6 files changed, 889 insertions, 0 deletions
diff --git a/rpc/args.go b/rpc/args.go
new file mode 100644
index 000000000..8b01cc191
--- /dev/null
+++ b/rpc/args.go
@@ -0,0 +1,218 @@
+package rpc
+
+import (
+	"encoding/json"
+)
+
+type GetBlockArgs struct {
+	BlockNumber int32
+	Hash        string
+}
+
+func (obj *GetBlockArgs) UnmarshalJSON(b []byte) (err error) {
+	argint, argstr := int32(0), ""
+	if err = json.Unmarshal(b, &argint); err == nil {
+		obj.BlockNumber = argint
+		return
+	}
+	if err = json.Unmarshal(b, &argstr); err == nil {
+		obj.Hash = argstr
+		return
+	}
+	return NewErrorResponse(ErrorDecodeArgs)
+}
+
+func (obj *GetBlockArgs) requirements() error {
+	if obj.BlockNumber == 0 && obj.Hash == "" {
+		return NewErrorResponse("GetBlock requires either a block 'number' or a block 'hash' as argument")
+	}
+	return nil
+}
+
+type NewTxArgs struct {
+	Sec       string `json:"sec"`
+	Recipient string `json:"recipient"`
+	Value     string `json:"value"`
+	Gas       string `json:"gas"`
+	GasPrice  string `json:"gasprice"`
+	Init      string `json:"init"`
+	Body      string `json:"body"`
+}
+
+// type TxResponse struct {
+//  Hash string
+// }
+
+func (obj *NewTxArgs) UnmarshalJSON(b []byte) (err error) {
+	if err = json.Unmarshal(b, obj); err == nil {
+		return
+	}
+	return NewErrorResponse(ErrorDecodeArgs)
+}
+
+func (a *NewTxArgs) requirements() error {
+	if a.Recipient == "" {
+		return NewErrorResponse("Transact requires a 'recipient' address as argument")
+	}
+	if a.Value == "" {
+		return NewErrorResponse("Transact requires a 'value' as argument")
+	}
+	if a.Gas == "" {
+		return NewErrorResponse("Transact requires a 'gas' value as argument")
+	}
+	if a.GasPrice == "" {
+		return NewErrorResponse("Transact requires a 'gasprice' value as argument")
+	}
+	return nil
+}
+
+func (a *NewTxArgs) requirementsContract() error {
+	if a.Value == "" {
+		return NewErrorResponse("Create requires a 'value' as argument")
+	}
+	if a.Gas == "" {
+		return NewErrorResponse("Create requires a 'gas' value as argument")
+	}
+	if a.GasPrice == "" {
+		return NewErrorResponse("Create requires a 'gasprice' value as argument")
+	}
+	if a.Body == "" {
+		return NewErrorResponse("Create requires a 'body' value as argument")
+	}
+	return nil
+}
+
+type PushTxArgs struct {
+	Tx string `json:"tx"`
+}
+
+func (obj *PushTxArgs) UnmarshalJSON(b []byte) (err error) {
+	arg0 := ""
+	if err = json.Unmarshal(b, arg0); err == nil {
+		obj.Tx = arg0
+		return
+	}
+	return NewErrorResponse(ErrorDecodeArgs)
+}
+
+func (a *PushTxArgs) requirementsPushTx() error {
+	if a.Tx == "" {
+		return NewErrorResponse("PushTx requires a 'tx' as argument")
+	}
+	return nil
+}
+
+type GetStorageArgs struct {
+	Address string
+	Key     string
+}
+
+func (obj *GetStorageArgs) UnmarshalJSON(b []byte) (err error) {
+	arg0 := ""
+	if err = json.Unmarshal(b, arg0); err == nil {
+		obj.Address = arg0
+		return
+	}
+	return NewErrorResponse(ErrorDecodeArgs)
+}
+
