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/*
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/>
*/
/**
* Common types that are used by Taler.
*
* Note most types are defined in wallet.ts, types that
* are defined in types.ts are intended to be used by components
* that do not depend on the whole wallet implementation (which depends on
* emscripten).
*
* @author Florian Dold
*/
import { Checkable } from "./checkable";
@Checkable.Class
export class AmountJson {
@Checkable.Number
value: number;
@Checkable.Number
fraction: number;
@Checkable.String
currency: string;
static checked: (obj: any) => AmountJson;
}
export interface ReserveRecord {
reserve_pub: string;
reserve_priv: string,
exchange_base_url: string,
created: number,
last_query: number | null,
/**
* Current amount left in the reserve
*/
current_amount: AmountJson | null,
/**
* Amount requested when the reserve was created.
* When a reserve is re-used (rare!) the current_amount can
* be higher than the requested_amount
*/
requested_amount: AmountJson,
/**
* Amount we've already withdrawn from the reserve.
*/
withdrawn_amount: AmountJson;
confirmed: boolean,
}
@Checkable.Class
export class CreateReserveResponse {
/**
* Exchange URL where the bank should create the reserve.
* The URL is canonicalized in the response.
*/
@Checkable.String
exchange: string;
@Checkable.String
reservePub: string;
static checked: (obj: any) => CreateReserveResponse;
}
@Checkable.Class
export class Denomination {
@Checkable.Value(AmountJson)
value: AmountJson;
@Checkable.String
denom_pub: string;
@Checkable.Value(AmountJson)
fee_withdraw: AmountJson;
@Checkable.Value(AmountJson)
fee_deposit: AmountJson;
@Checkable.Value(AmountJson)
fee_refresh: AmountJson;
@Checkable.Value(AmountJson)
fee_refund: AmountJson;
@Checkable.String
stamp_start: string;
@Checkable.String
stamp_expire_withdraw: string;
@Checkable.String
stamp_expire_legal: string;
@Checkable.String
stamp_expire_deposit: string;
@Checkable.String
master_sig: string;
static checked: (obj: any) => Denomination;
}
export interface IExchangeInfo {
baseUrl: string;
masterPublicKey: string;
/**
* All denominations we ever received from the exchange.
* Expired denominations may be garbage collected.
*/
all_denoms: Denomination[];
/**
* Denominations we received with the last update.
* Subset of "denoms".
*/
active_denoms: Denomination[];
/**
* Timestamp for last update.
*/
last_update_time: number;
}
export interface WireInfo {
[type: string]: any;
}
export interface ReserveCreationInfo {
exchangeInfo: IExchangeInfo;
wireInfo: WireInfo;
selectedDenoms: Denomination[];
withdrawFee: AmountJson;
overhead: AmountJson;
}
/**
* A coin that isn't yet signed by an exchange.
*/
export interface PreCoin {
coinPub: string;
coinPriv: string;
reservePub: string;
denomPub: string;
blindingKey: string;
withdrawSig: string;
coinEv: string;
exchangeBaseUrl: string;
coinValue: AmountJson;
}
export interface RefreshPreCoin {
publicKey: string;
privateKey: string;
coinEv: string;
blindingKey: string
}
/**
* Ongoing refresh
*/
export interface RefreshSession {
/**
* Public key that's being melted in this session.
*/
meltCoinPub: string;
/**
* How much of the coin's value is melted away
* with this refresh session?
*/
valueWithFee: AmountJson
/**
* Signature to confirm the melting.
*/
confirmSig: string;
/**
* Denominations of the newly requested coins
*/
newDenoms: string[];
preCoinsForGammas: RefreshPreCoin[][];
/**
* The transfer keys, kappa of them.
*/
transferPubs: string[];
transferPrivs: string[];
/**
* The no-reveal-index after we've done the melting.
*/
norevealIndex?: number;
/**
* Hash of the session.
*/
hash: string;
exchangeBaseUrl: string;
}
export interface CoinPaySig {
coin_sig: string;
coin_pub: string;
ub_sig: string;
denom_pub: string;
f: AmountJson;
}
/**
* Coin as stored in the "coins" data store
* of the wallet database.
*/
export interface Coin {
/**
* Public key of the coin.
*/
coinPub: string;
/**
* Private key to authorize operations on the coin.
*/
coinPriv: string;
/**
* Key used by the exchange used to sign the coin.
*/
denomPub: string;
/**
* Unblinded signature by the exchange.
*/
denomSig: string;
/**
* Amount that's left on the coin.
