367 lines
16 KiB
JavaScript
367 lines
16 KiB
JavaScript
"use strict";
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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if (typeof b !== "function" && b !== null)
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throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __generator = (this && this.__generator) || function (thisArg, body) {
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var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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function verb(n) { return function (v) { return step([n, v]); }; }
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function step(op) {
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if (f) throw new TypeError("Generator is already executing.");
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while (_) try {
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if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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if (y = 0, t) op = [op[0] & 2, t.value];
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switch (op[0]) {
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case 0: case 1: t = op; break;
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case 4: _.label++; return { value: op[1], done: false };
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case 5: _.label++; y = op[1]; op = [0]; continue;
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
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default:
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if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
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if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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if (t[2]) _.ops.pop();
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_.trys.pop(); continue;
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}
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op = body.call(thisArg, _);
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} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
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}
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.WebSocketProvider = void 0;
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var bignumber_1 = require("@ethersproject/bignumber");
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var properties_1 = require("@ethersproject/properties");
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var json_rpc_provider_1 = require("./json-rpc-provider");
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var ws_1 = require("./ws");
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var logger_1 = require("@ethersproject/logger");
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var _version_1 = require("./_version");
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var logger = new logger_1.Logger(_version_1.version);
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/**
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* Notes:
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*
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* This provider differs a bit from the polling providers. One main
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* difference is how it handles consistency. The polling providers
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* will stall responses to ensure a consistent state, while this
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* WebSocket provider assumes the connected backend will manage this.
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*
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* For example, if a polling provider emits an event which indicats
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* the event occurred in blockhash XXX, a call to fetch that block by
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* its hash XXX, if not present will retry until it is present. This
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* can occur when querying a pool of nodes that are mildly out of sync
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* with each other.
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*/
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var NextId = 1;
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// For more info about the Real-time Event API see:
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// https://geth.ethereum.org/docs/rpc/pubsub
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var WebSocketProvider = /** @class */ (function (_super) {
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__extends(WebSocketProvider, _super);
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function WebSocketProvider(url, network) {
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var _this = this;
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// This will be added in the future; please open an issue to expedite
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if (network === "any") {
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logger.throwError("WebSocketProvider does not support 'any' network yet", logger_1.Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "network:any"
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});
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}
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_this = _super.call(this, url, network) || this;
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_this._pollingInterval = -1;
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_this._wsReady = false;
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properties_1.defineReadOnly(_this, "_websocket", new ws_1.WebSocket(_this.connection.url));
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properties_1.defineReadOnly(_this, "_requests", {});
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properties_1.defineReadOnly(_this, "_subs", {});
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properties_1.defineReadOnly(_this, "_subIds", {});
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properties_1.defineReadOnly(_this, "_detectNetwork", _super.prototype.detectNetwork.call(_this));
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// Stall sending requests until the socket is open...
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_this._websocket.onopen = function () {
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_this._wsReady = true;
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Object.keys(_this._requests).forEach(function (id) {
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_this._websocket.send(_this._requests[id].payload);
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});
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};
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_this._websocket.onmessage = function (messageEvent) {
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var data = messageEvent.data;
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var result = JSON.parse(data);
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if (result.id != null) {
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var id = String(result.id);
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var request = _this._requests[id];
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delete _this._requests[id];
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if (result.result !== undefined) {
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request.callback(null, result.result);
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_this.emit("debug", {
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action: "response",
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request: JSON.parse(request.payload),
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response: result.result,
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provider: _this
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});
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}
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else {
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var error = null;
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if (result.error) {
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error = new Error(result.error.message || "unknown error");
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properties_1.defineReadOnly(error, "code", result.error.code || null);
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properties_1.defineReadOnly(error, "response", data);
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}
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else {
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error = new Error("unknown error");
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}
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request.callback(error, undefined);
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_this.emit("debug", {
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action: "response",
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error: error,
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request: JSON.parse(request.payload),
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provider: _this
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});
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}
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}
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else if (result.method === "eth_subscription") {
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// Subscription...
