2214 lines
67 KiB
TypeScript
2214 lines
67 KiB
TypeScript
/*
|
|
This file is part of TALER
|
|
(C) 2015 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/>
|
|
*/
|
|
|
|
/**
|
|
* High-level wallet operations that should be indepentent from the underlying
|
|
* browser extension interface.
|
|
* @module Wallet
|
|
* @author Florian Dold
|
|
*/
|
|
|
|
import {
|
|
AmountJson,
|
|
Amounts,
|
|
CoinRecord,
|
|
CoinPaySig,
|
|
Contract,
|
|
CreateReserveResponse,
|
|
Denomination,
|
|
ExchangeHandle,
|
|
ExchangeRecord,
|
|
Notifier,
|
|
PayCoinInfo,
|
|
PreCoinRecord,
|
|
RefreshSessionRecord,
|
|
ReserveCreationInfo,
|
|
ReserveRecord,
|
|
CurrencyRecord,
|
|
Auditor,
|
|
AuditorRecord,
|
|
WalletBalance,
|
|
WalletBalanceEntry,
|
|
WireFee,
|
|
ExchangeWireFeesRecord,
|
|
WireInfo,
|
|
DenominationRecord,
|
|
DenominationStatus,
|
|
CoinStatus,
|
|
PaybackConfirmation,
|
|
} from "./types";
|
|
import {
|
|
HttpRequestLibrary,
|
|
HttpResponse,
|
|
RequestException,
|
|
} from "./http";
|
|
import {
|
|
AbortTransaction,
|
|
Index,
|
|
JoinResult,
|
|
QueryRoot,
|
|
Store, JoinLeftResult,
|
|
} from "./query";
|
|
import {Checkable} from "./checkable";
|
|
import {
|
|
amountToPretty,
|
|
canonicalizeBaseUrl,
|
|
canonicalJson,
|
|
deepEquals,
|
|
flatMap,
|
|
getTalerStampSec,
|
|
} from "./helpers";
|
|
import {CryptoApi} from "./cryptoApi";
|
|
import URI = require("urijs");
|
|
|
|
"use strict";
|
|
|
|
export interface CoinWithDenom {
|
|
coin: CoinRecord;
|
|
denom: DenominationRecord;
|
|
}
|
|
|
|
@Checkable.Class
|
|
export class Payback {
|
|
@Checkable.String
|
|
h_denom_pub: string;
|
|
}
|
|
|
|
|
|
@Checkable.Class
|
|
export class KeysJson {
|
|
@Checkable.List(Checkable.Value(Denomination))
|
|
denoms: Denomination[];
|
|
|
|
@Checkable.String
|
|
master_public_key: string;
|
|
|
|
@Checkable.Any
|
|
auditors: any[];
|
|
|
|
@Checkable.String
|
|
list_issue_date: string;
|
|
|
|
@Checkable.List(Checkable.Value(Payback))
|
|
payback?: Payback[];
|
|
|
|
@Checkable.Any
|
|
signkeys: any;
|
|
|
|
@Checkable.String
|
|
eddsa_pub: string;
|
|
|
|
@Checkable.String
|
|
eddsa_sig: string;
|
|
|
|
static checked: (obj: any) => KeysJson;
|
|
}
|
|
|
|
|
|
|
|
|
|
@Checkable.Class
|
|
class WireFeesJson {
|
|
@Checkable.Value(AmountJson)
|
|
wire_fee: AmountJson;
|
|
|
|
@Checkable.Value(AmountJson)
|
|
closing_fee: AmountJson;
|
|
|
|
@Checkable.String
|
|
sig: string;
|
|
|
|
@Checkable.String
|
|
start_date: string;
|
|
|
|
@Checkable.String
|
|
end_date: string;
|
|
|
|
static checked: (obj: any) => WireFeesJson;
|
|
}
|
|
|
|
|
|
@Checkable.ClassWithExtra
|
|
class WireDetailJson {
|
|
@Checkable.String
|
|
type: string;
|
|
|
|
@Checkable.List(Checkable.Value(WireFeesJson))
|
|
fees: WireFeesJson[];
|
|
|
|
static checked: (obj: any) => WireDetailJson;
|
|
}
|
|
|
|
|
|
@Checkable.Class
|
|
export class CreateReserveRequest {
|
|
/**
|
|
* The initial amount for the reserve.
|
|
*/
|
|
@Checkable.Value(AmountJson)
|
|
amount: AmountJson;
|
|
|
|
/**
|
|
* Exchange URL where the bank should create the reserve.
|
|
*/
|
|
@Checkable.String
|
|
exchange: string;
|
|
|
|
static checked: (obj: any) => CreateReserveRequest;
|
|
}
|
|
|
|
|
|
@Checkable.Class
|
|
export class ConfirmReserveRequest {
|
|
/**
|
|
* Public key of then reserve that should be marked
|
|
* as confirmed.
|
|
*/
|
|
@Checkable.String
|
|
reservePub: string;
|
|
|
|
static checked: (obj: any) => ConfirmReserveRequest;
|
|
}
|
|
|
|
|
|
@Checkable.Class
|
|
export class OfferRecord {
|
|
@Checkable.Value(Contract)
|
|
contract: Contract;
|
|
|
|
@Checkable.String
|
|
merchant_sig: string;
|
|
|
|
@Checkable.String
|
|
H_contract: string;
|
|
|
|
@Checkable.Number
|
|
offer_time: number;
|
|
|
|
/**
|
|
* Serial ID when the offer is stored in the wallet DB.
|
|
*/
|
|
@Checkable.Optional(Checkable.Number)
|
|
id?: number;
|
|
|
|
static checked: (obj: any) => OfferRecord;
|
|
}
|
|
|
|
export interface HistoryRecord {
|
|
type: string;
|
|
timestamp: number;
|
|
subjectId?: string;
|
|
detail: any;
|
|
level: HistoryLevel;
|
|
}
|
|
|
|
|
|
interface PayReq {
|
|
coins: CoinPaySig[];
|
|
merchant_pub: string;
|
|
order_id: string;
|
|
exchange: string;
|
|
}
|
|
|
|
interface TransactionRecord {
|
|
contractHash: string;
|
|
contract: Contract;
|
|
payReq: PayReq;
|
|
merchantSig: string;
|
|
|
|
/**
|
|
* The transaction isn't active anymore, it's either successfully paid
|
|
* or refunded/aborted.
|
|
*/
|
|
finished: boolean;
|
|
}
|
|
|
|
export enum HistoryLevel {
|
|
Trace = 1,
|
|
Developer = 2,
|
|
Expert = 3,
|
|
User = 4,
|
|
}
|
|
|
|
|
|
export interface Badge {
|
|
setText(s: string): void;
|
|
setColor(c: string): void;
|
|
startBusy(): void;
|
|
stopBusy(): void;
|
|
}
|
|
|
|
export interface NonceRecord {
|
|
priv: string;
|
|
pub: string;
|
|
}
|
|
|
|
|
|
export interface ConfigRecord {
|
|
key: string;
|
|
value: any;
|
|
}
|
|
|
|
|
|
|
|
const builtinCurrencies: CurrencyRecord[] = [
|
|
{
|
|
name: "KUDOS",
|
|
fractionalDigits: 2,
|
|
auditors: [
|
|
{
|
|
baseUrl: "https://auditor.demo.taler.net/",
|
|
expirationStamp: (new Date(2027, 1)).getTime(),
|
|
auditorPub: "XN9KMN5G2KGPCAN0E89MM5HE8FV4WBWA9KDTMTDR817MWBCYA7H0",
|
|
},
|
|
],
|
|
exchanges: [],
|
|
},
|
|
{
|
|
name: "PUDOS",
|
|
fractionalDigits: 2,
|
|
auditors: [
|
|
],
|
|
exchanges: [
|
|
{ baseUrl: "https://exchange.test.taler.net/", priority: 0 },
|
|
],
|
|
},
|
|
];
|
|
|
|
|
|
function setTimeout(f: any, t: number) {
|
|
return chrome.extension.getBackgroundPage().setTimeout(f, t);
|
|
}
|
|
|
|
function setInterval(f: any, t: number) {
|
|
return chrome.extension.getBackgroundPage().setInterval(f, t);
|
|
}
|
|
|
|
|
|
function isWithdrawableDenom(d: DenominationRecord) {
|
|
const now_sec = (new Date).getTime() / 1000;
|
|
const stamp_withdraw_sec = getTalerStampSec(d.stampExpireWithdraw);
|
|
if (stamp_withdraw_sec == null) {
|
|
return false;
|
|
}
|
|
const stamp_start_sec = getTalerStampSec(d.stampStart);
|
|
if (stamp_start_sec == null) {
|
|
return false;
|
|
}
|
|
// Withdraw if still possible to withdraw within a minute
|
|
if ((stamp_withdraw_sec + 60 > now_sec) && (now_sec >= stamp_start_sec)) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
export type CoinSelectionResult = {exchangeUrl: string, cds: CoinWithDenom[]}|undefined;
|
|
|
|
export function selectCoins(cds: CoinWithDenom[], paymentAmount: AmountJson,
|
|
depositFeeLimit: AmountJson): CoinWithDenom[]|undefined {
|
|
if (cds.length == 0) {
|
|
return undefined;
|
|
}
|
|
// Sort by ascending deposit fee
|
|
cds.sort((o1, o2) => Amounts.cmp(o1.denom.feeDeposit,
|
|
o2.denom.feeDeposit));
|
|
let currency = cds[0].denom.value.currency;
|
|
let cdsResult: CoinWithDenom[] = [];
|
|
let accFee: AmountJson = Amounts.getZero(currency);
|
|
let accAmount: AmountJson = Amounts.getZero(currency);
|
|
let isBelowFee = false;
|
|
let coversAmount = false;
|
|
let coversAmountWithFee = false;
|
|
for (let i = 0; i < cds.length; i++) {
|
|
let {coin, denom} = cds[i];
|
|
if (coin.suspended) {
|
|
continue;
|
|
}
|
|
if (coin.status != CoinStatus.Fresh) {
|
|
continue;
|
|
}
|
|
if (Amounts.cmp(denom.feeDeposit, coin.currentAmount) >= 0) {
|
|
continue;
|
|
}
|
|
cdsResult.push(cds[i]);
|
|
accFee = Amounts.add(denom.feeDeposit, accFee).amount;
|
|
accAmount = Amounts.add(coin.currentAmount, accAmount).amount;
|
|
coversAmount = Amounts.cmp(accAmount, paymentAmount) >= 0;
|
|
coversAmountWithFee = Amounts.cmp(accAmount,
|
|
Amounts.add(paymentAmount,
|
|
denom.feeDeposit).amount) >= 0;
|
|
isBelowFee = Amounts.cmp(accFee, depositFeeLimit) <= 0;
|
|
if ((coversAmount && isBelowFee) || coversAmountWithFee) {
|
|
return cdsResult;
|
|
}
|
|
}
|
|
return undefined;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get a list of denominations (with repetitions possible)
|
|
* whose total value is as close as possible to the available
|
|
* amount, but never larger.
