aboutsummaryrefslogtreecommitdiffstats
path: root/cmd/utils/jeth.go
blob: b460597c133787bedfdc869d0fb2b31be17b2f2f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
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()
}