diff --git a/core/filter.go b/core/filter.go
index 0aebcbf69..99336b3b4 100644
--- a/core/filter.go
+++ b/core/filter.go
@@ -46,7 +46,7 @@ func NewFilter(eth Backend) *Filter {
 
 // SetOptions copies the filter options to the filter it self. The reason for this "silly" copy
 // is simply because named arguments in this case is extremely nice and readable.
-func (self *Filter) SetOptions(options FilterOptions) {
+func (self *Filter) SetOptions(options *FilterOptions) {
 	self.earliest = options.Earliest
 	self.latest = options.Latest
 	self.skip = options.Skip
diff --git a/event/filter/eth_filter.go b/event/filter/eth_filter.go
index ab811e90e..1abd48389 100644
--- a/event/filter/eth_filter.go
+++ b/event/filter/eth_filter.go
@@ -48,7 +48,9 @@ func (self *FilterManager) InstallFilter(filter *core.Filter) (id int) {
 func (self *FilterManager) UninstallFilter(id int) {
 	self.filterMu.Lock()
 	defer self.filterMu.Unlock()
-	delete(self.filters, id)
+	if _, ok := self.filters[id]; ok {
+		delete(self.filters, id)
+	}
 }
 
 // GetFilter retrieves a filter installed using InstallFilter.
diff --git a/rpc/api.go b/rpc/api.go
index fcf2ac9dc..548bace5c 100644
--- a/rpc/api.go
+++ b/rpc/api.go
@@ -2,494 +2,49 @@ package rpc
 
 import (
 	"encoding/json"
-	"fmt"
 	"math/big"
 	"path"
-	"strings"
 	"sync"
-	"time"
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
-	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
-	"github.com/ethereum/go-ethereum/event"
-	"github.com/ethereum/go-ethereum/event/filter"
-	"github.com/ethereum/go-ethereum/state"
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
-var (
-	defaultGasPrice  = big.NewInt(150000000000)
-	defaultGas       = big.NewInt(500000)
-	filterTickerTime = 5 * time.Minute
-)
-
 type EthereumApi struct {
 	eth    *xeth.XEth
 	xethMu sync.RWMutex
-	mux    *event.TypeMux
-
-	quit          chan struct{}
-	filterManager *filter.FilterManager
-
-	logMut sync.RWMutex
-	logs   map[int]*logFilter
-
-	messagesMut sync.RWMutex
-	messages    map[int]*whisperFilter
-	// Register keeps a list of accounts and transaction data
-	regmut   sync.Mutex
-	register map[string][]*NewTxArgs
-
-	db common.Database
+	db     common.Database
 }
 
 func NewEthereumApi(eth *xeth.XEth, dataDir string) *EthereumApi {
+	// What about when dataDir is empty?
 	db, _ := ethdb.NewLDBDatabase(path.Join(dataDir, "dapps"))
 	api := &EthereumApi{
-		eth:           eth,
-		mux:           eth.Backend().EventMux(),
-		quit:          make(chan struct{}),
-		filterManager: filter.NewFilterManager(eth.Backend().EventMux()),
-		logs:          make(map[int]*logFilter),
-		messages:      make(map[int]*whisperFilter),
-		db:            db,
+		eth: eth,
+		db:  db,
 	}
-	go api.filterManager.Start()
-	go api.start()
 
 	return api
 }
 
-func (self *EthereumApi) xethWithStateNum(num int64) *xeth.XEth {
-	chain := self.xeth().Backend().ChainManager()
-	var block *types.Block
+func (self *EthereumApi) xeth() *xeth.XEth {
+	self.xethMu.RLock()
+	defer self.xethMu.RUnlock()
 
-	if num < 0 {
-		num = chain.CurrentBlock().Number().Int64() + num + 1
-	}
-	block = chain.GetBlockByNumber(uint64(num))
-
-	var st *state.StateDB
-	if block != nil {
-		st = state.New(block.Root(), self.xeth().Backend().StateDb())
-	} else {
-		st = chain.State()
-	}
-	return self.xeth().WithState(st)
+	return self.eth
 }
 
