verus-zmq-client
Version:
Verus Coin Javascript/Typescript client for ZMQ messaging.
99 lines • 8.09 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __asyncValues = (this && this.__asyncValues) || function (o) {
if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
var m = o[Symbol.asyncIterator], i;
return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.VerusZmqClient = void 0;
const zeromq_1 = require("zeromq");
class VerusZmqClient {
constructor(options, sub = new zeromq_1.Subscriber()) {
this.options = options;
this.sub = sub;
}
connect() {
try {
this.sub.connect(this.connectionString);
this.subscribe();
console.info(`Connected to ${this.connectionString}...`);
return this;
}
catch (e) {
throw new Error(`Failed to connect to the ZMQ server.\nError Detail: ${e}`);
}
}
get nativeEvents() { return this.sub.events; }
get connectionString() { return this.options.connection.getAddress(); }
listen() {
return __awaiter(this, void 0, void 0, function* () {
var _a, e_1, _b, _c;
const eh = this.options.getEventHandlers();
try {
for (var _d = true, _e = __asyncValues(this.sub), _f; _f = yield _e.next(), _a = _f.done, !_a; _d = true) {
_c = _f.value;
_d = false;
const [rawTopic, rawMessage] = _c;
const stringTopic = rawTopic.toString();
const stringMessage = rawMessage.toString('hex');
const eventName = this.getEventName(stringTopic);
try {
const beforeEventResult = eh['before'](rawMessage, stringTopic);
const receivedEventResult = eh[eventName](stringMessage, stringTopic, beforeEventResult);
eh['after'](stringMessage, stringTopic, receivedEventResult);
}
catch (e) {
throw new Error(`Failed to process ZMQ data.\nTopic ${stringTopic}:${eventName} \nData: ${stringMessage}.\nError Detail: ${e}`);
}
}
}
catch (e_1_1) { e_1 = { error: e_1_1 }; }
finally {
try {
if (!_d && !_a && (_b = _e.return)) yield _b.call(_e);
}
finally { if (e_1) throw e_1.error; }
}
});
}
disconnect() {
try {
this.unsubscribe();
this.sub.disconnect(this.connectionString);
this.sub.close();
console.info(`Disconnected from ${this.connectionString}...`);
}
catch (e) {
throw new Error(`Failed to disconnect from the ZMQ server.\nError Detail: ${e}`);
}
}
subscribe() {
this.options.topics.forEach((t) => this.sub.subscribe(t));
}
unsubscribe() {
this.options.topics.forEach((t) => this.sub.unsubscribe(t));
}
getEventName(topic) {
const t = topic.toLocaleLowerCase();
if (t.includes("sequence")) {
return "onSequenceReceived";
}
var result = "on";
result += (t.includes("raw")) ? "Raw" : "Hash";
result += (t.includes("block")) ? "Block" : "Tx";
return result + 'Received';
}
}
exports.VerusZmqClient = VerusZmqClient;
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