From 19360c00795d356d052a379663c3f36aedba3f9e Mon Sep 17 00:00:00 2001
From: Taylor Gerring <taylor.gerring@gmail.com>
Date: Thu, 19 Mar 2015 23:28:45 -0400
Subject: [PATCH] Move stateAt func to XEth

---
 rpc/api.go   | 36 ++++++------------------------------
 xeth/xeth.go | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+), 30 deletions(-)

diff --git a/rpc/api.go b/rpc/api.go
index 06014c74f..f31b9a344 100644
--- a/rpc/api.go
+++ b/rpc/api.go
@@ -10,11 +10,9 @@ import (
 
 	"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/state"
 	"github.com/ethereum/go-ethereum/xeth"
 )
 
@@ -53,28 +51,6 @@ func (self *EthereumApi) xeth() *xeth.XEth {
 	return self.eth
 }
 
-func (self *EthereumApi) xethWithStateNum(num int64) *xeth.XEth {
-	chain := self.xeth().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.xeth().Backend().StateDb())
-	} else {
-		st = chain.State()
-	}
-	return self.xeth().WithState(st)
-}
-
-func (self *EthereumApi) getStateWithNum(num int64) *xeth.State {
-	return self.xethWithStateNum(num).State()
-}
-
 // func (self *EthereumApi) Register(args string, reply *interface{}) error {
 // 	self.regmut.Lock()
 // 	defer self.regmut.Unlock()
@@ -152,7 +128,7 @@ func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) (err error)
 }
 
 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)
+	result, err := p.xeth().AtStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
 	if err != nil {
 		return err
 	}
@@ -166,7 +142,7 @@ func (p *EthereumApi) GetStorageAt(args *GetStorageAtArgs, reply *interface{}) e
 		return err
 	}
 
-	state := p.xethWithStateNum(args.BlockNumber).State().SafeGet(args.Address)
+	state := p.xeth().AtStateNum(args.BlockNumber).State().SafeGet(args.Address)
 	value := state.StorageString(args.Key)
 
 	var hx string
@@ -240,7 +216,7 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 			return err
 		}
 
-		*reply = common.ToHex(p.xethWithStateNum(args.BlockNumber).State().SafeGet(args.Address).Balance().Bytes())
+		*reply = common.ToHex(p.xeth().AtStateNum(args.BlockNumber).State().SafeGet(args.Address).Balance().Bytes())
 	case "eth_getStorage", "eth_storageAt":
 		args := new(GetStorageArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
@@ -251,7 +227,7 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 			return err
 		}
 
-		*reply = p.xethWithStateNum(args.BlockNumber).State().SafeGet(args.Address).Storage()
+		*reply = p.xeth().AtStateNum(args.BlockNumber).State().SafeGet(args.Address).Storage()
 	case "eth_getStorageAt":
 		args := new(GetStorageAtArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
@@ -269,7 +245,7 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 			return err
 		}
 
-		*reply = p.xethWithStateNum(args.BlockNumber).TxCountAt(args.Address)
+		*reply = p.xeth().AtStateNum(args.BlockNumber).TxCountAt(args.Address)
 	case "eth_getBlockTransactionCountByHash":
 		args := new(GetBlockByHashArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
@@ -314,7 +290,7 @@ func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error
 		if err := args.requirements(); err != nil {
 			return err
 		}
-		*reply = p.xethWithStateNum(args.BlockNumber).CodeAt(args.Address)
+		*reply = p.xeth().AtStateNum(args.BlockNumber).CodeAt(args.Address)
 	case "eth_sendTransaction", "eth_transact":
 		args := new(NewTxArgs)
 		if err := json.Unmarshal(req.Params, &args); err != nil {
diff --git a/xeth/xeth.go b/xeth/xeth.go
index 922fce8f1..504a93f58 100644
--- a/xeth/xeth.go
+++ b/xeth/xeth.go
@@ -154,6 +154,24 @@ func (self *XEth) stop() {
 	close(self.quit)
 }
 
+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{