@0xpolygonid/js-sdk
Version:
SDK to work with Polygon ID
74 lines (73 loc) • 2.8 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.MessageBus = exports.SDK_EVENTS = void 0;
const pubsub_js_1 = __importDefault(require("pubsub-js"));
exports.SDK_EVENTS = {
TX_RECEIPT_ACCEPTED: 'TX_RECEIPT_ACCEPTED'
};
/**
* Represents a message bus that allows publishing and subscribing to topics.
*/
class MessageBus {
/**
* Private constructor for the MessageBus class.
*/
// eslint-disable-next-line @typescript-eslint/no-empty-function
constructor() { }
/**
* Returns the singleton instance of the MessageBus class.
* If the instance doesn't exist, it creates a new one.
* @returns The singleton instance of the MessageBus class.
*/
static getInstance() {
// If the instance doesn't exist, create it
if (!MessageBus.instance) {
MessageBus.instance = new MessageBus();
}
// Return the instance
return MessageBus.instance;
}
/**
* Publishes a message to the specified topic.
*
* @template T - The type of data being published.
* @param {SdkTopic} topic - The topic to publish the message to.
* @param {T} data - The data to be published.
* @returns {boolean} - Returns true if the message was successfully published, false otherwise.
*/
publish(topic, data) {
return pubsub_js_1.default.publish(topic.toString(), data);
}
/**
* Subscribes to a specific topic and registers a callback function to be executed when a message is published.
*
* @param topic - The topic to subscribe to.
* @param callback - The callback function to be executed when a message is published.
*/
subscribe(topic, callback) {
return pubsub_js_1.default.subscribe(topic.toString(), (_, data) => callback(data));
}
/**
* Subscribes to a specific topic and registers a callback function to be executed when a message is published.
* The callback function is executed only once.
*
* @param topic - The topic to subscribe to.
* @param callback - The callback function to be executed when a message is published.
*/
subscribeOnce(topic, callback) {
pubsub_js_1.default.subscribeOnce(topic.toString(), (_, data) => callback(data));
}
/**
* Unsubscribes from a specific topic in the message bus.
*
* @param topic - The topic to unsubscribe from.
* @returns A string or boolean indicating the success of the unsubscribe operation.
*/
unsubscribe(topic) {
return pubsub_js_1.default.unsubscribe(topic.toString());
}
}
exports.MessageBus = MessageBus;