-func (self *EthereumApi) getStateWithNum(num int64) *xeth.State {
-	return self.xethWithStateNum(num).State()
-}
-
-func (self *EthereumApi) start() {
-	timer := time.NewTicker(2 * time.Second)
-done:
-	for {
-		select {
-		case <-timer.C:
-			self.logMut.Lock()
-			self.messagesMut.Lock()
-			for id, filter := range self.logs {
-				if time.Since(filter.timeout) > filterTickerTime {
-					self.filterManager.UninstallFilter(id)
-					delete(self.logs, id)
-				}
-			}
-
-			for id, filter := range self.messages {
-				if time.Since(filter.timeout) > filterTickerTime {
-					self.xeth().Whisper().Unwatch(id)
-					delete(self.messages, id)
-				}
-			}
-			self.messagesMut.Unlock()
-			self.logMut.Unlock()
-		case <-self.quit:
-			break done
-		}
-	}
-}
-
-func (self *EthereumApi) stop() {
-	close(self.quit)
-}
-
-// func (self *EthereumApi) Register(args string, reply *interface{}) error {
-// 	self.regmut.Lock()
-// 	defer self.regmut.Unlock()
-
-// 	if _, ok := self.register[args]; ok {
-// 		self.register[args] = nil // register with empty
-// 	}
-// 	return nil
-// }
-
-// func (self *EthereumApi) Unregister(args string, reply *interface{}) error {
-// 	self.regmut.Lock()
-// 	defer self.regmut.Unlock()
-
-// 	delete(self.register, args)
-
-// 	return nil
-// }
-
-// func (self *EthereumApi) WatchTx(args string, reply *interface{}) error {
-// 	self.regmut.Lock()
-// 	defer self.regmut.Unlock()
-
-// 	txs := self.register[args]
-// 	self.register[args] = nil
-
-// 	*reply = txs
-// 	return nil
-// }
-
-func (self *EthereumApi) NewFilter(args *FilterOptions, reply *interface{}) error {
-	var id int
-	filter := core.NewFilter(self.xeth().Backend())
-	filter.SetOptions(toFilterOptions(args))
-	filter.LogsCallback = func(logs state.Logs) {
-		self.logMut.Lock()
-		defer self.logMut.Unlock()
-
-		self.logs[id].add(logs...)
-	}
-	id = self.filterManager.InstallFilter(filter)
-	self.logs[id] = &logFilter{timeout: time.Now()}
-
-	*reply = common.ToHex(big.NewInt(int64(id)).Bytes())
-
-	return nil
-}
-
-func (self *EthereumApi) UninstallFilter(id int, reply *interface{}) error {
-	if _, ok := self.logs[id]; ok {
-		delete(self.logs, id)
-	}
-
-	self.filterManager.UninstallFilter(id)
-	*reply = true
-	return nil
-}
-
-func (self *EthereumApi) NewFilterString(args *FilterStringArgs, reply *interface{}) error {
-	var id int
-	filter := core.NewFilter(self.xeth().Backend())
-
-	switch args.Word {
-	case "pending":
-		filter.PendingCallback = func(tx *types.Transaction) {
-			self.logMut.Lock()
-			defer self.logMut.Unlock()
-
-			self.logs[id].add(&state.StateLog{})
-		}
-	case "latest":
-		filter.BlockCallback = func(block *types.Block, logs state.Logs) {
-			self.logMut.Lock()
-			defer self.logMut.Unlock()
-
-			for _, log := range logs {
-				self.logs[id].add(log)
-			}
-			self.logs[id].add(&state.StateLog{})
-		}
-	default:
-		return NewValidationError("Word", "Must be `latest` or `pending`")
-	}
-
-	id = self.filterManager.InstallFilter(filter)
-	self.logs[id] = &logFilter{timeout: time.Now()}
-	*reply = common.ToHex(big.NewInt(int64(id)).Bytes())
-
-	return nil
-}
-
-func (self *EthereumApi) FilterChanged(id int, reply *interface{}) error {
-	self.logMut.Lock()
-	defer self.logMut.Unlock()
-
-	if self.logs[id] != nil {
-		*reply = toLogs(self.logs[id].get())
-	}
-
-	return nil
-}
-
-func (self *EthereumApi) Logs(id int, reply *interface{}) error {
-	self.logMut.Lock()
-	defer self.logMut.Unlock()
-
-	filter := self.filterManager.GetFilter(id)
-	if filter != nil {
-		*reply = toLogs(filter.Find())
-	}
-
-	return nil
-}
-
-func (self *EthereumApi) AllLogs(args *FilterOptions, reply *interface{}) error {
-	filter := core.NewFilter(self.xeth().Backend())
-	filter.SetOptions(toFilterOptions(args))
-
-	*reply = toLogs(filter.Find())
-
-	return nil
-}
-
-func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) (err error) {
-	// TODO if no_private_key then
-	//if _, exists := p.register[args.From]; exists {
-	//	p.register[args.From] = append(p.register[args.From], args)
-	//} else {
-	/*
-		account := accounts.Get(common.FromHex(args.From))
-		if account != nil {
-			if account.Unlocked() {
-				if !unlockAccount(account) {
-					return
-				}
-			}
-
-			result, _ := account.Transact(common.FromHex(args.To), common.FromHex(args.Value), common.FromHex(args.Gas), common.FromHex(args.GasPrice), common.FromHex(args.Data))
-			if len(result) > 0 {
-				*reply = common.ToHex(result)
-			}
-		} else if _, exists := p.register[args.From]; exists {
-			p.register[ags.From] = append(p.register[args.From], args)
-		}
-	*/
-
-	if err := args.requirements(); err != nil {
-		return err
-	}
-
-	// TODO: align default values to have the same type, e.g. not depend on
-	// common.Value conversions later on
-	if args.Gas.Cmp(big.NewInt(0)) == 0 {
-		args.Gas = defaultGas
-	}
-
-	if args.GasPrice.Cmp(big.NewInt(0)) == 0 {
-		args.GasPrice = defaultGasPrice
-	}
-
-	*reply, err = p.xeth().Transact(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
-	if err != nil {
-		fmt.Println("err:", err)
-		return err
-	}
-
-	return nil
-}
-
-func (p *EthereumApi) Call(args *NewTxArgs, reply *interface{}) error {
-	result, err := p.xethWithStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
-	if err != nil {
-		return err
-	}
-
-	*reply = result
-	return nil
-}
-
-func (p *EthereumApi) GetBalance(args *GetBalanceArgs, reply *interface{}) error {
-	if err := args.requirements(); err != nil {
-		return err
-	}
-	state := p.getStateWithNum(args.BlockNumber).SafeGet(args.Address)
-	*reply = common.ToHex(state.Balance().Bytes())
-	return nil
-}
-
-func (p *EthereumApi) GetStorage(args *GetStorageArgs, reply *interface{}) error {
-	if err := args.requirements(); err != nil {
-		return err
-	}
-	*reply = p.getStateWithNum(args.BlockNumber).SafeGet(args.Address).Storage()
-	return nil
-}
-
-func (p *EthereumApi) GetStorageAt(args *GetStorageAtArgs, reply *interface{}) error {
-	if err := args.requirements(); err != nil {
-		return err
-	}
-	state := p.getStateWithNum(args.BlockNumber).SafeGet(args.Address)
-
-	value := state.StorageString(args.Key)
-	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 = common.Bytes2Hex(i.Bytes())
-	}
-	rpclogger.Debugf("GetStateAt(%s, %s)\n", args.Address, hx)
-	*reply = map[string]string{args.Key: value.Str()}
-	return nil
-}
-
-func (p *EthereumApi) GetTxCountAt(args *GetTxCountArgs, reply *interface{}) error {
-	err := args.requirements()
-	if err != nil {
-		return err
-	}
-	*reply = p.xethWithStateNum(args.BlockNumber).TxCountAt(args.Address)
-	return nil
-}
-
-func (p *EthereumApi) GetData(args *GetDataArgs, reply *interface{}) error {
-	if err := args.requirements(); err != nil {
-		return err
-	}
-	*reply = p.xethWithStateNum(args.BlockNumber).CodeAt(args.Address)
-	return nil
-}
-
-func (p *EthereumApi) GetCompilers(reply *interface{}) error {
-	c := []string{""}
-	*reply = c
-	return nil
-}
-
-func (p *EthereumApi) DbPut(args *DbArgs, reply *interface{}) error {
-	if err := args.requirements(); err != nil {
-		return err
-	}
-
-	p.db.Put([]byte(args.Database+args.Key), []byte(args.Value))
-	*reply = true
-	return nil
-}
-
-func (p *EthereumApi) DbGet(args *DbArgs, reply *interface{}) error {
-	if err := args.requirements(); err != nil {
-		return err
-	}
-
-	res, _ := p.db.Get([]byte(args.Database + args.Key))
-	*reply = string(res)
-	return nil
-}
-
-func (p *EthereumApi) NewWhisperIdentity(reply *interface{}) error {
-	*reply = p.xeth().Whisper().NewIdentity()
-	return nil
-}
-
-// func (p *EthereumApi) RemoveWhisperIdentity(args *WhisperIdentityArgs, reply *interface{}) error {
-// 	*reply = p.xeth().Whisper().RemoveIdentity(args.Identity)
-// 	return nil
-// }
-
-func (p *EthereumApi) NewWhisperFilter(args *WhisperFilterArgs, reply *interface{}) error {
-	var id int
-	opts := new(xeth.Options)
-	opts.From = args.From
-	opts.To = args.To
-	opts.Topics = args.Topics
-	opts.Fn = func(msg xeth.WhisperMessage) {
-		p.messagesMut.Lock()
-		defer p.messagesMut.Unlock()
-		p.messages[id].add(msg) // = append(p.messages[id], msg)
-	}
-	id = p.xeth().Whisper().Watch(opts)
-	p.messages[id] = &whisperFilter{timeout: time.Now()}
-	*reply = common.ToHex(big.NewInt(int64(id)).Bytes())
-	return nil
-}
-
-func (p *EthereumApi) UninstallWhisperFilter(id int, reply *interface{}) error {
-	delete(p.messages, id)
-	*reply = true
-	return nil
-}
-
-func (self *EthereumApi) MessagesChanged(id int, reply *interface{}) error {
-	self.messagesMut.Lock()
-	defer self.messagesMut.Unlock()
-
-	if self.messages[id] != nil {
-		*reply = self.messages[id].get()
-	}
-
-	return nil
-}
-
-func (p *EthereumApi) WhisperPost(args *WhisperMessageArgs, reply *interface{}) error {
-	err := p.xeth().Whisper().Post(args.Payload, args.To, args.From, args.Topics, args.Priority, args.Ttl)
-	if err != nil {
-		return err
-	}
-
-	*reply = true
-	return nil
-}
-
-func (p *EthereumApi) HasWhisperIdentity(args string, reply *interface{}) error {
-	*reply = p.xeth().Whisper().HasIdentity(args)
-	return nil
-}
-
-func (p *EthereumApi) WhisperMessages(id int, reply *interface{}) error {
-	*reply = p.xeth().Whisper().Messages(id)
-	return nil
-}
-
-func (p *EthereumApi) GetTransactionByHash(hash string, reply *interface{}) error {
-	tx := p.xeth().EthTransactionByHash(hash)
-	if tx != nil {
-		*reply = NewTransactionRes(tx)
-	}
-	return nil
-}
-
-func (p *EthereumApi) GetBlockByHash(blockhash string, includetx bool) (*BlockRes, error) {
-	block := p.xeth().EthBlockByHash(blockhash)
-	br := NewBlockRes(block)
-	br.fullTx = includetx
-	return br, nil
-}
-
-func (p *EthereumApi) GetBlockByNumber(blocknum int64, includetx bool) (*BlockRes, error) {
-	block := p.xeth().EthBlockByNumber(blocknum)
-	br := NewBlockRes(block)
-	br.fullTx = includetx
-	return br, nil
-}
-
-func (p *EthereumApi) GetBlockTransactionCountByHash(blockhash string) (int64, error) {
-	block := p.xeth().EthBlockByHash(blockhash)
-	br := NewBlockRes(block)
-	return int64(len(br.Transactions)), nil
-}
-
-func (p *EthereumApi) GetBlockTransactionCountByNumber(blocknum int64) (int64, error) {
-	block := p.xeth().EthBlockByNumber(blocknum)
-	br := NewBlockRes(block)
-	return int64(len(br.Transactions)), nil
-}
-
-func (p *EthereumApi) GetBlockUncleCountByHash(blockhash string) (int64, error) {
-	block := p.xeth().EthBlockByHash(blockhash)
-	br := NewBlockRes(block)
-	return int64(len(br.Uncles)), nil
-}
-
-func (p *EthereumApi) GetBlockUncleCountByNumber(blocknum int64) (int64, error) {
-	block := p.xeth().EthBlockByNumber(blocknum)
-	br := NewBlockRes(block)
-	return int64(len(br.Uncles)), nil
+func (self *EthereumApi) xethAtStateNum(num int64) *xeth.XEth {
+	return self.xeth().AtStateNum(num)
 }
 
