*refactor rpc to use new swarm based p2p
*remove wisdom query for now
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11
README.md
11
README.md
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@ -1,10 +1 @@
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# dht-rpc-client
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A client library that uses hypercore and the https://github.com/LumeWeb/relay server along with Skynet for web, to perform `Wisdom of the crowd` RPC requests.
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This enables access to blockchain RPC without running a node, and socializes the cost of access to RPC from use of services such as https://pokt.network
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As demand grows for users, so should the community. It is expected that both businesses operating on web3 and community members donating/supporting in altruism will ensure the upkeep of this dht.
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It is the projects hope that blockchains will evolve in the future such that much of this infrastructure becomes unneeded and RPC can be done directly with light clients. This would also need to support over Websockets like how Webtorrent works.
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As very few blockchains actually support this and for use with decentralized nodes, this type of dht/technology is required for mainstream adoption.
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# rpc-client
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@ -20,8 +20,11 @@
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"@hyperswarm/dht": "^6.0.1",
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"@lumeweb/rpc": "git+https://git.lumeweb.com/LumeWeb/rpc.git",
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"b4a": "^1.6.1",
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"hypercore-crypto": "^3.3.1",
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"hyperswarm": "^4.3.7",
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"json-stringify-deterministic": "^1.0.7",
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"libskynet": "^0.0.61",
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"msgpackr": "^1.6.1"
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"msgpackr": "^1.6.1",
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"sodium-universal": "^4.0.0"
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}
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}
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@ -1,3 +1 @@
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export const ERR_MAX_TRIES_HIT = "ERR_MAX_TRIES_HIT";
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export const ERR_INVALID_SIGNATURE = "INVALID_SIGNATURE";
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export const ERR_NO_RELAYS = "NO_RELAYS";
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102
src/network.ts
102
src/network.ts
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@ -1,10 +1,21 @@
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// @ts-ignore
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import DHT from "@hyperswarm/dht";
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import Hyperswarm from "hyperswarm";
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import RpcNetworkQueryFactory from "./query/index.js";
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import b4a from "b4a";
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import { createHash } from "./util.js";
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export default class RpcNetwork {
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constructor(dht = new DHT()) {
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this._dht = dht;
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private _relaysAvailablePromise?: Promise<void>;
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private _relaysAvailableResolve?: Function;
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constructor(swarm = new Hyperswarm()) {
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this._swarm = swarm;
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this.init();
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}
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private _methods: Map<string, Set<string>> = new Map<string, Set<string>>();
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get methods(): Map<string, Set<string>> {
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return this._methods;
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}
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private _factory = new RpcNetworkQueryFactory(this);
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@ -13,10 +24,10 @@ export default class RpcNetwork {
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return this._factory;
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}
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private _dht: typeof DHT;
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private _swarm: typeof Hyperswarm;
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get dht() {
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return this._dht;
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get swarm() {
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return this._swarm;
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}
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private _majorityThreshold = 0.75;
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@ -49,9 +60,9 @@ export default class RpcNetwork {
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this._relayTimeout = value;
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}
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private _relays: string[] = [];
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private _relays: Map<string, any> = new Map<string, string[]>();
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get relays(): string[] {
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get relays(): Map<string, string[]> {
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return this._relays;
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}
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@ -59,12 +70,16 @@ export default class RpcNetwork {
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get ready(): Promise<void> {
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if (!this._ready) {
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this._ready = this._dht.ready() as Promise<void>;
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this._ready = this._swarm.dht.ready() as Promise<void>;
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}
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return this._ready;
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}
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get readyWithRelays(): Promise<void> {
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return this.ready.then(() => this._relaysAvailablePromise);
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}
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private _bypassCache: boolean = false;
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get bypassCache(): boolean {
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@ -75,33 +90,70 @@ export default class RpcNetwork {
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this._bypassCache = value;
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}
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private _maxRelays: number = 0;
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public getAvailableRelay(module: string, method: string) {
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method = `${module}.${method}`;
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get maxRelays(): number {
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return this._maxRelays;
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let relays = this._methods.get(method) ?? new Set();
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if (!relays.size) {
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throw Error("no available relay");
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}
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set maxRelays(value: number) {
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this._maxRelays = value;
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return Array.from(relays)[Math.floor(Math.random() * relays.size)];
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}
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public addRelay(pubkey: string): void {
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this._relays.push(pubkey);
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this._relays = [...new Set(this._relays)];
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public getRelay(pubkey: string) {
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if (this._relays.has(pubkey)) {
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return this._relays.get(pubkey);
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}
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public removeRelay(pubkey: string): boolean {
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if (!this._relays.includes(pubkey)) {
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return false;
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return undefined;
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}
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delete this._relays[this._relays.indexOf(pubkey)];
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this._relays = Object.values(this._relays);
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private init() {
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this._swarm.join(createHash("lumeweb"));
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this.setupRelayPromise();
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return true;
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this._swarm.on("connection", async (relay: any) => {
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const query = this._factory.simple({
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relay,
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query: { module: "core", method: "get_methods", data: null },
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});
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const resp = await query.result;
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const pubkey = b4a.from(relay.remotePublicKey).toString("hex");
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if (resp.data) {
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this._relays.set(pubkey, relay);
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(resp.data as string[]).forEach((item) => {
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const methods: Set<string> =
