1088 lines
39 KiB
JavaScript
1088 lines
39 KiB
JavaScript
// @TODO
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// Event coalescence
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// When we register an event with an async value (e.g. address is a Signer
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// or ENS name), we need to add it immeidately for the Event API, but also
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// need time to resolve the address. Upon resolving the address, we need to
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// migrate the listener to the static event. We also need to maintain a map
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// of Signer/ENS name to address so we can sync respond to listenerCount.
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import { resolveAddress } from "../address/index.js";
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import { concat, dataLength, dataSlice, hexlify, isHexString } from "../utils/data.js";
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import { isCallException } from "../utils/errors.js";
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import { FetchRequest } from "../utils/fetch.js";
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import { toArray, toQuantity } from "../utils/maths.js";
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import { defineProperties, EventPayload, resolveProperties } from "../utils/index.js";
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import { toUtf8String } from "../utils/index.js";
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;
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import { logger } from "../utils/logger.js";
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import { EnsResolver } from "./ens-resolver.js";
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import { Network } from "./network.js";
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import { FeeData } from "./provider.js";
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import { PollingBlockSubscriber, PollingEventSubscriber, PollingOrphanSubscriber, PollingTransactionSubscriber } from "./subscriber-polling.js";
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// Constants
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const BN_2 = BigInt(2);
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const MAX_CCIP_REDIRECTS = 10;
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function getTag(prefix, value) {
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return prefix + ":" + JSON.stringify(value, (k, v) => {
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if (typeof (v) === "bigint") {
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return `bigint:${v.toString()}`;
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}
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if (typeof (v) === "string") {
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return v.toLowerCase();
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}
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// Sort object keys
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if (typeof (v) === "object" && !Array.isArray(v)) {
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const keys = Object.keys(v);
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keys.sort();
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return keys.reduce((accum, key) => {
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accum[key] = v[key];
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return accum;
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}, {});
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}
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return v;
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});
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}
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export class UnmanagedSubscriber {
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name;
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constructor(name) { defineProperties(this, { name }); }
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start() { }
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stop() { }
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pause(dropWhilePaused) { }
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resume() { }
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}
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function copy(value) {
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return JSON.parse(JSON.stringify(value));
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}
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function concisify(items) {
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items = Array.from((new Set(items)).values());
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items.sort();
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return items;
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}
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// Normalize a ProviderEvent into a Subscription
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// @TODO: Make events sync if possible; like block
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//function getSyncSubscription(_event: ProviderEvent): Subscription {
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//}
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async function getSubscription(_event, provider) {
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if (_event == null) {
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throw new Error("invalid event");
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}
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// Normalize topic array info an EventFilter
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if (Array.isArray(_event)) {
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_event = { topics: _event };
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}
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if (typeof (_event) === "string") {
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switch (_event) {
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case "block":
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case "pending":
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case "debug":
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case "network": {
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return { type: _event, tag: _event };
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}
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}
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}
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if (isHexString(_event, 32)) {
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const hash = _event.toLowerCase();
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return { type: "transaction", tag: getTag("tx", { hash }), hash };
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}
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if (_event.orphan) {
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const event = _event;
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// @TODO: Should lowercase and whatnot things here instead of copy...
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return { type: "orphan", tag: getTag("orphan", event), filter: copy(event) };
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}
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if ((_event.address || _event.topics)) {
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const event = _event;
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const filter = {
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topics: ((event.topics || []).map((t) => {
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if (t == null) {
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return null;
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}
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if (Array.isArray(t)) {
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return concisify(t.map((t) => t.toLowerCase()));
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}
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return t.toLowerCase();
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}))
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};
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if (event.address) {
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const addresses = [];
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const promises = [];
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const addAddress = (addr) => {
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if (isHexString(addr)) {
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addresses.push(addr);
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}
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else {
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promises.push((async () => {
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addresses.push(await resolveAddress(addr, provider));
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})());
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}
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};
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if (Array.isArray(event.address)) {
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event.address.forEach(addAddress);
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}
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else {
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addAddress(event.address);
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}
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if (promises.length) {
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await Promise.all(promises);
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}
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filter.address = concisify(addresses.map((a) => a.toLowerCase()));
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}
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return { filter, tag: getTag("event", filter), type: "event" };
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}
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return logger.throwArgumentError("unknown ProviderEvent", "event", _event);
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}
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function getTime() { return (new Date()).getTime(); }
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export function copyRequest(tx) {
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// @TODO: copy the copy from contracts and use it from this
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return tx;
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}
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export class AbstractProvider {
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#subs;
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#plugins;
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// null=unpaused, true=paused+dropWhilePaused, false=paused
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#pausedState;
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#networkPromise;
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#anyNetwork;
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#performCache;
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#nextTimer;
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#timers;
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#disableCcipRead;
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// @TODO: This should be a () => Promise<Network> so network can be
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// done when needed; or rely entirely on _detectNetwork?
