255 lines
6.0 KiB
Go
255 lines
6.0 KiB
Go
// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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// MA 02110-1301 USA
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package main
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import (
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"bufio"
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"fmt"
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"os"
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"path"
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"strings"
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"github.com/ethereum/go-ethereum/cmd/utils"
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"github.com/ethereum/go-ethereum/common/natspec"
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"github.com/ethereum/go-ethereum/eth"
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re "github.com/ethereum/go-ethereum/jsre"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/ethereum/go-ethereum/xeth"
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"github.com/peterh/liner"
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"github.com/robertkrimen/otto"
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)
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type prompter interface {
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AppendHistory(string)
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Prompt(p string) (string, error)
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PasswordPrompt(p string) (string, error)
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}
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type dumbterm struct{ r *bufio.Reader }
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func (r dumbterm) Prompt(p string) (string, error) {
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fmt.Print(p)
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return r.r.ReadString('\n')
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}
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func (r dumbterm) PasswordPrompt(p string) (string, error) {
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fmt.Println("!! Unsupported terminal, password will echo.")
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fmt.Print(p)
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input, err := bufio.NewReader(os.Stdin).ReadString('\n')
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fmt.Println()
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return input, err
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}
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func (r dumbterm) AppendHistory(string) {}
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type jsre struct {
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re *re.JSRE
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ethereum *eth.Ethereum
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xeth *xeth.XEth
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ps1 string
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atexit func()
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prompter
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}
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func newJSRE(ethereum *eth.Ethereum, libPath string, interactive bool) *jsre {
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js := &jsre{ethereum: ethereum, ps1: "> "}
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js.xeth = xeth.New(ethereum, js)
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js.re = re.New(libPath)
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js.apiBindings()
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js.adminBindings()
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if !liner.TerminalSupported() || !interactive {
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js.prompter = dumbterm{bufio.NewReader(os.Stdin)}
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} else {
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lr := liner.NewLiner()
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js.withHistory(func(hist *os.File) { lr.ReadHistory(hist) })
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lr.SetCtrlCAborts(true)
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js.prompter = lr
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js.atexit = func() {
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js.withHistory(func(hist *os.File) { hist.Truncate(0); lr.WriteHistory(hist) })
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lr.Close()
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}
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}
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return js
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}
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func (js *jsre) apiBindings() {
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ethApi := rpc.NewEthereumApi(js.xeth)
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//js.re.Bind("jeth", rpc.NewJeth(ethApi, js.re.ToVal))
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jeth := rpc.NewJeth(ethApi, js.re.ToVal, js.re)
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//js.re.Bind("jeth", jeth)
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js.re.Set("jeth", struct{}{})
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t, _ := js.re.Get("jeth")
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jethObj := t.Object()
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jethObj.Set("send", jeth.Send)
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err := js.re.Compile("bignumber.js", re.BigNumber_JS)
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if err != nil {
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utils.Fatalf("Error loading bignumber.js: %v", err)
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}
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// we need to declare a dummy setTimeout. Otto does not support it
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_, err = js.re.Eval("setTimeout = function(cb, delay) {};")
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if err != nil {
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utils.Fatalf("Error defining setTimeout: %v", err)
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}
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err = js.re.Compile("ethereum.js", re.Ethereum_JS)
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if err != nil {
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utils.Fatalf("Error loading ethereum.js: %v", err)
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}
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_, err = js.re.Eval("var web3 = require('ethereum.js');")
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if err != nil {
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utils.Fatalf("Error requiring web3: %v", err)
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}
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_, err = js.re.Eval("web3.setProvider(jeth)")
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if err != nil {
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utils.Fatalf("Error setting web3 provider: %v", err)
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}
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_, err = js.re.Eval(`
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var eth = web3.eth;
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var shh = web3.shh;
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var db = web3.db;
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var net = web3.net;
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`)
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if err != nil {
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utils.Fatalf("Error setting namespaces: %v", err)
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}
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js.re.Eval(globalRegistrar + "registrar = new GlobalRegistrar(\"" + globalRegistrarAddr + "\");")
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}
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func (self *jsre) ConfirmTransaction(tx string) bool {
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var notice string
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nat, err := natspec.New(self.xeth, tx)
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if err == nil {
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notice, err = nat.Notice()
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}
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if err != nil {
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notice = fmt.Sprintf("About to submit transaction: %v")
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}
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fmt.Println(notice)
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answer, _ := self.Prompt("Confirm Transaction\n[y/n] ")
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return strings.HasPrefix(strings.Trim(answer, " "), "y")
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}
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func (self *jsre) UnlockAccount(addr []byte) bool {
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fmt.Printf("Please unlock account %x.\n", addr)
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pass, err := self.PasswordPrompt("Passphrase: ")
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if err != nil {
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return false
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}
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// TODO: allow retry
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if err := self.ethereum.AccountManager().Unlock(addr, pass); err != nil {
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return false
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} else {
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fmt.Println("Account is now unlocked for this session.")
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return true
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}
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}
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func (self *jsre) exec(filename string) error {
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if err := self.re.Exec(filename); err != nil {
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return fmt.Errorf("Javascript Error: %v", err)
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}
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return nil
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}
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func (self *jsre) interactive() {
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for {
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input, err := self.Prompt(self.ps1)
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if err != nil {
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break
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}
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if input == "" {
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continue
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}
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str += input + "\n"
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self.setIndent()
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if indentCount <= 0 {
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if input == "exit" {
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break
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}
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hist := str[:len(str)-1]
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self.AppendHistory(hist)
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self.parseInput(str)
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str = ""
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}
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}
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if self.atexit != nil {
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self.atexit()
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}
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}
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func (self *jsre) withHistory(op func(*os.File)) {
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hist, err := os.OpenFile(path.Join(self.ethereum.DataDir, "history"), os.O_RDWR|os.O_CREATE, os.ModePerm)
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if err != nil {
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fmt.Printf("unable to open history file: %v\n", err)
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return
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}
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op(hist)
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hist.Close()
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}
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func (self *jsre) parseInput(code string) {
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defer func() {
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if r := recover(); r != nil {
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fmt.Println("[native] error", r)
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}
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}()
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value, err := self.re.Run(code)
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if err != nil {
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if ottoErr, ok := err.(*otto.Error); ok {
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fmt.Println(ottoErr.String())
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} else {
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fmt.Println(err)
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}
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return
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}
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self.printValue(value)
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}
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var indentCount = 0
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var str = ""
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func (self *jsre) setIndent() {
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open := strings.Count(str, "{")
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open += strings.Count(str, "(")
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closed := strings.Count(str, "}")
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closed += strings.Count(str, ")")
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indentCount = open - closed
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if indentCount <= 0 {
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self.ps1 = "> "
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} else {
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self.ps1 = strings.Join(make([]string, indentCount*2), "..")
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self.ps1 += " "
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}
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}
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func (self *jsre) printValue(v interface{}) {
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val, err := self.re.PrettyPrint(v)
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if err == nil {
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fmt.Printf("%v", val)
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}
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}
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