942 lines
24 KiB
TypeScript
942 lines
24 KiB
TypeScript
/*
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This file is part of TALER
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(C) 2015 GNUnet e.V.
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* High-level wallet operations that should be indepentent from the underlying
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* browser extension interface.
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* @module Wallet
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* @author Florian Dold
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*/
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import * as native from "./emscriptif";
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import {HttpResponse, RequestException} from "./http";
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import {Query} from "./query";
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import {Checkable} from "./checkable";
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"use strict";
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export interface Mint {
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baseUrl: string;
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keys: Keys
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}
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export interface CoinWithDenom {
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coin: Coin;
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denom: Denomination;
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}
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export interface Keys {
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denoms: Denomination[];
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}
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export interface Denomination {
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value: AmountJson;
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denom_pub: string;
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fee_withdraw: AmountJson;
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fee_deposit: AmountJson;
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stamp_expire_withdraw: string;
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}
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export interface PreCoin {
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coinPub: string;
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coinPriv: string;
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reservePub: string;
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denomPub: string;
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blindingKey: string;
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withdrawSig: string;
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coinEv: string;
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mintBaseUrl: string;
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coinValue: AmountJson;
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}
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export interface Coin {
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coinPub: string;
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coinPriv: string;
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denomPub: string;
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denomSig: string;
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currentAmount: AmountJson;
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mintBaseUrl: string;
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}
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@Checkable.Class
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export class AmountJson {
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@Checkable.Number
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value: number;
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@Checkable.Number
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fraction: number;
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@Checkable.String
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currency: string;
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static checked: (obj: any) => AmountJson;
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}
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@Checkable.Class
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export class CreateReserveRequest {
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/**
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* The initial amount for the reserve.
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*/
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@Checkable.Value(AmountJson)
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amount: AmountJson;
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/**
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* Mint URL where the bank should create the reserve.
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*/
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@Checkable.String
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mint: string;
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static checked: (obj: any) => CreateReserveRequest;
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}
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@Checkable.Class
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export class CreateReserveResponse {
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/**
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* Mint URL where the bank should create the reserve.
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* The URL is canonicalized in the response.
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*/
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@Checkable.String
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mint: string;
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@Checkable.String
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reservePub: string;
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static checked: (obj: any) => CreateReserveResponse;
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}
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@Checkable.Class
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export class ConfirmReserveRequest {
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/**
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* Public key of then reserve that should be marked
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* as confirmed.
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*/
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@Checkable.String
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reservePub: string;
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static checked: (obj: any) => ConfirmReserveRequest;
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}
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@Checkable.Class
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export class MintInfo {
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@Checkable.String
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master_pub: string;
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@Checkable.String
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url: string;
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static checked: (obj: any) => MintInfo;
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}
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@Checkable.Class
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export class Contract {
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@Checkable.String
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H_wire: string;
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@Checkable.Value(AmountJson)
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amount: AmountJson;
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@Checkable.List(Checkable.AnyObject)
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auditors: any[];
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@Checkable.String
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expiry: string;
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@Checkable.Any
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locations: any;
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@Checkable.Value(AmountJson)
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max_fee: AmountJson;
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@Checkable.Any
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merchant: any;
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@Checkable.String
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merchant_pub: string;
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@Checkable.List(Checkable.Value(MintInfo))
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mints: MintInfo[];
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@Checkable.List(Checkable.AnyObject)
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products: any[];
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@Checkable.String