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constructor(_network) {
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if (_network === "any") {
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this.#anyNetwork = true;
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this.#networkPromise = null;
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}
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else if (_network) {
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const network = Network.from(_network);
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this.#anyNetwork = false;
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this.#networkPromise = Promise.resolve(network);
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setTimeout(() => { this.emit("network", network, null); }, 0);
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}
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else {
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this.#anyNetwork = false;
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this.#networkPromise = null;
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}
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this.#performCache = new Map();
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this.#subs = new Map();
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this.#plugins = new Map();
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this.#pausedState = null;
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this.#nextTimer = 0;
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this.#timers = new Map();
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this.#disableCcipRead = false;
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}
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get provider() { return this; }
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get plugins() {
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return Array.from(this.#plugins.values());
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}
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attachPlugin(plugin) {
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if (this.#plugins.get(plugin.name)) {
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throw new Error(`cannot replace existing plugin: ${plugin.name} `);
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}
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this.#plugins.set(plugin.name, plugin.validate(this));
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return this;
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}
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getPlugin(name) {
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return (this.#plugins.get(name)) || null;
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}
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set disableCcipRead(value) { this.#disableCcipRead = !!value; }
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get disableCcipRead() { return this.#disableCcipRead; }
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// Shares multiple identical requests made during the same 250ms
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async #perform(req) {
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// Create a tag
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const tag = getTag(req.method, req);
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let perform = this.#performCache.get(tag);
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if (!perform) {
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perform = this._perform(req);
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this.#performCache.set(tag, perform);
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setTimeout(() => {
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if (this.#performCache.get(tag) === perform) {
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this.#performCache.delete(tag);
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}
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}, 250);
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}
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return await perform;
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}
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async ccipReadFetch(tx, calldata, urls) {
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if (this.disableCcipRead || urls.length === 0 || tx.to == null) {
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return null;
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}
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const sender = tx.to.toLowerCase();
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const data = calldata.toLowerCase();
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const errorMessages = [];
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for (let i = 0; i < urls.length; i++) {
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const url = urls[i];
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// URL expansion
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const href = url.replace("{sender}", sender).replace("{data}", data);
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// If no {data} is present, use POST; otherwise GET
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//const json: string | null = (url.indexOf("{data}") >= 0) ? null: JSON.stringify({ data, sender });
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//const result = await fetchJson({ url: href, errorPassThrough: true }, json, (value, response) => {
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// value.status = response.statusCode;
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// return value;
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//});
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const request = new FetchRequest(href);
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if (url.indexOf("{data}") === -1) {
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request.body = { data, sender };
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}
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let errorMessage = "unknown error";
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const resp = await request.send();
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try {
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const result = resp.bodyJson;
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if (result.data) {
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return result.data;
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}
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if (result.message) {
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errorMessage = result.message;
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}
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}
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catch (error) { }
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// 4xx indicates the result is not present; stop
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if (resp.statusCode >= 400 && resp.statusCode < 500) {
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return logger.throwError(`response not found during CCIP fetch: ${errorMessage}`, "OFFCHAIN_FAULT", {
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reason: "404_MISSING_RESOURCE",
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transaction: tx, info: { url, errorMessage }
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});
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}
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// 5xx indicates server issue; try the next url
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errorMessages.push(errorMessage);
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}
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return logger.throwError(`error encountered during CCIP fetch: ${errorMessages.map((m) => JSON.stringify(m)).join(", ")}`, "OFFCHAIN_FAULT", {
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reason: "500_SERVER_ERROR",
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transaction: tx, info: { urls, errorMessages }
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});
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}
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_wrapTransaction(tx, hash, blockNumber) {
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return tx;
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}
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_detectNetwork() {
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return logger.throwError("sub-classes must implement this", "UNSUPPORTED_OPERATION", {
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operation: "_detectNetwork"
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});
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}
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// Sub-classes should override this and handle PerformActionRequest requests, calling
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// the super for any unhandled actions.
