374 lines
10 KiB
TypeScript
374 lines
10 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/>
|
|
*/
|
|
|
|
|
|
/**
|
|
* Script that is injected into (all!) pages to allow them
|
|
* to interact with the GNU Taler wallet via DOM Events.
|
|
*
|
|
* @author Florian Dold
|
|
*/
|
|
|
|
|
|
/// <reference path="../lib/decl/chrome/chrome.d.ts" />
|
|
/// <reference path="../lib/decl/urijs/URIjs.d.ts" />
|
|
|
|
"use strict";
|
|
|
|
declare var cloneInto: any;
|
|
|
|
// Make sure we don't pollute the namespace too much.
|
|
namespace TalerNotify {
|
|
const PROTOCOL_VERSION = 1;
|
|
|
|
let logVerbose: boolean = false;
|
|
try {
|
|
logVerbose = !!localStorage.getItem("taler-log-verbose");
|
|
} catch (e) {
|
|
// can't read from local storage
|
|
}
|
|
|
|
if (!taler) {
|
|
console.error("Taler wallet lib not included, HTTP 402 payments not" +
|
|
" supported");
|
|
}
|
|
|
|
function subst(url: string, H_contract: string) {
|
|
url = url.replace("${H_contract}", H_contract);
|
|
url = url.replace("${$}", "$");
|
|
return url;
|
|
}
|
|
|
|
interface Handler {
|
|
type: string;
|
|
listener: (e: CustomEvent) => void|Promise<void>;
|
|
}
|
|
const handlers: Handler[] = [];
|
|
|
|
function hashContract(contract: string): Promise<string> {
|
|
let walletHashContractMsg = {
|
|
type: "hash-contract",
|
|
detail: {contract}
|
|
};
|
|
return new Promise((resolve, reject) => {
|
|
chrome.runtime.sendMessage(walletHashContractMsg, (resp: any) => {
|
|
if (!resp.hash) {
|
|
console.log("error", resp);
|
|
reject(Error("hashing failed"));
|
|
}
|
|
resolve(resp.hash);
|
|
});
|
|
});
|
|
}
|
|
|
|
function checkRepurchase(contract: string): Promise<any> {
|
|
const walletMsg = {
|
|
type: "check-repurchase",
|
|
detail: {
|
|
contract: contract
|
|
},
|
|
};
|
|
return new Promise((resolve, reject) => {
|
|
chrome.runtime.sendMessage(walletMsg, (resp: any) => {
|
|
resolve(resp);
|
|
});
|
|
});
|
|
}
|
|
|
|
function putHistory(historyEntry: any): Promise<void> {
|
|
const walletMsg = {
|
|
type: "put-history-entry",
|
|
detail: {
|
|
historyEntry,
|
|
},
|
|
};
|
|
return new Promise((resolve, reject) => {
|
|
chrome.runtime.sendMessage(walletMsg, (resp: any) => {
|
|
resolve();
|
|
});
|
|
});
|
|
}
|
|
|
|
function saveOffer(offer: any): Promise<number> {
|
|
const walletMsg = {
|
|
type: "save-offer",
|
|
detail: {
|
|
offer: {
|
|
contract: offer.contract,
|
|
merchant_sig: offer.merchant_sig,
|
|
H_contract: offer.H_contract,
|
|
offer_time: new Date().getTime() / 1000
|
|
},
|
|
},
|
|
};
|
|
return new Promise((resolve, reject) => {
|
|
chrome.runtime.sendMessage(walletMsg, (resp: any) => {
|
|
resolve(resp);
|
|
});
|
|
});
|
|
}
|
|
|
|
function init() {
|
|
chrome.runtime.sendMessage({type: "get-tab-cookie"}, (resp) => {
|
|
if (chrome.runtime.lastError) {
|
|
logVerbose && console.log("extension not yet ready");
|
|
window.setTimeout(init, 200);
|
|
return;
|
|
}
|
|
registerHandlers();
|
|
// Hack to know when the extension is unloaded
|
|
let port = chrome.runtime.connect();
|
|
|
|
port.onDisconnect.addListener(() => {
|
|
logVerbose && console.log("chrome runtime disconnected, removing handlers");
|
|
for (let handler of handlers) {
|
|
document.removeEventListener(handler.type, handler.listener);
|
|
}
|
|
});
|
|
|
|
if (resp && resp.type === "fetch") {
|
|
logVerbose && console.log("it's fetch");
|
|
taler.internalOfferContractFrom(resp.contractUrl);
|
|
document.documentElement.style.visibility = "hidden";
|
|
|
|
} else if (resp && resp.type === "execute") {
|
|
logVerbose && console.log("it's execute");
|
|
document.documentElement.style.visibility = "hidden";
|
|
taler.internalExecutePayment(resp.contractHash,
|
|
resp.payUrl,
|
|
resp.offerUrl);
|
|
}
|
|
});
|
|
}
|
|
|
|
logVerbose && console.log("loading Taler content script");
|
|
init();
|
|
|
|
interface HandlerFn {
|
|
(detail: any, sendResponse: (msg: any) => void): void;
|
|
}
|
|
|
|
function registerHandlers() {
|
|
/**
|
|
* Add a handler for a DOM event, which automatically
|
|
* handles adding sequence numbers to responses.