*/
currentAmount: AmountJson;
/**
* Base URL that identifies the exchange from which we got the
* coin.
*/
exchangeBaseUrl: string;
/**
* We have withdrawn the coin, but it's not accepted by the exchange anymore.
* We have to tell an auditor and wait for compensation or for the exchange
* to fix it.
*/
suspended?: boolean;
}
@Checkable.Class
export class ExchangeHandle {
@Checkable.String
master_pub: string;
@Checkable.String
url: string;
static checked: (obj: any) => ExchangeHandle;
}
@Checkable.Class
export class Contract {
@Checkable.String
H_wire: string;
@Checkable.Value(AmountJson)
amount: AmountJson;
@Checkable.List(Checkable.AnyObject)
auditors: any[];
@Checkable.String
expiry: string;
@Checkable.Any
locations: any;
@Checkable.Value(AmountJson)
max_fee: AmountJson;
@Checkable.Any
merchant: any;
@Checkable.String
merchant_pub: string;
@Checkable.List(Checkable.Value(ExchangeHandle))
exchanges: ExchangeHandle[];
@Checkable.List(Checkable.AnyObject)
products: any[];
@Checkable.String
refund_deadline: string;
@Checkable.String
timestamp: string;
@Checkable.Number
transaction_id: number;
@Checkable.String
fulfillment_url: string;
@Checkable.Optional(Checkable.String)
repurchase_correlation_id: string;
@Checkable.Optional(Checkable.String)
receiver: string;
static checked: (obj: any) => Contract;
}
export type PayCoinInfo = Array<{ updatedCoin: Coin, sig: CoinPaySig }>;
export namespace Amounts {
export interface Result {
amount: AmountJson;
// Was there an over-/underflow?
saturated: boolean;
}
function getMaxAmount(currency: string): AmountJson {
return {
currency,
value: Number.MAX_SAFE_INTEGER,
fraction: 2 ** 32,
}
}
export function getZero(currency: string): AmountJson {
return {
currency,
value: 0,
fraction: 0,
}
}
export function add(first: AmountJson, ...rest: AmountJson[]): Result {
let currency = first.currency;
let value = first.value + Math.floor(first.fraction / 1e6);
if (value > Number.MAX_SAFE_INTEGER) {
return { amount: getMaxAmount(currency), saturated: true };
}
let fraction = first.fraction % 1e6;
for (let x of rest) {
if (x.currency !== currency) {
throw Error(`Mismatched currency: ${x.currency} and ${currency}`);
}
value = value + x.value + Math.floor((fraction + x.fraction) / 1e6);
fraction = (fraction + x.fraction) % 1e6;
if (value > Number.MAX_SAFE_INTEGER) {
return { amount: getMaxAmount(currency), saturated: true };
}
}
return { amount: { currency, value, fraction }, saturated: false };
}
export function sub(a: AmountJson, b: AmountJson): Result {
if (a.currency !== b.currency) {
throw Error(`Mismatched currency: ${a.currency} and ${b.currency}`);
}
let currency = a.currency;
let value = a.value;
let fraction = a.fraction;
if (fraction < b.fraction) {
if (value < 1) {
return { amount: { currency, value: 0, fraction: 0 }, saturated: true };
}
value--;
fraction += 1e6;
}
console.assert(fraction >= b.fraction);
fraction -= b.fraction;
if (value < b.value) {
return { amount: { currency, value: 0, fraction: 0 }, saturated: true };
}
value -= b.value;
return { amount: { currency, value, fraction }, saturated: false };
}
export function cmp(a: AmountJson, b: AmountJson): number {
if (a.currency !== b.currency) {
throw Error(`Mismatched currency: ${a.currency} and ${b.currency}`);
}
let av = a.value + Math.floor(a.fraction / 1e6);
let af = a.fraction % 1e6;
let bv = b.value + Math.floor(b.fraction / 1e6);
let bf = b.fraction % 1e6;
switch (true) {
case av < bv:
return -1;
case av > bv:
return 1;
case af < bf:
return -1;
case af > bf:
return 1;
case af == bf:
return 0;
default:
throw Error("assertion failed");
}
}
export function copy(a: AmountJson): AmountJson {
return {
value: a.value,
fraction: a.fraction,
currency: a.currency,
}
}
export function isNonZero(a: AmountJson) {
return a.value > 0 || a.fraction > 0;
}
}
export interface CheckRepurchaseResult {
isRepurchase: boolean;
existingContractHash?: string;
existingFulfillmentUrl?: string;
}
export interface Notifier {
notify(): void;
}
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