From 1b597b8ca9ee9564f29b93e1ba5877e012a8d989 Mon Sep 17 00:00:00 2001
From: Maran <maran.hidskes@gmail.com>
Date: Fri, 2 May 2014 12:01:50 +0200
Subject: [PATCH] Initial commit

---
 etherpc/packages.go | 185 ++++++++++++++++++++++++++++++++++++++++++++
 etherpc/server.go   |  82 ++++++++++++++++++++
 2 files changed, 267 insertions(+)
 create mode 100644 etherpc/packages.go
 create mode 100644 etherpc/server.go

diff --git a/etherpc/packages.go b/etherpc/packages.go
new file mode 100644
index 000000000..283da1a18
--- /dev/null
+++ b/etherpc/packages.go
@@ -0,0 +1,185 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"math/big"
+)
+
+type MainPackage struct{}
+
+type JsonResponse interface {
+	requirements() error
+}
+
+type BlockResponse struct {
+	Name string
+	Id   int
+}
+type GetBlockArgs struct {
+	JsonResponse
+	BlockNumber int
+	Hash        string
+}
+
+type ErrorResponse struct {
+	Error     bool
+	ErrorText string
+}
+
+type SuccessRes struct {
+	Error   bool
+	Message string
+}
+
+func NewSuccessRes(msg string) string {
+	e := SuccessRes{Error: true, Message: msg}
+	res, err := json.Marshal(e)
+	if err != nil {
+		// This should never happen
+		panic("Creating json error response failed, help")
+	}
+	return string(res)
+}
+
+func NewErrorResponse(msg string) error {
+	e := ErrorResponse{Error: true, ErrorText: msg}
+	res, err := json.Marshal(e)
+	if err != nil {
+		// This should never happen
+		panic("Creating json error response failed, help")
+	}
+	newErr := errors.New(string(res))
+	return newErr
+}
+
+func (b *GetBlockArgs) requirements() error {
+	if b.BlockNumber == 0 && b.Hash == "" {
+		return NewErrorResponse("This call requires either a block 'number' or a block 'hash' as argument")
+	}
+	return nil
+}
+
+func (p *MainPackage) GetBlock(args *GetBlockArgs, reply *BlockResponse) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+	// Do something
+
+	return nil
+}
+
+type NewTxArgs struct {
+	Sec       string
+	Recipient string
+	Value     *big.Int
+	Gas       *big.Int
+	GasPrice  *big.Int
+	Init      string
+	Body      string
+}
+type TxResponse struct {
+}
+
+func (a *NewTxArgs) requirements() error {
+	if a.Recipient == "" {
+		return NewErrorResponse("Transact requires a 'recipient' address as argument")
+	}
+	if a.Value == nil {
+		return NewErrorResponse("Transact requires a 'value' as argument")
+	}
+	if a.Gas == nil {
+		return NewErrorResponse("Transact requires a 'gas' value as argument")
+	}
+	if a.GasPrice == nil {
+		return NewErrorResponse("Transact requires a 'gasprice' value as argument")
+	}
+	return nil
+}
+
+func (a *NewTxArgs) requirementsContract() error {
+	if a.Value == nil {
+		return NewErrorResponse("Create requires a 'value' as argument")
+	}
+	if a.Gas == nil {
+		return NewErrorResponse("Create requires a 'gas' value as argument")
+	}
+	if a.GasPrice == nil {
+		return NewErrorResponse("Create requires a 'gasprice' value as argument")
+	}
+	if a.Init == "" {
+		return NewErrorResponse("Create requires a 'init' value as argument")
+	}
+	if a.Body == "" {
+		return NewErrorResponse("Create requires a 'body' value as argument")
+	}
+	return nil
+}
+
+func (p *MainPackage) Transact(args *NewTxArgs, reply *TxResponse) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (p *MainPackage) Create(args *NewTxArgs, reply *string) error {
+	err := args.requirementsContract()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (p *MainPackage) getKey(args interface{}, reply *string) error {
+	return nil
+}
+
+type GetStorageArgs struct {
+	Address string
+	Key     string
+}
+
+func (a *GetStorageArgs) requirements() error {
+	if a.Address == "" {
+		return NewErrorResponse("GetStorageAt requires an 'address' value as argument")
+	}
+	if a.Key == "" {
+		return NewErrorResponse("GetStorageAt requires an 'key' value as argument")
+	}
+	return nil
+}
+
+func (p *MainPackage) getStorageAt(args *GetStorageArgs, reply *string) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+type GetBalanceArgs struct {
+	Address string
+}
+
+func (a *GetBalanceArgs) requirements() error {
+	if a.Address == "" {
+		return NewErrorResponse("GetBalanceAt requires an 'address' value as argument")
+	}
+	return nil
+}
+
+func (p *MainPackage) GetBalanceAt(args *GetBalanceArgs, reply *string) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func (p *MainPackage) Test(args *GetBlockArgs, reply *int) error {
+	*reply = 15
+	return nil
+}
diff --git a/etherpc/server.go b/etherpc/server.go
new file mode 100644
index 000000000..291ca2d95
--- /dev/null
+++ b/etherpc/server.go
@@ -0,0 +1,82 @@
+package main
+
+import (
+	"log"
+	"net"
+	"net/rpc"
+	"net/rpc/jsonrpc"
+)
+
+type JsonRpcServer struct {
+	quit     chan bool
+	listener net.Listener
+}
+
+func (s *JsonRpcServer) exitHandler() {
+out:
+	for {
+		select {
+		case <-s.quit:
+			s.listener.Close()
+			break out
+		}
+	}
+
+	//	ethutil.Config.Log.Infoln("[JSON] Shutdown JSON-RPC server")
+	log.Println("[JSON] Shutdown JSON-RPC server")
+}
+
+func (s *JsonRpcServer) Stop() {
+	close(s.quit)
+}
+
+func (s *JsonRpcServer) Start() {
+	//	ethutil.Config.Log.Infoln("[JSON] Starting JSON-RPC server")
+	log.Println("[JSON] Starting JSON-RPC server")
+	go s.exitHandler()
+	rpc.Register(new(MainPackage))
+	rpc.HandleHTTP()
+
+	for {
+		conn, err := s.listener.Accept()
+		if err != nil {
+			//			ethutil.Config.Log.Infoln("[JSON] Error starting JSON-RPC:", err)
+			log.Println("[JSON] Error starting JSON-RPC:", err)
+			continue
+		}
+		log.Println("Incoming request")
+		go jsonrpc.ServeConn(conn)
+	}
+}
+
+func NewJsonRpcServer() *JsonRpcServer {
+	l, err := net.Listen("tcp", ":30304")
+	if err != nil {
+		//		ethutil.Config.Log.Infoln("Error starting JSON-RPC")
+		log.Println("Error starting JSON-RPC")
+	}
+
+	return &JsonRpcServer{
+		listener: l,
+		quit:     make(chan bool),
+	}
+}
+
+func main() {
+	s := NewJsonRpcServer()
+	s.Start()
+	/*
+
+		conn, err := net.Dial("tcp", "localhost:30304")
+
+		if err != nil {
+			panic(err)
+		}
+		defer conn.Close()
+		c := jsonrpc.NewClient(conn)
+		var reply int
+		err = c.Call("MainPackage.Test", nil, &reply)
+		log.Println("ERR:", err)
+		log.Println("result:", reply)
+	*/
+}