cmd/geth, jsre, rpc: run all JS code on the event loop

Some JSRE methods (PrettyPrint, ToVal) bypassed the event loop. All
calls to the JS VM are now wrapped. In order to make this somewhat more
foolproof, the otto VM is now a local variable inside the event loop.

cmd/geth/admin.go

@@ -144,7 +144,8 @@ func (js *jsre) pendingTransactions(call otto.FunctionCall) otto.Value {
 		}
 	}
 
-	return js.re.ToVal(ltxs)
+	v, _ := call.Otto.ToValue(ltxs)
+	return v
 }
 
 func (js *jsre) resend(call otto.FunctionCall) otto.Value {
@@ -175,7 +176,8 @@ func (js *jsre) resend(call otto.FunctionCall) otto.Value {
 		}
 		js.ethereum.TxPool().RemoveTransactions(types.Transactions{tx.tx})
 
-		return js.re.ToVal(ret)
+		v, _ := call.Otto.ToValue(ret)
+		return v
 	}
 
 	fmt.Println("first argument must be a transaction")
@@ -198,12 +200,13 @@ func (js *jsre) sign(call otto.FunctionCall) otto.Value {
 		fmt.Println(err)
 		return otto.UndefinedValue()
 	}
-	v, err := js.xeth.Sign(signer, data, false)
+	signed, err := js.xeth.Sign(signer, data, false)
 	if err != nil {
 		fmt.Println(err)
 		return otto.UndefinedValue()
 	}
-	return js.re.ToVal(v)
+	v, _ := call.Otto.ToValue(signed)
+	return v
 }
 
 func (js *jsre) debugBlock(call otto.FunctionCall) otto.Value {
@@ -237,8 +240,8 @@ func (js *jsre) setHead(call otto.FunctionCall) otto.Value {
 
 func (js *jsre) downloadProgress(call otto.FunctionCall) otto.Value {
 	current, max := js.ethereum.Downloader().Stats()
-
-	return js.re.ToVal(fmt.Sprintf("%d/%d", current, max))
+	v, _ := call.Otto.ToValue(fmt.Sprintf("%d/%d", current, max))
+	return v
 }
 
 func (js *jsre) getBlockRlp(call otto.FunctionCall) otto.Value {
@@ -248,7 +251,8 @@ func (js *jsre) getBlockRlp(call otto.FunctionCall) otto.Value {
 		return otto.UndefinedValue()
 	}
 	encoded, _ := rlp.EncodeToBytes(block)
-	return js.re.ToVal(fmt.Sprintf("%x", encoded))
+	v, _ := call.Otto.ToValue(fmt.Sprintf("%x", encoded))
+	return v
 }
 
 func (js *jsre) setExtra(call otto.FunctionCall) otto.Value {
@@ -278,8 +282,9 @@ func (js *jsre) setGasPrice(call otto.FunctionCall) otto.Value {
 	return otto.UndefinedValue()
 }
 
-func (js *jsre) hashrate(otto.FunctionCall) otto.Value {
-	return js.re.ToVal(js.ethereum.Miner().HashRate())
+func (js *jsre) hashrate(call otto.FunctionCall) otto.Value {
+	v, _ := call.Otto.ToValue(js.ethereum.Miner().HashRate())
+	return v
 }
 
 func (js *jsre) makeDAG(call otto.FunctionCall) otto.Value {
@@ -495,15 +500,18 @@ func (js *jsre) newAccount(call otto.FunctionCall) otto.Value {
 		fmt.Printf("Could not create the account: %v", err)
 		return otto.UndefinedValue()
 	}
-	return js.re.ToVal(acct.Address.Hex())
+	v, _ := call.Otto.ToValue(acct.Address.Hex())
+	return v
 }
 
 func (js *jsre) nodeInfo(call otto.FunctionCall) otto.Value {
-	return js.re.ToVal(js.ethereum.NodeInfo())
+	v, _ := call.Otto.ToValue(js.ethereum.NodeInfo())
+	return v
 }
 
 func (js *jsre) peers(call otto.FunctionCall) otto.Value {
-	return js.re.ToVal(js.ethereum.PeersInfo())
+	v, _ := call.Otto.ToValue(js.ethereum.PeersInfo())
+	return v
 }
 