 func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error {
 	// Spec at https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC
 	rpclogger.Debugf("%s %s", req.Method, req.Params)
+
 	switch req.Method {
 	case "web3_sha3":
 		args := new(Sha3Args)
@@ -504,7 +59,8 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 	case "net_listening":
 		*reply = p.xeth().IsListening()
 	case "net_peerCount":
-		*reply = common.ToHex(big.NewInt(int64(p.xeth().PeerCount())).Bytes())
+		v := p.xeth().PeerCount()
+		*reply = common.ToHex(big.NewInt(int64(v)).Bytes())
 	case "eth_coinbase":
 		// TODO handling of empty coinbase due to lack of accounts
 		res := p.xeth().Coinbase()
@@ -516,97 +72,131 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 	case "eth_mining":
 		*reply = p.xeth().IsMining()
 	case "eth_gasPrice":
-		*reply = common.ToHex(defaultGasPrice.Bytes())
+		v := p.xeth().DefaultGas()
+		*reply = common.ToHex(v.Bytes())
 	case "eth_accounts":
 		*reply = p.xeth().Accounts()
 	case "eth_blockNumber":
-		*reply = common.ToHex(p.xeth().Backend().ChainManager().CurrentBlock().Number().Bytes())
+		v := p.xeth().Backend().ChainManager().CurrentBlock().Number()
+		*reply = common.ToHex(v.Bytes())
 	case "eth_getBalance":
 		args := new(GetBalanceArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.GetBalance(args, reply)
+
+		if err := args.requirements(); err != nil {
+			return err
+		}
+
+		v := p.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address).Balance()
+		*reply = common.ToHex(v.Bytes())
 	case "eth_getStorage", "eth_storageAt":
 		args := new(GetStorageArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.GetStorage(args, reply)
+
+		if err := args.requirements(); err != nil {
+			return err
+		}
+
+		*reply = p.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address).Storage()
 	case "eth_getStorageAt":
 		args := new(GetStorageAtArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.GetStorageAt(args, reply)
+		if err := args.requirements(); err != nil {
+			return err
+		}
+
+		state := p.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address)
+		value := state.StorageString(args.Key)
+
+		*reply = common.Bytes2Hex(value.Bytes())
 	case "eth_getTransactionCount":
 		args := new(GetTxCountArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.GetTxCountAt(args, reply)
+
+		err := args.requirements()
+		if err != nil {
+			return err
+		}
+
+		*reply = p.xethAtStateNum(args.BlockNumber).TxCountAt(args.Address)
 	case "eth_getBlockTransactionCountByHash":
 		args := new(GetBlockByHashArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		v, err := p.GetBlockTransactionCountByHash(args.BlockHash)
-		if err != nil {
-			return err
-		}
-		*reply = common.ToHex(big.NewInt(v).Bytes())
+		block := NewBlockRes(p.xeth().EthBlockByHash(args.BlockHash))
+		*reply = common.ToHex(big.NewInt(int64(len(block.Transactions))).Bytes())
 	case "eth_getBlockTransactionCountByNumber":
 		args := new(GetBlockByNumberArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		v, err := p.GetBlockTransactionCountByNumber(args.BlockNumber)
-		if err != nil {
-			return err
-		}
-		*reply = common.ToHex(big.NewInt(v).Bytes())
+		block := NewBlockRes(p.xeth().EthBlockByNumber(args.BlockNumber))
+		*reply = common.ToHex(big.NewInt(int64(len(block.Transactions))).Bytes())
 	case "eth_getUncleCountByBlockHash":
 		args := new(GetBlockByHashArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		v, err := p.GetBlockUncleCountByHash(args.BlockHash)
-		if err != nil {
-			return err
-		}
-		*reply = common.ToHex(big.NewInt(v).Bytes())
+		block := p.xeth().EthBlockByHash(args.BlockHash)
+		br := NewBlockRes(block)
+		*reply = common.ToHex(big.NewInt(int64(len(br.Uncles))).Bytes())
 	case "eth_getUncleCountByBlockNumber":
 		args := new(GetBlockByNumberArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		v, err := p.GetBlockUncleCountByNumber(args.BlockNumber)
-		if err != nil {
-			return err
-		}
-		*reply = common.ToHex(big.NewInt(v).Bytes())
+		block := p.xeth().EthBlockByNumber(args.BlockNumber)
+		br := NewBlockRes(block)
+		*reply = common.ToHex(big.NewInt(int64(len(br.Uncles))).Bytes())
 	case "eth_getData", "eth_getCode":
 		args := new(GetDataArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.GetData(args, reply)
+		if err := args.requirements(); err != nil {
+			return err
+		}
+		*reply = p.xethAtStateNum(args.BlockNumber).CodeAt(args.Address)
 	case "eth_sendTransaction", "eth_transact":
 		args := new(NewTxArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.Transact(args, reply)
+
+		if err := args.requirements(); err != nil {
+			return err
+		}
+
+		v, err := p.xeth().Transact(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
+		if err != nil {
+			return err
+		}
+		*reply = v
 	case "eth_call":
 		args := new(NewTxArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.Call(args, reply)
+
+		v, err := p.xethAtStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
+		if err != nil {
+			return err
+		}
+
+		*reply = v
 	case "eth_flush":
 		return NewNotImplementedError(req.Method)
 	case "eth_getBlockByHash":
@@ -615,52 +205,55 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 			return err
 		}
 
-		v, err := p.GetBlockByHash(args.BlockHash, args.Transactions)
-		if err != nil {
-			return err
-		}
-		*reply = v
+		block := p.xeth().EthBlockByHash(args.BlockHash)
+		br := NewBlockRes(block)
+		br.fullTx = args.IncludeTxs
+
+		*reply = br
 	case "eth_getBlockByNumber":
 		args := new(GetBlockByNumberArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		v, err := p.GetBlockByNumber(args.BlockNumber, args.Transactions)
-		if err != nil {
-			return err
-		}
-		*reply = v
+		block := p.xeth().EthBlockByNumber(args.BlockNumber)
+		br := NewBlockRes(block)
+		br.fullTx = args.IncludeTxs
+
+		*reply = br
 	case "eth_getTransactionByHash":
 		// HashIndexArgs used, but only the "Hash" part we need.
 		args := new(HashIndexArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 		}
-		return p.GetTransactionByHash(args.Hash, reply)
+		tx := p.xeth().EthTransactionByHash(args.Hash)
+		if tx != nil {
+			*reply = NewTransactionRes(tx)
+		}
 	case "eth_getTransactionByBlockHashAndIndex":
 		args := new(HashIndexArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		v, err := p.GetBlockByHash(args.Hash, true)
-		if err != nil {
-			return err
-		}
-		if args.Index > int64(len(v.Transactions)) || args.Index < 0 {
+		block := p.xeth().EthBlockByHash(args.Hash)
+		br := NewBlockRes(block)
+		br.fullTx = true
+
+		if args.Index > int64(len(br.Transactions)) || args.Index < 0 {
 			return NewValidationError("Index", "does not exist")
 		}
-		*reply = v.Transactions[args.Index]
+		*reply = br.Transactions[args.Index]
 	case "eth_getTransactionByBlockNumberAndIndex":
 		args := new(BlockNumIndexArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
 