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refund_deadline: string;
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@Checkable.String
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timestamp: string;
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@Checkable.Number
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transaction_id: number;
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@Checkable.String
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fulfillment_url: string;
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static checked: (obj: any) => Contract;
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}
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@Checkable.Class
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export class Offer {
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@Checkable.Value(Contract)
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contract: Contract;
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@Checkable.String
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merchant_sig: string;
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@Checkable.String
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H_contract: string;
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static checked: (obj: any) => Offer;
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}
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interface ConfirmPayRequest {
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offer: Offer;
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}
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interface MintCoins {
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[mintUrl: string]: CoinWithDenom[];
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}
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interface CoinPaySig {
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coin_sig: string;
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coin_pub: string;
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ub_sig: string;
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denom_pub: string;
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f: AmountJson;
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}
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interface Transaction {
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contractHash: string;
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contract: any;
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payReq: any;
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}
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interface Reserve {
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mint_base_url: string
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reserve_priv: string;
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reserve_pub: string;
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}
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export interface Badge {
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setText(s: string): void;
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setColor(c: string): void;
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}
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type PayCoinInfo = Array<{ updatedCoin: Coin, sig: CoinPaySig }>;
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function getTalerStampSec(stamp: string) {
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const m = stamp.match(/\/?Date\(([0-9]*)\)\/?/);
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if (!m) {
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return null;
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}
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return parseInt(m[1]);
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}
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function isWithdrawableDenom(d: Denomination) {
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const now_sec = (new Date).getTime() / 1000;
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const stamp_withdraw_sec = getTalerStampSec(d.stamp_expire_withdraw);
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// Withdraw if still possible to withdraw within a minute
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if (stamp_withdraw_sec + 60 > now_sec) {
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return true;
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}
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return false;
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}
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/**
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* See http://api.taler.net/wallet.html#general
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*/
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function canonicalizeBaseUrl(url) {
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let x = new URI(url);
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if (!x.protocol()) {
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x.protocol("https");
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}
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x.path(x.path() + "/").normalizePath();
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x.fragment();
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x.query();
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return x.href()
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}
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function parsePrettyAmount(pretty: string): AmountJson {
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const res = /([0-9]+)(.[0-9]+)?\s*(\w+)/.exec(pretty);
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if (!res) {
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return null;
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}
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return {
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value: parseInt(res[1], 10),
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fraction: res[2] ? (parseFloat(`0.${res[2]}`) * 1e-6) : 0,
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currency: res[3]
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}
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}
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interface HttpRequestLibrary {
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req(method: string,
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url: string|uri.URI,
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options?: any): Promise<HttpResponse>;
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get(url: string|uri.URI): Promise<HttpResponse>;
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postJson(url: string|uri.URI, body): Promise<HttpResponse>;
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postForm(url: string|uri.URI, form): Promise<HttpResponse>;
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}
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function copy(o) {
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return JSON.parse(JSON.stringify(o));
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}
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function rankDenom(denom1: any, denom2: any) {
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// Slow ... we should find a better way than to convert it evert time.
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let v1 = new native.Amount(denom1.value);
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let v2 = new native.Amount(denom2.value);
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return (-1) * v1.cmp(v2);
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}
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export class Wallet {
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private db: IDBDatabase;
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private http: HttpRequestLibrary;
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private badge: Badge;
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constructor(db: IDBDatabase, http: HttpRequestLibrary, badge: Badge) {
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this.db = db;
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this.http = http;
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this.badge = badge;
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}
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private static signDeposit(offer: Offer,
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cds: CoinWithDenom[]): PayCoinInfo {
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let ret = [];
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let amountSpent = native.Amount.getZero(cds[0].coin.currentAmount.currency);
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let amountRemaining = new native.Amount(offer.contract.amount);
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cds = copy(cds);
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for (let cd of cds) {
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let coinSpend;