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async _perform(req) {
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return logger.throwError(`unsupported method: ${req.method}`, "UNSUPPORTED_OPERATION", {
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operation: req.method,
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info: req
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});
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}
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// State
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async getBlockNumber() {
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return logger.getNumber(await this.#perform({ method: "getBlockNumber" }), "%response");
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}
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// @TODO: Make this string | Promsie<string> so no await needed if sync is possible
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_getAddress(address) {
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return resolveAddress(address, this);
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/*
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if (typeof(address) === "string") {
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if (address.match(/^0x[0-9a-f]+$/i)) { return address; }
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const resolved = await this.resolveName(address);
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if (resolved == null) { throw new Error("not confiugred @TODO"); }
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return resolved;
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}
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return address.getAddress();
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*/
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}
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_getBlockTag(blockTag) {
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if (blockTag == null) {
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return "latest";
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}
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switch (blockTag) {
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case "earliest":
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return "0x0";
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case "latest":
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case "pending":
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case "safe":
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case "finalized":
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return blockTag;
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}
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if (isHexString(blockTag)) {
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if (dataLength(blockTag) === 32) {
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return blockTag;
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}
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return toQuantity(blockTag);
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}
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if (typeof (blockTag) === "number") {
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if (blockTag >= 0) {
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return toQuantity(blockTag);
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}
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return this.getBlockNumber().then((b) => toQuantity(b + blockTag));
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}
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return logger.throwArgumentError("invalid blockTag", "blockTag", blockTag);
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}
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async getNetwork() {
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// No explicit network was set and this is our first time
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if (this.#networkPromise == null) {
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// Detect the current network (shared with all calls)
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const detectNetwork = this._detectNetwork().then((network) => {
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this.emit("network", network, null);
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return network;
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}, (error) => {
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// Reset the networkPromise on failure, so we will try again
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if (this.#networkPromise === detectNetwork) {
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this.#networkPromise = null;
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}
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throw error;
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});
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this.#networkPromise = detectNetwork;
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return await detectNetwork;
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}
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const networkPromise = this.#networkPromise;
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const [expected, actual] = await Promise.all([
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networkPromise,
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this._detectNetwork() // The actual connected network
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]);
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if (expected.chainId !== actual.chainId) {
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if (this.#anyNetwork) {
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// The "any" network can change, so notify listeners
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this.emit("network", actual, expected);
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// Update the network if something else hasn't already changed it
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if (this.#networkPromise === networkPromise) {
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this.#networkPromise = Promise.resolve(actual);
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}
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}
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else {
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// Otherwise, we do not allow changes to the underlying network
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logger.throwError(`network changed: ${expected.chainId} => ${actual.chainId} `, "NETWORK_ERROR", {
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event: "changed"
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});
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}
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}
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return expected.clone().freeze();
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}
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async getFeeData() {
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const { block, gasPrice } = await resolveProperties({
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block: this.getBlock("latest"),
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gasPrice: ((async () => {
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try {
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const gasPrice = await this.#perform({ method: "getGasPrice" });
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return logger.getBigInt(gasPrice, "%response");
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}
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catch (error) { }
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return null;
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})())
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});
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let maxFeePerGas = null, maxPriorityFeePerGas = null;
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if (block && block.baseFeePerGas) {
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// We may want to compute this more accurately in the future,
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// using the formula "check if the base fee is correct".
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// See: https://eips.ethereum.org/EIPS/eip-1559
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maxPriorityFeePerGas = BigInt("1500000000");
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// Allow a network to override their maximum priority fee per gas
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//const priorityFeePlugin = (await this.getNetwork()).getPlugin<MaxPriorityFeePlugin>("org.ethers.plugins.max-priority-fee");
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//if (priorityFeePlugin) {
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// maxPriorityFeePerGas = await priorityFeePlugin.getPriorityFee(this);
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//}
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maxFeePerGas = (block.baseFeePerGas * BN_2) + maxPriorityFeePerGas;
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}
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return new FeeData(gasPrice, maxFeePerGas, maxPriorityFeePerGas);
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}
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async _getTransaction(_request) {
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const network = await this.getNetwork();
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// Fill in any addresses
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const request = Object.assign({}, _request, await resolveProperties({
