Moved JSRE to it's own package for sharing between ethere(um/al)

3 files changed, 489 insertions, 0 deletions

diff --git a/javascript/javascript_runtime.go b/javascript/javascript_runtime.go
new file mode 100644
index 000000000..158fc93cf
--- /dev/null
+++ b/javascript/javascript_runtime.go
@@ -0,0 +1,266 @@
+package javascript
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path"
+	"path/filepath"
+
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethlog"
+	"github.com/ethereum/eth-go/ethpub"
+	"github.com/ethereum/eth-go/ethreact"
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/ethereum/go-ethereum/utils"
+	"github.com/obscuren/otto"
+)
+
+var jsrelogger = ethlog.NewLogger("JSRE")
+
+type JSRE struct {
+	ethereum *eth.Ethereum
+	Vm       *otto.Otto
+	lib      *ethpub.PEthereum
+
+	blockChan  chan ethreact.Event
+	changeChan chan ethreact.Event
+	quitChan   chan bool
+
+	objectCb map[string][]otto.Value
+}
+
+func (jsre *JSRE) LoadExtFile(path string) {
+	result, err := ioutil.ReadFile(path)
+	if err == nil {
+		jsre.Vm.Run(result)
+	} else {
+		jsrelogger.Infoln("Could not load file:", path)
+	}
+}
+
+func (jsre *JSRE) LoadIntFile(file string) {
+	assetPath := path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "ethereal", "assets", "ext")
+	jsre.LoadExtFile(path.Join(assetPath, file))
+}
+
+func NewJSRE(ethereum *eth.Ethereum) *JSRE {
+	re := &JSRE{
+		ethereum,
+		otto.New(),
+		ethpub.NewPEthereum(ethereum),
+		make(chan ethreact.Event, 10),
+		make(chan ethreact.Event, 10),
+		make(chan bool),
+		make(map[string][]otto.Value),
+	}
+
+	// Init the JS lib
+	re.Vm.Run(jsLib)
+
+	// Load extra javascript files
+	re.LoadIntFile("string.js")
+	re.LoadIntFile("big.js")
+
+	// We have to make sure that, whoever calls this, calls "Stop"
+	go re.mainLoop()
+
+	// Subscribe to events
+	reactor := ethereum.Reactor()
+	reactor.Subscribe("newBlock", re.blockChan)
+
+	re.Bind("eth", &JSEthereum{re.lib, re.Vm, ethereum})
+
+	re.initStdFuncs()
+
+	jsrelogger.Infoln("started")
+
+	return re
+}
+
+func (self *JSRE) Bind(name string, v interface{}) {
+	self.Vm.Set(name, v)
+}
+
+func (self *JSRE) Run(code string) (otto.Value, error) {
+	return self.Vm.Run(code)
+}
+
+func (self *JSRE) Require(file string) error {
+	if len(filepath.Ext(file)) == 0 {
+		file += ".js"
+	}
+
+	fh, err := os.Open(file)
+	if err != nil {
+		return err
+	}
+
+	content, _ := ioutil.ReadAll(fh)
+	self.Run("exports = {};(function() {" + string(content) + "})();")
+
+	return nil
+}
+
+func (self *JSRE) Stop() {
+	// Kill the main loop
+	self.quitChan <- true
+
+	close(self.blockChan)
+	close(self.quitChan)
+	close(self.changeChan)
+	jsrelogger.Infoln("stopped")
+}
+
+func (self *JSRE) mainLoop() {
+out:
+	for {
+		select {
+		case <-self.quitChan:
+			break out
+		case block := <-self.blockChan:
+			if _, ok := block.Resource.(*ethchain.Block); ok {
+			}
+		case object := <-self.changeChan:
+			if stateObject, ok := object.Resource.(*ethstate.StateObject); ok {
+				for _, cb := range self.objectCb[ethutil.Bytes2Hex(stateObject.Address())] {
+					val, _ := self.Vm.ToValue(ethpub.NewPStateObject(stateObject))
+					cb.Call(cb, val)