|
|
*/
|
|
function addHandler(type: string, handler: HandlerFn) {
|
|
let handlerWrap = (e: CustomEvent) => {
|
|
if (e.type != type) {
|
|
throw Error(`invariant violated`);
|
|
}
|
|
let callId: number|undefined = undefined;
|
|
if (e.detail && e.detail.callId != undefined) {
|
|
callId = e.detail.callId;
|
|
}
|
|
let responder = (msg?: any) => {
|
|
let fullMsg = Object.assign({}, msg, {callId});
|
|
let opts = { detail: fullMsg };
|
|
if ("function" == typeof cloneInto) {
|
|
opts = cloneInto(opts, document.defaultView);
|
|
}
|
|
let evt = new CustomEvent(type + "-result", opts);
|
|
document.dispatchEvent(evt);
|
|
};
|
|
handler(e.detail, responder);
|
|
};
|
|
document.addEventListener(type, handlerWrap);
|
|
handlers.push({type, listener: handlerWrap});
|
|
}
|
|
|
|
|
|
addHandler("taler-query-id", (msg: any, sendResponse: any) => {
|
|
// FIXME: maybe include this info in taoer-probe?
|
|
sendResponse({id: chrome.runtime.id})
|
|
});
|
|
|
|
addHandler("taler-probe", (msg: any, sendResponse: any) => {
|
|
sendResponse();
|
|
});
|
|
|
|
addHandler("taler-create-reserve", (msg: any) => {
|
|
let params = {
|
|
amount: JSON.stringify(msg.amount),
|
|
callback_url: URI(msg.callback_url)
|
|
.absoluteTo(document.location.href),
|
|
bank_url: document.location.href,
|
|
wt_types: JSON.stringify(msg.wt_types),
|
|
};
|
|
let uri = URI(chrome.extension.getURL("pages/confirm-create-reserve.html"));
|
|
let redirectUrl = uri.query(params).href();
|
|
window.location.href = redirectUrl;
|
|
});
|
|
|
|
addHandler("taler-confirm-reserve", (msg: any, sendResponse: any) => {
|
|
let walletMsg = {
|
|
type: "confirm-reserve",
|
|
detail: {
|
|
reservePub: msg.reserve_pub
|
|
}
|
|
};
|
|
chrome.runtime.sendMessage(walletMsg, (resp) => {
|
|
sendResponse();
|
|
});
|
|
});
|
|
|
|
|
|
addHandler("taler-confirm-contract", async(msg: any) => {
|
|
if (!msg.contract_wrapper) {
|
|
console.error("contract wrapper missing");
|
|
return;
|
|
}
|
|
|
|
const offer = msg.contract_wrapper;
|
|
|
|
if (!offer.contract) {
|
|
console.error("contract field missing");
|
|
return;
|
|
}
|
|
|
|
if (!offer.H_contract) {
|
|
console.error("H_contract field missing");
|
|
return;
|
|
}
|
|
|
|
let walletHashContractMsg = {
|
|
type: "hash-contract",
|
|
detail: {contract: offer.contract}
|
|
};
|
|
|
|
let contractHash = await hashContract(offer.contract);
|
|
|
|
if (contractHash != offer.H_contract) {
|
|
console.error("merchant-supplied contract hash is wrong");
|
|
return;
|
|
}
|
|
|
|
let resp = await checkRepurchase(offer.contract);
|
|
|
|
if (resp.error) {
|
|
console.error("wallet backend error", resp);
|
|
return;
|
|
}
|
|
|
|
if (resp.isRepurchase) {