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to: (_request.to ? resolveAddress(_request.to, this) : undefined),
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from: (_request.from ? resolveAddress(_request.from, this) : undefined),
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}));
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return network.formatter.transactionRequest(request);
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}
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async estimateGas(_tx) {
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const transaction = await this._getTransaction(_tx);
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return logger.getBigInt(await this.#perform({
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method: "estimateGas", transaction
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}), "%response");
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}
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async #call(tx, blockTag, attempt) {
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if (attempt >= MAX_CCIP_REDIRECTS) {
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logger.throwError("CCIP read exceeded maximum redirections", "OFFCHAIN_FAULT", {
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reason: "TOO_MANY_REDIRECTS",
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transaction: Object.assign({}, tx, { blockTag, enableCcipRead: true })
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});
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}
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const transaction = copyRequest(tx);
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try {
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return hexlify(await this._perform({ method: "call", transaction, blockTag }));
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}
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catch (error) {
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// CCIP Read OffchainLookup
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if (!this.disableCcipRead && isCallException(error) && attempt >= 0 && blockTag === "latest" && transaction.to != null && dataSlice(error.data, 0, 4) === "0x556f1830") {
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const data = error.data;
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const txSender = await resolveAddress(transaction.to, this);
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// Parse the CCIP Read Arguments
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let ccipArgs;
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try {
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ccipArgs = parseOffchainLookup(dataSlice(error.data, 4));
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}
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catch (error) {
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return logger.throwError(error.message, "OFFCHAIN_FAULT", {
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reason: "BAD_DATA",
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transaction, info: { data }
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});
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}
|
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// Check the sender of the OffchainLookup matches the transaction
|
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if (ccipArgs.sender.toLowerCase() !== txSender.toLowerCase()) {
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return logger.throwError("CCIP Read sender mismatch", "CALL_EXCEPTION", {
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data, transaction,
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errorSignature: "OffchainLookup(address,string[],bytes,bytes4,bytes)",
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errorName: "OffchainLookup",
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errorArgs: ccipArgs.errorArgs
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});
|
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}
|
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const ccipResult = await this.ccipReadFetch(transaction, ccipArgs.calldata, ccipArgs.urls);
|
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if (ccipResult == null) {
|
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return logger.throwError("CCIP Read failed to fetch data", "OFFCHAIN_FAULT", {
|
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reason: "FETCH_FAILED",
|
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transaction, info: { data: error.data, errorArgs: ccipArgs.errorArgs }
|
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});
|
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}
|
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return this.#call({
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to: txSender,
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data: concat([
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ccipArgs.selector, encodeBytes([ccipResult, ccipArgs.extraData])
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]),
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}, blockTag, attempt + 1);
|
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}
|
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throw error;
|
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}
|
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}
|
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async call(_tx) {
|
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const [tx, blockTag] = await Promise.all([
|
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this._getTransaction(_tx), this._getBlockTag(_tx.blockTag)
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]);
|
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return this.#call(tx, blockTag, _tx.enableCcipRead ? 0 : -1);
|
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}
|
|
// Account
|
|
async #getAccountValue(request, _address, _blockTag) {
|
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let address = this._getAddress(_address);
|
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let blockTag = this._getBlockTag(_blockTag);
|
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if (typeof (address) !== "string" || typeof (blockTag) !== "string") {
|
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[address, blockTag] = await Promise.all([address, blockTag]);
|
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}
|
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return await this.#perform(Object.assign(request, { address, blockTag }));
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}
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async getBalance(address, blockTag) {
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return logger.getBigInt(await this.#getAccountValue({ method: "getBalance" }, address, blockTag), "%response");
|
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}
|
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async getTransactionCount(address, blockTag) {
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return logger.getNumber(await this.#getAccountValue({ method: "getTransactionCount" }, address, blockTag), "%response");
|
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}
|
|
async getCode(address, blockTag) {
|
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return hexlify(await this.#getAccountValue({ method: "getCode" }, address, blockTag));
|
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}
|
|
async getStorageAt(address, _position, blockTag) {
|
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const position = logger.getBigInt(_position, "position");
|
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return hexlify(await this.#getAccountValue({ method: "getStorageAt", position }, address, blockTag));
|
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}
|
|
// Write
|
|
async broadcastTransaction(signedTx) {
|
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throw new Error();
|
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return {};
|
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}
|
|
async #getBlock(block, includeTransactions) {
|
|
if (isHexString(block, 32)) {
|
|
return await this.#perform({
|
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method: "getBlock", blockHash: block, includeTransactions
|
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});
|
|
}
|
|
let blockTag = this._getBlockTag(block);
|
|
if (typeof (blockTag) !== "string") {
|
|
blockTag = await blockTag;
|
|
}
|
|
return await this.#perform({
|
|
method: "getBlock", blockTag, includeTransactions
|
|
});
|
|
}
|
|
// Queries
|
|
async getBlock(block) {
|
|
const [network, params] = await Promise.all([
|
|
this.getNetwork(), this.#getBlock(block, false)
|
|
]);
|
|
if (params == null) {
|
|
return null;
|
|
}
|
|
return network.formatter.block(params, this);
|
|
}
|
|
async getBlockWithTransactions(block) {
|
|
const format = (await this.getNetwork()).formatter;
|
|
const params = this.#getBlock(block, true);
|
|
if (params == null) {
|
|
return null;
|
|
}
|
|
return format.blockWithTransactions(params, this);
|
|
}
|
|
async getTransaction(hash) {
|
|
const format = (await this.getNetwork()).formatter;
|
|
const params = await this.#perform({ method: "getTransaction", hash });
|
|
return format.transactionResponse(params, this);
|
|
}
|
|
async getTransactionReceipt(hash) {
|
|
const format = (await this.getNetwork()).formatter;
|
|
const receipt = await this.#perform({ method: "getTransactionReceipt", hash });
|
|
if (receipt == null) {
|
|
return null;
|
|
}
|
|
// Some backends did not backfill the effectiveGasPrice into old transactions
|
|
// in the receipt, so we look it up manually and inject it.
