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/*
This file is part of GNU Taler
(C) 2019 GNUnet e.V.
GNU 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.
GNU 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
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
import { generateFakeSegwitAddress } from "./bitcoin.js";
import { URLSearchParams } from "./url.js";
export type PaytoUri =
| PaytoUriUnknown
| PaytoUriIBAN
| PaytoUriTalerBank
| PaytoUriBitcoin;
export interface PaytoUriGeneric {
targetType: string;
targetPath: string;
params: { [name: string]: string };
}
export interface PaytoUriUnknown extends PaytoUriGeneric {
isKnown: false;
}
export interface PaytoUriIBAN extends PaytoUriGeneric {
isKnown: true;
targetType: "iban";
iban: string;
}
export interface PaytoUriTalerBank extends PaytoUriGeneric {
isKnown: true;
targetType: "x-taler-bank";
host: string;
account: string;
}
export interface PaytoUriBitcoin extends PaytoUriGeneric {
isKnown: true;
targetType: "bitcoin";
segwitAddrs: Array<string>;
}
const paytoPfx = "payto://";
/**
* Add query parameters to a payto URI
*/
export function addPaytoQueryParams(
s: string,
params: { [name: string]: string },
): string {
const [acct, search] = s.slice(paytoPfx.length).split("?");
const searchParams = new URLSearchParams(search || "");
for (const k of Object.keys(params)) {
searchParams.set(k, params[k]);
}
return paytoPfx + acct + "?" + searchParams.toString();
}
/**
* Serialize a PaytoURI into a valid payto:// string
*
* @param p
* @returns
*/
export function stringifyPaytoUri(p: PaytoUri): string {
const url = `${paytoPfx}${p.targetType}//${p.targetPath}`;
if (p.params) {
const search = Object.entries(p.params)
.map(([key, value]) => `${key}=${value}`)
.join("&");
return `${url}?${search}`;
}
return url;
}
/**
* Parse a valid payto:// uri into a PaytoUri object
* RFC 8905
*
* @param s
* @returns
*/
export function parsePaytoUri(s: string): PaytoUri | undefined {
if (!s.startsWith(paytoPfx)) {
return undefined;
}
const [acct, search] = s.slice(paytoPfx.length).split("?");
const firstSlashPos = acct.indexOf("/");
if (firstSlashPos === -1) {
return undefined;
}
const targetType = acct.slice(0, firstSlashPos);
const targetPath = acct.slice(firstSlashPos + 1);
const params: { [k: string]: string } = {};
const searchParams = new URLSearchParams(search || "");
searchParams.forEach((v, k) => {
params[k] = v;
});
if (targetType === "x-taler-bank") {
const parts = targetPath.split("/");
const host = parts[0];
const account = parts[1];
return {
targetPath,
targetType,
params,
isKnown: true,
host,
account,
};
}
if (targetType === "iban") {
return {
isKnown: true,
targetPath,
targetType,
params,
iban: targetPath,
};
}
if (targetType === "bitcoin") {
const msg = /\b([A-Z0-9]{52})\b/.exec(params["message"])
const reserve = !msg ? params["subject"] : msg[0];
const segwitAddrs = !reserve ? [] : generateFakeSegwitAddress(reserve, targetPath);
const result: PaytoUriBitcoin = {
isKnown: true,
targetPath,
targetType,
params,
segwitAddrs
};
return result;
}
return {
targetPath,
targetType,
params,
isKnown: false,
};
}
|