-		v, err := p.GetBlockByNumber(args.BlockNumber, true)
-		if err != nil {
-			return err
-		}
+		block := p.xeth().EthBlockByNumber(args.BlockNumber)
+		v := NewBlockRes(block)
+		v.fullTx = true
+
 		if args.Index > int64(len(v.Transactions)) || args.Index < 0 {
 			return NewValidationError("Index", "does not exist")
 		}
@@ -671,18 +264,15 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 			return err
 		}
 
-		v, err := p.GetBlockByHash(args.Hash, false)
-		if err != nil {
-			return err
-		}
-		if args.Index > int64(len(v.Uncles)) || args.Index < 0 {
+		br := NewBlockRes(p.xeth().EthBlockByHash(args.Hash))
+
+		if args.Index > int64(len(br.Uncles)) || args.Index < 0 {
 			return NewValidationError("Index", "does not exist")
 		}
 
-		uncle, err := p.GetBlockByHash(common.ToHex(v.Uncles[args.Index]), false)
-		if err != nil {
-			return err
-		}
+		uhash := common.ToHex(br.Uncles[args.Index])
+		uncle := NewBlockRes(p.xeth().EthBlockByHash(uhash))
+
 		*reply = uncle
 	case "eth_getUncleByBlockNumberAndIndex":
 		args := new(BlockNumIndexArgs)
@@ -690,59 +280,68 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 			return err
 		}
 
-		v, err := p.GetBlockByNumber(args.BlockNumber, true)
-		if err != nil {
-			return err
-		}
+		block := p.xeth().EthBlockByNumber(args.BlockNumber)
+		v := NewBlockRes(block)
+		v.fullTx = true
+
 		if args.Index > int64(len(v.Uncles)) || args.Index < 0 {
 			return NewValidationError("Index", "does not exist")
 		}
 
-		uncle, err := p.GetBlockByHash(common.ToHex(v.Uncles[args.Index]), false)
-		if err != nil {
-			return err
-		}
+		uhash := common.ToHex(v.Uncles[args.Index])
+		uncle := NewBlockRes(p.xeth().EthBlockByHash(uhash))
+
 		*reply = uncle
 	case "eth_getCompilers":
-		return p.GetCompilers(reply)
+		c := []string{""}
+		*reply = c
 	case "eth_compileSolidity", "eth_compileLLL", "eth_compileSerpent":
 		return NewNotImplementedError(req.Method)
 	case "eth_newFilter":
-		args := new(FilterOptions)
+		args := new(BlockFilterArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.NewFilter(args, reply)
+
+		opts := toFilterOptions(args)
+		id := p.xeth().RegisterFilter(opts)
+		*reply = common.ToHex(big.NewInt(int64(id)).Bytes())
 	case "eth_newBlockFilter":
 		args := new(FilterStringArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.NewFilterString(args, reply)
+		if err := args.requirements(); err != nil {
+			return err
+		}
+
+		id := p.xeth().NewFilterString(args.Word)
+		*reply = common.ToHex(big.NewInt(int64(id)).Bytes())
 	case "eth_uninstallFilter":
 		args := new(FilterIdArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.UninstallFilter(args.Id, reply)
+		*reply = p.xeth().UninstallFilter(args.Id)
 	case "eth_getFilterChanges":
 		args := new(FilterIdArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.FilterChanged(args.Id, reply)
+		*reply = NewLogsRes(p.xeth().FilterChanged(args.Id))
 	case "eth_getFilterLogs":
 		args := new(FilterIdArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.Logs(args.Id, reply)
+		*reply = NewLogsRes(p.xeth().Logs(args.Id))
 	case "eth_getLogs":
-		args := new(FilterOptions)
+		args := new(BlockFilterArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.AllLogs(args, reply)
+		opts := toFilterOptions(args)
+		*reply = NewLogsRes(p.xeth().AllLogs(opts))
 	case "eth_getWork", "eth_submitWork":
 		return NewNotImplementedError(req.Method)
 	case "db_putString":
@@ -750,13 +349,25 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.DbPut(args, reply)
+
+		if err := args.requirements(); err != nil {
+			return err
+		}
+
+		p.db.Put([]byte(args.Database+args.Key), []byte(args.Value))
+		*reply = true
 	case "db_getString":
 		args := new(DbArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.DbGet(args, reply)
+
+		if err := args.requirements(); err != nil {
+			return err
+		}
+
+		res, _ := p.db.Get([]byte(args.Database + args.Key))
+		*reply = string(res)
 	case "db_putHex", "db_getHex":
 		return NewNotImplementedError(req.Method)
 	case "shh_post":
@@ -764,21 +375,27 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.WhisperPost(args, reply)
+
+		err := p.xeth().Whisper().Post(args.Payload, args.To, args.From, args.Topics, args.Priority, args.Ttl)
+		if err != nil {
+			return err
+		}
+
+		*reply = true
 	case "shh_newIdentity":
-		return p.NewWhisperIdentity(reply)
+		*reply = p.xeth().Whisper().NewIdentity()
 	// case "shh_removeIdentity":
 	// 	args := new(WhisperIdentityArgs)
 	// 	if err := json.Unmarshal(req.Params, &args); err != nil {
 	// 		return err
 	// 	}
-	// 	return p.RemoveWhisperIdentity(args, reply)
+	// 	*reply = p.xeth().Whisper().RemoveIdentity(args.Identity)
 	case "shh_hasIdentity":
 		args := new(WhisperIdentityArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.HasWhisperIdentity(args.Identity, reply)
+		*reply = p.xeth().Whisper().HasIdentity(args.Identity)
 	case "shh_newGroup", "shh_addToGroup":
 		return NewNotImplementedError(req.Method)
 	case "shh_newFilter":
@@ -786,43 +403,49 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.NewWhisperFilter(args, reply)
+		opts := new(xeth.Options)
+		opts.From = args.From
+		opts.To = args.To
+		opts.Topics = args.Topics
+		id := p.xeth().NewWhisperFilter(opts)
+		*reply = common.ToHex(big.NewInt(int64(id)).Bytes())
 	case "shh_uninstallFilter":
 		args := new(FilterIdArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.UninstallWhisperFilter(args.Id, reply)
+		*reply = p.xeth().UninstallWhisperFilter(args.Id)
 	case "shh_getFilterChanges":
 		args := new(FilterIdArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.MessagesChanged(args.Id, reply)
+		*reply = p.xeth().MessagesChanged(args.Id)
 	case "shh_getMessages":
 		args := new(FilterIdArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
 			return err
 		}
-		return p.WhisperMessages(args.Id, reply)
+		*reply = p.xeth().Whisper().Messages(args.Id)
 	// case "eth_register":
-	// 	args, err := req.ToRegisterArgs()
-	// 	if err != nil {
+	// 	// Placeholder for actual type
+	// 	args := new(HashIndexArgs)
+	// 	if err := json.Unmarshal(req.Params, &args); err != nil {
 	// 		return err
 	// 	}
-	// 	return p.Register(args, reply)
+	// 	*reply = p.xeth().Register(args.Hash)
 	// case "eth_unregister":
-	// 	args, err := req.ToRegisterArgs()
-	// 	if err != nil {
+	// 	args := new(HashIndexArgs)
+	// 	if err := json.Unmarshal(req.Params, &args); err != nil {
 	// 		return err
 	// 	}
-	// 	return p.Unregister(args, reply)
+	// 	*reply = p.xeth().Unregister(args.Hash)
 	// case "eth_watchTx":
-	// 	args, err := req.ToWatchTxArgs()
-	// 	if err != nil {
+	// 	args := new(HashIndexArgs)
+	// 	if err := json.Unmarshal(req.Params, &args); err != nil {
 	// 		return err
 	// 	}
-	// 	return p.WatchTx(args, reply)
+	// 	*reply = p.xeth().PullWatchTx(args.Hash)
 	default:
 		return NewNotImplementedError(req.Method)
 	}
@@ -831,14 +454,7 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 	return nil
 }
 