|
|
if (receipt.gasPrice == null && receipt.effectiveGasPrice == null) {
|
|
const tx = await this.#perform({ method: "getTransaction", hash });
|
|
receipt.effectiveGasPrice = tx.gasPrice;
|
|
}
|
|
return format.receipt(receipt, this);
|
|
}
|
|
async getTransactionResult(hash) {
|
|
const result = await this.#perform({ method: "getTransactionResult", hash });
|
|
if (result == null) {
|
|
return null;
|
|
}
|
|
return hexlify(result);
|
|
}
|
|
_getFilter(filter) {
|
|
// Create a canonical representation of the topics
|
|
const topics = (filter.topics || []).map((t) => {
|
|
if (t == null) {
|
|
return null;
|
|
}
|
|
if (Array.isArray(t)) {
|
|
return concisify(t.map((t) => t.toLowerCase()));
|
|
}
|
|
return t.toLowerCase();
|
|
});
|
|
const blockHash = ("blockHash" in filter) ? filter.blockHash : undefined;
|
|
const resolve = (_address, fromBlock, toBlock) => {
|
|
let address = undefined;
|
|
switch (_address.length) {
|
|
case 0: break;
|
|
case 1:
|
|
address = _address[0];
|
|
break;
|
|
default:
|
|
_address.sort();
|
|
address = _address;
|
|
}
|
|
if (blockHash) {
|
|
if (fromBlock != null || toBlock != null) {
|
|
throw new Error("invalid filter");
|
|
}
|
|
}
|
|
const filter = {};
|
|
if (address) {
|
|
filter.address = address;
|
|
}
|
|
if (topics.length) {
|
|
filter.topics = topics;
|
|
}
|
|
if (fromBlock) {
|
|
filter.fromBlock = fromBlock;
|
|
}
|
|
if (toBlock) {
|
|
filter.toBlock = toBlock;
|
|
}
|
|
if (blockHash) {
|
|
filter.blockHash = blockHash;
|
|
}
|
|
return filter;
|
|
};
|
|
// Addresses could be async (ENS names or Addressables)
|
|
let address = [];
|
|
if (filter.address) {
|
|
if (Array.isArray(filter.address)) {
|
|
for (const addr of filter.address) {
|
|
address.push(this._getAddress(addr));
|
|
}
|
|
}
|
|
else {
|
|
address.push(this._getAddress(filter.address));
|
|
}
|
|
}
|
|
let fromBlock = undefined;
|
|
if ("fromBlock" in filter) {
|
|
fromBlock = this._getBlockTag(filter.fromBlock);
|
|
}
|
|
let toBlock = undefined;
|
|
if ("toBlock" in filter) {
|
|
toBlock = this._getBlockTag(filter.toBlock);
|
|
}
|
|
if (address.filter((a) => (typeof (a) !== "string")).length ||
|
|
(fromBlock != null && typeof (fromBlock) !== "string") ||
|
|
(toBlock != null && typeof (toBlock) !== "string")) {
|
|
return Promise.all([Promise.all(address), fromBlock, toBlock]).then((result) => {
|
|
return resolve(result[0], result[1], result[2]);
|
|
});
|
|
}
|
|
return resolve(address, fromBlock, toBlock);
|
|
}
|
|
// Bloom-filter Queries
|
|
async getLogs(_filter) {
|
|
const { network, filter } = await resolveProperties({
|
|
network: this.getNetwork(),
|
|
filter: this._getFilter(_filter)
|
|
});
|
|
return (await this.#perform({ method: "getLogs", filter })).map((l) => {
|
|
return network.formatter.log(l, this);
|
|
});
|
|
}
|
|
// ENS
|
|
_getProvider(chainId) {
|
|
return logger.throwError("provider cannot connect to target network", "UNSUPPORTED_OPERATION", {
|
|
operation: "_getProvider()"
|
|
});
|
|
}
|
|
async getResolver(name) {
|
|
return await EnsResolver.fromName(this, name);
|
|
}
|
|
async getAvatar(name) {
|
|
const resolver = await this.getResolver(name);
|
|
if (resolver) {
|
|
return await resolver.getAvatar();
|
|
}
|
|
return null;
|
|
}
|
|
async resolveName(name) {
|
|
//if (typeof(name) === "string") {
|
|
const resolver = await this.getResolver(name);
|
|
if (resolver) {
|
|
return await resolver.getAddress();
|
|
}
|
|
/*
|
|
} else {
|
|
const address = await name.getAddress();
|
|
if (address == null) {
|
|
return logger.throwArgumentError("Addressable returned no address", "name", name);
|
|
}
|
|
return address;
|
|
}
|
|
*/
|
|
return null;
|
|
}
|
|
async lookupAddress(address) {
|
|
throw new Error();
|
|
//return "TODO";
|
|
}
|
|
async waitForTransaction(hash, confirms = 1, timeout) {
|
|
if (confirms === 0) {
|
|
return this.getTransactionReceipt(hash);
|
|
}
|
|
return new Promise(async (resolve, reject) => {
|
|
let timer = null;
|
|
const listener = (async (blockNumber) => {
|
|
try {
|
|
const receipt = await this.getTransactionReceipt(hash);
|
|
if (receipt != null) {
|
|
if (blockNumber - receipt.blockNumber + 1 >= confirms) {
|
|
resolve(receipt);
|
|
this.off("block", listener);
|
|
if (timer) {
|
|
clearTimeout(timer);
|
|
timer = null;
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
catch (error) {
|
|
console.log("EEE", error);
|
|
}
|
|