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if (amountRemaining.value == 0 && amountRemaining.fraction == 0) {
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break;
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}
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if (amountRemaining.cmp(new native.Amount(cd.coin.currentAmount)) < 0) {
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coinSpend = new native.Amount(amountRemaining.toJson());
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} else {
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coinSpend = new native.Amount(cd.coin.currentAmount);
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}
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amountSpent.add(coinSpend);
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amountRemaining.sub(coinSpend);
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let newAmount = new native.Amount(cd.coin.currentAmount);
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newAmount.sub(coinSpend);
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cd.coin.currentAmount = newAmount.toJson();
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let args: native.DepositRequestPS_Args = {
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h_contract: native.HashCode.fromCrock(offer.H_contract),
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h_wire: native.HashCode.fromCrock(offer.contract.H_wire),
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amount_with_fee: coinSpend.toNbo(),
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coin_pub: native.EddsaPublicKey.fromCrock(cd.coin.coinPub),
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deposit_fee: new native.Amount(cd.denom.fee_deposit).toNbo(),
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merchant: native.EddsaPublicKey.fromCrock(offer.contract.merchant_pub),
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refund_deadline: native.AbsoluteTimeNbo.fromTalerString(offer.contract.refund_deadline),
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timestamp: native.AbsoluteTimeNbo.fromTalerString(offer.contract.timestamp),
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transaction_id: native.UInt64.fromNumber(offer.contract.transaction_id),
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};
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let d = new native.DepositRequestPS(args);
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let coinSig = native.eddsaSign(d.toPurpose(),
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native.EddsaPrivateKey.fromCrock(cd.coin.coinPriv))
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.toCrock();
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let s: CoinPaySig = {
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coin_sig: coinSig,
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coin_pub: cd.coin.coinPub,
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ub_sig: cd.coin.denomSig,
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denom_pub: cd.coin.denomPub,
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f: coinSpend.toJson(),
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};
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ret.push({sig: s, updatedCoin: cd.coin});
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}
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return ret;
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}
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/**
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* Get mints and associated coins that are still spendable,
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* but only if the sum the coins' remaining value exceeds the payment amount.
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* @param paymentAmount
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* @param depositFeeLimit
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* @param allowedMints
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*/
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private getPossibleMintCoins(paymentAmount: AmountJson,
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depositFeeLimit: AmountJson,
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allowedMints: MintInfo[]): Promise<MintCoins> {
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let m: MintCoins = {};
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function storeMintCoin(mc) {
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let mint = mc[0];
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let coin = mc[1];
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let cd = {
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coin: coin,
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denom: mint.keys.denoms.find((e) => e.denom_pub === coin.denomPub)
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};
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if (!cd.denom) {
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throw Error("denom not found (database inconsistent)");
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}
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let x = m[mint.baseUrl];
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if (!x) {
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m[mint.baseUrl] = [cd];
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} else {
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x.push(cd);
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}
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}
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let ps = allowedMints.map((info) => {
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return Query(this.db)
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.iter("mints", {indexName: "pubKey", only: info.master_pub})
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.indexJoin("coins", "mintBaseUrl", (mint) => mint.baseUrl)
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.reduce(storeMintCoin);
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});
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return Promise.all(ps).then(() => {
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let ret: MintCoins = {};
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nextMint:
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for (let key in m) {
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let coins = m[key].map((x) => ({
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a: new native.Amount(x.denom.fee_deposit),
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c: x
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}));
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// Sort by ascending deposit fee
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coins.sort((o1, o2) => o1.a.cmp(o2.a));
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let maxFee = new native.Amount(depositFeeLimit);
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let minAmount = new native.Amount(paymentAmount);
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let accFee = new native.Amount(coins[0].c.denom.fee_deposit);
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let accAmount = native.Amount.getZero(coins[0].c.coin.currentAmount.currency);
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let usableCoins: CoinWithDenom[] = [];
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nextCoin:
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for (let i = 0; i < coins.length; i++) {
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let coinAmount = new native.Amount(coins[i].c.coin.currentAmount);
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let coinFee = coins[i].a;
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if (coinAmount.cmp(coinFee) <= 0) {
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continue nextCoin;
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}
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accFee.add(coinFee);
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accAmount.add(coinAmount);
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if (accFee.cmp(maxFee) >= 0) {
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console.log("too much fees");
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continue nextMint;
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}
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usableCoins.push(coins[i].c);
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if (accAmount.cmp(minAmount) >= 0) {
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ret[key] = usableCoins;
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continue nextMint;
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}
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}
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}
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return ret;
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});
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}
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/**
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* Record all information that is necessary to
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* pay for a contract in the wallet's database.
