neoneo-go/docs/rpc.md
Roman Khimov cf39171485 rpc: implement invokefunction, fix #347
Param getters were redone to return errors because otherwise bad FuncParam
values could lead to panic. FuncParam itself might be not the most elegant
solution, but it works good enough for now.
2019-11-27 13:00:11 +03:00

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# RPC
## Client
Client is provided as a Go package, so please refer to the
[relevant godocs page](https://godoc.org/github.com/nspcc-dev/neo-go/pkg/rpc).
## Server
The server is written to support as much of the [JSON-RPC 2.0 Spec](http://www.jsonrpc.org/specification) as possible. The server is run as part of the node currently.
### Example call
An example would be viewing the version of the node:
```bash
$ curl -X POST -d '{"jsonrpc": "2.0", "method": "getversion", "params": [], "id": 1}' http://localhost:20332
```
which would yield the response:
```json
{
"jsonrpc" : "2.0",
"id" : 1,
"result" : {
"port" : 20333,
"useragent" : "/NEO-GO:0.36.0-dev/",
"nonce" : 9318417
}
}
```
### Supported methods
| Method | Implemented |
| ------- | ------------|
| `getaccountstate` | Yes |
| `getapplicationlog` | No (#500) |
| `getassetstate` | Yes |
| `getbestblockhash` | Yes |
| `getblock` | Yes |
| `getblockcount` | Yes |
| `getblockhash` | Yes |
| `getblocksysfee` | No (#341) |
| `getconnectioncount` | Yes |
| `getcontractstate` | No (#342) |
| `getnep5balances` | No (#498) |
| `getnep5transfers` | No (#498) |
| `getpeers` | Yes |
| `getrawmempool` | No (#175) |
| `getrawtransaction` | Yes |
| `getstorage` | No (#343) |
| `gettxout` | No (#345) |
| `getunspents` | Yes |
| `getversion` | Yes |
| `invoke` | No (#346) |
| `invokefunction` | Yes |
| `invokescript` | Yes |
| `sendrawtransaction` | Yes |
| `submitblock` | No (#344) |
| `validateaddress` | Yes |
#### Implementation notices
##### `invokefunction`
neo-go's implementation of `invokefunction` does not return `tx` field in the
answer because that requires signing the transaction with some key in the
server which doesn't fit the model of our node-client interactions. Lacking
this signature the transaction is almost useless, so there is no point in
returning it.
## Reference
* [JSON-RPC 2.0 Specification](http://www.jsonrpc.org/specification)
* [NEO JSON-RPC 2.0 docs](https://docs.neo.org/en-us/node/cli/apigen.html)