this.once("block", listener);
|
|
});
|
|
if (timeout != null) {
|
|
timer = setTimeout(() => {
|
|
if (timer == null) {
|
|
return;
|
|
}
|
|
timer = null;
|
|
this.off("block", listener);
|
|
reject(logger.makeError("timeout", "TIMEOUT", { reason: "timeout" }));
|
|
}, timeout);
|
|
}
|
|
listener(await this.getBlockNumber());
|
|
});
|
|
}
|
|
async waitForBlock(blockTag) {
|
|
throw new Error();
|
|
//return new Block(<any><unknown>{ }, this);
|
|
}
|
|
_clearTimeout(timerId) {
|
|
const timer = this.#timers.get(timerId);
|
|
if (!timer) {
|
|
return;
|
|
}
|
|
if (timer.timer) {
|
|
clearTimeout(timer.timer);
|
|
}
|
|
this.#timers.delete(timerId);
|
|
}
|
|
_setTimeout(_func, timeout = 0) {
|
|
const timerId = this.#nextTimer++;
|
|
const func = () => {
|
|
this.#timers.delete(timerId);
|
|
_func();
|
|
};
|
|
if (this.paused) {
|
|
this.#timers.set(timerId, { timer: null, func, time: timeout });
|
|
}
|
|
else {
|
|
const timer = setTimeout(func, timeout);
|
|
this.#timers.set(timerId, { timer, func, time: getTime() });
|
|
}
|
|
return timerId;
|
|
}
|
|
_forEachSubscriber(func) {
|
|
for (const sub of this.#subs.values()) {
|
|
func(sub.subscriber);
|
|
}
|
|
}
|
|
// Event API; sub-classes should override this; any supported
|
|
// event filter will have been munged into an EventFilter
|
|
_getSubscriber(sub) {
|
|
switch (sub.type) {
|
|
case "debug":
|
|
case "network":
|
|
return new UnmanagedSubscriber(sub.type);
|
|
case "block":
|
|
return new PollingBlockSubscriber(this);
|
|
case "event":
|
|
return new PollingEventSubscriber(this, sub.filter);
|
|
case "transaction":
|
|
return new PollingTransactionSubscriber(this, sub.hash);
|
|
case "orphan":
|
|
return new PollingOrphanSubscriber(this, sub.filter);
|
|
}
|
|
throw new Error(`unsupported event: ${sub.type}`);
|
|
}
|
|
_recoverSubscriber(oldSub, newSub) {
|
|
for (const sub of this.#subs.values()) {
|
|
if (sub.subscriber === oldSub) {
|
|
if (sub.started) {
|
|
sub.subscriber.stop();
|
|
}
|
|
sub.subscriber = newSub;
|
|
if (sub.started) {
|
|
newSub.start();
|
|
}
|
|
if (this.#pausedState != null) {
|
|
newSub.pause(this.#pausedState);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
async #hasSub(event, emitArgs) {
|
|
let sub = await getSubscription(event, this);
|
|
// This is a log that is removing an existing log; we actually want
|
|
// to emit an orphan event for the removed log
|
|
if (sub.type === "event" && emitArgs && emitArgs.length > 0 && emitArgs[0].removed === true) {
|
|
sub = await getSubscription({ orphan: "drop-log", log: emitArgs[0] }, this);
|
|
}
|
|
return this.#subs.get(sub.tag) || null;
|
|
}
|
|
async #getSub(event) {
|
|
const subscription = await getSubscription(event, this);
|
|
// Prevent tampering with our tag in any subclass' _getSubscriber
|
|
const tag = subscription.tag;
|
|
let sub = this.#subs.get(tag);
|
|
if (!sub) {
|
|
const subscriber = this._getSubscriber(subscription);
|
|
const addressableMap = new WeakMap();
|
|
const nameMap = new Map();
|
|
sub = { subscriber, tag, addressableMap, nameMap, started: false, listeners: [] };
|
|
this.#subs.set(tag, sub);
|
|
}
|
|
return sub;
|
|
}
|
|
async on(event, listener) {
|
|
const sub = await this.#getSub(event);
|
|
sub.listeners.push({ listener, once: false });
|
|
if (!sub.started) {
|
|
sub.subscriber.start();
|
|
sub.started = true;
|
|
if (this.#pausedState != null) {
|
|
sub.subscriber.pause(this.#pausedState);
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
async once(event, listener) {
|
|
const sub = await this.#getSub(event);
|
|
sub.listeners.push({ listener, once: true });
|
|
if (!sub.started) {
|
|
sub.subscriber.start();
|
|
sub.started = true;
|
|
if (this.#pausedState != null) {
|
|
sub.subscriber.pause(this.#pausedState);
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
async emit(event, ...args) {
|
|
const sub = await this.#hasSub(event, args);
|
|
if (!sub) {
|
|
return false;
|
|
}
|
|
;
|
|
const count = sub.listeners.length;
|
|
sub.listeners = sub.listeners.filter(({ listener, once }) => {
|
|
const payload = new EventPayload(this, (once ? null : listener), event);
|
|
try {
|
|
listener.call(this, ...args, payload);
|
|
}
|
|
catch (error) { }
|
|
return !once;
|
|
});
|
|
return (count > 0);
|
|
}
|
|
async listenerCount(event) {
|
|
if (event) {
|
|
const sub = await this.#hasSub(event);
|
|
if (!sub) {
|
|
return 0;
|
|
}
