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/*
This file is part of GNU Taler
(C) 2024 Taler Systems S.A.
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/>
*/
/**
* Imports.
*/
import { Amounts } from "./index.js";
import { parsePaytoUri } from "./payto.js";
type EncodeResult = { type: "ok"; qrContent: string } | { type: "skip" };
/**
* See "Schweizer Implementation Guidelines QR-Rechnung".
*/
function encodePaytoAsSwissQrBill(paytoUri: string): EncodeResult {
const parsedPayto = parsePaytoUri(paytoUri);
if (!parsedPayto) {
throw Error("invalid payto URI");
}
if (parsedPayto.targetType !== "iban") {
return { type: "skip" };
}
const amountStr = parsedPayto.params["amount"];
if (amountStr === undefined) {
return { type: "skip" };
}
const iban = parsedPayto.targetPath;
const countryCode = iban.slice(0, 2);
const lines = [
"SPC", // QRType
"0200", // Version
"1", // Character set (1: UTF-8)
iban, // Beneficiary IBAN
// Group: Beneficiary
"S", // Address type (S: structured)
parsedPayto.params["receiver-name"], // Beneficiary name
"", // street
"", // apt. nr.
parsedPayto.params["receiver-postal-code"], // town, // postal code
parsedPayto.params["receiver-town"], // town
countryCode, // Country
// Group: Ultimate Debtor (not used in version 0200)
"", // Ultimate Debtor Address type (S: structured)
"", // Ultimate Debtor name
"", // Ultimate Debtor street
"", // Ultimate Debtor apt. nr
"", // Ultimate Debtor postal code
"", // Ultimate Debtor town
"", // Ultimate Debtor country
// Group: Amount
Amounts.stringifyValue(amountStr, 2), // Amount
Amounts.currencyOf(amountStr), // Currency
// Group: Debtor
"", // Address type (S: structured)
"", // Debtor name
"", // Debtor street
"", // Debtor apt. nr
"", // Debtor postal code
"", // Debtor town
"", // Debtor country
// Group: Reference
"NON", // reference type
"", // Reference
// Group: Additional Information
parsedPayto.params["message"], // Unstructured data
"EPD", // End of payment data
];
return {
type: "ok",
qrContent: lines.join("\n"),
};
}
/**
* See "Quick Response Code - Guidelines to
* Enable the Data Capture for the
* Initiation of a SEPA Credit Transfer".
*/
function encodePaytoAsEpcQr(paytoUri: string): EncodeResult {
const parsedPayto = parsePaytoUri(paytoUri);
if (!parsedPayto) {
throw Error("invalid payto URI");
}
if (parsedPayto.targetType !== "iban") {
return { type: "skip" };
}
const amountStr = parsedPayto.params["amount"];
const parts = parsedPayto.targetPath.split("/");
const iban = parts[parts.length - 1];
const amt =
amountStr !== undefined
? `${Amounts.currencyOf(amountStr)}${Amounts.stringifyValue(
amountStr,
2,
)}`
: "";
const lines = [
"BCD", // service tag
"002", // version
"1", // character set (1: UTF-8)
"SCT", // Identification
"", // optional BIC
parsedPayto.params["receiver-name"], // Beneficiary name
iban, // Beneficiary IBAN
amt, // Amount (optional)
"", // AT-44 Purpose
parsedPayto.params["message"], // AT-05 Unstructured remittance information
];
return {
type: "ok",
qrContent: lines.join("\n"),
};
}
/**
* Specification of a QR code that includes payment information.
*/
export interface QrCodeSpec {
/**
* Type of the QR code.
*
* Depending on the type, different visual styles
* might be applied.
*/
type: string;
/**
* Content of the QR code that should be rendered.
*/
qrContent: string;
}
/**
* Get applicable QR code specifications for the given payto URI.
*/
export function getQrCodesForPayto(paytoUri: string): QrCodeSpec[] {
const res: QrCodeSpec[] = [];
{
const qr = encodePaytoAsEpcQr(paytoUri);
if (qr.type == "ok") {
res.push({
type: "epc-qr",
qrContent: qr.qrContent,
});
}
}
{
const qr = encodePaytoAsSwissQrBill(paytoUri);
if (qr.type == "ok") {
res.push({
type: "spc",
qrContent: qr.qrContent,
});
}
}
return res;
}
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