 func (js *jsre) importChain(call otto.FunctionCall) otto.Value {
@@ -562,7 +570,8 @@ func (js *jsre) dumpBlock(call otto.FunctionCall) otto.Value {
 
 	statedb := state.New(block.Root(), js.ethereum.StateDb())
 	dump := statedb.RawDump()
-	return js.re.ToVal(dump)
+	v, _ := call.Otto.ToValue(dump)
+	return v
 }
 
 func (js *jsre) waitForBlocks(call otto.FunctionCall) otto.Value {
@@ -611,7 +620,8 @@ func (js *jsre) waitForBlocks(call otto.FunctionCall) otto.Value {
 		return otto.UndefinedValue()
 	case height = <-wait:
 	}
-	return js.re.ToVal(height.Uint64())
+	v, _ := call.Otto.ToValue(height.Uint64())
+	return v
 }
 
 func (js *jsre) sleep(call otto.FunctionCall) otto.Value {
@@ -704,8 +714,8 @@ func (js *jsre) register(call otto.FunctionCall) otto.Value {
 		return otto.UndefinedValue()
 	}
 
-	return js.re.ToVal(contenthash.Hex())
-
+	v, _ := call.Otto.ToValue(contenthash.Hex())
+	return v
 }
 
 func (js *jsre) registerUrl(call otto.FunctionCall) otto.Value {
@@ -764,7 +774,8 @@ func (js *jsre) getContractInfo(call otto.FunctionCall) otto.Value {
 		fmt.Println(err)
 		return otto.UndefinedValue()
 	}
-	return js.re.ToVal(info)
+	v, _ := call.Otto.ToValue(info)
+	return v
 }
 
 func (js *jsre) startNatSpec(call otto.FunctionCall) otto.Value {

cmd/geth/js.go

@@ -104,7 +104,7 @@ func newJSRE(ethereum *eth.Ethereum, libPath, corsDomain string, interactive boo
 func (js *jsre) apiBindings(f xeth.Frontend) {
 	xe := xeth.New(js.ethereum, f)
 	ethApi := rpc.NewEthereumApi(xe)
-	jeth := rpc.NewJeth(ethApi, js.re.ToVal, js.re)
+	jeth := rpc.NewJeth(ethApi, js.re)
 
 	js.re.Set("jeth", struct{}{})
 	t, _ := js.re.Get("jeth")

jsre/jsre_test.go

 package jsre
 
 import (
-	"github.com/robertkrimen/otto"
 	"io/ioutil"
 	"os"
 	"testing"
 	"time"
+
+	"github.com/robertkrimen/otto"
 )
 
-type testNativeObjectBinding struct {
-	toVal func(interface{}) otto.Value
-}
+type testNativeObjectBinding struct{}
 
 type msg struct {
 	Msg string
@@ -21,7 +20,8 @@ func (no *testNativeObjectBinding) TestMethod(call otto.FunctionCall) otto.Value
 	if err != nil {
 		return otto.UndefinedValue()
 	}
-	return no.toVal(&msg{m})
+	v, _ := call.Otto.ToValue(&msg{m})
+	return v
 }
 
 func TestExec(t *testing.T) {
@@ -74,7 +74,7 @@ func TestNatto(t *testing.T) {
 func TestBind(t *testing.T) {
 	jsre := New("/tmp")
 
-	jsre.Bind("no", &testNativeObjectBinding{jsre.ToVal})
+	jsre.Bind("no", &testNativeObjectBinding{})
 
 	val, err := jsre.Run(`no.TestMethod("testMsg")`)
 	if err != nil {

rpc/jeth.go

@@ -3,18 +3,18 @@ package rpc
 import (
 	"encoding/json"
 	"fmt"
+
 	"github.com/ethereum/go-ethereum/jsre"
 	"github.com/robertkrimen/otto"
 )
 
 type Jeth struct {
 	ethApi *EthereumApi
-	toVal  func(interface{}) otto.Value
 	re     *jsre.JSRE
 }
 
-func NewJeth(ethApi *EthereumApi, toVal func(interface{}) otto.Value, re *jsre.JSRE) *Jeth {
-	return &Jeth{ethApi, toVal, re}
+func NewJeth(ethApi *EthereumApi, re *jsre.JSRE) *Jeth {
+	return &Jeth{ethApi, re}
 }
 
 func (self *Jeth) err(call otto.FunctionCall, code int, msg string, id interface{}) (response otto.Value) {