|
|
return sub.listeners.length;
|
|
}
|
|
let total = 0;
|
|
for (const { listeners } of this.#subs.values()) {
|
|
total += listeners.length;
|
|
}
|
|
return total;
|
|
}
|
|
async listeners(event) {
|
|
if (event) {
|
|
const sub = await this.#hasSub(event);
|
|
if (!sub) {
|
|
return [];
|
|
}
|
|
return sub.listeners.map(({ listener }) => listener);
|
|
}
|
|
let result = [];
|
|
for (const { listeners } of this.#subs.values()) {
|
|
result = result.concat(listeners.map(({ listener }) => listener));
|
|
}
|
|
return result;
|
|
}
|
|
async off(event, listener) {
|
|
const sub = await this.#hasSub(event);
|
|
if (!sub) {
|
|
return this;
|
|
}
|
|
if (listener) {
|
|
const index = sub.listeners.map(({ listener }) => listener).indexOf(listener);
|
|
if (index >= 0) {
|
|
sub.listeners.splice(index, 1);
|
|
}
|
|
}
|
|
if (!listener || sub.listeners.length === 0) {
|
|
if (sub.started) {
|
|
sub.subscriber.stop();
|
|
}
|
|
this.#subs.delete(sub.tag);
|
|
}
|
|
return this;
|
|
}
|
|
async removeAllListeners(event) {
|
|
if (event) {
|
|
const { tag, started, subscriber } = await this.#getSub(event);
|
|
if (started) {
|
|
subscriber.stop();
|
|
}
|
|
this.#subs.delete(tag);
|
|
}
|
|
else {
|
|
for (const [tag, { started, subscriber }] of this.#subs) {
|
|
if (started) {
|
|
subscriber.stop();
|
|
}
|
|
this.#subs.delete(tag);
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
// Alias for "on"
|
|
async addListener(event, listener) {
|
|
return await this.on(event, listener);
|
|
}
|
|
// Alias for "off"
|
|
async removeListener(event, listener) {
|
|
return this.off(event, listener);
|
|
}
|
|
// Sub-classes should override this to shutdown any sockets, etc.
|
|
// but MUST call this super.shutdown.
|
|
async shutdown() {
|
|
// Stop all listeners
|
|
this.removeAllListeners();
|
|
// Shut down all tiemrs
|
|
for (const timerId of this.#timers.keys()) {
|
|
this._clearTimeout(timerId);
|
|
}
|
|
}
|
|
get paused() { return (this.#pausedState != null); }
|
|
set paused(pause) {
|
|
if (!!pause === this.paused) {
|
|
return;
|
|
}
|
|
if (this.paused) {
|
|
this.resume();
|
|
}
|
|
else {
|
|
this.pause(false);
|
|
}
|
|
}
|
|
pause(dropWhilePaused) {
|
|
if (this.#pausedState != null) {
|
|
if (this.#pausedState == !!dropWhilePaused) {
|
|
return;
|
|
}
|
|
return logger.throwError("cannot change pause type; resume first", "UNSUPPORTED_OPERATION", {
|
|
operation: "pause"
|
|
});
|
|
}
|
|
this._forEachSubscriber((s) => s.pause(dropWhilePaused));
|
|
this.#pausedState = !!dropWhilePaused;
|
|
for (const timer of this.#timers.values()) {
|
|
// Clear the timer
|
|
if (timer.timer) {
|
|
clearTimeout(timer.timer);
|
|
}
|
|
// Remaining time needed for when we become unpaused
|
|
timer.time = getTime() - timer.time;
|
|
}
|
|
}
|
|
resume() {
|
|
if (this.#pausedState == null) {
|
|
return;
|
|
}
|
|
this._forEachSubscriber((s) => s.resume());
|
|
this.#pausedState = null;
|
|
for (const timer of this.#timers.values()) {
|
|
// Remaining time when we were paused
|
|
let timeout = timer.time;
|
|
if (timeout < 0) {
|
|
timeout = 0;
|
|
}
|
|
// Start time (in cause paused, so we con compute remaininf time)
|
|
timer.time = getTime();
|
|
// Start the timer
|
|
setTimeout(timer.func, timeout);
|
|
}
|
|
}
|
|
}
|
|
function _parseString(result, start) {
|
|
try {
|
|
const bytes = _parseBytes(result, start);
|
|
if (bytes) {
|
|
return toUtf8String(bytes);
|
|
}
|
|
}
|
|
catch (error) { }
|
|
return null;
|
|
}
|
|
function _parseBytes(result, start) {
|
|
if (result === "0x") {
|
|
return null;
|
|
}
|
|
try {
|
|
const offset = logger.getNumber(dataSlice(result, start, start + 32));
|
|
const length = logger.getNumber(dataSlice(result, offset, offset + 32));
|
|
return dataSlice(result, offset + 32, offset + 32 + length);
|
|
}
|
|
catch (error) { }
|
|
return null;
|
|
}
|
|
function numPad(value) {
|
|
const result = toArray(value);
|
|
if (result.length > 32) {
|
|
throw new Error("internal; should not happen");
|
|
}
|
|
const padded = new Uint8Array(32);
|
|
padded.set(result, 32 - result.length);
|
|
return padded;
|
|
}
|
|
function bytesPad(value) {
|
|
if ((value.length % 32) === 0) {
|
|
return value;
|
|
}
|
|
const result = new Uint8Array(Math.ceil(value.length / 32) * 32);
|
|
result.set(value);
|
|
return result;
|
|
}
|
|
const empty = new Uint8Array([]);
|
|
// ABI Encodes a series of (bytes, bytes, ...)