+				}
+			} else if storageObject, ok := object.Resource.(*ethstate.StorageState); ok {
+				for _, cb := range self.objectCb[ethutil.Bytes2Hex(storageObject.StateAddress)+ethutil.Bytes2Hex(storageObject.Address)] {
+					val, _ := self.Vm.ToValue(ethpub.NewPStorageState(storageObject))
+					cb.Call(cb, val)
+				}
+			}
+		}
+	}
+}
+
+func (self *JSRE) initStdFuncs() {
+	t, _ := self.Vm.Get("eth")
+	eth := t.Object()
+	eth.Set("watch", self.watch)
+	eth.Set("addPeer", self.addPeer)
+	eth.Set("require", self.require)
+	eth.Set("stopMining", self.stopMining)
+	eth.Set("startMining", self.startMining)
+	eth.Set("execBlock", self.execBlock)
+	eth.Set("dump", self.dump)
+}
+
+/*
+ * The following methods are natively implemented javascript functions
+ */
+
+func (self *JSRE) dump(call otto.FunctionCall) otto.Value {
+	var state *ethstate.State
+
+	if len(call.ArgumentList) > 0 {
+		var block *ethchain.Block
+		if call.Argument(0).IsNumber() {
+			num, _ := call.Argument(0).ToInteger()
+			block = self.ethereum.BlockChain().GetBlockByNumber(uint64(num))
+		} else if call.Argument(0).IsString() {
+			hash, _ := call.Argument(0).ToString()
+			block = self.ethereum.BlockChain().GetBlock(ethutil.Hex2Bytes(hash))
+		} else {
+			fmt.Println("invalid argument for dump. Either hex string or number")
+		}
+
+		if block == nil {
+			fmt.Println("block not found")
+
+			return otto.UndefinedValue()
+		}
+
+		state = block.State()
+	} else {
+		state = self.ethereum.StateManager().CurrentState()
+	}
+
+	v, _ := self.Vm.ToValue(state.Dump())
+
+	return v
+}
+
+func (self *JSRE) stopMining(call otto.FunctionCall) otto.Value {
+	v, _ := self.Vm.ToValue(utils.StopMining(self.ethereum))
+	return v
+}
+
+func (self *JSRE) startMining(call otto.FunctionCall) otto.Value {
+	v, _ := self.Vm.ToValue(utils.StartMining(self.ethereum))
+	return v
+}
+
+// eth.watch
+func (self *JSRE) watch(call otto.FunctionCall) otto.Value {
+	addr, _ := call.Argument(0).ToString()
+	var storageAddr string
+	var cb otto.Value
+	var storageCallback bool
+	if len(call.ArgumentList) > 2 {
+		storageCallback = true
+		storageAddr, _ = call.Argument(1).ToString()
+		cb = call.Argument(2)
+	} else {
+		cb = call.Argument(1)
+	}
+
+	if storageCallback {
+		self.objectCb[addr+storageAddr] = append(self.objectCb[addr+storageAddr], cb)
+
+		event := "storage:" + string(ethutil.Hex2Bytes(addr)) + ":" + string(ethutil.Hex2Bytes(storageAddr))
+		self.ethereum.Reactor().Subscribe(event, self.changeChan)
+	} else {
+		self.objectCb[addr] = append(self.objectCb[addr], cb)
+
+		event := "object:" + string(ethutil.Hex2Bytes(addr))
+		self.ethereum.Reactor().Subscribe(event, self.changeChan)
+	}
+
+	return otto.UndefinedValue()
+}
+
+func (self *JSRE) addPeer(call otto.FunctionCall) otto.Value {
+	host, err := call.Argument(0).ToString()
+	if err != nil {
+		return otto.FalseValue()
+	}
+	self.ethereum.ConnectToPeer(host)
+
+	return otto.TrueValue()
+}
+
+func (self *JSRE) require(call otto.FunctionCall) otto.Value {
+	file, err := call.Argument(0).ToString()
+	if err != nil {
+		return otto.UndefinedValue()
+	}
+	if err := self.Require(file); err != nil {
