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
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
|
/*
This file is part of TALER
(C) 2015-2016 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* Page shown to the user to confirm creation
* of a reserve, usually requested by the bank.
*
* @author Florian Dold
*/
import {amountToPretty, canonicalizeBaseUrl} from "src/helpers";
import {
AmountJson, CreateReserveResponse,
ReserveCreationInfo, Amounts,
Denomination, DenominationRecord,
} from "src/types";
import {getReserveCreationInfo} from "src/wxApi";
import {ImplicitStateComponent, StateHolder} from "src/components";
"use strict";
function delay<T>(delayMs: number, value: T): Promise<T> {
return new Promise<T>((resolve, reject) => {
setTimeout(() => resolve(value), delayMs);
});
}
class EventTrigger {
triggerResolve: any;
triggerPromise: Promise<boolean>;
constructor() {
this.reset();
}
private reset() {
this.triggerPromise = new Promise<boolean>((resolve, reject) => {
this.triggerResolve = resolve;
});
}
trigger() {
this.triggerResolve(false);
this.reset();
}
async wait(delayMs: number): Promise<boolean> {
return await Promise.race([this.triggerPromise, delay(delayMs, true)]);
}
}
function renderReserveCreationDetails(rci: ReserveCreationInfo|null) {
if (!rci) {
return <p>
Details will be displayed when a valid exchange provider URL is entered.</p>
}
let denoms = rci.selectedDenoms;
let countByPub: {[s: string]: number} = {};
let uniq: DenominationRecord[] = [];
denoms.forEach((x: DenominationRecord) => {
let c = countByPub[x.denomPub] || 0;
if (c == 0) {
uniq.push(x);
}
c += 1;
countByPub[x.denomPub] = c;
});
function row(denom: DenominationRecord) {
return (
<tr>
<td>{countByPub[denom.denomPub] + "x"}</td>
<td>{amountToPretty(denom.value)}</td>
<td>{amountToPretty(denom.feeWithdraw)}</td>
<td>{amountToPretty(denom.feeRefresh)}</td>
<td>{amountToPretty(denom.feeDeposit)}</td>
</tr>
);
}
let withdrawFeeStr = amountToPretty(rci.withdrawFee);
let overheadStr = amountToPretty(rci.overhead);
return (
<div>
<p>{i18n`Withdrawal fees: ${withdrawFeeStr}`}</p>
<p>{i18n`Rounding loss: ${overheadStr}`}</p>
<table>
<thead>
<th>{i18n`# Coins`}</th>
<th>{i18n`Value`}</th>
<th>{i18n`Withdraw Fee`}</th>
<th>{i18n`Refresh Fee`}</th>
<th>{i18n`Deposit Fee`}</th>
</thead>
<tbody>
{uniq.map(row)}
</tbody>
</table>
</div>
);
}
function getSuggestedExchange(currency: string): Promise<string> {
// TODO: make this request go to the wallet backend
// Right now, this is a stub.
const defaultExchange: {[s: string]: string} = {
"KUDOS": "https://exchange.demo.taler.net",
"PUDOS": "https://exchange.test.taler.net",
};
let exchange = defaultExchange[currency];
if (!exchange) {
exchange = ""
}
return Promise.resolve(exchange);
}
function WithdrawFee(props: {reserveCreationInfo: ReserveCreationInfo|null}): JSX.Element {
if (props.reserveCreationInfo) {
let {overhead, withdrawFee} = props.reserveCreationInfo;
let totalCost = Amounts.add(overhead, withdrawFee).amount;
return <p>{i18n`Withdraw fees:`} {amountToPretty(totalCost)}</p>;
}
return <p />;
}
interface ExchangeSelectionProps {
suggestedExchangeUrl: string;
amount: AmountJson;
callback_url: string;
wt_types: string[];
}
class ExchangeSelection extends ImplicitStateComponent<ExchangeSelectionProps> {
statusString: StateHolder<string|null> = this.makeState(null);
reserveCreationInfo: StateHolder<ReserveCreationInfo|null> = this.makeState(
null);
url: StateHolder<string|null> = this.makeState(null);
detailCollapsed: StateHolder<boolean> = this.makeState(true);
updateEvent = new EventTrigger();
constructor(props: ExchangeSelectionProps) {
super(props);
this.onUrlChanged(props.suggestedExchangeUrl || null);
}
renderAdvanced(): JSX.Element {
if (this.detailCollapsed() && this.url() !== null && !this.statusString()) {
return (
<button className="linky"
onClick={() => this.detailCollapsed(false)}>
{i18n`view fee structure / select different exchange provider`}
</button>
);
}
return (
<div>
<h2>Provider Selection</h2>
<label>URL: </label>
<input className="url" type="text" spellCheck={false}
value={this.url()!}
key="exchange-url-input"
onInput={(e) => this.onUrlChanged((e.target as HTMLInputElement).value)}/>
<br />
{this.renderStatus()}
<h2>{i18n`Detailed Fee Structure`}</h2>
{renderReserveCreationDetails(this.reserveCreationInfo())}
</div>)
}
renderFee() {
if (!this.reserveCreationInfo()) {
return "??";
}
let rci = this.reserveCreationInfo()!;
let totalCost = Amounts.add(rci.overhead, rci.withdrawFee).amount;
return `${amountToPretty(totalCost)}`;
}
renderFeeStatus() {
if (this.reserveCreationInfo()) {
return (
<i18n.Translate wrap="p">
The exchange provider will charge
{" "}
<span>{this.renderFee()}</span>
{" "}
in fees.