|
|
*/
|
|
function getWithdrawDenomList(amountAvailable: AmountJson,
|
|
denoms: DenominationRecord[]): DenominationRecord[] {
|
|
let remaining = Amounts.copy(amountAvailable);
|
|
const ds: DenominationRecord[] = [];
|
|
|
|
denoms = denoms.filter(isWithdrawableDenom);
|
|
denoms.sort((d1, d2) => Amounts.cmp(d2.value, d1.value));
|
|
|
|
// This is an arbitrary number of coins
|
|
// we can withdraw in one go. It's not clear if this limit
|
|
// is useful ...
|
|
for (let i = 0; i < 1000; i++) {
|
|
let found = false;
|
|
for (let d of denoms) {
|
|
let cost = Amounts.add(d.value, d.feeWithdraw).amount;
|
|
if (Amounts.cmp(remaining, cost) < 0) {
|
|
continue;
|
|
}
|
|
found = true;
|
|
remaining = Amounts.sub(remaining, cost).amount;
|
|
ds.push(d);
|
|
break;
|
|
}
|
|
if (!found) {
|
|
break;
|
|
}
|
|
}
|
|
return ds;
|
|
}
|
|
|
|
|
|
export namespace Stores {
|
|
class ExchangeStore extends Store<ExchangeRecord> {
|
|
constructor() {
|
|
super("exchanges", {keyPath: "baseUrl"});
|
|
}
|
|
|
|
pubKeyIndex = new Index<string,ExchangeRecord>(this, "pubKey", "masterPublicKey");
|
|
}
|
|
|
|
class NonceStore extends Store<NonceRecord> {
|
|
constructor() {
|
|
super("nonces", {keyPath: "pub"});
|
|
}
|
|
}
|
|
|
|
class CoinsStore extends Store<CoinRecord> {
|
|
constructor() {
|
|
super("coins", {keyPath: "coinPub"});
|
|
}
|
|
|
|
exchangeBaseUrlIndex = new Index<string,CoinRecord>(this, "exchangeBaseUrl", "exchangeBaseUrl");
|
|
denomPubIndex = new Index<string,CoinRecord>(this, "denomPub", "denomPub");
|
|
}
|
|
|
|
class HistoryStore extends Store<HistoryRecord> {
|
|
constructor() {
|
|
super("history", {
|
|
keyPath: "id",
|
|
autoIncrement: true
|
|
});
|
|
}
|
|
|
|
timestampIndex = new Index<number,HistoryRecord>(this, "timestamp", "timestamp");
|
|
}
|
|
|
|
class OffersStore extends Store<OfferRecord> {
|
|
constructor() {
|
|
super("offers", {
|
|
keyPath: "id",
|
|
autoIncrement: true
|
|
});
|
|
}
|
|
}
|
|
|
|
class TransactionsStore extends Store<TransactionRecord> {
|
|
constructor() {
|
|
super("transactions", {keyPath: "contractHash"});
|
|
}
|
|
|
|
fulfillmentUrlIndex = new Index<string,TransactionRecord>(this, "fulfillment_url", "contract.fulfillment_url");
|
|
orderIdIndex = new Index<string,TransactionRecord>(this, "order_id", "contract.order_id");
|
|
}
|
|
|
|
class DenominationsStore extends Store<DenominationRecord> {
|
|
constructor() {
|
|
// cast needed because of bug in type annotations
|
|
super("denominations",
|
|
{keyPath: ["exchangeBaseUrl", "denomPub"] as any as IDBKeyPath});
|
|
}
|
|
|
|
denomPubHashIndex = new Index<string,DenominationRecord>(this, "denomPubHash", "denomPubHash");
|
|
exchangeBaseUrlIndex = new Index<string, DenominationRecord>(this, "exchangeBaseUrl", "exchangeBaseUrl");
|
|
denomPubIndex = new Index<string, DenominationRecord>(this, "denomPub", "denomPub");
|
|
}
|
|
|
|
class CurrenciesStore extends Store<CurrencyRecord> {
|
|
constructor() {
|
|
super("currencies", {keyPath: "name"});
|
|
}
|
|
}
|
|
|
|
class ConfigStore extends Store<ConfigRecord> {
|
|
constructor() {
|
|
super("config", {keyPath: "key"});
|
|
}
|
|
}
|
|
|
|
class ExchangeWireFeesStore extends Store<ExchangeWireFeesRecord> {
|
|
constructor() {
|
|
super("exchangeWireFees", {keyPath: "exchangeBaseUrl"});
|
|
}
|
|
}
|
|
export const exchanges: ExchangeStore = new ExchangeStore();
|
|
export const exchangeWireFees: ExchangeWireFeesStore = new ExchangeWireFeesStore();
|
|
export const nonces: NonceStore = new NonceStore();
|
|
export const transactions: TransactionsStore = new TransactionsStore();
|
|
export const reserves: Store<ReserveRecord> = new Store<ReserveRecord>("reserves", {keyPath: "reserve_pub"});
|
|
export const coins: CoinsStore = new CoinsStore();
|
|
export const refresh: Store<RefreshSessionRecord> = new Store<RefreshSessionRecord>("refresh", {keyPath: "meltCoinPub"});
|
|
export const history: HistoryStore = new HistoryStore();
|
|
export const offers: OffersStore = new OffersStore();
|
|
export const precoins: Store<PreCoinRecord> = new Store<PreCoinRecord>("precoins", {keyPath: "coinPub"});
|
|
export const denominations: DenominationsStore = new DenominationsStore();
|
|
export const currencies: CurrenciesStore = new CurrenciesStore();
|
|
export const config: ConfigStore = new ConfigStore();
|
|
}
|
|
|
|
|
|
export class Wallet {
|
|
private db: IDBDatabase;
|
|
private http: HttpRequestLibrary;
|
|
private badge: Badge;
|
|
private notifier: Notifier;
|
|
public cryptoApi: CryptoApi;
|
|
|
|
private processPreCoinConcurrent = 0;
|
|
private processPreCoinThrottle: {[url: string]: number} = {};
|
|
|
|
/**
|
|
* Set of identifiers for running operations.
|
|
*/
|
|
private runningOperations: Set<string> = new Set();
|
|
|
|
q(): QueryRoot {
|
|
return new QueryRoot(this.db);
|
|
}
|
|
|
|
constructor(db: IDBDatabase,
|
|
http: HttpRequestLibrary,
|
|
badge: Badge,
|
|
notifier: Notifier) {
|
|
this.db = db;
|
|
this.http = http;
|
|
this.badge = badge;
|
|
this.notifier = notifier;
|
|
this.cryptoApi = new CryptoApi();
|
|
|
|
this.fillDefaults();
|
|
this.resumePendingFromDb();
|
|
|
|
setInterval(() => this.updateExchanges(), 1000 * 60 * 15);
|
|
}
|
|
|
|
private async fillDefaults() {
|
|
let onTrue = (r: QueryRoot) => {
|
|
console.log("defaults already applied");
|
|
};
|
|
let onFalse = (r: QueryRoot) => {
|
|
console.log("applying defaults");
|
|
r.put(Stores.config, {key: "currencyDefaultsApplied", value: true})
|
|
.putAll(Stores.currencies, builtinCurrencies)
|
|
.finish();
|
|
};
|
|
await (
|
|
this.q()
|
|
.iter(Stores.config)
|
|
.filter(x => x.key == "currencyDefaultsApplied")
|
|
.first()
|
|
.cond((x) => x && x.value, onTrue, onFalse)
|
|
);
|
|
}
|
|
|
|
|
|
private startOperation(operationId: string) {
|
|
this.runningOperations.add(operationId);
|
|
this.badge.startBusy();
|
|
}
|
|
|
|
private stopOperation(operationId: string) {
|
|
this.runningOperations.delete(operationId);
|
|
if (this.runningOperations.size == 0) {
|
|
this.badge.stopBusy();
|
|
}
|
|
}
|
|
|
|
async updateExchanges(): Promise<void> {
|
|
console.log("updating exchanges");
|
|
|
|
let exchangesUrls = await this.q()
|
|
.iter(Stores.exchanges)
|
|
.map((e) => e.baseUrl)
|
|
.toArray();
|
|
|
|
for (let url of exchangesUrls) {
|
|
this.updateExchangeFromUrl(url)
|
|
.catch((e) => {
|
|
console.error("updating exchange failed", e);
|
|
});
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Resume various pending operations that are pending
|
|
* by looking at the database.
|
|
*/
|
|
private resumePendingFromDb(): void {
|
|
console.log("resuming pending operations from db");
|
|
|
|
this.q()
|
|
.iter(Stores.reserves)
|
|
.reduce((reserve) => {
|
|
console.log("resuming reserve", reserve.reserve_pub);
|
|
this.processReserve(reserve);
|
|
});
|
|
|
|
this.q()
|
|
.iter(Stores.precoins)
|
|
.reduce((preCoin) => {
|
|
console.log("resuming precoin");
|
|
this.processPreCoin(preCoin);
|
|
});
|
|
|
|
this.q()
|
|
.iter(Stores.refresh)
|
|
.reduce((r: RefreshSessionRecord) => {
|
|
this.continueRefreshSession(r);
|
|
});
|
|
|
|
// FIXME: optimize via index
|
|
this.q()
|
|
.iter(Stores.coins)
|
|
.reduce((c: CoinRecord) => {
|
|
if (c.status == CoinStatus.Dirty) {
|
|
console.log("resuming pending refresh for coin", c);
|
|
this.refresh(c.coinPub);
|
|
}
|
|
});
|
|
}
|
|
|
|
|
|
/**
|
|
* Get exchanges and associated coins that are still spendable,
|
|
* but only if the sum the coins' remaining value exceeds the payment amount.