+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
+}
+
+type GetStorageAtRes struct {
+	Key     string `json:"key"`
+	Value   string `json:"value"`
+	Address string `json:"address"`
+}
+
+type GetTxCountArgs struct {
+	Address string `json:"address"`
+}
+
+// type GetTxCountRes struct {
+//  Nonce int `json:"nonce"`
+// }
+
+func (obj *GetTxCountArgs) UnmarshalJSON(b []byte) (err error) {
+	arg0 := ""
+	if err = json.Unmarshal(b, arg0); err == nil {
+		obj.Address = arg0
+		return
+	}
+	return NewErrorResponse("Could not determine JSON parameters")
+}
+
+func (a *GetTxCountArgs) requirements() error {
+	if a.Address == "" {
+		return NewErrorResponse("GetTxCountAt requires an 'address' value as argument")
+	}
+	return nil
+}
+
+// type GetPeerCountRes struct {
+//  PeerCount int `json:"peerCount"`
+// }
+
+// type GetListeningRes struct {
+//  IsListening bool `json:"isListening"`
+// }
+
+// type GetCoinbaseRes struct {
+//  Coinbase string `json:"coinbase"`
+// }
+
+// type GetMiningRes struct {
+//  IsMining bool `json:"isMining"`
+// }
+
+type GetBalanceArgs struct {
+	Address string
+}
+
+func (obj *GetBalanceArgs) UnmarshalJSON(b []byte) (err error) {
+	arg0 := ""
+	if err = json.Unmarshal(b, &arg0); err == nil {
+		obj.Address = arg0
+		return
+	}
+	return NewErrorResponse("Could not determine JSON parameters")
+}
+
+func (a *GetBalanceArgs) requirements() error {
+	if a.Address == "" {
+		return NewErrorResponse("GetBalanceAt requires an 'address' value as argument")
+	}
+	return nil
+}
+
+type BalanceRes struct {
+	Balance string `json:"balance"`
+	Address string `json:"address"`
+}
+
+type GetCodeAtArgs struct {
+	Address string
+}
+
+func (obj *GetCodeAtArgs) UnmarshalJSON(b []byte) (err error) {
+	arg0 := ""
+	if err = json.Unmarshal(b, &arg0); err == nil {
+		obj.Address = arg0
+		return
+	}
+	return NewErrorResponse(ErrorDecodeArgs)
+}
+
+func (a *GetCodeAtArgs) requirements() error {
+	if a.Address == "" {
+		return NewErrorResponse("GetCodeAt requires an 'address' value as argument")
+	}
+	return nil
+}
diff --git a/rpc/http/server.go b/rpc/http/server.go
new file mode 100644
index 000000000..965727a4e
--- /dev/null
+++ b/rpc/http/server.go
@@ -0,0 +1,111 @@
+/*
+	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 rpchttp
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/ethereum/go-ethereum/xeth"
+)
+
+var rpchttplogger = logger.NewLogger("RPC-HTTP")
+var JSON rpc.JsonWrapper
+
+func NewRpcHttpServer(pipe *xeth.XEth, port int) (*RpcHttpServer, error) {
+	sport := fmt.Sprintf(":%d", port)
+	l, err := net.Listen("tcp", sport)
+	if err != nil {
+		return nil, err
+	}
+
+	return &RpcHttpServer{
+		listener: l,
+		quit:     make(chan bool),
+		pipe:     pipe,
+		port:     port,
+	}, nil
+}
+
+type RpcHttpServer struct {
+	quit     chan bool
+	listener net.Listener
+	pipe     *xeth.XEth
+	port     int
+}
+
+func (s *RpcHttpServer) exitHandler() {
+out:
+	for {
+		select {
+		case <-s.quit:
+			s.listener.Close()
+			break out
+		}
+	}
+