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*/
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private recordConfirmPay(offer: Offer,
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payCoinInfo: PayCoinInfo,
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chosenMint: string): Promise<void> {
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let payReq = {};
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payReq["amount"] = offer.contract.amount;
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payReq["coins"] = payCoinInfo.map((x) => x.sig);
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payReq["H_contract"] = offer.H_contract;
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payReq["max_fee"] = offer.contract.max_fee;
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payReq["merchant_sig"] = offer.merchant_sig;
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payReq["mint"] = URI(chosenMint).href();
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payReq["refund_deadline"] = offer.contract.refund_deadline;
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payReq["timestamp"] = offer.contract.timestamp;
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payReq["transaction_id"] = offer.contract.transaction_id;
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let t: Transaction = {
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contractHash: offer.H_contract,
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contract: offer.contract,
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payReq: payReq,
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};
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let historyEntry = {
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type: "pay",
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timestamp: (new Date).getTime(),
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detail: {
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merchantName: offer.contract.merchant.name,
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amount: offer.contract.amount,
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contractHash: offer.H_contract,
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fulfillmentUrl: offer.contract.fulfillment_url
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}
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};
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return Query(this.db)
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.put("transactions", t)
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.put("history", historyEntry)
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.putAll("coins", payCoinInfo.map((pci) => pci.updatedCoin))
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.finish();
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}
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/**
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* Add a contract to the wallet and sign coins,
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* but do not send them yet.
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*/
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confirmPay(offer: Offer): Promise<any> {
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return Promise.resolve().then(() => {
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return this.getPossibleMintCoins(offer.contract.amount,
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offer.contract.max_fee,
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offer.contract.mints)
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}).then((mcs) => {
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if (Object.keys(mcs).length == 0) {
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return {
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error: "coins-insufficient",
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};
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}
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let mintUrl = Object.keys(mcs)[0];
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let ds = Wallet.signDeposit(offer, mcs[mintUrl]);
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return this.recordConfirmPay(offer, ds, mintUrl)
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.then((() => ({})));
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});
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}
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/**
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* Retrieve all necessary information for looking up the contract
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* with the given hash.
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*/
|
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executePayment(H_contract): Promise<any> {
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return Promise.resolve().then(() => {
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return Query(this.db)
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.get("transactions", H_contract)
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.then((t) => {
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if (!t) {
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return {
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success: false,
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contractFound: false,
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}
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}
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let resp = {
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success: true,
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payReq: t.payReq,
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contract: t.contract,
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};
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return resp;
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});
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});
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}
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|
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/**
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* First fetch information requred to withdraw from the reserve,
|
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* then deplete the reserve, withdrawing coins until it is empty.
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*/
|
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private initReserve(reserveRecord) {
|
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this.updateMintFromUrl(reserveRecord.mint_base_url)
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.then((mint) =>
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this.updateReserve(reserveRecord.reserve_pub, mint)
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.then((reserve) => this.depleteReserve(reserve,
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mint)))
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.then(() => {
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let depleted = {
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type: "depleted-reserve",
|
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timestamp: (new Date).getTime(),
|
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detail: {
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reservePub: reserveRecord.reserve_pub,
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}
|
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};
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return Query(this.db).put("history", depleted).finish();
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})
|
|
.catch((e) => {
|
|
console.error("Failed to deplete reserve", e.stack);
|
|
});
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a reserve, but do not flag it as confirmed yet.
