cmd, eth, node, rpc, xeth: use single-instance services

xeth/state.go

@@ -19,7 +19,6 @@ package xeth
 import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/state"
-	"github.com/ethereum/go-ethereum/eth"
 )
 
 type State struct {
@@ -46,7 +45,7 @@ func (self *State) SafeGet(addr string) *Object {
 func (self *State) safeGet(addr string) *state.StateObject {
 	object := self.state.GetStateObject(common.HexToAddress(addr))
 	if object == nil {
-		object = state.NewStateObject(common.HexToAddress(addr), self.xeth.backend.Service("eth").(*eth.Ethereum).ChainDb())
+		object = state.NewStateObject(common.HexToAddress(addr), self.xeth.EthereumService().ChainDb())
 	}
 	return object
 }

xeth/xeth.go

@@ -100,8 +100,8 @@ func New(stack *node.Node, frontend Frontend) *XEth {
 		ethereum *eth.Ethereum
 		whisper  *whisper.Whisper
 	)
-	stack.SingletonService(&ethereum)
-	stack.SingletonService(&whisper)
+	stack.Service(&ethereum)
+	stack.Service(&whisper)
 
 	xeth := &XEth{
 		backend:          stack,
@@ -130,7 +130,7 @@ func New(stack *node.Node, frontend Frontend) *XEth {
 
 func (self *XEth) EthereumService() *eth.Ethereum {
 	var ethereum *eth.Ethereum
-	if _, err := self.backend.SingletonService(&ethereum); err != nil {
+	if err := self.backend.Service(&ethereum); err != nil {
 		return nil
 	}
 	return ethereum
@@ -138,7 +138,7 @@ func (self *XEth) EthereumService() *eth.Ethereum {
 
 func (self *XEth) WhisperService() *whisper.Whisper {
 	var whisper *whisper.Whisper
-	if _, err := self.backend.SingletonService(&whisper); err != nil {
+	if err := self.backend.Service(&whisper); err != nil {
 		return nil
 	}
 	return whisper