bam-ticketing-sdk
Version:
SDK for B.A.M Ticketing API
106 lines • 4.47 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.qrToTicketData = exports.qrToTicketInvalidateCall = exports.createQrPayloadForTicket = exports.decodeQrPayload = exports.encodeQrPayload = void 0;
const base45_1 = __importDefault(require("base45"));
const utils_1 = require("../blockchain/utils");
const certificate_1 = require("../utils/certificate");
const __1 = require("..");
/**
* Encodes the payload and the signature into the expected QR code payload
*
* @param payload JSON stringified payload
* @param signatureHex Hex encoded signature of the payload
* @returns base 45 encoded string
*/
function encodeQrPayload(payload, signatureHex) {
const payloadBuffer = Buffer.from(payload);
const signatureBuffer = Buffer.from(signatureHex, 'hex');
const payloadEncoded = base45_1.default.encode(payloadBuffer);
const signatureEncoded = base45_1.default.encode(signatureBuffer);
return `${payloadEncoded}:::${signatureEncoded}`;
}
exports.encodeQrPayload = encodeQrPayload;
/**
* Decode a base 45 encoded QR code payload
*
* @param encodedPayload what you scanned from the QR code
* @returns payload and its signature
*/
function decodeQrPayload(encodedPayload) {
const [payloadEncoded, signatureEncoded] = encodedPayload.split(':::');
const payloadBuffer = base45_1.default.decode(payloadEncoded);
const signatureBuffer = base45_1.default.decode(signatureEncoded);
const payload = payloadBuffer.toString();
const signature = signatureBuffer.toString('hex');
return {
payload,
signature,
};
}
exports.decodeQrPayload = decodeQrPayload;
/**
* Signs and encodes ticket data into the string which will be put in the QR code
*
* @param eventId event to which the ticket belongs
* @param ticketConfigId ticket config of the ticket
* @param sequenceNumber the serial number of the ticket
* @param privateKey the private key which is used to sign the ticket
* @returns string to display as a tickets QR code
*/
function createQrPayloadForTicket(eventId, ticketConfigId, sequenceNumber, privateKey) {
// Encode the ticket ID
const ticketId = `E${eventId}TC${ticketConfigId}T${sequenceNumber}`;
const payload = JSON.stringify({
id: ticketId,
});
const signature = (0, certificate_1.sign)(payload, privateKey);
return encodeQrPayload(payload, signature);
}
exports.createQrPayloadForTicket = createQrPayloadForTicket;
/**
* Decodes, verifies the signature of the QR code payload and constructs the blockchain
* function call to invalidate the ticket
*
* @param qrCodePayload content of the QR code
* @param invalidationDate the time at which the ticket was scanned
* @param publicKey key used to verify the ticket signature, if specified
* @returns blockchain function call for ticket invalidation
* @throws Error if the signature does not match the payload
*/
function qrToTicketInvalidateCall(qrCodePayload, invalidationDate, publicKey) {
const qrContent = decodeQrPayload(qrCodePayload);
if (publicKey) {
const signatureValid = (0, certificate_1.verify)(qrContent.payload, qrContent.signature, publicKey);
if (!signatureValid) {
throw new Error('Invalid ticket signature');
}
}
const payload = JSON.parse(qrContent.payload);
const args = (0, __1.createInvalidatePayload)(payload.id, invalidationDate);
return (0, __1.createInvalidateCall)(args);
}
exports.qrToTicketInvalidateCall = qrToTicketInvalidateCall;
/**
* Decodes and verifies the signature of the QR code payload and returns the IDs
*
* @param qrCodePayload content of the QR code
* @param publicKey key used to verify the ticket signature, if specified
* @returns ticket IDs
* @throws Error if the signature does not match the payload
*/
function qrToTicketData(qrCodePayload, publicKey) {
const qrContent = decodeQrPayload(qrCodePayload);
if (publicKey) {
const signatureValid = (0, certificate_1.verify)(qrContent.payload, qrContent.signature, publicKey);
if (!signatureValid) {
throw new Error('Invalid ticket signature');
}
}
const payload = JSON.parse(qrContent.payload);
return (0, utils_1.parseTicketId)(payload.id);
}
exports.qrToTicketData = qrToTicketData;
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