Running node

To start Neo Go node locally it's required to run neo-privatenet Docker image on your machine.

To run node you can use

make run

or run the binary directly:

./bin/neo-go node

By default the node will run on the private network, to change this use additional network flag:

./bin/neo-go node --mainnet

Available network flags

• --mainnet, -m
• --privnet, -p
• --testnet, -t

Configuration path

If you want to use some specific configuration path you have to use --config-path flag

./bin/neo-go node --config-path /user/yourConfigPath

Configuration

All config files are located in ./config and they are differentiated according to the network type:

• protocol.mainnet.yml belongs to --mainnet network mode
• protocol.privnet.yml belongs to --privnet network mode and used be default
• protocol.testnet.yml belongs to --testnet network mode
• protocol.unit_testnet.yml used by unit tests

Those files are automatically loaded, corresponding the provided netmode flag. Example of such configuration:

ProtocolConfiguration:
  Magic: 56753
  AddressVersion: 23
  StandbyValidators:
  - 02b3622bf4017bdfe317c58aed5f4c753f206b7db896046fa7d774bbc4bf7f8dc2
  - 02103a7f7dd016558597f7960d27c516a4394fd968b9e65155eb4b013e4040406e
  - 03d90c07df63e690ce77912e10ab51acc944b66860237b608c4f8f8309e71ee699
  - 02a7bc55fe8684e0119768d104ba30795bdcc86619e864add26156723ed185cd62
  SeedList:
  - 127.0.0.1:20333
  - 127.0.0.1:20334
  - 127.0.0.1:20335
  - 127.0.0.1:20336
  SystemFee:
    EnrollmentTransaction: 1000
    IssueTransaction: 500
    PublishTransaction: 500
    RegisterTransaction: 10000

ApplicationConfiguration:
  DataDirectoryPath: "./chains/privnet"
  RPCPort: 20332
  NodePort: 20333
  Relay: true
  DialTimeout: 3
  ProtoTickInterval: 2
  MaxPeers: 50

Node debug mode

There is a debug mode available by additional flag: --debug, -d

Smart contract create/compile/deploy/invoke/debug

Create

In order to create new smart contract: ./bin/neo-go contract init -n TestContract

where init used to initialize new contract and --name, -n - to specify contract name.

It will run wizard with a few questions:

Author: TestAuthor
Email: test@gmail.com
Version: 1
Project name: Test
Description: desc
Successfully initialized smart contract [TestContract]

After that you will have a package with TestContract name and it will include

• main.go smart contract file
• neo-go.yml project section containing information about the contact

In case you don't want to provide details use --skip-details, -skip.

Compile

./bin/neo-go contract compile -i mycontract.go

By default the output filename will be the name of your .go file with the .avm extension, the file will be located in the same directory where you called the command from. If you want another location for your compiled contract:

./bin/neo-go contract compile -i mycontract.go --out /Users/foo/bar/contract.avm

Deploy

//Not implemented yet

Invoke

//Implemented in test mode. It means that it won't affect the blockchain

./bin/neo-go contract testinvoke -i mycontract.avm

Debug

You can dump the opcodes generated by the compiler with the following command:

./bin/neo-go contract inspect -i mycontract.go

This will result in something like this:

INDEX    OPCODE    DESC
0        0x54      PUSH4
1        0xc5      NEWARRAY
2        0x6b      TOALTSTACK
3        0x5a      PUSH10
4        0x6a      DUPFROMALTSTACK
5        0x0       PUSH0
6        0x52      PUSH2
7        0x7a      ROLL
8        0xc4      SETITEM
9        0x6a      DUPFROMALTSTACK
10       0x0       PUSH0
11       0xc3      PICKITEM
12       0x5a      PUSH10
13       0xa2      GTE
14       0x64      JMPIFNOT
15       0x7       7
15       0x0       0
17       0x51      PUSH1
18       0x6c      FROMALTSTACK
19       0x75      DROP
20       0x66      RET
21       0x0       PUSH0
22       0x6c      FROMALTSTACK
23       0x75      DROP
24       0x66      RET

In depth documentation about the neo-go compiler and smart contract examples can be found inside the compiler package.

VM run

To run VM use

./bin/neo-go vm

For the detailed help use help in VM console. There is a small subset of commands:

• loadgo -- loads smart contract NEO-GO-VM > loadgo TestContract/main.go
• ops -- show the opcodes of currently loaded contract
• run -- executes currently loaded contract

More details can be found in [vm package](compiler package)

Wallet operations

• ./bin/neo-go wallet create -p newWallet to create new wallet in the path newWallet
• ./bin/neo-go wallet open -p newWallet to open created wallet in the path newWallet
• ./bin/neo-go wallet create -p newWallet -a to create new account