|
|
*/
|
|
createReserve(req: CreateReserveRequest): Promise<CreateReserveResponse> {
|
|
const reservePriv = native.EddsaPrivateKey.create();
|
|
const reservePub = reservePriv.getPublicKey();
|
|
|
|
const now = (new Date).getTime();
|
|
const canonMint = canonicalizeBaseUrl(req.mint);
|
|
|
|
const reserveRecord = {
|
|
reserve_pub: reservePub.toCrock(),
|
|
reserve_priv: reservePriv.toCrock(),
|
|
mint_base_url: canonMint,
|
|
created: now,
|
|
last_query: null,
|
|
current_amount: null,
|
|
requested_amount: req.amount,
|
|
confirmed: false,
|
|
};
|
|
|
|
|
|
const historyEntry = {
|
|
type: "create-reserve",
|
|
timestamp: now,
|
|
detail: {
|
|
requestedAmount: req.amount,
|
|
reservePub: reserveRecord.reserve_pub,
|
|
}
|
|
};
|
|
|
|
return Query(this.db)
|
|
.put("reserves", reserveRecord)
|
|
.put("history", historyEntry)
|
|
.finish()
|
|
.then(() => {
|
|
let r: CreateReserveResponse = {
|
|
mint: canonMint,
|
|
reservePub: reservePub.toCrock(),
|
|
};
|
|
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 mint 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.
|
|
*/
|
|
confirmReserve(req: ConfirmReserveRequest): Promise<void> {
|
|
const now = (new Date).getTime();
|
|
const historyEntry = {
|
|
type: "confirm-reserve",
|
|
timestamp: now,
|
|
detail: {
|
|
reservePub: req.reservePub,
|
|
}
|
|
};
|
|
return Query(this.db)
|
|
.get("reserves", req.reservePub)
|
|
.then((r) => {
|
|
r.confirmed = true;
|
|
return Query(this.db)
|
|
.put("reserves", r)
|
|
.put("history", historyEntry)
|
|
.finish()
|
|
.then(() => {
|
|
// Do this in the background
|
|
this.initReserve(r);
|
|
});
|
|
});
|
|
}
|
|
|
|
|
|
private withdrawPrepare(denom: Denomination,
|
|
reserve: Reserve): Promise<PreCoin> {
|
|
let reservePriv = new native.EddsaPrivateKey();
|
|
reservePriv.loadCrock(reserve.reserve_priv);
|
|
let reservePub = new native.EddsaPublicKey();
|
|
reservePub.loadCrock(reserve.reserve_pub);
|
|
let denomPub = native.RsaPublicKey.fromCrock(denom.denom_pub);
|
|
let coinPriv = native.EddsaPrivateKey.create();
|
|
let coinPub = coinPriv.getPublicKey();
|
|
let blindingFactor = native.RsaBlindingKey.create(1024);
|
|
let pubHash: native.HashCode = coinPub.hash();
|
|
let ev: native.ByteArray = native.rsaBlind(pubHash,
|
|
blindingFactor,
|
|
denomPub);
|
|
|
|
if (!denom.fee_withdraw) {
|
|
throw Error("Field fee_withdraw missing");
|
|
}
|
|
|
|
let amountWithFee = new native.Amount(denom.value);
|
|
amountWithFee.add(new native.Amount(denom.fee_withdraw));
|
|
let withdrawFee = new native.Amount(denom.fee_withdraw);
|
|
|
|
// Signature
|
|
let withdrawRequest = new native.WithdrawRequestPS({
|
|
reserve_pub: reservePub,
