neo-go/pkg/rpc

RPC

What

• Structs used by JSON-RPC server and for interacting with a JSON-RPC endpoint.
• Server for running the JSON-RPC protocol based on port in configuration.

This package is currently in alpha and is subject to change.

Reference

• JSON-RPC 2.0 Specification
• NEO JSON-RPC 2.0 docs

Client

You can create a new client and start interacting with any NEO node that exposes their JSON-RPC endpoint. See godocs for example.

Not all methods are currently supported in the client, please see table below for supported methods.

TODO

• Merge structs so can be used by both server and client.
• Add missing methods to client.
• Allow client to connect using client cert.

Supported methods

Method	Implemented	Required to implement
getblock	Yes	-
getaccountstate	Yes	-
invokescript	Yes	-
invokefunction	Yes	-
sendrawtransaction	Yes	-
invoke	Yes	-
getrawtransaction	Yes	-
validateaddress	No	Handler and result struct
getblocksysfee	No	Handler and result struct
getcontractstate	No	Handler and result struct
getrawmempool	No	Handler and result struct
getstorage	No	Handler and result struct
submitblock	No	Handler and result struct
gettxout	No	Handler and result struct
getassetstate	No	Handler and result struct
getpeers	No	Handler and result struct
getversion	No	Handler and result struct
getconnectioncount	No	Handler and result struct
getblockhash	No	Handler and result struct
getblockcount	No	Handler and result struct
getbestblockhash	No	Handler and result struct

Server

The server is written to support as much of the JSON-RPC 2.0 Spec as possible. The server is run as part of the node currently.

TODO

• Implement HTTPS server.
• Add remaining methods (Documented below).
• Add Swagger spec and test using dredd in circleCI.

Example call

An example would be viewing the version of the node:

$ curl -X POST -d '{"jsonrpc": "2.0", "method": "getversion", "params": [], "id": 1}' http://localhost:20332

which would yield the response:

{
  "jsonrpc" : "2.0",
    "id" : 1,
    "result" : {
      "port" : 20333,
      "useragent" : "/NEO-GO:0.36.0-dev/",
      "nonce" : 9318417
    }
}

Supported methods

Method	Implemented	Required to implement
getblock	Yes	-
getaccountstate	Yes	-
invokescript	No	VM
invokefunction	No	VM
sendrawtransaction	No	Needs to be implemented in pkg/core/blockchain.go
validateaddress	Yes	-
getblocksysfee	No	N/A
getcontractstate	No	Needs to be implemented in pkg/core/blockchain.go
getrawmempool	No	Needs to be implemented on in pkg/network/server.go
getrawtransaction	No	Needs to be implemented in pkg/core/blockchain.go
getstorage	No	VM
submitblock	No	Needs to be implemented in pkg/core/blockchain.go
gettxout	No	Needs to be implemented in pkg/core/blockchain.go
invoke	No	VM
getassetstate	Yes	-
getpeers	Yes	-
getversion	Yes	-
getconnectioncount	Yes	-
getblockhash	Yes	-
getblockcount	Yes	-
getbestblockhash	Yes	-