begin conversion to rpc over http

Per specification at
https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC

rpc/message.go

@@ -1,14 +1,169 @@
 package rpc
 
-import "github.com/ethereum/go-ethereum/ethutil"
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
 
-type Message struct {
-	Call string        `json:"call"`
-	Args []interface{} `json:"args"`
-	Id   int           `json:"_id"`
-	Data interface{}   `json:"data"`
+	// "github.com/ethereum/go-ethereum/ethutil"
+)
+
+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 JsonResponse interface {
+// }
+
+type ErrorResponse struct {
+	Error     bool   `json:"error"`
+	ErrorText string `json:"errorText"`
 }
 
-func (self *Message) Arguments() *ethutil.Value {
-	return ethutil.NewValue(self.Args)
+// type SuccessRes struct {
+// 	Error bool `json:"error"`
+// 	Result JsonResponse `json:"result"`
+// }
+
+// type Message struct {
+// 	Call string        `json:"call"`
+// 	Args []interface{} `json:"args"`
+// 	Id   int           `json:"_id"`
+// 	Data interface{}   `json:"data"`
+// }
+
+// func (self *Message) Arguments() *ethutil.Value {
+// 	return ethutil.NewValue(self.Args)
+// }
+
+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)
+	}
+	jsonlogger.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)
+	}
+	jsonlogger.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)
+	}
+	jsonlogger.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)
+	}
+	jsonlogger.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)
+	}
+	jsonlogger.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)
+	}
+	jsonlogger.DebugDetailf("%T %v", args, args)
+	return args, nil
+}
+
+// func NewSuccessRes(object JsonResponse) string {
+// 	e := SuccessRes{Error: false, Result: object}
+// 	res, err := json.Marshal(e)
+// 	if err != nil {
+// 		// This should never happen
+// 		panic("Creating json error response failed, help")
+// 	}
+// 	success := string(res)
+// 	return success
+// 	// return res
+// }
+
+func NewErrorResponse(msg string) error {
+	return errors.New(msg)
 }