+	rpchttplogger.Infoln("Shutdown RPC-HTTP server")
+}
+
+func (s *RpcHttpServer) Stop() {
+	close(s.quit)
+}
+
+func (s *RpcHttpServer) Start() {
+	rpchttplogger.Infof("Starting RPC-HTTP server on port %d", s.port)
+	go s.exitHandler()
+
+	api := rpc.NewEthereumApi(s.pipe)
+	h := s.apiHandler(api)
+	http.Handle("/", h)
+
+	err := http.Serve(s.listener, nil)
+	// FIX Complains on shutdown due to listner already being closed
+	if err != nil {
+		rpchttplogger.Errorln("Error on RPC-HTTP interface:", err)
+	}
+}
+
+func (s *RpcHttpServer) apiHandler(api *rpc.EthereumApi) http.Handler {
+	fn := func(w http.ResponseWriter, req *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+
+		rpchttplogger.Debugln("Handling request")
+
+		reqParsed, reqerr := JSON.ParseRequestBody(req)
+		if reqerr != nil {
+			JSON.Send(w, &rpc.RpcErrorResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: true, ErrorText: rpc.ErrorParseRequest})
+			return
+		}
+
+		var response interface{}
+		reserr := api.GetRequestReply(&reqParsed, &response)
+		if reserr != nil {
+			rpchttplogger.Errorln(reserr)
+			JSON.Send(w, &rpc.RpcErrorResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: true, ErrorText: reserr.Error()})
+			return
+		}
+
+		rpchttplogger.Debugf("Generated response: %T %s", response, response)
+		JSON.Send(w, &rpc.RpcSuccessResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: false, Result: response})
+	}
+
+	return http.HandlerFunc(fn)
+}
diff --git a/rpc/json.go b/rpc/json.go
new file mode 100644
index 000000000..9bd204818
--- /dev/null
+++ b/rpc/json.go
@@ -0,0 +1,58 @@
+/*
+	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 (
+	"encoding/json"
+	"github.com/ethereum/go-ethereum/logger"
+	"io"
+	"net/http"
+)
+
+var rpclogger = logger.NewLogger("RPC")
+
+type JsonWrapper struct{}
+
+func (self JsonWrapper) Send(writer io.Writer, v interface{}) (n int, err error) {
+	var payload []byte
+	payload, err = json.Marshal(v)
+	if err != nil {
+		rpclogger.Fatalln("Error marshalling JSON", err)
+		return 0, err
+	}
+	rpclogger.Infof("Sending payload: %s", payload)
+
+	return writer.Write(payload)
+}
+
+func (self JsonWrapper) ParseRequestBody(req *http.Request) (RpcRequest, error) {
+	var reqParsed RpcRequest
+
+	// Convert JSON to native types
+	d := json.NewDecoder(req.Body)
+	// d.UseNumber()
+	defer req.Body.Close()
+	err := d.Decode(&reqParsed)
+
+	if err != nil {
+		rpclogger.Errorln("Error decoding JSON: ", err)
+		return reqParsed, err
+	}
+	rpclogger.DebugDetailf("Parsed request: %s", reqParsed)
+
+	return reqParsed, nil
+}
diff --git a/rpc/message.go b/rpc/message.go
new file mode 100644
index 000000000..caf50a6c0
--- /dev/null
+++ b/rpc/message.go
@@ -0,0 +1,167 @@
+/*
+  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)
+}
diff --git a/rpc/packages.go b/rpc/packages.go
new file mode 100644
index 000000000..5d17a0f90
--- /dev/null
+++ b/rpc/packages.go
@@ -0,0 +1,212 @@
+/*
+	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/>.