|
|
*/
|
|
private async getCoinsForPayment(paymentAmount: AmountJson,
|
|
wireMethod: string,
|
|
wireFeeTime: number,
|
|
depositFeeLimit: AmountJson,
|
|
wireFeeLimit: AmountJson,
|
|
wireFeeAmortization: number,
|
|
allowedExchanges: ExchangeHandle[],
|
|
allowedAuditors: Auditor[]): Promise<CoinSelectionResult> {
|
|
|
|
let exchanges = await this.q().iter(Stores.exchanges).toArray();
|
|
|
|
for (let exchange of exchanges) {
|
|
let isOkay: boolean = false;
|
|
|
|
// is the exchange explicitly allowed?
|
|
for (let allowedExchange of allowedExchanges) {
|
|
if (allowedExchange.master_pub == exchange.masterPublicKey) {
|
|
isOkay = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// is the exchange allowed because of one of its auditors?
|
|
if (!isOkay) {
|
|
for (let allowedAuditor of allowedAuditors) {
|
|
for (let auditor of exchange.auditors) {
|
|
if (auditor.auditor_pub == allowedAuditor.auditor_pub) {
|
|
isOkay = true;
|
|
break;
|
|
}
|
|
}
|
|
if (isOkay) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!isOkay) {
|
|
continue;
|
|
}
|
|
|
|
let coins: CoinRecord[] = await this.q()
|
|
.iterIndex(Stores.coins.exchangeBaseUrlIndex,
|
|
exchange.baseUrl)
|
|
.toArray();
|
|
if (!coins || coins.length == 0) {
|
|
continue;
|
|
}
|
|
// Denomination of the first coin, we assume that all other
|
|
// coins have the same currency
|
|
let firstDenom = await this.q().get(Stores.denominations,
|
|
[
|
|
exchange.baseUrl,
|
|
coins[0].denomPub
|
|
]);
|
|
if (!firstDenom) {
|
|
throw Error("db inconsistent");
|
|
}
|
|
let currency = firstDenom.value.currency;
|
|
let cds: CoinWithDenom[] = [];
|
|
for (let i = 0; i < coins.length; i++) {
|
|
let coin = coins[i];
|
|
let denom = await this.q().get(Stores.denominations,
|
|
[exchange.baseUrl, coin.denomPub]);
|
|
if (!denom) {
|
|
throw Error("db inconsistent");
|
|
}
|
|
if (denom.value.currency != currency) {
|
|
console.warn(`same pubkey for different currencies at exchange ${exchange.baseUrl}`);
|
|
continue;
|
|
}
|
|
if (coin.suspended) {
|
|
continue;
|
|
}
|
|
if (coin.status != CoinStatus.Fresh) {
|
|
continue;
|
|
}
|
|
cds.push({coin, denom});
|
|
}
|
|
|
|
let fees = await this.q().get(Stores.exchangeWireFees, exchange.baseUrl);
|
|
if (!fees) {
|
|
console.error("no fees found for exchange", exchange);
|
|
continue;
|
|
}
|
|
|
|
let wireFee: AmountJson|undefined = undefined;
|
|
for (let fee of (fees.feesForType[wireMethod] || [])) {
|
|
if (fee.startStamp >= wireFeeTime && fee.endStamp <= wireFeeTime) {
|
|
wireFee = fee.wireFee;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (wireFee) {
|
|
let amortizedWireFee = Amounts.divide(wireFee, wireFeeAmortization);
|
|
if (Amounts.cmp(wireFeeLimit, amortizedWireFee) < 0) {
|
|
paymentAmount = Amounts.add(amortizedWireFee, paymentAmount).amount;
|
|
}
|
|
}
|
|
|
|
let res = selectCoins(cds, paymentAmount, depositFeeLimit);
|
|
if (res) {
|
|
return {
|
|
exchangeUrl: exchange.baseUrl,
|
|
cds: res,
|
|
}
|
|
}
|
|
}
|
|
return undefined;
|
|
}
|
|
|
|
|
|
/**
|
|
* Record all information that is necessary to
|
|
* pay for a contract in the wallet's database.
|
|
*/
|
|
private async recordConfirmPay(offer: OfferRecord,
|
|
payCoinInfo: PayCoinInfo,
|
|
chosenExchange: string): Promise<void> {
|
|
let payReq: PayReq = {
|
|
coins: payCoinInfo.map((x) => x.sig),
|
|
merchant_pub: offer.contract.merchant_pub,
|
|
order_id: offer.contract.order_id,
|
|
exchange: chosenExchange,
|
|
};
|
|
let t: TransactionRecord = {
|
|
contractHash: offer.H_contract,
|
|
contract: offer.contract,
|
|
payReq: payReq,
|
|
merchantSig: offer.merchant_sig,
|
|
finished: false,
|
|
};
|
|
|
|
let historyEntry: HistoryRecord = {
|
|
type: "pay",
|
|
timestamp: (new Date).getTime(),
|
|
subjectId: `contract-${offer.H_contract}`,
|
|
detail: {
|
|
merchantName: offer.contract.merchant.name,
|
|
amount: offer.contract.amount,
|
|
contractHash: offer.H_contract,
|
|
fulfillmentUrl: offer.contract.fulfillment_url,
|
|
},
|
|
level: HistoryLevel.User
|
|
};
|
|
|
|
await this.q()
|
|
.put(Stores.transactions, t)
|
|
.put(Stores.history, historyEntry)
|
|
.putAll(Stores.coins, payCoinInfo.map((pci) => pci.updatedCoin))
|
|
.finish();
|
|
|
|
this.notifier.notify();
|
|
}
|
|
|
|
|
|
async putHistory(historyEntry: HistoryRecord): Promise<void> {
|
|
await this.q().put(Stores.history, historyEntry).finish();
|
|
this.notifier.notify();
|
|
}
|
|
|
|
|
|
async saveOffer(offer: OfferRecord): Promise<number> {
|
|
console.log(`saving offer in wallet.ts`);
|
|
let id = await this.q().putWithResult(Stores.offers, offer);
|
|
this.notifier.notify();
|
|
console.log(`saved offer with id ${id}`);
|
|
if (typeof id !== "number") {
|
|
throw Error("db schema wrong");
|
|
}
|
|
return id;
|
|
}
|
|
|
|
|
|
/**
|
|
* Add a contract to the wallet and sign coins,
|
|
* but do not send them yet.
|
|
*/
|
|
async confirmPay(offer: OfferRecord): Promise<any> {
|
|
console.log("executing confirmPay");
|
|
|
|
let transaction = await this.q().get(Stores.transactions, offer.H_contract);
|
|
|
|
if (transaction) {
|
|
// Already payed ...
|
|
return {};
|
|
}
|
|
|
|
let res = await this.getCoinsForPayment(offer.contract.amount,
|
|
offer.contract.wire_method,
|
|
getTalerStampSec(offer.contract.timestamp) || 0,
|
|
offer.contract.max_fee,
|
|
offer.contract.max_wire_fee || Amounts.getZero(offer.contract.amount.currency),
|
|
offer.contract.wire_fee_amortization || 1,
|
|
offer.contract.exchanges,
|
|
offer.contract.auditors);
|
|
|
|
console.log("max_fee", offer.contract.max_fee);
|
|
console.log("coin selection result", res);
|
|
|
|
if (!res) {
|
|
console.log("not confirming payment, insufficient coins");
|
|
return {
|
|
error: "coins-insufficient",
|
|
};
|
|
}
|
|
let {exchangeUrl, cds} = res;
|
|
|
|
let ds = await this.cryptoApi.signDeposit(offer, cds);
|
|
await this.recordConfirmPay(offer,
|
|
ds,
|
|
exchangeUrl);
|
|
return {};
|
|
}
|
|
|
|
|
|
/**
|
|
* Add a contract to the wallet and sign coins,
|
|
* but do not send them yet.
|
|
*/
|
|
async checkPay(offer: OfferRecord): Promise<any> {
|
|
// First check if we already payed for it.
|
|
let transaction = await this.q().get(Stores.transactions, offer.H_contract);
|
|
if (transaction) {
|
|
return {isPayed: true};
|
|
}
|
|
|
|
// If not already payed, check if we could pay for it.
|
|
let res = await this.getCoinsForPayment(offer.contract.amount,
|
|
offer.contract.wire_method,
|
|
getTalerStampSec(offer.contract.timestamp) || 0,
|
|
offer.contract.max_fee,
|
|
offer.contract.max_wire_fee || Amounts.getZero(offer.contract.amount.currency),
|
|
offer.contract.wire_fee_amortization || 1,
|
|
offer.contract.exchanges,
|
|
offer.contract.auditors);
|
|
|
|
if (!res) {
|
|
console.log("not confirming payment, insufficient coins");
|
|
return {
|
|
error: "coins-insufficient",
|
|
};
|
|
}
|
|
return {isPayed: false};
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrieve information required to pay for a contract, where the
|
|
* contract is identified via the fulfillment url.
|
|
*/
|
|
async queryPayment(url: string): Promise<any> {
|
|
console.log("query for payment", url);
|
|
|
|
const t = await this.q().getIndexed(Stores.transactions.fulfillmentUrlIndex, url);
|
|
|
|
if (!t) {
|
|
console.log("query for payment failed");
|
|
return {
|
|
success: false,
|
|
}
|
|
}
|
|
console.log("query for payment succeeded:", t);
|
|
let resp = {
|
|
success: true,
|
|
payReq: t.payReq,
|
|
H_contract: t.contractHash,
|
|
contract: t.contract,
|
|
};
|
|
return resp;
|
|
}
|
|
|
|
|
|
/**
|
|
* First fetch information requred to withdraw from the reserve,
|
|
* then deplete the reserve, withdrawing coins until it is empty.
