# 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](https://hub.docker.com/r/cityofzion/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: ```yaml 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 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](pkg/compiler). ## 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 ## Wallet operations - `./bin/neo-go wallet init -p newWallet` to create new wallet in the path `newWallet` - `./bin/neo-go wallet dump -p newWallet` to open created wallet in the path `newWallet` - `./bin/neo-go wallet init -p newWallet -a` to create new account