+*/
+/*
+
+For each request type, define the following:
+
+1. RpcRequest "To" method [message.go], which does basic validation and conversion to "Args" type via json.Decoder()
+2. json.Decoder() calls "UnmarshalON" defined on each "Args" struct
+3. EthereumApi method, taking the "Args" type and replying with an interface to be marshalled to ON
+
+*/
+package rpc
+
+import (
+	"math/big"
+	"strings"
+
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/ethereum/go-ethereum/xeth"
+)
+
+type RpcServer interface {
+	Start()
+	Stop()
+}
+
+func NewEthereumApi(xeth *xeth.XEth) *EthereumApi {
+	return &EthereumApi{xeth: xeth}
+}
+
+type EthereumApi struct {
+	xeth *xeth.XEth
+}
+
+func (p *EthereumApi) GetBlock(args *GetBlockArgs, reply *interface{}) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+
+	if args.BlockNumber > 0 {
+		*reply = p.xeth.BlockByNumber(args.BlockNumber)
+	} else {
+		*reply = p.xeth.BlockByHash(args.Hash)
+	}
+	return nil
+}
+
+func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+	result, _ := p.xeth.Transact( /* TODO specify account */ args.Recipient, args.Value, args.Gas, args.GasPrice, args.Body)
+	*reply = result
+	return nil
+}
+
+func (p *EthereumApi) Create(args *NewTxArgs, reply *interface{}) error {
+	err := args.requirementsContract()
+	if err != nil {
+		return err
+	}
+
+	result, _ := p.xeth.Transact( /* TODO specify account */ "", args.Value, args.Gas, args.GasPrice, args.Body)
+	*reply = result
+	return nil
+}
+
+func (p *EthereumApi) PushTx(args *PushTxArgs, reply *interface{}) error {
+	err := args.requirementsPushTx()
+	if err != nil {
+		return err
+	}
+	result, _ := p.xeth.PushTx(args.Tx)
+	*reply = result
+	return nil
+}
+
+func (p *EthereumApi) GetStorageAt(args *GetStorageArgs, reply *interface{}) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+
+	state := p.xeth.State().SafeGet(args.Address)
+
+	var hx string
+	if strings.Index(args.Key, "0x") == 0 {
+		hx = string([]byte(args.Key)[2:])
+	} else {
+		// Convert the incoming string (which is a bigint) into hex
+		i, _ := new(big.Int).SetString(args.Key, 10)
+		hx = ethutil.Bytes2Hex(i.Bytes())
+	}
+	rpclogger.Debugf("GetStorageAt(%s, %s)\n", args.Address, hx)
+	value := state.Storage(ethutil.Hex2Bytes(hx))
+	*reply = GetStorageAtRes{Address: args.Address, Key: args.Key, Value: value.Str()}
+	return nil
+}
+
+func (p *EthereumApi) GetPeerCount(reply *interface{}) error {
+	*reply = p.xeth.PeerCount()
+	return nil
+}
+
+func (p *EthereumApi) GetIsListening(reply *interface{}) error {
+	*reply = p.xeth.IsListening()
+	return nil
+}
+
+func (p *EthereumApi) GetCoinbase(reply *interface{}) error {
+	*reply = p.xeth.Coinbase()
+	return nil
+}
+
+func (p *EthereumApi) GetIsMining(reply *interface{}) error {
+	*reply = p.xeth.IsMining()
+	return nil
+}
+
+func (p *EthereumApi) GetTxCountAt(args *GetTxCountArgs, reply *interface{}) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+	*reply = p.xeth.TxCountAt(args.Address)
+	return nil
+}
+
+func (p *EthereumApi) GetBalanceAt(args *GetBalanceArgs, reply *interface{}) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+	state := p.xeth.State().SafeGet(args.Address)
+	*reply = BalanceRes{Balance: state.Balance().String(), Address: args.Address}
+	return nil
+}
+
+func (p *EthereumApi) GetCodeAt(args *GetCodeAtArgs, reply *interface{}) error {
+	err := args.requirements()
+	if err != nil {
+		return err
+	}
+	*reply = p.xeth.CodeAt(args.Address)
+	return nil
+}
+
+func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error {
+	// Spec at https://github.com/ethereum/wiki/wiki/Generic-ON-RPC
+	rpclogger.DebugDetailf("%T %s", req.Params, req.Params)
+	switch req.Method {
+	case "eth_coinbase":
+		return p.GetCoinbase(reply)
+	case "eth_listening":
+		return p.GetIsListening(reply)
+	case "eth_mining":