-func (self *EthereumApi) xeth() *xeth.XEth {
-	self.xethMu.RLock()
-	defer self.xethMu.RUnlock()
-
-	return self.eth
-}
-
-func toFilterOptions(options *FilterOptions) core.FilterOptions {
+func toFilterOptions(options *BlockFilterArgs) *core.FilterOptions {
 	var opts core.FilterOptions
 
 	// Convert optional address slice/string to byte slice
@@ -871,5 +487,5 @@ func toFilterOptions(options *FilterOptions) core.FilterOptions {
 	}
 	opts.Topics = topics
 
-	return opts
+	return &opts
 }
diff --git a/rpc/api_test.go b/rpc/api_test.go
index ec03822c5..727ade007 100644
--- a/rpc/api_test.go
+++ b/rpc/api_test.go
@@ -2,9 +2,9 @@ package rpc
 
 import (
 	"encoding/json"
-	"sync"
+	// "sync"
 	"testing"
-	"time"
+	// "time"
 )
 
 func TestWeb3Sha3(t *testing.T) {
@@ -24,33 +24,33 @@ func TestWeb3Sha3(t *testing.T) {
 	}
 }
 
-func TestFilterClose(t *testing.T) {
-	t.Skip()
-	api := &EthereumApi{
-		logs:     make(map[int]*logFilter),
-		messages: make(map[int]*whisperFilter),
-		quit:     make(chan struct{}),
-	}
+// func TestFilterClose(t *testing.T) {
+// 	t.Skip()
+// 	api := &EthereumApi{
+// 		logs:     make(map[int]*logFilter),
+// 		messages: make(map[int]*whisperFilter),
+// 		quit:     make(chan struct{}),
+// 	}
 
-	filterTickerTime = 1
-	api.logs[0] = &logFilter{}
-	api.messages[0] = &whisperFilter{}
-	var wg sync.WaitGroup
-	wg.Add(1)
-	go api.start()
-	go func() {
-		select {
-		case <-time.After(500 * time.Millisecond):
-			api.stop()
-			wg.Done()
-		}
-	}()
-	wg.Wait()
-	if len(api.logs) != 0 {
-		t.Error("expected logs to be empty")
-	}
+// 	filterTickerTime = 1
+// 	api.logs[0] = &logFilter{}
+// 	api.messages[0] = &whisperFilter{}
+// 	var wg sync.WaitGroup
+// 	wg.Add(1)
+// 	go api.start()
+// 	go func() {
+// 		select {
+// 		case <-time.After(500 * time.Millisecond):
+// 			api.stop()
+// 			wg.Done()
+// 		}
+// 	}()
+// 	wg.Wait()
+// 	if len(api.logs) != 0 {
+// 		t.Error("expected logs to be empty")
+// 	}
 
-	if len(api.messages) != 0 {
-		t.Error("expected messages to be empty")
-	}
-}
+// 	if len(api.messages) != 0 {
+// 		t.Error("expected messages to be empty")
+// 	}
+// }
diff --git a/rpc/args.go b/rpc/args.go
index ab1c40585..e50c9b1f5 100644
--- a/rpc/args.go
+++ b/rpc/args.go
@@ -35,8 +35,8 @@ func blockAge(raw interface{}, number *int64) (err error) {
 }
 
 type GetBlockByHashArgs struct {
-	BlockHash    string
-	Transactions bool
+	BlockHash  string
+	IncludeTxs bool
 }
 
 func (args *GetBlockByHashArgs) UnmarshalJSON(b []byte) (err error) {
@@ -57,15 +57,15 @@ func (args *GetBlockByHashArgs) UnmarshalJSON(b []byte) (err error) {
 	args.BlockHash = argstr
 
 	if len(obj) > 1 {
-		args.Transactions = obj[1].(bool)
+		args.IncludeTxs = obj[1].(bool)
 	}
 
 	return nil
 }
 
 type GetBlockByNumberArgs struct {
-	BlockNumber  int64
-	Transactions bool
+	BlockNumber int64
+	IncludeTxs  bool
 }
 
 func (args *GetBlockByNumberArgs) UnmarshalJSON(b []byte) (err error) {
@@ -86,7 +86,7 @@ func (args *GetBlockByNumberArgs) UnmarshalJSON(b []byte) (err error) {
 	}
 
 	if len(obj) > 1 {
-		args.Transactions = obj[1].(bool)
+		args.IncludeTxs = obj[1].(bool)
 	}
 
 	return nil
@@ -433,7 +433,7 @@ func (args *Sha3Args) UnmarshalJSON(b []byte) (err error) {
 	return nil
 }
 
-type FilterOptions struct {
+type BlockFilterArgs struct {
 	Earliest int64
 	Latest   int64
 	Address  interface{}
@@ -442,7 +442,7 @@ type FilterOptions struct {
 	Max      int
 }
 
-func (args *FilterOptions) UnmarshalJSON(b []byte) (err error) {
+func (args *BlockFilterArgs) UnmarshalJSON(b []byte) (err error) {
 	var obj []struct {
 		FromBlock interface{}   `json:"fromBlock"`
 		ToBlock   interface{}   `json:"toBlock"`
@@ -609,6 +609,16 @@ func (args *FilterStringArgs) UnmarshalJSON(b []byte) (err error) {
 	return nil
 }
 
+func (args *FilterStringArgs) requirements() error {
+	switch args.Word {
+	case "latest", "pending":
+		break
+	default:
+		return NewValidationError("Word", "Must be `latest` or `pending`")
+	}
+	return nil
+}
+
 type FilterIdArgs struct {
 	Id int
 }
diff --git a/rpc/args_test.go b/rpc/args_test.go
index 0d8dc4085..cfdd278b8 100644
--- a/rpc/args_test.go
+++ b/rpc/args_test.go
@@ -82,7 +82,7 @@ func TestGetBlockByHashArgs(t *testing.T) {
 	input := `["0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331", true]`
 	expected := new(GetBlockByHashArgs)
 	expected.BlockHash = "0xe670ec64341771606e55d6b4ca35a1a6b75ee3d5145a99d05921026d1527331"
-	expected.Transactions = true
+	expected.IncludeTxs = true
 
 	args := new(GetBlockByHashArgs)
 	if err := json.Unmarshal([]byte(input), &args); err != nil {
@@ -93,8 +93,8 @@ func TestGetBlockByHashArgs(t *testing.T) {
 		t.Errorf("BlockHash should be %v but is %v", expected.BlockHash, args.BlockHash)
 	}
 
-	if args.Transactions != expected.Transactions {
-		t.Errorf("Transactions should be %v but is %v", expected.Transactions, args.Transactions)
+	if args.IncludeTxs != expected.IncludeTxs {
+		t.Errorf("IncludeTxs should be %v but is %v", expected.IncludeTxs, args.IncludeTxs)
 	}
 }
 
@@ -112,7 +112,7 @@ func TestGetBlockByNumberArgs(t *testing.T) {
 	input := `["0x1b4", false]`
 	expected := new(GetBlockByNumberArgs)
 	expected.BlockNumber = 436
-	expected.Transactions = false
+	expected.IncludeTxs = false
 
 	args := new(GetBlockByNumberArgs)
 	if err := json.Unmarshal([]byte(input), &args); err != nil {
@@ -123,8 +123,8 @@ func TestGetBlockByNumberArgs(t *testing.T) {
 		t.Errorf("BlockHash should be %v but is %v", expected.BlockNumber, args.BlockNumber)
 	}
 
