wallet-core/extension/background/wallet.js

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'use strict';
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const DONE = 4;
const DB_NAME = "taler";
const DB_VERSION = 1;
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// Shown in the UI.
let backendFailed = false;
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/**
* Run a function with the opened taler DB.
*/
function withTalerDb(f) {
let req = indexedDB.open(DB_NAME, DB_VERSION);
req.addEventListener("error", (e) => {
// XXX: more details
backendFailed = true;
});
req.addEventListener("success", (e) => {
var db = e.target.result;
f(db);
});
req.addEventListener("upgradeneeded", (e) => {
console.log ("DB: upgrade needed: oldVersion = "+ event.oldVersion);
db = event.target.result;
switch (event.oldVersion) {
case 0: // DB does not exist yet
db.createObjectStore("mints", { keyPath: "mint_pub" });
db.createObjectStore("reserves", { keyPath: "reserve_pub"});
db.createObjectStore("denoms", { keyPath: "denom_pub" });
db.createObjectStore("coins", { keyPath: "coin_pub" });
db.createObjectStore("withdrawals", { keyPath: "id", autoIncrement: true });
db.createObjectStore("transactions", { keyPath: "id", autoIncrement: true });
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break;
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}
});
}
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function confirmReserve(db, detail, sendResponse) {
console.log('detail: ' + JSON.stringify(detail));
let keypair = createEddsaKeyPair();
let form = new FormData();
let now = new Date();
form.append(detail.field_amount, detail.amount_str);
form.append(detail.field_reserve_pub, keypair.pub);
form.append(detail.field_mint, detail.mint);
// XXX: set bank-specified fields.
let myRequest = new XMLHttpRequest();
console.log("making request to " + detail.post_url);
myRequest.open('post', detail.post_url);
myRequest.send(form);
myRequest.addEventListener('readystatechange', (e) => {
if (myRequest.readyState == DONE) {
let resp = {};
resp.status = myRequest.status;
resp.text = myRequest.responseText;
let reserveRecord = {
reserve_pub: keypair.pub,
reserve_priv: keypair.priv,
keypair: keypair,
mint_base_url: detail.mint,
created: now,
last_query: null,
current_amount: null,
// XXX: set to actual amount
initial_amount: null
};
// XXX: insert into db.
switch (myRequest.status) {
case 200:
resp.success = true;
// We can't show the page directly, so
// we show some generic page from the wallet.
resp.backlink = chrome.extension.getURL("pages/reserve-success.html");
let tx = db.transaction(['reserves'], 'readwrite');
tx.objectStore('reserves').add(reserveRecord);
tx.addEventListener('complete', (e) => {
console.log('tx complete');
sendResponse(resp);
});
break;
default:
resp.success = false;
sendResponse(resp);
}
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}
});
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// Allow async response
return true;
}
withTalerDb((db) => {
console.log("db loaded");
chrome.runtime.onMessage.addListener(
function (req, sender, onresponse) {
// XXX: use assoc. instead of switch?
switch (req.type)
{
case "confirm-reserve":
return confirmReserve(db, req.detail, onresponse)
break;
}
});
});