+		return p.GetIsMining(reply)
+	case "eth_peerCount":
+		return p.GetPeerCount(reply)
+	case "eth_countAt":
+		args, err := req.ToGetTxCountArgs()
+		if err != nil {
+			return err
+		}
+		return p.GetTxCountAt(args, reply)
+	case "eth_codeAt":
+		args, err := req.ToGetCodeAtArgs()
+		if err != nil {
+			return err
+		}
+		return p.GetCodeAt(args, reply)
+	case "eth_balanceAt":
+		args, err := req.ToGetBalanceArgs()
+		if err != nil {
+			return err
+		}
+		return p.GetBalanceAt(args, reply)
+	case "eth_stateAt":
+		args, err := req.ToGetStorageArgs()
+		if err != nil {
+			return err
+		}
+		return p.GetStorageAt(args, reply)
+	case "eth_blockByNumber", "eth_blockByHash":
+		args, err := req.ToGetBlockArgs()
+		if err != nil {
+			return err
+		}
+		return p.GetBlock(args, reply)
+	default:
+		return NewErrorResponse(ErrorNotImplemented)
+	}
+
+	rpclogger.DebugDetailf("Reply: %T %s", reply, reply)
+	return nil
+}
diff --git a/rpc/ws/server.go b/rpc/ws/server.go
new file mode 100644
index 000000000..37b08ebd9
--- /dev/null
+++ b/rpc/ws/server.go
@@ -0,0 +1,123 @@
+/*
+  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 ws
+
+import (
+	"fmt"
+	"net"
+	"net/http"
+
+	"code.google.com/p/go.net/websocket"
+	"github.com/ethereum/go-ethereum/eth"
+	"github.com/ethereum/go-ethereum/event/filter"
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/ethereum/go-ethereum/xeth"
+)
+
+var wslogger = logger.NewLogger("RPC-WS")
+
+type WebSocketServer struct {
+	eth           *eth.Ethereum
+	filterManager *filter.FilterManager
+	port          int
+	doneCh        chan bool
+	listener      net.Listener
+}
+
+func NewWebSocketServer(eth *eth.Ethereum, port int) (*WebSocketServer, error) {
+	sport := fmt.Sprintf(":%d", port)
+	l, err := net.Listen("tcp", sport)
+	if err != nil {
+		return nil, err
+	}
+
+	filterManager := filter.NewFilterManager(eth.EventMux())
+	go filterManager.Start()
+
+	return &WebSocketServer{eth,
+		filterManager,
+		port,
+		make(chan bool),
+		l,
+	}, nil
+}
+
+func (self *WebSocketServer) handlerLoop() {
+	for {
+		select {
+		case <-self.doneCh:
+			wslogger.Infoln("Shutdown RPC-WS server")
+			return
+		}
+	}
+}
+
+func (self *WebSocketServer) Stop() {
+	close(self.doneCh)
+}
+
+func (self *WebSocketServer) Start() {
+	wslogger.Infof("Starting RPC-WS server on port %d", self.port)
+	go self.handlerLoop()
+
+	api := rpc.NewEthereumApi(xeth.New(self.eth))
+	h := self.apiHandler(api)
+	http.Handle("/ws", h)
+
+	err := http.Serve(self.listener, nil)
+	if err != nil {
+		wslogger.Errorln("Error on RPC-WS interface:", err)
+	}
+}
+
+func (s *WebSocketServer) apiHandler(api *rpc.EthereumApi) http.Handler {
+	fn := func(w http.ResponseWriter, req *http.Request) {
+		h := sockHandler(api)
+		s := websocket.Server{Handler: h}
+		s.ServeHTTP(w, req)
+	}
+
+	return http.HandlerFunc(fn)
+}
+
+func sockHandler(api *rpc.EthereumApi) websocket.Handler {
+	fn := func(conn *websocket.Conn) {
+		for {
+			wslogger.Debugln("Handling request")
+			var reqParsed rpc.RpcRequest
+
+			if err := websocket.JSON.Receive(conn, &reqParsed); err != nil {
+				wslogger.Debugln(rpc.ErrorParseRequest)
+				websocket.JSON.Send(conn, rpc.RpcErrorResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: true, ErrorText: rpc.ErrorParseRequest})
+				continue
+			}
+
+			var response interface{}
+			reserr := api.GetRequestReply(&reqParsed, &response)
+			if reserr != nil {
+				wslogger.Errorln(reserr)
+				websocket.JSON.Send(conn, rpc.RpcErrorResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: true, ErrorText: reserr.Error()})
+				continue
+			}
+
+			wslogger.Debugf("Generated response: %T %s", response, response)
+			websocket.JSON.Send(conn, rpc.RpcSuccessResponse{JsonRpc: reqParsed.JsonRpc, ID: reqParsed.ID, Error: false, Result: response})
+		}
+	}
+	return websocket.Handler(fn)
+}