|
|
*/
|
|
private async processReserve(reserveRecord: ReserveRecord,
|
|
retryDelayMs: number = 250): Promise<void> {
|
|
const opId = "reserve-" + reserveRecord.reserve_pub;
|
|
this.startOperation(opId);
|
|
|
|
try {
|
|
let exchange = await this.updateExchangeFromUrl(reserveRecord.exchange_base_url);
|
|
let reserve = await this.updateReserve(reserveRecord.reserve_pub);
|
|
let n = await this.depleteReserve(reserve);
|
|
|
|
if (n != 0) {
|
|
let depleted: HistoryRecord = {
|
|
type: "depleted-reserve",
|
|
subjectId: `reserve-progress-${reserveRecord.reserve_pub}`,
|
|
timestamp: (new Date).getTime(),
|
|
detail: {
|
|
exchangeBaseUrl: reserveRecord.exchange_base_url,
|
|
reservePub: reserveRecord.reserve_pub,
|
|
requestedAmount: reserveRecord.requested_amount,
|
|
currentAmount: reserveRecord.current_amount,
|
|
},
|
|
level: HistoryLevel.User
|
|
};
|
|
await this.q().put(Stores.history, depleted).finish();
|
|
}
|
|
} catch (e) {
|
|
// random, exponential backoff truncated at 3 minutes
|
|
let nextDelay = Math.min(2 * retryDelayMs + retryDelayMs * Math.random(),
|
|
3000 * 60);
|
|
console.warn(`Failed to deplete reserve, trying again in ${retryDelayMs} ms`);
|
|
setTimeout(() => this.processReserve(reserveRecord, nextDelay),
|
|
retryDelayMs);
|
|
} finally {
|
|
this.stopOperation(opId);
|
|
}
|
|
}
|
|
|
|
|
|
private async processPreCoin(preCoin: PreCoinRecord,
|
|
retryDelayMs = 200): Promise<void> {
|
|
if (this.processPreCoinConcurrent >= 4 || this.processPreCoinThrottle[preCoin.exchangeBaseUrl]) {
|
|
console.log("delaying processPreCoin");
|
|
setTimeout(() => this.processPreCoin(preCoin, Math.min(retryDelayMs * 2, 5 * 60 * 1000)),
|
|
retryDelayMs);
|
|
return;
|
|
}
|
|
console.log("executing processPreCoin");
|
|
this.processPreCoinConcurrent++;
|
|
try {
|
|
const exchange = await this.q().get(Stores.exchanges,
|
|
preCoin.exchangeBaseUrl);
|
|
if (!exchange) {
|
|
console.error("db inconsistend: exchange for precoin not found");
|
|
return;
|
|
}
|
|
const denom = await this.q().get(Stores.denominations,
|
|
[preCoin.exchangeBaseUrl, preCoin.denomPub]);
|
|
if (!denom) {
|
|
console.error("db inconsistent: denom for precoin not found");
|
|
return;
|
|
}
|
|
|
|
const coin = await this.withdrawExecute(preCoin);
|
|
|
|
const mutateReserve = (r: ReserveRecord) => {
|
|
|
|
console.log(`before committing coin: current ${amountToPretty(r.current_amount!)}, precoin: ${amountToPretty(
|
|
r.precoin_amount)})}`);
|
|
|
|
let x = Amounts.sub(r.precoin_amount,
|
|
preCoin.coinValue,
|
|
denom.feeWithdraw);
|
|
if (x.saturated) {
|
|
console.error("database inconsistent");
|
|
throw AbortTransaction;
|
|
}
|
|
r.precoin_amount = x.amount;
|
|
return r;
|
|
};
|
|
|
|
const historyEntry: HistoryRecord = {
|
|
type: "withdraw",
|
|
timestamp: (new Date).getTime(),
|
|
level: HistoryLevel.Expert,
|
|
detail: {
|
|
coinPub: coin.coinPub,
|
|
}
|
|
};
|
|
|
|
await this.q()
|
|
.mutate(Stores.reserves, preCoin.reservePub, mutateReserve)
|
|
.delete("precoins", coin.coinPub)
|
|
.add(Stores.coins, coin)
|
|
.add(Stores.history, historyEntry)
|
|
.finish();
|
|
|
|
this.notifier.notify();
|
|
} catch (e) {
|
|
console.error("Failed to withdraw coin from precoin, retrying in",
|
|
retryDelayMs,
|
|
"ms", e);
|
|
// exponential backoff truncated at one minute
|
|
let nextRetryDelayMs = Math.min(retryDelayMs * 2, 5 * 60 * 1000);
|
|
setTimeout(() => this.processPreCoin(preCoin, nextRetryDelayMs),
|
|
retryDelayMs);
|
|
this.processPreCoinThrottle[preCoin.exchangeBaseUrl] = (this.processPreCoinThrottle[preCoin.exchangeBaseUrl] || 0) + 1;
|
|
setTimeout(() => {this.processPreCoinThrottle[preCoin.exchangeBaseUrl]--; }, retryDelayMs);
|
|
} finally {
|
|
this.processPreCoinConcurrent--;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a reserve, but do not flag it as confirmed yet.
|
|
*
|
|
* Adds the corresponding exchange as a trusted exchange if it is neither
|
|
* audited nor trusted already.
|
|
*/
|
|
async createReserve(req: CreateReserveRequest): Promise<CreateReserveResponse> {
|
|
let keypair = await this.cryptoApi.createEddsaKeypair();
|
|
const now = (new Date).getTime();
|
|
const canonExchange = canonicalizeBaseUrl(req.exchange);
|
|
|
|
const reserveRecord: ReserveRecord = {
|
|
hasPayback: false,
|
|
reserve_pub: keypair.pub,
|
|
reserve_priv: keypair.priv,
|
|
exchange_base_url: canonExchange,
|
|
created: now,
|
|
last_query: null,
|
|
current_amount: null,
|
|
requested_amount: req.amount,
|
|
confirmed: false,
|
|
precoin_amount: Amounts.getZero(req.amount.currency),
|
|
};
|
|
|
|
const historyEntry = {
|
|
type: "create-reserve",
|
|
level: HistoryLevel.Expert,
|
|
timestamp: now,
|
|
subjectId: `reserve-progress-${reserveRecord.reserve_pub}`,
|
|
detail: {
|
|
requestedAmount: req.amount,
|
|
reservePub: reserveRecord.reserve_pub,
|
|
}
|
|
};
|
|
|
|
let exchangeInfo = await this.updateExchangeFromUrl(req.exchange);
|
|
let {isAudited, isTrusted} = await this.getExchangeTrust(exchangeInfo);
|
|
let currencyRecord = await this.q().get(Stores.currencies, exchangeInfo.currency);
|
|
if (!currencyRecord) {
|
|
currencyRecord = {
|
|
name: exchangeInfo.currency,
|
|
fractionalDigits: 2,
|
|
exchanges: [],
|
|
auditors: [],
|
|
}
|
|
}
|
|
|
|
if (!isAudited && !isTrusted) {
|
|
currencyRecord.exchanges.push({baseUrl: req.exchange, priority: 0});
|
|
}
|
|
|
|
await this.q()
|
|
.put(Stores.currencies, currencyRecord)
|
|
.put(Stores.reserves, reserveRecord)
|
|
.put(Stores.history, historyEntry)
|
|
.finish();
|
|
|
|
let r: CreateReserveResponse = {
|
|
exchange: canonExchange,
|
|
reservePub: keypair.pub,
|
|
};
|
|
return r;
|
|
}
|
|
|
|
|
|
/**
|
|
* Mark an existing reserve as confirmed. The wallet will start trying
|
|
* to withdraw from that reserve. This may not immediately succeed,
|
|
* since the exchange might not know about the reserve yet, even though the
|
|
* bank confirmed its creation.
|
|
*
|
|
* A confirmed reserve should be shown to the user in the UI, while
|
|
* an unconfirmed reserve should be hidden.
|
|
*/
|
|
async confirmReserve(req: ConfirmReserveRequest): Promise<void> {
|
|
const now = (new Date).getTime();
|
|
let reserve: ReserveRecord|undefined = await (
|
|
this.q().get<ReserveRecord>(Stores.reserves,
|
|
req.reservePub));
|
|
if (!reserve) {
|
|
console.error("Unable to confirm reserve, not found in DB");
|
|
return;
|
|
}
|
|
console.log("reserve confirmed");
|
|
const historyEntry: HistoryRecord = {
|
|
type: "confirm-reserve",
|
|
timestamp: now,
|
|
subjectId: `reserve-progress-${reserve.reserve_pub}`,
|
|
detail: {
|
|
exchangeBaseUrl: reserve.exchange_base_url,
|
|
reservePub: req.reservePub,
|
|
requestedAmount: reserve.requested_amount,
|
|
},
|
|
level: HistoryLevel.User,
|
|
};
|
|
reserve.confirmed = true;
|
|
await this.q()
|
|
.put(Stores.reserves, reserve)
|
|
.put(Stores.history, historyEntry)
|
|
.finish();
|
|
this.notifier.notify();
|
|
|
|
this.processReserve(reserve);
|
|
}
|
|
|
|
|
|
private async withdrawExecute(pc: PreCoinRecord): Promise<CoinRecord> {
|
|
let reserve = await this.q().get<ReserveRecord>(Stores.reserves,
|
|
pc.reservePub);
|
|
|
|
if (!reserve) {
|
|
throw Error("db inconsistent");
|
|
}
|
|
|
|
let wd: any = {};
|
|
wd.denom_pub = pc.denomPub;
|
|
wd.reserve_pub = pc.reservePub;
|
|
wd.reserve_sig = pc.withdrawSig;
|
|
wd.coin_ev = pc.coinEv;
|
|
let reqUrl = (new URI("reserve/withdraw")).absoluteTo(reserve.exchange_base_url);
|
|
let resp = await this.http.postJson(reqUrl.href(), wd);
|
|
|
|
if (resp.status != 200) {
|
|
throw new RequestException({
|
|
hint: "Withdrawal failed",
|
|
status: resp.status
|
|
});
|
|
}
|
|
let r = JSON.parse(resp.responseText);
|
|
let denomSig = await this.cryptoApi.rsaUnblind(r.ev_sig,
|
|
pc.blindingKey,
|
|
pc.denomPub);
|
|
let coin: CoinRecord = {
|
|
reservePub: pc.reservePub,
|
|
coinPub: pc.coinPub,
|
|
coinPriv: pc.coinPriv,
|
|
denomPub: pc.denomPub,
|
|
denomSig: denomSig,
|
|
blindingKey: pc.blindingKey,
|
|
currentAmount: pc.coinValue,
|
|
exchangeBaseUrl: pc.exchangeBaseUrl,
|
|
status: CoinStatus.Fresh,
|
|
};
|
|
return coin;
|
|
}
|
|
|
|
|
|
/**
|
|
* Withdraw coins from a reserve until it is empty.