-	if args.Transactions != expected.Transactions {
-		t.Errorf("Transactions should be %v but is %v", expected.Transactions, args.Transactions)
+	if args.IncludeTxs != expected.IncludeTxs {
+		t.Errorf("IncludeTxs should be %v but is %v", expected.IncludeTxs, args.IncludeTxs)
 	}
 }
 
@@ -388,7 +388,7 @@ func TestGetDataEmptyArgs(t *testing.T) {
 	}
 }
 
-func TestFilterOptions(t *testing.T) {
+func TestBlockFilterArgs(t *testing.T) {
 	input := `[{
   "fromBlock": "0x1",
   "toBlock": "0x2",
@@ -396,7 +396,7 @@ func TestFilterOptions(t *testing.T) {
   "offset": "0x0",
   "address": "0xd5677cf67b5aa051bb40496e68ad359eb97cfbf8",
   "topics": ["0x12341234"]}]`
-	expected := new(FilterOptions)
+	expected := new(BlockFilterArgs)
 	expected.Earliest = 1
 	expected.Latest = 2
 	expected.Max = 3
@@ -404,7 +404,7 @@ func TestFilterOptions(t *testing.T) {
 	expected.Address = "0xd5677cf67b5aa051bb40496e68ad359eb97cfbf8"
 	// expected.Topics = []string{"0x12341234"}
 
-	args := new(FilterOptions)
+	args := new(BlockFilterArgs)
 	if err := json.Unmarshal([]byte(input), &args); err != nil {
 		t.Error(err)
 	}
@@ -434,16 +434,16 @@ func TestFilterOptions(t *testing.T) {
 	// }
 }
 
-func TestFilterOptionsWords(t *testing.T) {
+func TestBlockFilterArgsWords(t *testing.T) {
 	input := `[{
   "fromBlock": "latest",
   "toBlock": "pending"
   }]`
-	expected := new(FilterOptions)
+	expected := new(BlockFilterArgs)
 	expected.Earliest = 0
 	expected.Latest = -1
 
-	args := new(FilterOptions)
+	args := new(BlockFilterArgs)
 	if err := json.Unmarshal([]byte(input), &args); err != nil {
 		t.Error(err)
 	}
@@ -457,13 +457,13 @@ func TestFilterOptionsWords(t *testing.T) {
 	}
 }
 
-func TestFilterOptionsNums(t *testing.T) {
+func TestBlockFilterArgsNums(t *testing.T) {
 	input := `[{
   "fromBlock": 2,
   "toBlock": 3
   }]`
 
-	args := new(FilterOptions)
+	args := new(BlockFilterArgs)
 	err := json.Unmarshal([]byte(input), &args)
 	switch err.(type) {
 	case *DecodeParamError:
@@ -474,10 +474,10 @@ func TestFilterOptionsNums(t *testing.T) {
 
 }
 
-func TestFilterOptionsEmptyArgs(t *testing.T) {
+func TestBlockFilterArgsEmptyArgs(t *testing.T) {
 	input := `[]`
 
-	args := new(FilterOptions)
+	args := new(BlockFilterArgs)
 	err := json.Unmarshal([]byte(input), &args)
 	if err == nil {
 		t.Error("Expected error but didn't get one")
diff --git a/rpc/http.go b/rpc/http.go
index 5f2445e6c..3dfb67781 100644
--- a/rpc/http.go
+++ b/rpc/http.go
@@ -10,7 +10,7 @@ import (
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
-var rpchttplogger = logger.NewLogger("RPC-HTTP")
+var rpclogger = logger.NewLogger("RPC")
 
 const (
 	jsonrpcver       = "2.0"
@@ -28,7 +28,7 @@ func JSONRPC(pipe *xeth.XEth, dataDir string) http.Handler {
 		// Limit request size to resist DoS
 		if req.ContentLength > maxSizeReqLength {
 			jsonerr := &RpcErrorObject{-32700, "Request too large"}
-			Send(w, &RpcErrorResponse{Jsonrpc: jsonrpcver, Id: nil, Error: jsonerr})
+			send(w, &RpcErrorResponse{Jsonrpc: jsonrpcver, Id: nil, Error: jsonerr})
 			return
 		}
 
@@ -37,14 +37,14 @@ func JSONRPC(pipe *xeth.XEth, dataDir string) http.Handler {
 		body, err := ioutil.ReadAll(req.Body)
 		if err != nil {
 			jsonerr := &RpcErrorObject{-32700, "Could not read request body"}
-			Send(w, &RpcErrorResponse{Jsonrpc: jsonrpcver, Id: nil, Error: jsonerr})
+			send(w, &RpcErrorResponse{Jsonrpc: jsonrpcver, Id: nil, Error: jsonerr})
 		}
 
 		// Try to parse the request as a single
 		var reqSingle RpcRequest
 		if err := json.Unmarshal(body, &reqSingle); err == nil {
 			response := RpcResponse(api, &reqSingle)
-			Send(w, &response)
+			send(w, &response)
 			return
 		}
 
@@ -57,13 +57,13 @@ func JSONRPC(pipe *xeth.XEth, dataDir string) http.Handler {
 				response := RpcResponse(api, &request)
 				resBatch[i] = response
 			}
-			Send(w, resBatch)
+			send(w, resBatch)
 			return
 		}
 
 		// Not a batch or single request, error
 		jsonerr := &RpcErrorObject{-32600, "Could not decode request"}
-		Send(w, &RpcErrorResponse{Jsonrpc: jsonrpcver, Id: nil, Error: jsonerr})
+		send(w, &RpcErrorResponse{Jsonrpc: jsonrpcver, Id: nil, Error: jsonerr})
 	})
 }
 
@@ -84,11 +84,11 @@ func RpcResponse(api *EthereumApi, request *RpcRequest) *interface{} {
 		response = &RpcErrorResponse{Jsonrpc: jsonrpcver, Id: request.Id, Error: jsonerr}
 	}
 
-	rpchttplogger.DebugDetailf("Generated response: %T %s", response, response)
+	rpclogger.DebugDetailf("Generated response: %T %s", response, response)
 	return &response
 }
 
-func Send(writer io.Writer, v interface{}) (n int, err error) {
+func send(writer io.Writer, v interface{}) (n int, err error) {
 	var payload []byte
 	payload, err = json.MarshalIndent(v, "", "\t")
 	if err != nil {
diff --git a/rpc/messages_test.go b/rpc/messages_test.go
new file mode 100644
index 000000000..5274c91e4
--- /dev/null
+++ b/rpc/messages_test.go
@@ -0,0 +1,41 @@
+package rpc
+
+import (
+	"testing"
+)
+
+func TestInsufficientParamsError(t *testing.T) {
+	err := NewInsufficientParamsError(0, 1)
+	expected := "insufficient params, want 1 have 0"
+
+	if err.Error() != expected {
+		t.Error(err.Error())
+	}
+}
+
+func TestNotImplementedError(t *testing.T) {
+	err := NewNotImplementedError("foo")
+	expected := "foo method not implemented"
+
+	if err.Error() != expected {
+		t.Error(err.Error())
+	}
+}
+
+func TestDecodeParamError(t *testing.T) {
+	err := NewDecodeParamError("foo")
+	expected := "could not decode, foo"
+
+	if err.Error() != expected {
+		t.Error(err.Error())
+	}
+}
+
+func TestValidationError(t *testing.T) {
+	err := NewValidationError("foo", "should be `bar`")
+	expected := "foo not valid, should be `bar`"
+
+	if err.Error() != expected {
+		t.Error(err.Error())
+	}
+}
diff --git a/rpc/responses.go b/rpc/responses.go
index eec483fb7..a3613f380 100644
--- a/rpc/responses.go
+++ b/rpc/responses.go
@@ -7,6 +7,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/state"
 )
 