|
|
amount_with_fee: amountWithFee.toNbo(),
|
|
withdraw_fee: withdrawFee.toNbo(),
|
|
h_denomination_pub: denomPub.encode().hash(),
|
|
h_coin_envelope: ev.hash()
|
|
});
|
|
|
|
var sig = native.eddsaSign(withdrawRequest.toPurpose(), reservePriv);
|
|
|
|
let preCoin: PreCoin = {
|
|
reservePub: reservePub.toCrock(),
|
|
blindingKey: blindingFactor.toCrock(),
|
|
coinPub: coinPub.toCrock(),
|
|
coinPriv: coinPriv.toCrock(),
|
|
denomPub: denomPub.encode().toCrock(),
|
|
mintBaseUrl: reserve.mint_base_url,
|
|
withdrawSig: sig.toCrock(),
|
|
coinEv: ev.toCrock(),
|
|
coinValue: denom.value
|
|
};
|
|
|
|
return Query(this.db).put("precoins", preCoin).finish().then(() => preCoin);
|
|
}
|
|
|
|
|
|
private withdrawExecute(pc: PreCoin): Promise<Coin> {
|
|
return Query(this.db)
|
|
.get("reserves", pc.reservePub)
|
|
.then((r) => {
|
|
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 = URI("reserve/withdraw").absoluteTo(r.mint_base_url);
|
|
return this.http.postJson(reqUrl, wd);
|
|
})
|
|
.then(resp => {
|
|
if (resp.status != 200) {
|
|
throw new RequestException({
|
|
hint: "Withdrawal failed",
|
|
status: resp.status
|
|
});
|
|
}
|
|
let r = JSON.parse(resp.responseText);
|
|
let denomSig = native.rsaUnblind(native.RsaSignature.fromCrock(r.ev_sig),
|
|
native.RsaBlindingKey.fromCrock(pc.blindingKey),
|
|
native.RsaPublicKey.fromCrock(pc.denomPub));
|
|
let coin: Coin = {
|
|
coinPub: pc.coinPub,
|
|
coinPriv: pc.coinPriv,
|
|
denomPub: pc.denomPub,
|
|
denomSig: denomSig.encode().toCrock(),
|
|
currentAmount: pc.coinValue,
|
|
mintBaseUrl: pc.mintBaseUrl,
|
|
};
|
|
return coin;
|
|
});
|
|
}
|
|
|
|
|
|
updateBadge() {
|
|
function countNonEmpty(c, n) {
|
|
if (c.currentAmount.fraction != 0 || c.currentAmount.value != 0) {
|
|
return n + 1;
|
|
}
|
|
return n;
|
|
}
|
|
|
|
function doBadge(n) {
|
|
this.badge.setText(n.toString());
|
|
this.badge.setColor("#0F0");
|
|
}
|
|
|
|
Query(this.db)
|
|
.iter("coins")
|
|
.reduce(countNonEmpty, 0)
|
|
.then(doBadge.bind(this));
|
|
}
|
|
|
|
|
|
storeCoin(coin: Coin): Promise<void> {
|
|
let historyEntry = {
|
|
type: "withdraw",
|
|
timestamp: (new Date).getTime(),
|
|
detail: {
|
|
coinPub: coin.coinPub,
|
|
}
|
|
};
|
|
return Query(this.db)
|
|
.delete("precoins", coin.coinPub)
|
|
.add("coins", coin)
|
|
.add("history", historyEntry)
|
|
.finish()
|
|
.then(() => {
|
|
this.updateBadge();
|
|
});
|
|
}
|
|
|
|
|
|
private withdraw(denom, reserve): Promise<void> {
|
|
return this.withdrawPrepare(denom, reserve)
|
|
.then((pc) => this.withdrawExecute(pc))
|
|
.then((c) => this.storeCoin(c));
|
|
}
|
|
|
|
|
|
/**
|
|
* Withdraw coins from a reserve until it is empty.