|
|
*/
|
|
private async depleteReserve(reserve: ReserveRecord): Promise<number> {
|
|
console.log("depleting reserve");
|
|
if (!reserve.current_amount) {
|
|
throw Error("can't withdraw when amount is unknown");
|
|
}
|
|
let currentAmount = reserve.current_amount;
|
|
if (!currentAmount) {
|
|
throw Error("can't withdraw when amount is unknown");
|
|
}
|
|
let denomsForWithdraw = await this.getVerifiedWithdrawDenomList(reserve.exchange_base_url,
|
|
currentAmount);
|
|
|
|
console.log(`withdrawing ${denomsForWithdraw.length} coins`);
|
|
|
|
let ps = denomsForWithdraw.map(async(denom) => {
|
|
function mutateReserve(r: ReserveRecord): ReserveRecord {
|
|
let currentAmount = r.current_amount;
|
|
if (!currentAmount) {
|
|
throw Error("can't withdraw when amount is unknown");
|
|
}
|
|
r.precoin_amount = Amounts.add(r.precoin_amount,
|
|
denom.value,
|
|
denom.feeWithdraw).amount;
|
|
let result = Amounts.sub(currentAmount,
|
|
denom.value,
|
|
denom.feeWithdraw);
|
|
if (result.saturated) {
|
|
console.error("can't create precoin, saturated");
|
|
throw AbortTransaction;
|
|
}
|
|
r.current_amount = result.amount;
|
|
|
|
console.log(`after creating precoin: current ${amountToPretty(r.current_amount)}, precoin: ${amountToPretty(
|
|
r.precoin_amount)})}`);
|
|
|
|
return r;
|
|
}
|
|
|
|
let preCoin = await this.cryptoApi
|
|
.createPreCoin(denom, reserve);
|
|
await this.q()
|
|
.put(Stores.precoins, preCoin)
|
|
.mutate(Stores.reserves, reserve.reserve_pub, mutateReserve);
|
|
await this.processPreCoin(preCoin);
|
|
});
|
|
|
|
await Promise.all(ps);
|
|
return ps.length;
|
|
}
|
|
|
|
|
|
/**
|
|
* Update the information about a reserve that is stored in the wallet
|
|
* by quering the reserve's exchange.
|
|
*/
|
|
private async updateReserve(reservePub: string): Promise<ReserveRecord> {
|
|
let reserve = await this.q()
|
|
.get<ReserveRecord>(Stores.reserves, reservePub);
|
|
if (!reserve) {
|
|
throw Error("reserve not in db");
|
|
}
|
|
let reqUrl = new URI("reserve/status").absoluteTo(reserve.exchange_base_url);
|
|
reqUrl.query({'reserve_pub': reservePub});
|
|
let resp = await this.http.get(reqUrl.href());
|
|
if (resp.status != 200) {
|
|
throw Error();
|
|
}
|
|
let reserveInfo = JSON.parse(resp.responseText);
|
|
if (!reserveInfo) {
|
|
throw Error();
|
|
}
|
|
let oldAmount = reserve.current_amount;
|
|
let newAmount = reserveInfo.balance;
|
|
reserve.current_amount = reserveInfo.balance;
|
|
let historyEntry = {
|
|
type: "reserve-update",
|
|
timestamp: (new Date).getTime(),
|
|
subjectId: `reserve-progress-${reserve.reserve_pub}`,
|
|
detail: {
|
|
reservePub,
|
|
requestedAmount: reserve.requested_amount,
|
|
oldAmount,
|
|
newAmount
|
|
}
|
|
};
|
|
await this.q()
|
|
.put(Stores.reserves, reserve)
|
|
.finish();
|
|
this.notifier.notify();
|
|
return reserve;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get the wire information for the exchange with the given base URL.
|
|
*/
|
|
async getWireInfo(exchangeBaseUrl: string): Promise<WireInfo> {
|
|
exchangeBaseUrl = canonicalizeBaseUrl(exchangeBaseUrl);
|
|
let reqUrl = new URI("wire").absoluteTo(exchangeBaseUrl);
|
|
let resp = await this.http.get(reqUrl.href());
|
|
|
|
if (resp.status != 200) {
|
|
throw Error("/wire request failed");
|
|
}
|
|
|
|
let wiJson = JSON.parse(resp.responseText);
|
|
if (!wiJson) {
|
|
throw Error("/wire response malformed")
|
|
}
|
|
return wiJson;
|
|
}
|
|
|
|
async getPossibleDenoms(exchangeBaseUrl: string) {
|
|
return (
|
|
this.q().iterIndex(Stores.denominations.exchangeBaseUrlIndex,
|
|
exchangeBaseUrl)
|
|
.filter((d) => d.status == DenominationStatus.Unverified || d.status == DenominationStatus.VerifiedGood)
|
|
.toArray()
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Get a list of denominations to withdraw from the given exchange for the
|
|
* given amount, making sure that all denominations' signatures are verified.
|
|
*
|
|
* Writes to the DB in order to record the result from verifying
|
|
* denominations.
|
|
*/
|
|
async getVerifiedWithdrawDenomList(exchangeBaseUrl: string,
|
|
amount: AmountJson): Promise<DenominationRecord[]> {
|
|
const exchange = await this.q().get(Stores.exchanges, exchangeBaseUrl);
|
|
if (!exchange) {
|
|
throw Error(`exchange ${exchangeBaseUrl} not found`);
|
|
}
|
|
|
|
const possibleDenoms = await (
|
|
this.q().iterIndex(Stores.denominations.exchangeBaseUrlIndex,
|
|
exchange.baseUrl)
|
|
.filter((d) => d.status == DenominationStatus.Unverified || d.status == DenominationStatus.VerifiedGood)
|
|
.toArray()
|
|
);
|
|
|
|
let allValid = false;
|
|
let currentPossibleDenoms = possibleDenoms;
|
|
|
|
let selectedDenoms: DenominationRecord[];
|
|
|
|
do {
|
|
allValid = true;
|
|
let nextPossibleDenoms = [];
|
|
selectedDenoms = getWithdrawDenomList(amount, possibleDenoms);
|
|
for (let denom of selectedDenoms || []) {
|
|
if (denom.status == DenominationStatus.Unverified) {
|
|
console.log(`verifying denom ${denom.denomPub.substr(0, 15)}`);
|
|
let valid = await this.cryptoApi.isValidDenom(denom,
|
|
exchange.masterPublicKey);
|
|
if (!valid) {
|
|
denom.status = DenominationStatus.VerifiedBad;
|
|
allValid = false;
|
|
} else {
|
|
denom.status = DenominationStatus.VerifiedGood;
|
|
nextPossibleDenoms.push(denom);
|
|
}
|
|
await this.q().put(Stores.denominations, denom).finish();
|
|
} else {
|
|
nextPossibleDenoms.push(denom);
|
|
}
|
|
}
|
|
currentPossibleDenoms = nextPossibleDenoms;
|
|
} while (selectedDenoms.length > 0 && !allValid);
|
|
|
|
return selectedDenoms;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Check if and how an exchange is trusted and/or audited.
|
|
*/
|
|
async getExchangeTrust(exchangeInfo: ExchangeRecord): Promise<{isTrusted: boolean, isAudited: boolean}> {
|
|
let isTrusted = false;
|
|
let isAudited = false;
|
|
let currencyRecord = await this.q().get(Stores.currencies, exchangeInfo.currency);
|
|
if (currencyRecord) {
|
|
for (let trustedExchange of currencyRecord.exchanges) {
|
|
if (trustedExchange.baseUrl == exchangeInfo.baseUrl) {
|
|
isTrusted = true;
|
|
break;
|
|
}
|
|
}
|
|
for (let trustedAuditor of currencyRecord.auditors) {
|
|
for (let exchangeAuditor of exchangeInfo.auditors) {
|
|
if (trustedAuditor.baseUrl == exchangeAuditor.url) {
|
|
isAudited = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return {isTrusted, isAudited};
|
|
}
|
|
|
|
async getReserveCreationInfo(baseUrl: string,
|
|
amount: AmountJson): Promise<ReserveCreationInfo> {
|
|
let exchangeInfo = await this.updateExchangeFromUrl(baseUrl);
|
|
|
|
let selectedDenoms = await this.getVerifiedWithdrawDenomList(baseUrl,
|
|
amount);
|
|
let acc = Amounts.getZero(amount.currency);
|
|
for (let d of selectedDenoms) {
|
|
acc = Amounts.add(acc, d.feeWithdraw).amount;
|
|
}
|
|
let actualCoinCost = selectedDenoms
|
|
.map((d: DenominationRecord) => Amounts.add(d.value,
|
|
d.feeWithdraw).amount)
|
|
.reduce((a, b) => Amounts.add(a, b).amount);
|
|
|
|
let wireInfo = await this.getWireInfo(baseUrl);
|
|
|
|
let wireFees = await this.q().get(Stores.exchangeWireFees, baseUrl);
|
|
if (!wireFees) {
|
|
// should never happen unless DB is inconsistent
|
|
throw Error(`no wire fees found for exchange ${baseUrl}`);
|
|
}
|
|
|
|
let {isTrusted, isAudited} = await this.getExchangeTrust(exchangeInfo);
|
|
|
|
let earliestDepositExpiration = Infinity;;
|
|
for (let denom of selectedDenoms) {
|
|
let expireDeposit = getTalerStampSec(denom.stampExpireDeposit)!;
|
|
if (expireDeposit < earliestDepositExpiration) {
|
|
earliestDepositExpiration = expireDeposit;
|
|
}
|
|
}
|
|
|
|
let ret: ReserveCreationInfo = {
|
|
exchangeInfo,
|
|
selectedDenoms,
|
|
wireInfo,
|
|
wireFees,
|
|
isAudited,
|
|
isTrusted,
|
|
withdrawFee: acc,
|
|
earliestDepositExpiration,
|
|
overhead: Amounts.sub(amount, actualCoinCost).amount,
|
|
};
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* Update or add exchange DB entry by fetching the /keys information.
|
|
* Optionally link the reserve entry to the new or existing
|
|
* exchange entry in then DB.