 type BlockRes struct {
@@ -211,3 +212,28 @@ type FilterWhisperRes struct {
 	Payload    string `json:"payload"`
 	WorkProved string `json:"workProved"`
 }
+
+type LogRes struct {
+	Address string   `json:"address"`
+	Topic   []string `json:"topic"`
+	Data    string   `json:"data"`
+	Number  uint64   `json:"number"`
+}
+
+func NewLogsRes(logs state.Logs) (ls []LogRes) {
+	ls = make([]LogRes, len(logs))
+
+	for i, log := range logs {
+		var l LogRes
+		l.Topic = make([]string, len(log.Topics()))
+		l.Address = common.ToHex(log.Address())
+		l.Data = common.ToHex(log.Data())
+		l.Number = log.Number()
+		for j, topic := range log.Topics() {
+			l.Topic[j] = common.ToHex(topic)
+		}
+		ls[i] = l
+	}
+
+	return
+}
diff --git a/rpc/util.go b/rpc/util.go
deleted file mode 100644
index 0798ae1d2..000000000
--- a/rpc/util.go
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
-	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 (
-	"time"
-
-	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/logger"
-	"github.com/ethereum/go-ethereum/state"
-	"github.com/ethereum/go-ethereum/xeth"
-)
-
-var rpclogger = logger.NewLogger("RPC")
-
-type Log struct {
-	Address string   `json:"address"`
-	Topic   []string `json:"topic"`
-	Data    string   `json:"data"`
-	Number  uint64   `json:"number"`
-}
-
-func toLogs(logs state.Logs) (ls []Log) {
-	ls = make([]Log, len(logs))
-
-	for i, log := range logs {
-		var l Log
-		l.Topic = make([]string, len(log.Topics()))
-		l.Address = common.ToHex(log.Address())
-		l.Data = common.ToHex(log.Data())
-		l.Number = log.Number()
-		for j, topic := range log.Topics() {
-			l.Topic[j] = common.ToHex(topic)
-		}
-		ls[i] = l
-	}
-
-	return
-}
-
-type whisperFilter struct {
-	messages []xeth.WhisperMessage
-	timeout  time.Time
-	id       int
-}
-
-func (w *whisperFilter) add(msgs ...xeth.WhisperMessage) {
-	w.messages = append(w.messages, msgs...)
-}
-func (w *whisperFilter) get() []xeth.WhisperMessage {
-	w.timeout = time.Now()
-	tmp := w.messages
-	w.messages = nil
-	return tmp
-}
-
-type logFilter struct {
-	logs    state.Logs
-	timeout time.Time
-	id      int
-}
-
-func (l *logFilter) add(logs ...state.Log) {
-	l.logs = append(l.logs, logs...)
-}
-
-func (l *logFilter) get() state.Logs {
-	l.timeout = time.Now()
-	tmp := l.logs
-	l.logs = nil
-	return tmp
-}
diff --git a/xeth/xeth.go b/xeth/xeth.go
index 115bd787a..142ae7218 100644
--- a/xeth/xeth.go
+++ b/xeth/xeth.go
@@ -6,6 +6,8 @@ import (
 	"encoding/json"
 	"fmt"
 	"math/big"
+	"sync"
+	"time"
 
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/common"
@@ -13,13 +15,19 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/event"
+	"github.com/ethereum/go-ethereum/event/filter"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/state"
 	"github.com/ethereum/go-ethereum/whisper"
 )
 
-var pipelogger = logger.NewLogger("XETH")
+var (
+	pipelogger       = logger.NewLogger("XETH")
+	filterTickerTime = 5 * time.Minute
+	defaultGasPrice  = big.NewInt(10000000000000) //150000000000
+	defaultGas       = big.NewInt(90000)          //500000
+)
 
 // to resolve the import cycle
 type Backend interface {
@@ -62,6 +70,13 @@ type Frontend interface {
 	ConfirmTransaction(tx *types.Transaction) bool
 }
 
+// dummyFrontend is a non-interactive frontend that allows all
+// transactions but cannot not unlock any keys.
+type dummyFrontend struct{}
+
+func (dummyFrontend) UnlockAccount([]byte) bool                  { return false }
+func (dummyFrontend) ConfirmTransaction(*types.Transaction) bool { return true }
+
 type XEth struct {
 	eth            Backend
 	blockProcessor *core.BlockProcessor
@@ -71,15 +86,20 @@ type XEth struct {
 	whisper        *Whisper
 
 	frontend Frontend
+
+	quit          chan struct{}
+	filterManager *filter.FilterManager
+
+	logMut sync.RWMutex
+	logs   map[int]*logFilter
+
+	messagesMut sync.RWMutex
+	messages    map[int]*whisperFilter
+
+	// regmut   sync.Mutex
+	// register map[string][]*interface{} // TODO improve return type
 }
 
-// dummyFrontend is a non-interactive frontend that allows all
-// transactions but cannot not unlock any keys.
-type dummyFrontend struct{}
-
-func (dummyFrontend) UnlockAccount([]byte) bool                  { return false }
-func (dummyFrontend) ConfirmTransaction(*types.Transaction) bool { return true }
-
 // New creates an XEth that uses the given frontend.
 // If a nil Frontend is provided, a default frontend which
 // confirms all transactions will be used.
@@ -90,15 +110,76 @@ func New(eth Backend, frontend Frontend) *XEth {
 		chainManager:   eth.ChainManager(),
 		accountManager: eth.AccountManager(),
 		whisper:        NewWhisper(eth.Whisper()),
+		quit:           make(chan struct{}),
+		filterManager:  filter.NewFilterManager(eth.EventMux()),
 		frontend:       frontend,
+		logs:           make(map[int]*logFilter),
+		messages:       make(map[int]*whisperFilter),
 	}
 	if frontend == nil {
 		xeth.frontend = dummyFrontend{}
 	}
 	xeth.state = NewState(xeth, xeth.chainManager.TransState())
+	go xeth.start()
+	go xeth.filterManager.Start()
+
 	return xeth
 }
 
+func (self *XEth) start() {
+	timer := time.NewTicker(2 * time.Second)
+done:
+	for {
+		select {
+		case <-timer.C:
+			self.logMut.Lock()
+			self.messagesMut.Lock()
+			for id, filter := range self.logs {
+				if time.Since(filter.timeout) > filterTickerTime {
+					self.filterManager.UninstallFilter(id)
+					delete(self.logs, id)
+				}
+			}
+
+			for id, filter := range self.messages {
+				if time.Since(filter.timeout) > filterTickerTime {
+					self.Whisper().Unwatch(id)
+					delete(self.messages, id)
+				}
+			}
+			self.messagesMut.Unlock()
+			self.logMut.Unlock()
+		case <-self.quit:
+			break done
+		}
+	}
+}
+
+func (self *XEth) stop() {
+	close(self.quit)
+}
+
+func (self *XEth) DefaultGas() *big.Int      { return defaultGas }
+func (self *XEth) DefaultGasPrice() *big.Int { return defaultGasPrice }
+
+func (self *XEth) AtStateNum(num int64) *XEth {
+	chain := self.Backend().ChainManager()
+	var block *types.Block
+
+	if num < 0 {
+		num = chain.CurrentBlock().Number().Int64() + num + 1
+	}
+	block = chain.GetBlockByNumber(uint64(num))
+
+	var st *state.StateDB
+	if block != nil {
+		st = state.New(block.Root(), self.Backend().StateDb())
+	} else {
+		st = chain.State()
+	}
+	return self.WithState(st)
+}
+
 func (self *XEth) Backend() Backend { return self.eth }
 func (self *XEth) WithState(statedb *state.StateDB) *XEth {
 	xeth := &XEth{
@@ -241,6 +322,157 @@ func (self *XEth) SecretToAddress(key string) string {
 	return common.ToHex(pair.Address())
 }
 