|
|
logVerbose && console.log("doing repurchase");
|
|
console.assert(resp.existingFulfillmentUrl);
|
|
console.assert(resp.existingContractHash);
|
|
window.location.href = subst(resp.existingFulfillmentUrl,
|
|
resp.existingContractHash);
|
|
|
|
} else {
|
|
|
|
let merchantName = "(unknown)";
|
|
try {
|
|
merchantName = offer.contract.merchant.name;
|
|
} catch (e) {
|
|
// bad contract / name not included
|
|
}
|
|
|
|
let historyEntry = {
|
|
timestamp: (new Date).getTime(),
|
|
subjectId: `contract-${contractHash}`,
|
|
type: "offer-contract",
|
|
detail: {
|
|
contractHash,
|
|
merchantName,
|
|
}
|
|
};
|
|
await putHistory(historyEntry);
|
|
let offerId = await saveOffer(offer);
|
|
|
|
const uri = URI(chrome.extension.getURL(
|
|
"pages/confirm-contract.html"));
|
|
const params = {
|
|
offerId: offerId.toString(),
|
|
};
|
|
const target = uri.query(params).href();
|
|
if (msg.replace_navigation === true) {
|
|
document.location.replace(target);
|
|
} else {
|
|
document.location.href = target;
|
|
}
|
|
}
|
|
});
|
|
|
|
addHandler("taler-payment-failed", (msg: any, sendResponse: any) => {
|
|
const walletMsg = {
|
|
type: "payment-failed",
|
|
detail: {
|
|
contractHash: msg.H_contract
|
|
},
|
|
};
|
|
chrome.runtime.sendMessage(walletMsg, (resp) => {
|
|
sendResponse();
|
|
})
|
|
});
|
|
|
|
addHandler("taler-payment-succeeded", (msg: any, sendResponse: any) => {
|
|
if (!msg.H_contract) {
|
|
console.error("H_contract missing in taler-payment-succeeded");
|
|
return;
|
|
}
|
|
logVerbose && console.log("got taler-payment-succeeded");
|
|
const walletMsg = {
|
|
type: "payment-succeeded",
|
|
detail: {
|
|
contractHash: msg.H_contract,
|
|
},
|
|
};
|
|
chrome.runtime.sendMessage(walletMsg, (resp) => {
|
|
sendResponse();
|
|
})
|
|
});
|
|
|
|
addHandler("taler-get-payment", (msg: any, sendResponse: any) => {
|
|
const walletMsg = {
|
|
type: "execute-payment",
|
|
detail: {
|
|
H_contract: msg.H_contract,
|
|
},
|
|
};
|
|
|
|
chrome.runtime.sendMessage(walletMsg, (resp) => {
|
|
if (resp.rateLimitExceeded) {
|
|
console.error("rate limit exceeded, check for redirect loops");
|
|
}
|
|
|
|
if (!resp.success) {
|
|
if (msg.offering_url) {
|
|
window.location.href = msg.offering_url;
|
|
} else {
|
|
console.error("execute-payment failed", resp);
|
|
}
|
|
return;
|
|
}
|
|
let contract = resp.contract;
|
|
if (!contract) {
|
|
throw Error("contract missing");
|
|
}
|
|
|
|
// We have the details for then payment, the merchant page
|
|
// is responsible to give it to the merchant.
|
|
sendResponse({
|
|
H_contract: msg.H_contract,
|
|
contract: resp.contract,
|
|
payment: resp.payReq,
|
|
});
|
|
});
|
|
});
|
|
}
|
|
}
|