|
|
*/
|
|
async updateExchangeFromUrl(baseUrl: string): Promise<ExchangeRecord> {
|
|
baseUrl = canonicalizeBaseUrl(baseUrl);
|
|
let keysUrl = new URI("keys").absoluteTo(baseUrl);
|
|
let wireUrl = new URI("wire").absoluteTo(baseUrl);
|
|
let keysResp = await this.http.get(keysUrl.href());
|
|
if (keysResp.status != 200) {
|
|
throw Error("/keys request failed");
|
|
}
|
|
let wireResp = await this.http.get(wireUrl.href());
|
|
if (wireResp.status != 200) {
|
|
throw Error("/wire request failed");
|
|
}
|
|
let exchangeKeysJson = KeysJson.checked(JSON.parse(keysResp.responseText));
|
|
let wireRespJson = JSON.parse(wireResp.responseText);
|
|
if (typeof wireRespJson !== "object") {
|
|
throw Error("/wire response is not an object");
|
|
}
|
|
console.log("exchange wire", wireRespJson);
|
|
let wireMethodDetails: WireDetailJson[] = [];
|
|
for (let methodName in wireRespJson) {
|
|
wireMethodDetails.push(WireDetailJson.checked(wireRespJson[methodName]));
|
|
}
|
|
return this.updateExchangeFromJson(baseUrl, exchangeKeysJson, wireMethodDetails);
|
|
}
|
|
|
|
|
|
private async suspendCoins(exchangeInfo: ExchangeRecord): Promise<void> {
|
|
let suspendedCoins = await (
|
|
this.q()
|
|
.iterIndex(Stores.coins.exchangeBaseUrlIndex, exchangeInfo.baseUrl)
|
|
.indexJoinLeft(Stores.denominations.exchangeBaseUrlIndex,
|
|
(e) => e.exchangeBaseUrl)
|
|
.reduce((cd: JoinLeftResult<CoinRecord,DenominationRecord>,
|
|
suspendedCoins: CoinRecord[]) => {
|
|
if ((!cd.right) || (!cd.right.isOffered)) {
|
|
return Array.prototype.concat(suspendedCoins, [cd.left]);
|
|
}
|
|
return Array.prototype.concat(suspendedCoins);
|
|
}, []));
|
|
|
|
let q = this.q();
|
|
suspendedCoins.map((c) => {
|
|
console.log("suspending coin", c);
|
|
c.suspended = true;
|
|
q.put(Stores.coins, c);
|
|
});
|
|
await q.finish();
|
|
}
|
|
|
|
|
|
private async updateExchangeFromJson(baseUrl: string,
|
|
exchangeKeysJson: KeysJson,
|
|
wireMethodDetails: WireDetailJson[]): Promise<ExchangeRecord> {
|
|
|
|
// FIXME: all this should probably be commited atomically
|
|
const updateTimeSec = getTalerStampSec(exchangeKeysJson.list_issue_date);
|
|
if (updateTimeSec === null) {
|
|
throw Error("invalid update time");
|
|
}
|
|
|
|
if (exchangeKeysJson.denoms.length == 0) {
|
|
throw Error("exchange doesn't offer any denominations");
|
|
}
|
|
|
|
const r = await this.q().get<ExchangeRecord>(Stores.exchanges, baseUrl);
|
|
|
|
let exchangeInfo: ExchangeRecord;
|
|
|
|
if (!r) {
|
|
exchangeInfo = {
|
|
baseUrl,
|
|
lastUpdateTime: updateTimeSec,
|
|
masterPublicKey: exchangeKeysJson.master_public_key,
|
|
auditors: exchangeKeysJson.auditors,
|
|
currency: exchangeKeysJson.denoms[0].value.currency,
|
|
};
|
|
console.log("making fresh exchange");
|
|
} else {
|
|
if (updateTimeSec < r.lastUpdateTime) {
|
|
console.log("outdated /keys, not updating");
|
|
return r
|
|
}
|
|
exchangeInfo = r;
|
|
exchangeInfo.lastUpdateTime = updateTimeSec;
|
|
console.log("updating old exchange");
|
|
}
|
|
|
|
let updatedExchangeInfo = await this.updateExchangeInfo(exchangeInfo,
|
|
exchangeKeysJson);
|
|
await this.suspendCoins(updatedExchangeInfo);
|
|
|
|
await this.q()
|
|
.put(Stores.exchanges, updatedExchangeInfo)
|
|
.finish();
|
|
|
|
let oldWireFees = await this.q().get(Stores.exchangeWireFees, baseUrl);
|
|
if (!oldWireFees) {
|
|
oldWireFees = {
|
|
exchangeBaseUrl: baseUrl,
|
|
feesForType: {},
|
|
};
|
|
}
|
|
|
|
for (let detail of wireMethodDetails) {
|
|
let latestFeeStamp = 0;
|
|
let fees = oldWireFees.feesForType[detail.type] || [];
|
|
oldWireFees.feesForType[detail.type] = fees;
|
|
for (let oldFee of fees) {
|
|
if (oldFee.endStamp > latestFeeStamp) {
|
|
latestFeeStamp = oldFee.endStamp;
|
|
}
|
|
}
|
|
for (let fee of detail.fees) {
|
|
let start = getTalerStampSec(fee.start_date);
|
|
if (start == null) {
|
|
console.error("invalid start stamp in fee", fee);
|
|
continue;
|
|
}
|
|
if (start < latestFeeStamp) {
|
|
continue;
|
|
}
|
|
let end = getTalerStampSec(fee.end_date);
|
|
if (end == null) {
|
|
console.error("invalid end stamp in fee", fee);
|
|
continue;
|
|
}
|
|
let wf: WireFee = {
|
|
wireFee: fee.wire_fee,
|
|
closingFee: fee.closing_fee,
|
|
sig: fee.sig,
|
|
startStamp: start,
|
|
endStamp: end,
|
|
}
|
|
let valid: boolean = await this.cryptoApi.isValidWireFee(detail.type, wf, exchangeInfo.masterPublicKey);
|
|
if (!valid) {
|
|
console.error("fee signature invalid", fee);
|
|
throw Error("fee signature invalid");
|
|
}
|
|
fees.push(wf);
|
|
}
|
|
}
|
|
|
|
await this.q().put(Stores.exchangeWireFees, oldWireFees);
|
|
|
|
if (exchangeKeysJson.payback) {
|
|
for (let payback of exchangeKeysJson.payback) {
|
|
let denom = await this.q().getIndexed(Stores.denominations.denomPubHashIndex, payback.h_denom_pub);
|
|
if (!denom) {
|
|
continue;
|
|
}
|
|
console.log(`cashing back denom`, denom);
|
|
let coins = await this.q().iterIndex(Stores.coins.denomPubIndex, denom.denomPub).toArray();
|
|
for (let coin of coins) {
|
|
this.payback(coin.coinPub);
|
|
}
|
|
}
|
|
}
|
|
|
|
return updatedExchangeInfo;
|
|
}
|
|
|
|
|
|
private async updateExchangeInfo(exchangeInfo: ExchangeRecord,
|
|
newKeys: KeysJson): Promise<ExchangeRecord> {
|
|
if (exchangeInfo.masterPublicKey != newKeys.master_public_key) {
|
|
throw Error("public keys do not match");
|
|
}
|
|
|
|
const existingDenoms: {[denomPub: string]: DenominationRecord} = await (
|
|
this.q().iterIndex(Stores.denominations.exchangeBaseUrlIndex,
|
|
exchangeInfo.baseUrl)
|
|
.reduce((x: DenominationRecord,
|
|
acc: typeof existingDenoms) => (acc[x.denomPub] = x, acc),
|
|
{})
|
|
);
|
|
|
|
const newDenoms: typeof existingDenoms = {};
|
|
const newAndUnseenDenoms: typeof existingDenoms = {};
|
|
|
|
for (let d of newKeys.denoms) {
|
|
let dr = await this.denominationRecordFromKeys(exchangeInfo.baseUrl, d);
|
|
if (!(d.denom_pub in existingDenoms)) {
|
|
newAndUnseenDenoms[dr.denomPub] = dr;
|
|
}
|
|
newDenoms[dr.denomPub] = dr;
|
|
}
|
|
|
|
for (let oldDenomPub in existingDenoms) {
|
|
if (!(oldDenomPub in newDenoms)) {
|
|
let d = existingDenoms[oldDenomPub];
|
|
d.isOffered = false;
|
|
}
|
|
}
|
|
|
|
await this.q()
|
|
.putAll(Stores.denominations,
|
|
Object.keys(newAndUnseenDenoms).map((d) => newAndUnseenDenoms[d]))
|
|
.putAll(Stores.denominations,
|
|
Object.keys(existingDenoms).map((d) => existingDenoms[d]))
|
|
.finish();
|
|
return exchangeInfo;
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrieve a mapping from currency name to the amount
|
|
* that is currenctly available for spending in the wallet.
|
|
*/
|
|
async getBalances(): Promise<WalletBalance> {
|
|
function ensureEntry(balance: WalletBalance, currency: string) {
|
|
let entry: WalletBalanceEntry|undefined = balance[currency];
|
|
let z = Amounts.getZero(currency);
|
|
if (!entry) {
|
|
balance[currency] = entry = {
|
|
available: z,
|
|
pendingIncoming: z,
|
|
pendingPayment: z,
|
|
paybackAmount: z,
|
|
};
|
|
}
|
|
return entry;
|
|
}
|
|
|
|
function collectBalances(c: CoinRecord, balance: WalletBalance) {
|
|
if (c.suspended) {
|
|
return balance;
|
|
}
|
|
if (!(c.status == CoinStatus.Dirty || c.status == CoinStatus.Fresh)) {
|
|
return balance;
|
|
}
|
|
let currency = c.currentAmount.currency;
|
|
let entry = ensureEntry(balance, currency);
|
|
entry.available = Amounts.add(entry.available, c.currentAmount).amount;
|
|
return balance;
|
|
}
|
|
|
|
function collectPendingWithdraw(r: ReserveRecord, balance: WalletBalance) {
|
|
if (!r.confirmed) {
|
|
return balance;
|
|
}
|
|
let entry = ensureEntry(balance, r.requested_amount.currency);
|
|
let amount = r.current_amount;
|
|
if (!amount) {
|
|
amount = r.requested_amount;
|
|
}
|
|
amount = Amounts.add(amount, r.precoin_amount).amount;
|
|
if (Amounts.cmp(smallestWithdraw[r.exchange_base_url], amount) < 0) {
|
|
entry.pendingIncoming = Amounts.add(entry.pendingIncoming,
|
|
amount).amount;
|
|
}
|
|
return balance;
|
|
}
|
|
|
|
function collectPaybacks(r: ReserveRecord, balance: WalletBalance) {
|
|
if (!r.hasPayback) {
|
|
return balance;
|
|
}
|
|
let entry = ensureEntry(balance, r.requested_amount.currency);
|
|
if (Amounts.cmp(smallestWithdraw[r.exchange_base_url], r.current_amount!) < 0) {
|
|
entry.paybackAmount = Amounts.add(entry.paybackAmount, r.current_amount!).amount;
|
|
}
|
|
return balance;
|
|
}
|
|
|
|
function collectPendingRefresh(r: RefreshSessionRecord,
|
|
balance: WalletBalance) {
|
|
// Don't count finished refreshes, since the refresh already resulted
|
|
// in coins being added to the wallet.
