105 lines
3.1 KiB
JavaScript
105 lines
3.1 KiB
JavaScript
import { clearTimeout, setTimeout } from "timers";
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import { pack, unpack } from "msgpackr";
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import { Buffer } from "buffer";
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import { isPromise } from "../util.js";
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export default class RpcQueryBase {
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_network;
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_query;
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_options;
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_promise;
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_timeoutTimer;
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_timeout = false;
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_completed = false;
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_responses = {};
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_errors = {};
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_promiseResolve;
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constructor(network, query, options = {}) {
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this._network = network;
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this._query = query;
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this._options = options;
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}
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get result() {
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return this._promise;
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}
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handeTimeout() {
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this.resolve(undefined, true);
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}
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resolve(data, timeout = false) {
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clearTimeout(this._timeoutTimer);
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this._timeout = timeout;
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this._completed = true;
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if (timeout) {
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data = {
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error: "timeout",
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};
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}
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this._promiseResolve?.(data);
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}
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run() {
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this._promise =
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this._promise ??
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new Promise((resolve) => {
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this._promiseResolve = resolve;
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});
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this._timeoutTimer =
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this._timeoutTimer ??
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setTimeout(this.handeTimeout.bind(this), (this._options.queryTimeout || this._network.queryTimeout) * 1000);
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this._network.ready.then(() => {
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const promises = [];
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for (const relay of this.getRelays()) {
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promises.push(this.queryRelay(relay));
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}
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Promise.allSettled(promises).then(() => this.checkResponses());
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});
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return this;
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}
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async queryRelay(relay) {
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let socket;
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let relayKey = relay;
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if (typeof relay === "string") {
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relayKey = Buffer.from(relay, "hex");
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}
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if (relay instanceof Buffer) {
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relayKey = relay;
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relay = relay.toString("hex");
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}
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try {
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socket = this._network.dht.connect(relayKey);
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if (isPromise(socket)) {
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socket = await socket;
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}
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}
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catch (e) {
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return;
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}
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return new Promise((resolve, reject) => {
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let timer;
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socket.on("data", (res) => {
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relay = relay;
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if (timer && timer.close) {
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clearTimeout(timer);
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}
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socket.end();
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const response = unpack(res);
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if (response && response.error) {
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this._errors[relay] = response.error;
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return reject(null);
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}
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this._responses[relay] = response;
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resolve(null);
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});
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socket.on("error", (error) => {
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relay = relay;
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this._errors[relay] = error;
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reject({ error });
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});
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socket.write("rpc");
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socket.write(pack(this._query));
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timer = setTimeout(() => {
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this._errors[relay] = "timeout";
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reject(null);
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}, (this._options.relayTimeout || this._network.relayTimeout) * 1000);
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});
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}
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}
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