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"use strict";
var DB = function () {
let DB = {}; // returned object with exported functions
let DB_NAME = "taler";
let DB_VERSION = 1;
let db = null;
let is_ready = null;
DB.open = function (onsuccess, onerror)
{
is_ready = false;
let req = indexedDB.open(DB_NAME, DB_VERSION);
req.onerror = onerror;
req.onsuccess = function (event)
{
db = event.target.result;
is_ready = true;
if (onsuccess)
onsuccess();
};
req.onupgradeneeded = function (event)
{
console.log ("DB: upgrade needed: oldVersion = "+ event.oldVersion);
db = event.target.result;
db.onerror = onerror;
switch (event.oldVersion)
{
case 0: // DB does not exist yet
{
let example = {};
let mints = db.createObjectStore("mints", { keyPath: "mint_pub" });
mints.createIndex("name", "name", { unique: true });
example.mint = {
mint_pub: "<mint's master pub key>", // length: 32
name: "Mint One",
url: "https://mint.one/",
};
let denoms = db.createObjectStore("denoms", { keyPath: "denom_pub" });
example.denom = {
denom_pub: "<denom pub key>", // length: 32
mint_pub: "<mint's master pub key>", // length: 32
mint_sig: "<mint's sig>", // length: 64
withdraw_expiry_time: 1234567890,
deposit_expiry_time: 1234567890,
start_time: 1234567890,
value: {
value: 1,
fraction: 230000, // 0..999999
currency: "EUR",
},
fee: {
withdraw: {
value: 0,
fraction: 100000,
currency: "EUR",
},
deposit: {
value: 0,
fraction: 100000,
currency: "EUR",
},
refresh: {
value: 0,
fraction: 100000,
currency: "EUR",
},
},
};
let reserves = db.createObjectStore("reserves", { keyPath: "reserve_pub"});
example.reserve = {
reserve_pub: "<pub key>",
reserve_priv: "<priv key>",
mint_pub: "<mint's master pub key>",
initial: {
value: 1,
fraction: 230000,
currency: "EUR",
},
current: {
value: 1,
fraction: 230000,
currency: "EUR",
blind_session_pub: "<pub key>",
status_sig: "<sig>",
},
};
let withdrawals = db.createObjectStore("withdrawals", { keyPath: "id", autoIncrement: true });
example.withdrawal = {
id: 1, // generated
reserve_pub: "<pub key>",
reserve_sig: "<sig>",
denom_pub: "<pub key",
blind_session_pub: "<pub key>",
blind_priv: "<priv key>",
coin_pub: "<pub key>",
coin_priv: "<priv key>",
coin_ev: "",
};
let coins = db.createObjectStore("coins", { keyPath: "coin_pub" });
example.coin = {
// coin either has a withdraw_id or refresh_id
// or it is imported in which case both are null
withdraw_id: 1, // can be null
refresh_id: null, // can be null
is_refreshed: false,
denom_pub: "<pub key>",
coin_pub: "<pub key>",
coin_priv: "<priv key>",
denom_sig: "<sig>",
spent: {
value: 1,
fraction: 230000,
},
transactions: [ 123, 456 ], // list of transaction IDs where this coin was used
};
let transactions = db.createObjectStore("transactions", { keyPath: "id", autoIncrement: true });
example.transaction = {
id: 1, // generated
wire_hash: "<hash>",
value: {
value: 1,
fraction: 230000,
currency: "EUR",
},
contract: "<JSON>",
is_checkout_done: true,
is_confirmed: true,
fulfillment_url: "https://some.shop/transaction/completed",
};
let refresh = db.createObjectStore("refresh");
example.refresh = {
// TODO
};
}
}
is_ready = true;
if (onsuccess)
onsuccess();
}
};
DB.close = function ()
{
db.close();
};
DB.wallet_get = function (onresult, onerror)
{
let wallet = { };
let tr = db.transaction([ "coins", "denoms" ], "readonly");
let coins = tr.objectStore("coins");
let denoms = tr.objectStore("denoms");
let coins_cur = coins.openCursor();
coins_cur.onerror = onerror;
coins_cur.onsuccess = function ()
{
let cur = event.target.result;
if (cur) {
let denom_get = denoms.get(cur.valcue.denom_pub);
denom_get.onerror = onerror;
denom_get.onsuccess = function (event)
{
let denom = event.target.result;
if (denom.currency in wallet)
{
let w = wallet[denom.currency];
w.value += denom.value;
w.fraction = (w.fraction + denom.fraction) % 1000000;
if (1000000 <= w.fraction + denom.fraction)
w.value++;
}
else
{
wallet[denom.currency] = denom;
}
cur.continue();
}
}
else // no more entries
{
onresult(wallet);
}
};
};
DB.transaction_list = function (onresult, onerror)
{
// TODO
};
DB.reserve_list = function (onresult, onerror)
{
// TODO
};
return DB;
}();
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