1 files changed, 323 insertions, 0 deletions
diff --git a/cmd/utils/jeth.go b/cmd/utils/jeth.go
new file mode 100644
index 000000000..b460597c1
--- /dev/null
+++ b/cmd/utils/jeth.go
@@ -0,0 +1,323 @@
+// Copyright 2015 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package utils
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/ethereum/go-ethereum/jsre"
+	"github.com/ethereum/go-ethereum/rpc"
+
+	"github.com/robertkrimen/otto"
+)
+
+type Jeth struct {
+	re     *jsre.JSRE
+	client rpc.Client
+}
+
+// NewJeth create a new backend for the JSRE console
+func NewJeth(re *jsre.JSRE, client rpc.Client) *Jeth {
+	return &Jeth{re, client}
+}
+
+func (self *Jeth) err(call otto.FunctionCall, code int, msg string, id *int64) (response otto.Value) {
+	m := rpc.JSONErrResponse{
+		Version: "2.0",
+		Id:      id,
+		Error: rpc.JSONError{
+			Code:    code,
+			Message: msg,
+		},
+	}
+
+	errObj, _ := json.Marshal(m.Error)
+	errRes, _ := json.Marshal(m)
+
+	call.Otto.Run("ret_error = " + string(errObj))
+	res, _ := call.Otto.Run("ret_response = " + string(errRes))
+
+	return res
+}
+
+// UnlockAccount asks the user for the password and than executes the jeth.UnlockAccount callback in the jsre
+func (self *Jeth) UnlockAccount(call otto.FunctionCall) (response otto.Value) {
+	var cmd, account, passwd string
+	timeout := int64(300)
+	var ok bool
+
+	if len(call.ArgumentList) == 0 {
+		fmt.Println("expected address of account to unlock")
+		return otto.FalseValue()
+	}
+
+	if len(call.ArgumentList) >= 1 {
+		if accountExport, err := call.Argument(0).Export(); err == nil {
+			if account, ok = accountExport.(string); ok {
+				if len(call.ArgumentList) == 1 {
+					fmt.Printf("Unlock account %s\n", account)
+					passwd, err = PromptPassword("Passphrase: ", true)
+					if err != nil {
+						return otto.FalseValue()
+					}
+				}
+			}
+		}
+	}
+	if len(call.ArgumentList) >= 2 {
+		if passwdExport, err := call.Argument(1).Export(); err == nil {
+			passwd, _ = passwdExport.(string)
+		}
+	}
+
+	if len(call.ArgumentList) >= 3 {
+		if timeoutExport, err := call.Argument(2).Export(); err == nil {
+			timeout, _ = timeoutExport.(int64)
+		}
+	}
+
+	cmd = fmt.Sprintf("jeth.unlockAccount('%s', '%s', %d)", account, passwd, timeout)
+	if val, err := call.Otto.Run(cmd); err == nil {
+		return val
+	}
+
+	return otto.FalseValue()
+}
+
+// NewAccount asks the user for the password and than executes the jeth.newAccount callback in the jsre
+func (self *Jeth) NewAccount(call otto.FunctionCall) (response otto.Value) {
+	if len(call.ArgumentList) == 0 {
+		passwd, err := PromptPassword("Passphrase: ", true)
+		if err != nil {
+			return otto.FalseValue()
+		}
+		passwd2, err := PromptPassword("Repeat passphrase: ", true)
+		if err != nil {
+			return otto.FalseValue()
+		}
+
+		if passwd != passwd2 {
+			fmt.Println("Passphrases don't match")
+			return otto.FalseValue()
+		}
+
+		cmd := fmt.Sprintf("jeth.newAccount('%s')", passwd)
+		if val, err := call.Otto.Run(cmd); err == nil {
+			return val
+		}
+	} else {
+		fmt.Println("New account doesn't expect argument(s), you will be prompted for a password")
+	}
+
+	return otto.FalseValue()
+}
+
+func (self *Jeth) Send(call otto.FunctionCall) (response otto.Value) {
+	reqif, err := call.Argument(0).Export()
+	if err != nil {
+		return self.err(call, -32700, err.Error(), nil)
+	}
+
+	jsonreq, err := json.Marshal(reqif)
+	var reqs []rpc.JSONRequest
+	batch := true
+	err = json.Unmarshal(jsonreq, &reqs)
+	if err != nil {
+		reqs = make([]rpc.JSONRequest, 1)
+		err = json.Unmarshal(jsonreq, &reqs[0])
+		batch = false
+	}
+
+	call.Otto.Set("response_len", len(reqs))
+	call.Otto.Run("var ret_response = new Array(response_len);")
+
+	for i, req := range reqs {
+		err := self.client.Send(&req)
+		if err != nil {
+			return self.err(call, -32603, err.Error(), req.Id)
+		}
+
+		result := make(map[string]interface{})
+		err = self.client.Recv(&result)
+		if err != nil {
+			return self.err(call, -32603, err.Error(), req.Id)
+		}
+
+		_, isSuccessResponse := result["result"]
+		_, isErrorResponse := result["error"]
+		if !isSuccessResponse && !isErrorResponse {
+			return self.err(call, -32603, fmt.Sprintf("Invalid response"), new(int64))
+		}
+
+		id, _ := result["id"]
+		call.Otto.Set("ret_id", id)
+
+		jsonver, _ := result["jsonrpc"]
