path: root/rpc/message.go

/*
  This file is part of go-ethereum

  go-ethereum is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  go-ethereum is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
package rpc

import (
    "bytes"
    "encoding/json"
    "errors"
)

const (
    ErrorArguments      = "Error: Insufficient arguments"
    ErrorNotImplemented = "Error: Method not implemented"
    ErrorUnknown        = "Error: Unknown error"
    ErrorParseRequest   = "Error: Could not parse request"
    ErrorDecodeArgs     = "Error: Could not decode arguments"
)

type ErrorResponse struct {
    Error     bool   `json:"error"`
    ErrorText string `json:"errorText"`
}

type RpcSuccessResponse struct {
    ID      int         `json:"id"`
    JsonRpc string      `json:"jsonrpc"`
    Error   bool        `json:"error"`
    Result  interface{} `json:"result"`
}

type RpcErrorResponse struct {
    ID        int    `json:"id"`
    JsonRpc   string `json:"jsonrpc"`
    Error     bool   `json:"error"`
    ErrorText string `json:"errortext"`
}

type RpcRequest struct {
    JsonRpc string            `json:"jsonrpc"`
    ID      int               `json:"id"`
    Method  string            `json:"method"`
    Params  []json.RawMessage `json:"params"`
}

func (req *RpcRequest) ToGetBlockArgs() (*GetBlockArgs, error) {
    if len(req.Params) < 1 {
        return nil, NewErrorResponse(ErrorArguments)
    }

    args := new(GetBlockArgs)
    r := bytes.NewReader(req.Params[0])
    err := json.NewDecoder(r).Decode(args)
    if err != nil {
        return nil, NewErrorResponse(ErrorDecodeArgs)
    }
    rpclogger.DebugDetailf("%T %v", args, args)
    return args, nil
}

func (req *RpcRequest) ToNewTxArgs() (*NewTxArgs, error) {
    if len(req.Params) < 7 {
        return nil, NewErrorResponse(ErrorArguments)
    }

    args := new(NewTxArgs)
    r := bytes.NewReader(req.Params[0])
    err := json.NewDecoder(r).Decode(args)
    if err != nil {
        return nil, NewErrorResponse(ErrorDecodeArgs)
    }
    rpclogger.DebugDetailf("%T %v", args, args)
    return args, nil
}

func (req *RpcRequest) ToPushTxArgs() (*PushTxArgs, error) {
    if len(req.Params) < 1 {
        return nil, NewErrorResponse(ErrorArguments)
    }

    args := new(PushTxArgs)
    r := bytes.NewReader(req.Params[0])
    err := json.NewDecoder(r).Decode(args)
    if err != nil {
        return nil, NewErrorResponse(ErrorDecodeArgs)
    }
    rpclogger.DebugDetailf("%T %v", args, args)
    return args, nil
}

func (req *RpcRequest) ToGetStorageArgs() (*GetStorageArgs, error) {
    if len(req.Params) < 2 {
        return nil, NewErrorResponse(ErrorArguments)
    }

    args := new(GetStorageArgs)
    // TODO need to pass both arguments
    r := bytes.NewReader(req.Params[0])
    err := json.NewDecoder(r).Decode(args)
    if err != nil {
        return nil, NewErrorResponse(ErrorDecodeArgs)
    }
    rpclogger.DebugDetailf("%T %v", args, args)
    return args, nil
}

func (req *RpcRequest) ToGetTxCountArgs() (*GetTxCountArgs, error) {
    if len(req.Params) < 1 {
        return nil, NewErrorResponse(ErrorArguments)
    }

    args := new(GetTxCountArgs)
    r := bytes.NewReader(req.Params[0])
    err := json.NewDecoder(r).Decode(args)
    if err != nil {
        return nil, NewErrorResponse(ErrorDecodeArgs)
    }
    rpclogger.DebugDetailf("%T %v", args, args)
    return args, nil
}

func (req *RpcRequest) ToGetBalanceArgs() (*GetBalanceArgs, error) {
    if len(req.Params) < 1 {
        return nil, NewErrorResponse(ErrorArguments)
    }

    args := new(GetBalanceArgs)
    r := bytes.NewReader(req.Params[0])
    err := json.NewDecoder(r).Decode(args)
    if err != nil {
        return nil, NewErrorResponse(ErrorDecodeArgs)
    }
    rpclogger.DebugDetailf("%T %v", args, args)
    return args, nil
}

func (req *RpcRequest) ToGetCodeAtArgs() (*GetCodeAtArgs, error) {
    if len(req.Params) < 1 {
        return nil, NewErrorResponse(ErrorArguments)
    }

    args := new(GetCodeAtArgs)
    r := bytes.NewReader(req.Params[0])
    err := json.NewDecoder(r).Decode(args)
    if err != nil {
        return nil, NewErrorResponse(ErrorDecodeArgs)
    }
    rpclogger.DebugDetailf("%T %v", args, args)
    return args, nil
}

func NewErrorResponse(msg string) error {
    return errors.New(msg)
}