|
|
if (r.finished) {
|
|
return balance;
|
|
}
|
|
let entry = ensureEntry(balance, r.valueWithFee.currency);
|
|
entry.pendingIncoming = Amounts.add(entry.pendingIncoming,
|
|
r.valueOutput).amount;
|
|
|
|
return balance;
|
|
}
|
|
|
|
function collectPayments(t: TransactionRecord, balance: WalletBalance) {
|
|
if (t.finished) {
|
|
return balance;
|
|
}
|
|
let entry = ensureEntry(balance, t.contract.amount.currency);
|
|
entry.pendingPayment = Amounts.add(entry.pendingPayment,
|
|
t.contract.amount).amount;
|
|
|
|
return balance;
|
|
}
|
|
|
|
function collectSmallestWithdraw(e: JoinResult<ExchangeRecord, DenominationRecord>,
|
|
sw: any) {
|
|
let min = sw[e.left.baseUrl];
|
|
let v = Amounts.add(e.right.value, e.right.feeWithdraw).amount;
|
|
if (!min) {
|
|
min = v;
|
|
} else if (Amounts.cmp(v, min) < 0) {
|
|
min = v;
|
|
}
|
|
sw[e.left.baseUrl] = min;
|
|
return sw;
|
|
}
|
|
|
|
let balance = {};
|
|
// Mapping from exchange pub to smallest
|
|
// possible amount we can withdraw
|
|
let smallestWithdraw: {[baseUrl: string]: AmountJson} = {};
|
|
|
|
smallestWithdraw = await (this.q()
|
|
.iter(Stores.exchanges)
|
|
.indexJoin(Stores.denominations.exchangeBaseUrlIndex,
|
|
(x) => x.baseUrl)
|
|
.reduce(collectSmallestWithdraw, {}));
|
|
|
|
let tx = this.q();
|
|
tx.iter(Stores.coins)
|
|
.reduce(collectBalances, balance);
|
|
tx.iter(Stores.refresh)
|
|
.reduce(collectPendingRefresh, balance);
|
|
tx.iter(Stores.reserves)
|
|
.reduce(collectPendingWithdraw, balance);
|
|
tx.iter(Stores.reserves)
|
|
.reduce(collectPaybacks, balance);
|
|
tx.iter(Stores.transactions)
|
|
.reduce(collectPayments, balance);
|
|
await tx.finish();
|
|
return balance;
|
|
|
|
}
|
|
|
|
|
|
async createRefreshSession(oldCoinPub: string): Promise<RefreshSessionRecord|undefined> {
|
|
let coin = await this.q().get<CoinRecord>(Stores.coins, oldCoinPub);
|
|
|
|
if (!coin) {
|
|
throw Error("coin not found");
|
|
}
|
|
|
|
if (coin.currentAmount.value == 0 && coin.currentAmount.fraction == 0) {
|
|
return undefined;
|
|
}
|
|
|
|
let exchange = await this.updateExchangeFromUrl(coin.exchangeBaseUrl);
|
|
|
|
if (!exchange) {
|
|
throw Error("db inconsistent");
|
|
}
|
|
|
|
let oldDenom = await this.q().get(Stores.denominations,
|
|
[exchange.baseUrl, coin.denomPub]);
|
|
|
|
if (!oldDenom) {
|
|
throw Error("db inconsistent");
|
|
}
|
|
|
|
let availableDenoms: DenominationRecord[] = await (
|
|
this.q()
|
|
.iterIndex(Stores.denominations.exchangeBaseUrlIndex,
|
|
exchange.baseUrl)
|
|
.toArray()
|
|
);
|
|
|
|
let availableAmount = Amounts.sub(coin.currentAmount,
|
|
oldDenom.feeRefresh).amount;
|
|
|
|
let newCoinDenoms = getWithdrawDenomList(availableAmount,
|
|
availableDenoms);
|
|
|
|
console.log("refreshing coin", coin);
|
|
console.log("refreshing into", newCoinDenoms);
|
|
|
|
if (newCoinDenoms.length == 0) {
|
|
console.log(`not refreshing, available amount ${amountToPretty(availableAmount)} too small`);
|
|
return undefined;
|
|
}
|
|
|
|
|
|
let refreshSession: RefreshSessionRecord = await (
|
|
this.cryptoApi.createRefreshSession(exchange.baseUrl,
|
|
3,
|
|
coin,
|
|
newCoinDenoms,
|
|
oldDenom.feeRefresh));
|
|
|
|
function mutateCoin(c: CoinRecord): CoinRecord {
|
|
let r = Amounts.sub(c.currentAmount,
|
|
refreshSession.valueWithFee);
|
|
if (r.saturated) {
|
|
// Something else must have written the coin value
|
|
throw AbortTransaction;
|
|
}
|
|
c.currentAmount = r.amount;
|
|
c.status = CoinStatus.Refreshed;
|
|
return c;
|
|
}
|
|
|
|
// Store refresh session and subtract refreshed amount from
|
|
// coin in the same transaction.
|
|
await this.q()
|
|
.put(Stores.refresh, refreshSession)
|
|
.mutate(Stores.coins, coin.coinPub, mutateCoin)
|
|
.finish();
|
|
|
|
return refreshSession;
|
|
}
|
|
|
|
|
|
async refresh(oldCoinPub: string): Promise<void> {
|
|
let refreshSession: RefreshSessionRecord|undefined;
|
|
let oldSession = await this.q().get(Stores.refresh, oldCoinPub);
|
|
if (oldSession) {
|
|
console.log("got old session for", oldCoinPub);
|
|
console.log(oldSession);
|
|
refreshSession = oldSession;
|
|
} else {
|
|
refreshSession = await this.createRefreshSession(oldCoinPub);
|
|
}
|
|
if (!refreshSession) {
|
|
// refreshing not necessary
|
|
console.log("not refreshing", oldCoinPub);
|
|
return;
|
|
}
|
|
this.continueRefreshSession(refreshSession);
|
|
}
|
|
|
|
async continueRefreshSession(refreshSession: RefreshSessionRecord) {
|
|
if (refreshSession.finished) {
|
|
return;
|
|
}
|
|
if (typeof refreshSession.norevealIndex !== "number") {
|
|
let coinPub = refreshSession.meltCoinPub;
|
|
await this.refreshMelt(refreshSession);
|
|
let r = await this.q().get<RefreshSessionRecord>(Stores.refresh, coinPub);
|
|
if (!r) {
|
|
throw Error("refresh session does not exist anymore");
|
|
}
|
|
refreshSession = r;
|
|
}
|
|
|
|
await this.refreshReveal(refreshSession);
|
|
}
|
|
|
|
|
|
async refreshMelt(refreshSession: RefreshSessionRecord): Promise<void> {
|
|
if (refreshSession.norevealIndex != undefined) {
|
|
console.error("won't melt again");
|
|
return;
|
|
}
|
|
|
|
let coin = await this.q().get<CoinRecord>(Stores.coins,
|
|
refreshSession.meltCoinPub);
|
|
if (!coin) {
|
|
console.error("can't melt coin, it does not exist");
|
|
return;
|
|
}
|
|
|
|
let reqUrl = new URI("refresh/melt").absoluteTo(refreshSession.exchangeBaseUrl);
|
|
let meltCoin = {
|
|
coin_pub: coin.coinPub,
|
|
denom_pub: coin.denomPub,
|
|
denom_sig: coin.denomSig,
|
|
confirm_sig: refreshSession.confirmSig,
|
|
value_with_fee: refreshSession.valueWithFee,
|
|
};
|
|
let coinEvs = refreshSession.preCoinsForGammas.map((x) => x.map((y) => y.coinEv));
|
|
let req = {
|
|
"new_denoms": refreshSession.newDenoms,
|
|
"melt_coin": meltCoin,
|
|
"transfer_pubs": refreshSession.transferPubs,
|
|
"coin_evs": coinEvs,
|
|
};
|
|
console.log("melt request:", req);
|
|
let resp = await this.http.postJson(reqUrl.href(), req);
|
|
|
|
console.log("melt request:", req);
|
|
console.log("melt response:", resp.responseText);
|
|
|
|
if (resp.status != 200) {
|
|
console.error(resp.responseText);
|
|
throw Error("refresh failed");
|
|
}
|
|
|
|
let respJson = JSON.parse(resp.responseText);
|
|
|
|
if (!respJson) {
|
|
throw Error("exchange responded with garbage");
|
|
}
|
|
|
|
let norevealIndex = respJson.noreveal_index;
|
|
|
|
if (typeof norevealIndex != "number") {
|
|
throw Error("invalid response");
|
|
}
|
|
|
|
refreshSession.norevealIndex = norevealIndex;
|
|
|
|
await this.q().put(Stores.refresh, refreshSession).finish();
|
|
}
|
|
|
|
|
|
async refreshReveal(refreshSession: RefreshSessionRecord): Promise<void> {
|
|
let norevealIndex = refreshSession.norevealIndex;
|
|
if (norevealIndex == undefined) {
|
|
throw Error("can't reveal without melting first");
|
|
}
|
|
let privs = Array.from(refreshSession.transferPrivs);
|
|
privs.splice(norevealIndex, 1);
|
|
|
|
let req = {
|
|
"session_hash": refreshSession.hash,
|
|
"transfer_privs": privs,
|
|
};
|
|
|
|
let reqUrl = new URI("refresh/reveal")
|
|
.absoluteTo(refreshSession.exchangeBaseUrl);
|
|
console.log("reveal request:", req);
|
|
let resp = await this.http.postJson(reqUrl.href(), req);
|
|
|
|
console.log("session:", refreshSession);
|
|
console.log("reveal response:", resp);
|
|
|
|
if (resp.status != 200) {
|
|
console.log("error: /refresh/reveal returned status " + resp.status);
|
|
return;
|
|
}
|
|
|
|
let respJson = JSON.parse(resp.responseText);
|
|
|
|
if (!respJson.ev_sigs || !Array.isArray(respJson.ev_sigs)) {
|
|
console.log("/refresh/reveal did not contain ev_sigs");
|
|
}
|
|
|
|
let exchange = await this.q().get<ExchangeRecord>(Stores.exchanges,
|
|
refreshSession.exchangeBaseUrl);
|
|
if (!exchange) {
|
|
console.error(`exchange ${refreshSession.exchangeBaseUrl} not found`);
|
|
return;
|
|
}
|
|
|
|
let coins: CoinRecord[] = [];
|
|
|
|
for (let i = 0; i < respJson.ev_sigs.length; i++) {
|
|
let denom = await (
|
|
this.q()
|
|
.get(Stores.denominations,
|
|
[
|
|
refreshSession.exchangeBaseUrl,
|
|
refreshSession.newDenoms[i]
|
|
]));
|
|
if (!denom) {
|
|
console.error("denom not found");
|
|
continue;
|
|
}
|
|
let pc = refreshSession.preCoinsForGammas[refreshSession.norevealIndex!][i];
|
|
let denomSig = await this.cryptoApi.rsaUnblind(respJson.ev_sigs[i].ev_sig,
|
|
pc.blindingKey,
|
|
denom.denomPub);
|
|
let coin: CoinRecord = {
|
|
reservePub: undefined,
|
|
blindingKey: pc.blindingKey,
|
|
coinPub: pc.publicKey,
|
|
coinPriv: pc.privateKey,
|
|
denomPub: denom.denomPub,
|
|
denomSig: denomSig,
|
|
currentAmount: denom.value,
|
|
exchangeBaseUrl: refreshSession.exchangeBaseUrl,
|
|
status: CoinStatus.Fresh,
|
|
};
|
|
|
|
coins.push(coin);
|
|
}
|
|
|
|
refreshSession.finished = true;
|
|
|
|
await this.q()
|
|
.putAll(Stores.coins, coins)
|
|
.put(Stores.refresh, refreshSession)
|
|
.finish();
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrive the full event history for this wallet.