|
|
*/
|
|
private depleteReserve(reserve, mint: Mint): Promise<void> {
|
|
let denoms: Denomination[] = copy(mint.keys.denoms);
|
|
let remaining = new native.Amount(reserve.current_amount);
|
|
|
|
denoms = denoms.filter(isWithdrawableDenom);
|
|
|
|
denoms.sort(rankDenom);
|
|
let workList = [];
|
|
for (let i = 0; i < 1000; i++) {
|
|
let found = false;
|
|
for (let d of denoms) {
|
|
let cost = new native.Amount(d.value);
|
|
cost.add(new native.Amount(d.fee_withdraw));
|
|
if (remaining.cmp(cost) < 0) {
|
|
continue;
|
|
}
|
|
found = true;
|
|
remaining.sub(cost);
|
|
workList.push(d);
|
|
}
|
|
if (!found) {
|
|
console.log("did not find coins for remaining ", remaining.toJson());
|
|
break;
|
|
}
|
|
}
|
|
|
|
return new Promise<void>((resolve, reject) => {
|
|
// Do the request one by one.
|
|
let next = () => {
|
|
if (workList.length == 0) {
|
|
resolve();
|
|
return;
|
|
}
|
|
let d = workList.pop();
|
|
console.log("withdrawing", JSON.stringify(d));
|
|
this.withdraw(d, reserve)
|
|
.then(() => next())
|
|
.catch((e) => {
|
|
console.log("Failed to withdraw coin", e.stack);
|
|
reject();
|
|
});
|
|
};
|
|
|
|
// Asynchronous recursion
|
|
next();
|
|
});
|
|
}
|
|
|
|
|
|
private updateReserve(reservePub: string, mint): Promise<Reserve> {
|
|
return Query(this.db)
|
|
.get("reserves", reservePub)
|
|
.then((reserve) => {
|
|
let reqUrl = URI("reserve/status").absoluteTo(mint.baseUrl);
|
|
reqUrl.query({'reserve_pub': reservePub});
|
|
return this.http.get(reqUrl).then(resp => {
|
|
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(),
|
|
detail: {
|
|
reservePub,
|
|
oldAmount,
|
|
newAmount
|
|
}
|
|
};
|
|
return Query(this.db)
|
|
.put("reserves", reserve)
|
|
.finish()
|
|
.then(() => reserve);
|
|
});
|
|
});
|
|
}
|
|
|
|
|
|
/**
|
|
* Update or add mint DB entry by fetching the /keys information.
|
|
* Optionally link the reserve entry to the new or existing
|
|
* mint entry in then DB.
|
|
*/
|
|
private updateMintFromUrl(baseUrl): Promise<Mint> {
|
|
let reqUrl = URI("keys").absoluteTo(baseUrl);
|
|
return this.http.get(reqUrl).then((resp) => {
|
|
if (resp.status != 200) {
|
|
throw Error("/keys request failed");
|
|
}
|
|
let mintKeysJson = JSON.parse(resp.responseText);
|
|
if (!mintKeysJson) {
|
|
throw new RequestException({url: reqUrl, hint: "keys invalid"});
|
|
}
|
|
let mint: Mint = {
|
|
baseUrl: baseUrl,
|
|
keys: mintKeysJson
|
|
};
|
|
return Query(this.db).put("mints", mint).finish().then(() => mint);
|
|
});
|
|
}
|
|
|
|
|
|
getBalances(): Promise<any> {
|
|
function collectBalances(c: Coin, byCurrency) {
|
|
let acc: AmountJson = byCurrency[c.currentAmount.currency];
|
|
if (!acc) {
|
|
acc = native.Amount.getZero(c.currentAmount.currency).toJson();
|
|
}
|
|
let am = new native.Amount(c.currentAmount);
|
|
am.add(new native.Amount(acc));
|
|
byCurrency[c.currentAmount.currency] = am.toJson();
|
|
return byCurrency;
|
|
}
|
|
|
|
return Query(this.db)
|
|
.iter("coins")
|
|
.reduce(collectBalances, {});
|
|
}
|
|
|
|
|
|
getHistory() {
|
|
function collect(x, acc) {
|
|
acc.push(x);
|
|
return acc;
|
|
}
|
|
|
|
return Query(this.db)
|
|
.iter("history", {indexName: "timestamp"})
|
|
.reduce(collect, [])
|
|
}
|
|
} |