+		fmt.Println("err:", err)
+		return otto.UndefinedValue()
+	}
+
+	t, _ := self.Vm.Get("exports")
+
+	return t
+}
+
+func (self *JSRE) execBlock(call otto.FunctionCall) otto.Value {
+	hash, err := call.Argument(0).ToString()
+	if err != nil {
+		return otto.UndefinedValue()
+	}
+
+	err = utils.BlockDo(self.ethereum, ethutil.Hex2Bytes(hash))
+	if err != nil {
+		fmt.Println(err)
+		return otto.FalseValue()
+	}
+
+	return otto.TrueValue()
+}
diff --git a/javascript/js_lib.go b/javascript/js_lib.go
new file mode 100644
index 000000000..a3e9b8a5b
--- /dev/null
+++ b/javascript/js_lib.go
@@ -0,0 +1,53 @@
+package javascript
+
+const jsLib = `
+function pp(object) {
+    var str = "";
+
+    if(object instanceof Array) {
+        str += "[ ";
+        for(var i = 0, l = object.length; i < l; i++) {
+            str += pp(object[i]);
+
+            if(i < l-1) {
+                str += ", ";
+            }
+        }
+        str += " ]";
+    } else if(typeof(object) === "object") {
+        str += "{ ";
+        var last = Object.keys(object).sort().pop()
+        for(var k in object) {
+            str += k + ": " + pp(object[k]);
+
+            if(k !== last) {
+                str += ", ";
+            }
+        }
+        str += " }";
+    } else if(typeof(object) === "string") {
+        str += "\033[32m'" + object + "'";
+    } else if(typeof(object) === "undefined") {
+        str += "\033[1m\033[30m" + object;
+    } else if(typeof(object) === "number") {
+        str += "\033[31m" + object;
+    } else if(typeof(object) === "function") {
+	str += "\033[35m[Function]";
+    } else {
+        str += object;                    
+    }
+
+    str += "\033[0m";
+
+    return str;
+}
+
+function prettyPrint(/* */) {
+    var args = arguments;
+    for(var i = 0, l = args.length; i < l; i++) {
+	    console.log(pp(args[i]))
+    }
+}
+
+var print = prettyPrint;
+`
diff --git a/javascript/types.go b/javascript/types.go
new file mode 100644
index 000000000..f9d18b26a
--- /dev/null
+++ b/javascript/types.go
@@ -0,0 +1,170 @@
+package javascript
+
+import (
+	"fmt"
+
+	"github.com/ethereum/eth-go"
+	"github.com/ethereum/eth-go/ethchain"
+	"github.com/ethereum/eth-go/ethpub"
+	"github.com/ethereum/eth-go/ethstate"
+	"github.com/ethereum/eth-go/ethutil"
+	"github.com/obscuren/otto"
+)
+
+type JSStateObject struct {
+	*ethpub.PStateObject
+	eth *JSEthereum
+}
+
+func (self *JSStateObject) EachStorage(call otto.FunctionCall) otto.Value {
+	cb := call.Argument(0)
+	self.PStateObject.EachStorage(func(key string, value *ethutil.Value) {
+		value.Decode()
+
+		cb.Call(self.eth.toVal(self), self.eth.toVal(key), self.eth.toVal(ethutil.Bytes2Hex(value.Bytes())))
+	})
+
+	return otto.UndefinedValue()
+}
+
+// The JSEthereum object attempts to wrap the PEthereum object and returns
+// meaningful javascript objects
+type JSBlock struct {
+	*ethpub.PBlock
+	eth *JSEthereum
+}
+
+func (self *JSBlock) GetTransaction(hash string) otto.Value {
+	return self.eth.toVal(self.PBlock.GetTransaction(hash))
+}
+
+type JSMessage struct {
+	To, From  string
+	Input     string
+	Output    string
+	Path      int
+	Origin    string
+	Timestamp int32