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var sub = _this._subs[result.params.subscription];
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if (sub) {
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//this.emit.apply(this, );
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sub.processFunc(result.params.result);
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}
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}
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else {
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console.warn("this should not happen");
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}
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};
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// This Provider does not actually poll, but we want to trigger
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// poll events for things that depend on them (like stalling for
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// block and transaction lookups)
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var fauxPoll = setInterval(function () {
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_this.emit("poll");
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}, 1000);
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if (fauxPoll.unref) {
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fauxPoll.unref();
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}
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return _this;
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}
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WebSocketProvider.prototype.detectNetwork = function () {
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return this._detectNetwork;
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};
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Object.defineProperty(WebSocketProvider.prototype, "pollingInterval", {
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get: function () {
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return 0;
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},
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set: function (value) {
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logger.throwError("cannot set polling interval on WebSocketProvider", logger_1.Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "setPollingInterval"
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});
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},
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enumerable: false,
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configurable: true
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});
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WebSocketProvider.prototype.resetEventsBlock = function (blockNumber) {
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logger.throwError("cannot reset events block on WebSocketProvider", logger_1.Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "resetEventBlock"
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});
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};
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WebSocketProvider.prototype.poll = function () {
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return __awaiter(this, void 0, void 0, function () {
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return __generator(this, function (_a) {
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return [2 /*return*/, null];
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});
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});
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};
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Object.defineProperty(WebSocketProvider.prototype, "polling", {
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set: function (value) {
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if (!value) {
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return;
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}
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logger.throwError("cannot set polling on WebSocketProvider", logger_1.Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "setPolling"
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});
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},
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enumerable: false,
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configurable: true
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});
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WebSocketProvider.prototype.send = function (method, params) {
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var _this = this;
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var rid = NextId++;
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return new Promise(function (resolve, reject) {
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function callback(error, result) {
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if (error) {
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return reject(error);
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}
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return resolve(result);
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}
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var payload = JSON.stringify({
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method: method,
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params: params,
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id: rid,
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jsonrpc: "2.0"
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});
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_this.emit("debug", {
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action: "request",
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request: JSON.parse(payload),
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provider: _this
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});
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_this._requests[String(rid)] = { callback: callback, payload: payload };
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if (_this._wsReady) {
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_this._websocket.send(payload);
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}
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});
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};
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WebSocketProvider.defaultUrl = function () {
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return "ws:/\/localhost:8546";
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};
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WebSocketProvider.prototype._subscribe = function (tag, param, processFunc) {
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return __awaiter(this, void 0, void 0, function () {
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var subIdPromise, subId;
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var _this = this;
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return __generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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subIdPromise = this._subIds[tag];
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if (subIdPromise == null) {
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subIdPromise = Promise.all(param).then(function (param) {
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return _this.send("eth_subscribe", param);
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});
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this._subIds[tag] = subIdPromise;
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}
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return [4 /*yield*/, subIdPromise];
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case 1:
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subId = _a.sent();
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this._subs[subId] = { tag: tag, processFunc: processFunc };
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return [2 /*return*/];
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}
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});
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});
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};
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WebSocketProvider.prototype._startEvent = function (event) {
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var _this = this;
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switch (event.type) {
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case "block":
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this._subscribe("block", ["newHeads"], function (result) {
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var blockNumber = bignumber_1.BigNumber.from(result.number).toNumber();
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_this._emitted.block = blockNumber;
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_this.emit("block", blockNumber);
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});
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break;
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case "pending":
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this._subscribe("pending", ["newPendingTransactions"], function (result) {
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_this.emit("pending", result);
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});
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break;
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case "filter":
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this._subscribe(event.tag, ["logs", this._getFilter(event.filter)], function (result) {
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if (result.removed == null) {
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result.removed = false;
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}
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_this.emit(event.filter, _this.formatter.filterLog(result));
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});
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break;
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case "tx": {
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var emitReceipt_1 = function (event) {
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var hash = event.hash;
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_this.getTransactionReceipt(hash).then(function (receipt) {
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if (!receipt) {
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return;
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}
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_this.emit(hash, receipt);
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});
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};
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// In case it is already mined
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emitReceipt_1(event);
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// To keep things simple, we start up a single newHeads subscription
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// to keep an eye out for transactions we are watching for.
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// Starting a subscription for an event (i.e. "tx") that is already
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// running is (basically) a nop.
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this._subscribe("tx", ["newHeads"], function (result) {
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_this._events.filter(function (e) { return (e.type === "tx"); }).forEach(emitReceipt_1);
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});
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break;
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}
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// Nothing is needed
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case "debug":
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case "poll":
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case "willPoll":
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case "didPoll":
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case "error":
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break;
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default:
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console.log("unhandled:", event);
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break;
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}
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};
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WebSocketProvider.prototype._stopEvent = function (event) {
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var _this = this;
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var tag = event.tag;
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if (event.type === "tx") {
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// There are remaining transaction event listeners
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if (this._events.filter(function (e) { return (e.type === "tx"); }).length) {
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return;
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}
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tag = "tx";
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}
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else if (this.listenerCount(event.event)) {
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// There are remaining event listeners
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return;
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}
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var subId = this._subIds[tag];
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if (!subId) {
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return;
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}
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delete this._subIds[tag];
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subId.then(function (subId) {
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if (!_this._subs[subId]) {
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return;
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}
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delete _this._subs[subId];
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_this.send("eth_unsubscribe", [subId]);
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});
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};
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WebSocketProvider.prototype.destroy = function () {
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return __awaiter(this, void 0, void 0, function () {
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var _this = this;
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return __generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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if (!(this._websocket.readyState === ws_1.WebSocket.CONNECTING)) return [3 /*break*/, 2];
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return [4 /*yield*/, (new Promise(function (resolve) {
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_this._websocket.onopen = function () {
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resolve(true);
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};
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_this._websocket.onerror = function () {
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resolve(false);
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};
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}))];
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case 1:
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_a.sent();
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_a.label = 2;
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case 2:
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// Hangup
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// See: https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent#Status_codes
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this._websocket.close(1000);
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return [2 /*return*/];
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}
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});
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});
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};
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return WebSocketProvider;
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}(json_rpc_provider_1.JsonRpcProvider));
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exports.WebSocketProvider = WebSocketProvider;
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//# sourceMappingURL=websocket-provider.js.map
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