+		call.Otto.Set("ret_jsonrpc", jsonver)
+
+		var payload []byte
+		if isSuccessResponse {
+			payload, _ = json.Marshal(result["result"])
+		} else if isErrorResponse {
+			payload, _ = json.Marshal(result["error"])
+		}
+		call.Otto.Set("ret_result", string(payload))
+		call.Otto.Set("response_idx", i)
+
+		response, err = call.Otto.Run(`
+		ret_response[response_idx] = { jsonrpc: ret_jsonrpc, id: ret_id, result: JSON.parse(ret_result) };
+		`)
+	}
+
+	if !batch {
+		call.Otto.Run("ret_response = ret_response[0];")
+	}
+
+	if call.Argument(1).IsObject() {
+		call.Otto.Set("callback", call.Argument(1))
+		call.Otto.Run(`
+		if (Object.prototype.toString.call(callback) == '[object Function]') {
+			callback(null, ret_response);
+		}
+		`)
+	}
+
+	return
+}
+
+/*
+// handleRequest will handle user agent requests by interacting with the user and sending
+// the user response back to the geth service
+func (self *Jeth) handleRequest(req *shared.Request) bool {
+	var err error
+	var args []interface{}
+	if err = json.Unmarshal(req.Params, &args); err != nil {
+		glog.V(logger.Info).Infof("Unable to parse agent request - %v\n", err)
+		return false
+	}
+
+	switch req.Method {
+	case useragent.AskPasswordMethod:
+		return self.askPassword(req.Id, req.Jsonrpc, args)
+	case useragent.ConfirmTransactionMethod:
+		return self.confirmTransaction(req.Id, req.Jsonrpc, args)
+	}
+
+	return false
+}
+
+// askPassword will ask the user to supply the password for a given account
+func (self *Jeth) askPassword(id interface{}, jsonrpc string, args []interface{}) bool {
+	var err error
+	var passwd string
+	if len(args) >= 1 {
+		if account, ok := args[0].(string); ok {
+			fmt.Printf("Unlock account %s\n", account)
+		} else {
+			return false
+		}
+	}
+	passwd, err = PromptPassword("Passphrase: ", true)
+
+	if err = self.client.Send(shared.NewRpcResponse(id, jsonrpc, passwd, err)); err != nil {
+		glog.V(logger.Info).Infof("Unable to send user agent ask password response - %v\n", err)
+	}
+
+	return err == nil
+}
+
+func (self *Jeth) confirmTransaction(id interface{}, jsonrpc string, args []interface{}) bool {
+	// Accept all tx which are send from this console
+	return self.client.Send(shared.NewRpcResponse(id, jsonrpc, true, nil)) == nil
+}
+*/
+
+// throwJSExeception panics on an otto value, the Otto VM will then throw msg as a javascript error.
+func throwJSExeception(msg interface{}) otto.Value {
+	p, _ := otto.ToValue(msg)
+	panic(p)
+	return p
+}
+
+// Sleep will halt the console for arg[0] seconds.
+func (self *Jeth) Sleep(call otto.FunctionCall) (response otto.Value) {
+	if len(call.ArgumentList) >= 1 {
+		if call.Argument(0).IsNumber() {
+			sleep, _ := call.Argument(0).ToInteger()
+			time.Sleep(time.Duration(sleep) * time.Second)
+			return otto.TrueValue()
+		}
+	}
+	return throwJSExeception("usage: sleep(<sleep in seconds>)")
+}
+
+// SleepBlocks will wait for a specified number of new blocks or max for a
+// given of seconds. sleepBlocks(nBlocks[, maxSleep]).
+func (self *Jeth) SleepBlocks(call otto.FunctionCall) (response otto.Value) {
+	nBlocks := int64(0)
+	maxSleep := int64(9999999999999999) // indefinitely
+
+	nArgs := len(call.ArgumentList)
+
+	if nArgs == 0 {
+		throwJSExeception("usage: sleepBlocks(<n blocks>[, max sleep in seconds])")
+	}
+
+	if nArgs >= 1 {
+		if call.Argument(0).IsNumber() {
+			nBlocks, _ = call.Argument(0).ToInteger()
+		} else {
+			throwJSExeception("expected number as first argument")
+		}
+	}
+
+	if nArgs >= 2 {
+		if call.Argument(1).IsNumber() {
+			maxSleep, _ = call.Argument(1).ToInteger()
+		} else {
+			throwJSExeception("expected number as second argument")
+		}
+	}
+
+	// go through the console, this will allow web3 to call the appropriate
+	// callbacks if a delayed response or notification is received.
+	currentBlockNr := func() int64 {
+		result, err := call.Otto.Run("eth.blockNumber")
+		if err != nil {
+			throwJSExeception(err.Error())
+		}
+		blockNr, err := result.ToInteger()
+		if err != nil {
+			throwJSExeception(err.Error())
+		}
+		return blockNr
+	}
+
+	targetBlockNr := currentBlockNr() + nBlocks
+	deadline := time.Now().Add(time.Duration(maxSleep) * time.Second)
+
+	for time.Now().Before(deadline) {
+		if currentBlockNr() >= targetBlockNr {
+			return otto.TrueValue()
+		}
+		time.Sleep(time.Second)
+	}
+
+	return otto.FalseValue()
+}