+	Coinbase  string
+	Block     string
+	Number    int32
+}
+
+func NewJSMessage(message *ethstate.Message) JSMessage {
+	return JSMessage{
+		To:        ethutil.Bytes2Hex(message.To),
+		From:      ethutil.Bytes2Hex(message.From),
+		Input:     ethutil.Bytes2Hex(message.Input),
+		Output:    ethutil.Bytes2Hex(message.Output),
+		Path:      message.Path,
+		Origin:    ethutil.Bytes2Hex(message.Origin),
+		Timestamp: int32(message.Timestamp),
+		Coinbase:  ethutil.Bytes2Hex(message.Origin),
+		Block:     ethutil.Bytes2Hex(message.Block),
+		Number:    int32(message.Number.Int64()),
+	}
+}
+
+type JSEthereum struct {
+	*ethpub.PEthereum
+	vm       *otto.Otto
+	ethereum *eth.Ethereum
+}
+
+func (self *JSEthereum) GetBlock(hash string) otto.Value {
+	return self.toVal(&JSBlock{self.PEthereum.GetBlock(hash), self})
+}
+
+func (self *JSEthereum) GetPeers() otto.Value {
+	return self.toVal(self.PEthereum.GetPeers())
+}
+
+func (self *JSEthereum) GetKey() otto.Value {
+	return self.toVal(self.PEthereum.GetKey())
+}
+
+func (self *JSEthereum) GetStateObject(addr string) otto.Value {
+	return self.toVal(&JSStateObject{self.PEthereum.GetStateObject(addr), self})
+}
+
+func (self *JSEthereum) GetStateKeyVals(addr string) otto.Value {
+	return self.toVal(self.PEthereum.GetStateObject(addr).StateKeyVal(false))
+}
+
+func (self *JSEthereum) Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr string) otto.Value {
+	r, err := self.PEthereum.Transact(key, recipient, valueStr, gasStr, gasPriceStr, dataStr)
+	if err != nil {
+		fmt.Println(err)
+
+		return otto.UndefinedValue()
+	}
+
+	return self.toVal(r)
+}
+
+func (self *JSEthereum) Create(key, valueStr, gasStr, gasPriceStr, scriptStr string) otto.Value {
+	r, err := self.PEthereum.Create(key, valueStr, gasStr, gasPriceStr, scriptStr)
+
+	if err != nil {
+		fmt.Println(err)
+
+		return otto.UndefinedValue()
+	}
+
+	return self.toVal(r)
+}
+
+func (self *JSEthereum) toVal(v interface{}) otto.Value {
+	result, err := self.vm.ToValue(v)
+
+	if err != nil {
+		fmt.Println("Value unknown:", err)
+
+		return otto.UndefinedValue()
+	}
+
+	return result
+}
+
+func (self *JSEthereum) Messages(object map[string]interface{}) otto.Value {
+	filter := ethchain.NewFilter(self.ethereum)
+
+	if object["earliest"] != nil {
+		earliest := object["earliest"]
+		if e, ok := earliest.(string); ok {
+			filter.SetEarliestBlock(ethutil.Hex2Bytes(e))
+		} else {
+			filter.SetEarliestBlock(earliest)
+		}
+	}
+	if object["latest"] != nil {
+		latest := object["latest"]
+		if l, ok := latest.(string); ok {
+			filter.SetLatestBlock(ethutil.Hex2Bytes(l))
+		} else {
+			filter.SetLatestBlock(latest)
+		}
+	}
+	if object["to"] != nil {
+		filter.SetTo(ethutil.Hex2Bytes(object["to"].(string)))
+	}
+	if object["from"] != nil {
+		filter.SetFrom(ethutil.Hex2Bytes(object["from"].(string)))
+	}
+	if object["max"] != nil {
+		filter.SetMax(object["max"].(int))
+	}
+	if object["skip"] != nil {
+		filter.SetSkip(object["skip"].(int))
+	}
+
+	messages := filter.Find()
+	var msgs []JSMessage
+	for _, m := range messages {
+		msgs = append(msgs, NewJSMessage(m))
+	}
+
+	v, _ := self.vm.ToValue(msgs)
+
+	return v
+}