</i18n.Translate>
);
}
if (this.url() && !this.statusString()) {
let shortName = URI(this.url()!).host();
return (
<i18n.Translate wrap="p">
Waiting for a response from
{" "}
<em>{shortName}</em>
</i18n.Translate>
);
}
if (this.statusString()) {
return (
<p>
<strong style={{color: "red"}}>{i18n`A problem occured, see below.`}</strong>
</p>
);
}
return (
<p>
{i18n`Information about fees will be available when an exchange provider is selected.`}
</p>
);
}
render(): JSX.Element {
return (
<div>
<i18n.Translate wrap="p">
{"You are about to withdraw "}
<strong>{amountToPretty(this.props.amount)}</strong>
{" from your bank account into your wallet."}
</i18n.Translate>
{this.renderFeeStatus()}
<button className="accept"
disabled={this.reserveCreationInfo() == null}
onClick={() => this.confirmReserve()}>
{i18n`Accept fees and withdraw`}
</button>
<br/>
{this.renderAdvanced()}
</div>
);
}
confirmReserve() {
this.confirmReserveImpl(this.reserveCreationInfo()!,
this.url()!,
this.props.amount,
this.props.callback_url);
}
/**
* Do an update of the reserve creation info, without any debouncing.
*/
async forceReserveUpdate() {
this.reserveCreationInfo(null);
if (!this.url()) {
this.statusString(i18n`Error: URL is empty`);
this.detailCollapsed(false);
return;
}
this.statusString(null);
let parsedUrl = URI(this.url()!);
if (parsedUrl.is("relative")) {
this.statusString(i18n`Error: URL may not be relative`);
return;
}
try {
let url = canonicalizeBaseUrl(this.url()!);
let r = await getReserveCreationInfo(url,
this.props.amount);
console.log("get exchange info resolved");
this.reserveCreationInfo(r);
console.dir(r);
} catch (e) {
console.log("get exchange info rejected");
if (e.hasOwnProperty("httpStatus")) {
this.statusString(`Error: request failed with status ${e.httpStatus}`);
this.detailCollapsed(false);
} else if (e.hasOwnProperty("errorResponse")) {
let resp = e.errorResponse;
this.statusString(`Error: ${resp.error} (${resp.hint})`);
this.detailCollapsed(false);
}
}
}
reset() {
this.statusString(null);
this.reserveCreationInfo(null);
}
confirmReserveImpl(rci: ReserveCreationInfo,
exchange: string,
amount: AmountJson,
callback_url: string) {
const d = {exchange: canonicalizeBaseUrl(exchange), amount};
const cb = (rawResp: any) => {
if (!rawResp) {
throw Error("empty response");
}
// FIXME: filter out types that bank/exchange don't have in common
let wire_details = rci.wireInfo;
if (!rawResp.error) {
const resp = CreateReserveResponse.checked(rawResp);
let q: {[name: string]: string|number} = {
wire_details: JSON.stringify(wire_details),
exchange: resp.exchange,
reserve_pub: resp.reservePub,
amount_value: amount.value,
amount_fraction: amount.fraction,
amount_currency: amount.currency,
};
let url = URI(callback_url).addQuery(q);
if (!url.is("absolute")) {
throw Error("callback url is not absolute");
}
console.log("going to", url.href());
document.location.href = url.href();
} else {
this.reset();
this.statusString(
i18n`Oops, something went wrong. The wallet responded with error status (${rawResp.error}).`);
this.detailCollapsed(false);
}
};
chrome.runtime.sendMessage({type: 'create-reserve', detail: d}, cb);
}
async onUrlChanged(url: string|null) {
this.reset();
this.url(url);
if (url == undefined) {
return;
}
this.updateEvent.trigger();
let waited = await this.updateEvent.wait(200);
if (waited) {
// Run the actual update if nobody else preempted us.
this.forceReserveUpdate();
this.forceUpdate();
}
}
renderStatus(): any {
if (this.statusString()) {
return <p><strong style={{color: "red"}}>{this.statusString()}</strong></p>;
} else if (!this.reserveCreationInfo()) {
return <p>{i18n`Checking URL, please wait ...`}</p>;
}
return "";
}
}
export async function main() {
try {
const url = URI(document.location.href);
const query: any = URI.parseQuery(url.query());
let amount;
try {
amount = AmountJson.checked(JSON.parse(query.amount));
} catch (e) {
throw Error(i18n`Can't parse amount: ${e.message}`);
}
const callback_url = query.callback_url;
const bank_url = query.bank_url;
let wt_types;
try {
wt_types = JSON.parse(query.wt_types);
} catch (e) {
throw Error(i18n`Can't parse wire_types: ${e.message}`);
}
const suggestedExchangeUrl = await getSuggestedExchange(amount.currency);
let args = {
wt_types,
suggestedExchangeUrl,
callback_url,
amount
};
ReactDOM.render(<ExchangeSelection {...args} />, document.getElementById(
"exchange-selection")!);
} catch (e) {
// TODO: provide more context information, maybe factor it out into a
// TODO:generic error reporting function or component.
document.body.innerText = i18n`Fatal error: "${e.message}".`;
console.error(`got error "${e.message}"`, e);
}
}
|