|
|
function encodeBytes(datas) {
|
|
const result = [];
|
|
let byteCount = 0;
|
|
// Add place-holders for pointers as we add items
|
|
for (let i = 0; i < datas.length; i++) {
|
|
result.push(empty);
|
|
byteCount += 32;
|
|
}
|
|
for (let i = 0; i < datas.length; i++) {
|
|
const data = logger.getBytes(datas[i]);
|
|
// Update the bytes offset
|
|
result[i] = numPad(byteCount);
|
|
// The length and padded value of data
|
|
result.push(numPad(data.length));
|
|
result.push(bytesPad(data));
|
|
byteCount += 32 + Math.ceil(data.length / 32) * 32;
|
|
}
|
|
return concat(result);
|
|
}
|
|
const zeros = "0x0000000000000000000000000000000000000000000000000000000000000000";
|
|
function parseOffchainLookup(data) {
|
|
const result = {
|
|
sender: "", urls: [], calldata: "", selector: "", extraData: "", errorArgs: []
|
|
};
|
|
if (dataLength(data) < 5 * 32) {
|
|
throw new Error("insufficient OffchainLookup data");
|
|
}
|
|
const sender = dataSlice(data, 0, 32);
|
|
if (dataSlice(sender, 0, 12) !== dataSlice(zeros, 0, 12)) {
|
|
throw new Error("corrupt OffchainLookup sender");
|
|
}
|
|
result.sender = dataSlice(sender, 12);
|
|
// Read the URLs from the response
|
|
try {
|
|
const urls = [];
|
|
const urlsOffset = logger.getNumber(dataSlice(data, 32, 64));
|
|
const urlsLength = logger.getNumber(dataSlice(data, urlsOffset, urlsOffset + 32));
|
|
const urlsData = dataSlice(data, urlsOffset + 32);
|
|
for (let u = 0; u < urlsLength; u++) {
|
|
const url = _parseString(urlsData, u * 32);
|
|
if (url == null) {
|
|
throw new Error("abort");
|
|
}
|
|
urls.push(url);
|
|
}
|
|
result.urls = urls;
|
|
}
|
|
catch (error) {
|
|
throw new Error("corrupt OffchainLookup urls");
|
|
}
|
|
// Get the CCIP calldata to forward
|
|
try {
|
|
const calldata = _parseBytes(data, 64);
|
|
if (calldata == null) {
|
|
throw new Error("abort");
|
|
}
|
|
result.calldata = calldata;
|
|
}
|
|
catch (error) {
|
|
throw new Error("corrupt OffchainLookup calldata");
|
|
}
|
|
// Get the callbackSelector (bytes4)
|
|
if (dataSlice(data, 100, 128) !== dataSlice(zeros, 0, 28)) {
|
|
throw new Error("corrupt OffchainLookup callbaackSelector");
|
|
}
|
|
result.selector = dataSlice(data, 96, 100);
|
|
// Get the extra data to send back to the contract as context
|
|
try {
|
|
const extraData = _parseBytes(data, 128);
|
|
if (extraData == null) {
|
|
throw new Error("abort");
|
|
}
|
|
result.extraData = extraData;
|
|
}
|
|
catch (error) {
|
|
throw new Error("corrupt OffchainLookup extraData");
|
|
}
|
|
result.errorArgs = "sender,urls,calldata,selector,extraData".split(/,/).map((k) => result[k]);
|
|
return result;
|
|
}
|
|
//# sourceMappingURL=abstract-provider.js.map
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