|
|
*/
|
|
async getHistory(): Promise<{history: HistoryRecord[]}> {
|
|
function collect(x: any, acc: any) {
|
|
acc.push(x);
|
|
return acc;
|
|
}
|
|
|
|
let history = await (
|
|
this.q()
|
|
.iterIndex(Stores.history.timestampIndex)
|
|
.reduce(collect, []));
|
|
|
|
return {history};
|
|
}
|
|
|
|
async getDenoms(exchangeUrl: string): Promise<DenominationRecord[]> {
|
|
let denoms = await this.q().iterIndex(Stores.denominations.exchangeBaseUrlIndex, exchangeUrl).toArray();
|
|
return denoms;
|
|
}
|
|
|
|
async getOffer(offerId: number): Promise<any> {
|
|
let offer = await this.q() .get(Stores.offers, offerId);
|
|
return offer;
|
|
}
|
|
|
|
async getExchanges(): Promise<ExchangeRecord[]> {
|
|
return this.q()
|
|
.iter<ExchangeRecord>(Stores.exchanges)
|
|
.flatMap((e) => [e])
|
|
.toArray();
|
|
}
|
|
|
|
async getCurrencies(): Promise<CurrencyRecord[]> {
|
|
return this.q()
|
|
.iter<CurrencyRecord>(Stores.currencies)
|
|
.flatMap((e) => [e])
|
|
.toArray();
|
|
}
|
|
|
|
async updateCurrency(currencyRecord: CurrencyRecord): Promise<void> {
|
|
console.log("updating currency to", currencyRecord);
|
|
await this.q()
|
|
.put(Stores.currencies, currencyRecord)
|
|
.finish();
|
|
this.notifier.notify();
|
|
}
|
|
|
|
async getReserves(exchangeBaseUrl: string): Promise<ReserveRecord[]> {
|
|
return this.q()
|
|
.iter<ReserveRecord>(Stores.reserves)
|
|
.filter((r: ReserveRecord) => r.exchange_base_url === exchangeBaseUrl)
|
|
.toArray();
|
|
}
|
|
|
|
async getCoins(exchangeBaseUrl: string): Promise<CoinRecord[]> {
|
|
return this.q()
|
|
.iter<CoinRecord>(Stores.coins)
|
|
.filter((c: CoinRecord) => c.exchangeBaseUrl === exchangeBaseUrl)
|
|
.toArray();
|
|
}
|
|
|
|
async getPreCoins(exchangeBaseUrl: string): Promise<PreCoinRecord[]> {
|
|
return this.q()
|
|
.iter<PreCoinRecord>(Stores.precoins)
|
|
.filter((c: PreCoinRecord) => c.exchangeBaseUrl === exchangeBaseUrl)
|
|
.toArray();
|
|
}
|
|
|
|
async hashContract(contract: Contract): Promise<string> {
|
|
return this.cryptoApi.hashString(canonicalJson(contract));
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate a nonce in form of an EdDSA public key.
|
|
* Store the private key in our DB, so we can prove ownership.
|
|
*/
|
|
async generateNonce(): Promise<string> {
|
|
let {priv, pub} = await this.cryptoApi.createEddsaKeypair();
|
|
await this.q()
|
|
.put(Stores.nonces, {priv, pub})
|
|
.finish();
|
|
return pub;
|
|
}
|
|
|
|
async getCurrencyRecord(currency: string): Promise<CurrencyRecord|undefined> {
|
|
return this.q().get(Stores.currencies, currency);
|
|
}
|
|
|
|
|
|
async paymentSucceeded(contractHash: string, merchantSig: string): Promise<any> {
|
|
const doPaymentSucceeded = async() => {
|
|
let t = await this.q().get<TransactionRecord>(Stores.transactions,
|
|
contractHash);
|
|
if (!t) {
|
|
console.error("contract not found");
|
|
return;
|
|
}
|
|
let merchantPub = t.contract.merchant_pub;
|
|
let valid = this.cryptoApi.isValidPaymentSignature(merchantSig, contractHash, merchantPub);
|
|
if (!valid) {
|
|
console.error("merchant payment signature invalid");
|
|
// FIXME: properly display error
|
|
return;
|
|
}
|
|
t.finished = true;
|
|
let modifiedCoins: CoinRecord[] = [];
|
|
for (let pc of t.payReq.coins) {
|
|
let c = await this.q().get<CoinRecord>(Stores.coins, pc.coin_pub);
|
|
if (!c) {
|
|
console.error("coin not found");
|
|
return;
|
|
}
|
|
c.status = CoinStatus.Dirty;
|
|
modifiedCoins.push(c);
|
|
}
|
|
|
|
await this.q()
|
|
.putAll(Stores.coins, modifiedCoins)
|
|
.put(Stores.transactions, t)
|
|
.finish();
|
|
for (let c of t.payReq.coins) {
|
|
this.refresh(c.coin_pub);
|
|
}
|
|
};
|
|
doPaymentSucceeded();
|
|
return;
|
|
}
|
|
|
|
async payback(coinPub: string): Promise<void> {
|
|
let coin = await this.q().get(Stores.coins, coinPub);
|
|
if (!coin) {
|
|
throw Error(`Coin ${coinPub} not found, can't request payback`);
|
|
}
|
|
let reservePub = coin.reservePub;
|
|
if (!reservePub) {
|
|
throw Error(`Can't request payback for a refreshed coin`);
|
|
}
|
|
let reserve = await this.q().get(Stores.reserves, reservePub);
|
|
if (!reserve) {
|
|
throw Error(`Reserve of coin ${coinPub} not found`);
|
|
}
|
|
switch (coin.status) {
|
|
case CoinStatus.Refreshed:
|
|
throw Error(`Can't do payback for coin ${coinPub} since it's refreshed`);
|
|
case CoinStatus.PaybackDone:
|
|
console.log(`Coin ${coinPub} already payed back`);
|
|
return;
|
|
}
|
|
coin.status = CoinStatus.PaybackPending;
|
|
// Even if we didn't get the payback yet, we suspend withdrawal, since
|
|
// technically we might update reserve status before we get the response
|
|
// from the reserve for the payback request.
|
|
reserve.hasPayback = true;
|
|
await this.q().put(Stores.coins, coin).put(Stores.reserves, reserve);
|
|
|
|
let paybackRequest = await this.cryptoApi.createPaybackRequest(coin);
|
|
let reqUrl = new URI("payback").absoluteTo(coin.exchangeBaseUrl);
|
|
let resp = await this.http.postJson(reqUrl.href(), paybackRequest);
|
|
if (resp.status != 200) {
|
|
throw Error();
|
|
}
|
|
let paybackConfirmation = PaybackConfirmation.checked(JSON.parse(resp.responseText));
|
|
if (paybackConfirmation.reserve_pub != coin.reservePub) {
|
|
throw Error(`Coin's reserve doesn't match reserve on payback`);
|
|
}
|
|
coin = await this.q().get(Stores.coins, coinPub);
|
|
if (!coin) {
|
|
throw Error(`Coin ${coinPub} not found, can't confirm payback`);
|
|
}
|
|
coin.status = CoinStatus.PaybackDone;
|
|
await this.q().put(Stores.coins, coin);
|
|
await this.updateReserve(reservePub!);
|
|
}
|
|
|
|
|
|
async denominationRecordFromKeys(exchangeBaseUrl: string, denomIn: Denomination): Promise<DenominationRecord> {
|
|
let denomPubHash = await this.cryptoApi.hashDenomPub(denomIn.denom_pub);
|
|
let d: DenominationRecord = {
|
|
denomPubHash,
|
|
denomPub: denomIn.denom_pub,
|
|
exchangeBaseUrl: exchangeBaseUrl,
|
|
feeDeposit: denomIn.fee_deposit,
|
|
masterSig: denomIn.master_sig,
|
|
feeRefund: denomIn.fee_refund,
|
|
feeRefresh: denomIn.fee_refresh,
|
|
feeWithdraw: denomIn.fee_withdraw,
|
|
stampExpireDeposit: denomIn.stamp_expire_deposit,
|
|
stampExpireLegal: denomIn.stamp_expire_legal,
|
|
stampExpireWithdraw: denomIn.stamp_expire_withdraw,
|
|
stampStart: denomIn.stamp_start,
|
|
status: DenominationStatus.Unverified,
|
|
isOffered: true,
|
|
value: denomIn.value,
|
|
};
|
|
return d;
|
|
}
|
|
|
|
async withdrawPaybackReserve(reservePub: string): Promise<void> {
|
|
let reserve = await this.q().get(Stores.reserves, reservePub);
|
|
if (!reserve) {
|
|
throw Error(`Reserve ${reservePub} does not exist`);
|
|
}
|
|
reserve.hasPayback = false;
|
|
await this.q().put(Stores.reserves, reserve);
|
|
this.depleteReserve(reserve);
|
|
}
|
|
|
|
async getPaybackReserves(): Promise<ReserveRecord[]> {
|
|
return await this.q().iter(Stores.reserves).filter(r => r.hasPayback).toArray()
|
|
}
|
|
|
|
}
|