+func (self *XEth) RegisterFilter(args *core.FilterOptions) int {
+	var id int
+	filter := core.NewFilter(self.Backend())
+	filter.SetOptions(args)
+	filter.LogsCallback = func(logs state.Logs) {
+		self.logMut.Lock()
+		defer self.logMut.Unlock()
+
+		self.logs[id].add(logs...)
+	}
+	id = self.filterManager.InstallFilter(filter)
+	self.logs[id] = &logFilter{timeout: time.Now()}
+
+	return id
+}
+
+func (self *XEth) UninstallFilter(id int) bool {
+	if _, ok := self.logs[id]; ok {
+		delete(self.logs, id)
+		self.filterManager.UninstallFilter(id)
+		return true
+	}
+
+	return false
+}
+
+func (self *XEth) NewFilterString(word string) int {
+	var id int
+	filter := core.NewFilter(self.Backend())
+
+	switch word {
+	case "pending":
+		filter.PendingCallback = func(tx *types.Transaction) {
+			self.logMut.Lock()
+			defer self.logMut.Unlock()
+
+			self.logs[id].add(&state.StateLog{})
+		}
+	case "latest":
+		filter.BlockCallback = func(block *types.Block, logs state.Logs) {
+			self.logMut.Lock()
+			defer self.logMut.Unlock()
+
+			for _, log := range logs {
+				self.logs[id].add(log)
+			}
+			self.logs[id].add(&state.StateLog{})
+		}
+	}
+
+	id = self.filterManager.InstallFilter(filter)
+	self.logs[id] = &logFilter{timeout: time.Now()}
+
+	return id
+}
+
+func (self *XEth) FilterChanged(id int) state.Logs {
+	self.logMut.Lock()
+	defer self.logMut.Unlock()
+
+	if self.logs[id] != nil {
+		return self.logs[id].get()
+	}
+
+	return nil
+}
+
+func (self *XEth) Logs(id int) state.Logs {
+	self.logMut.Lock()
+	defer self.logMut.Unlock()
+
+	filter := self.filterManager.GetFilter(id)
+	if filter != nil {
+		return filter.Find()
+	}
+
+	return nil
+}
+
+func (self *XEth) AllLogs(args *core.FilterOptions) state.Logs {
+	filter := core.NewFilter(self.Backend())
+	filter.SetOptions(args)
+
+	return filter.Find()
+}
+
+func (p *XEth) NewWhisperFilter(opts *Options) int {
+	var id int
+	opts.Fn = func(msg WhisperMessage) {
+		p.messagesMut.Lock()
+		defer p.messagesMut.Unlock()
+		p.messages[id].add(msg) // = append(p.messages[id], msg)
+	}
+	id = p.Whisper().Watch(opts)
+	p.messages[id] = &whisperFilter{timeout: time.Now()}
+	return id
+}
+
+func (p *XEth) UninstallWhisperFilter(id int) bool {
+	if _, ok := p.messages[id]; ok {
+		delete(p.messages, id)
+		return true
+	}
+
+	return false
+}
+
+func (self *XEth) MessagesChanged(id int) []WhisperMessage {
+	self.messagesMut.Lock()
+	defer self.messagesMut.Unlock()
+
+	if self.messages[id] != nil {
+		return self.messages[id].get()
+	}
+
+	return nil
+}
+
+// func (self *XEth) Register(args string) bool {
+// 	self.regmut.Lock()
+// 	defer self.regmut.Unlock()
+
+// 	if _, ok := self.register[args]; ok {
+// 		self.register[args] = nil // register with empty
+// 	}
+// 	return true
+// }
+
+// func (self *XEth) Unregister(args string) bool {
+// 	self.regmut.Lock()
+// 	defer self.regmut.Unlock()
+
+// 	if _, ok := self.register[args]; ok {
+// 		delete(self.register, args)
+// 		return true
+// 	}
+
+// 	return false
+// }
+
+// // TODO improve return type
+// func (self *XEth) PullWatchTx(args string) []*interface{} {
+// 	self.regmut.Lock()
+// 	defer self.regmut.Unlock()
+
+// 	txs := self.register[args]
+// 	self.register[args] = nil
+
+// 	return txs
+// }
+
 type KeyVal struct {
 	Key   string `json:"key"`
 	Value string `json:"value"`
@@ -298,11 +530,6 @@ func (self *XEth) PushTx(encodedTx string) (string, error) {
 	return common.ToHex(tx.Hash()), nil
 }
 
-var (
-	defaultGasPrice = big.NewInt(10000000000000)
-	defaultGas      = big.NewInt(90000)
-)
-
 func (self *XEth) Call(fromStr, toStr, valueStr, gasStr, gasPriceStr, dataStr string) (string, error) {
 	statedb := self.State().State() //self.chainManager.TransState()
 	msg := callmsg{
@@ -333,12 +560,44 @@ func (self *XEth) Transact(fromStr, toStr, valueStr, gasStr, gasPriceStr, codeSt
 		from             []byte
 		to               []byte
 		value            = common.NewValue(valueStr)
-		gas              = common.NewValue(gasStr)
-		price            = common.NewValue(gasPriceStr)
+		gas              = common.Big(gasStr)
+		price            = common.Big(gasPriceStr)
 		data             []byte
 		contractCreation bool
 	)
 
+	// TODO if no_private_key then
+	//if _, exists := p.register[args.From]; exists {
+	//	p.register[args.From] = append(p.register[args.From], args)
+	//} else {
+	/*
+		account := accounts.Get(common.FromHex(args.From))
+		if account != nil {
+			if account.Unlocked() {
+				if !unlockAccount(account) {
+					return
+				}
+			}
+
+			result, _ := account.Transact(common.FromHex(args.To), common.FromHex(args.Value), common.FromHex(args.Gas), common.FromHex(args.GasPrice), common.FromHex(args.Data))
+			if len(result) > 0 {
+				*reply = common.ToHex(result)
+			}
+		} else if _, exists := p.register[args.From]; exists {
+			p.register[ags.From] = append(p.register[args.From], args)
+		}
+	*/
+
+	// TODO: align default values to have the same type, e.g. not depend on
+	// common.Value conversions later on
+	if gas.Cmp(big.NewInt(0)) == 0 {
+		gas = defaultGas
+	}
+
+	if price.Cmp(big.NewInt(0)) == 0 {
+		price = defaultGasPrice
+	}
+
 	from = common.FromHex(fromStr)
 	data = common.FromHex(codeStr)
 	to = common.FromHex(toStr)
@@ -348,9 +607,9 @@ func (self *XEth) Transact(fromStr, toStr, valueStr, gasStr, gasPriceStr, codeSt
 
 	var tx *types.Transaction
 	if contractCreation {
-		tx = types.NewContractCreationTx(value.BigInt(), gas.BigInt(), price.BigInt(), data)
+		tx = types.NewContractCreationTx(value.BigInt(), gas, price, data)
 	} else {
-		tx = types.NewTransactionMessage(to, value.BigInt(), gas.BigInt(), price.BigInt(), data)
+		tx = types.NewTransactionMessage(to, value.BigInt(), gas, price, data)
 	}
 
 	state := self.chainManager.TxState()
@@ -411,3 +670,36 @@ func (m callmsg) GasPrice() *big.Int { return m.gasPrice }
 func (m callmsg) Gas() *big.Int      { return m.gas }
 func (m callmsg) Value() *big.Int    { return m.value }
 func (m callmsg) Data() []byte       { return m.data }
+
+type whisperFilter struct {
+	messages []WhisperMessage
+	timeout  time.Time
+	id       int
+}
+
+func (w *whisperFilter) add(msgs ...WhisperMessage) {
+	w.messages = append(w.messages, msgs...)
+}
+func (w *whisperFilter) get() []WhisperMessage {
+	w.timeout = time.Now()
+	tmp := w.messages
+	w.messages = nil
+	return tmp
+}
+
+type logFilter struct {
+	logs    state.Logs
+	timeout time.Time
+	id      int
+}
+
+func (l *logFilter) add(logs ...state.Log) {
+	l.logs = append(l.logs, logs...)
+}
+
+func (l *logFilter) get() state.Logs {
+	l.timeout = time.Now()
+	tmp := l.logs
+	l.logs = nil
+	return tmp
+}