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this._methods.get(item) ?? new Set<string>();
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methods.add(pubkey);
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this._methods.set(item, methods);
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});
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this._relaysAvailableResolve?.();
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}
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public clearRelays(): void {
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this._relays = [];
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relay.on("close", () => {
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this._methods.forEach((item) => {
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if (item.has(pubkey)) {
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item.delete(pubkey);
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}
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});
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this.relays.delete(pubkey);
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if (!this._relays.size) {
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this.setupRelayPromise();
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}
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});
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});
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}
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private setupRelayPromise() {
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this._relaysAvailablePromise = new Promise<void>((resolve) => {
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this._relaysAvailableResolve = resolve;
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});
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}
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}
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@ -20,11 +20,15 @@ export default abstract class RpcQueryBase {
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protected _error?: string;
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protected _promiseResolve?: (data: any) => void;
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constructor(
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network: RpcNetwork,
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query: ClientRPCRequest | RPCRequest,
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options: RpcQueryOptions = {}
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) {
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constructor({
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network,
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query,
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options = {},
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}: {
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network: RpcNetwork;
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query: ClientRPCRequest | RPCRequest;
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options: RpcQueryOptions;
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}) {
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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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@ -2,24 +2,27 @@ import RpcNetwork from "../network.js";
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import { RPCBroadcastRequest, RPCRequest } from "@lumeweb/relay-types";
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import { RpcQueryOptions } from "../types.js";
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import { hashQuery } from "../util.js";
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import { getActiveRelay, setupRelay } from "../sharedRelay.js";
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import SimpleRpcQuery from "./simple.js";
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export default class ClearCacheRpcQuery extends SimpleRpcQuery {
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protected _relays: string[];
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constructor(
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network: RpcNetwork,
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relays: string[],
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query: RPCRequest,
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options: RpcQueryOptions
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) {
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super(network, "", query, options);
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constructor({
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network,
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relays,
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query,
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options,
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}: {
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network: RpcNetwork;
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relays: string[];
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query: RPCRequest;
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options: RpcQueryOptions;
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}) {
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super({ network, relay: "", query, options });
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this._relays = relays;
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}
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protected async _run(): Promise<void> {
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await setupRelay(this._network);
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// @ts-ignore
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this._relay = getActiveRelay().stream.remotePublicKey;
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await this.queryRelay();
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@ -27,7 +30,9 @@ export default class ClearCacheRpcQuery extends SimpleRpcQuery {
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}
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protected async queryRelay(): Promise<any> {
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return this.queryRpc(getActiveRelay(), {
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return this.queryRpc(
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this._network.getAvailableRelay("rpc", "broadcast_request"),
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{
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module: "rpc",
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method: "broadcast_request",
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data: {
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@ -38,6 +43,7 @@ export default class ClearCacheRpcQuery extends SimpleRpcQuery {
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},
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relays: this._relays,
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} as RPCBroadcastRequest,
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});
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}
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);
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}
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}
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@ -1,6 +1,5 @@
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import { ClientRPCRequest, RPCRequest } from "@lumeweb/relay-types";
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import { RpcQueryOptions } from "../types.js";
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import WisdomRpcQuery from "./wisdom.js";
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import SimpleRpcQuery from "./simple.js";
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import ClearCacheRpcQuery from "./clearCache.js";
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import RpcNetwork from "../network.js";
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@ -13,23 +12,6 @@ export default class RpcNetworkQueryFactory {
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this._network = network;
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}
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wisdom({
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query,
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options = {},
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}: {
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query: ClientRPCRequest;
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options?: RpcQueryOptions;
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}): WisdomRpcQuery {
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return new WisdomRpcQuery(
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this._network,
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{
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...query,
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bypassCache: query.bypassCache || this._network.bypassCache,
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},
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options
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).run();
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}
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simple({
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relay,
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query,
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@ -39,15 +21,15 @@ export default class RpcNetworkQueryFactory {
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query: ClientRPCRequest;
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options?: RpcQueryOptions;
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}): SimpleRpcQuery {
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return new SimpleRpcQuery(
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this._network,
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return new SimpleRpcQuery({
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network: this._network,
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relay,
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{
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query: {
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...query,
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bypassCache: query.bypassCache || this._network.bypassCache,
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bypassCache: query?.bypassCache || this._network.bypassCache,
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},
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options
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).run();
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options,
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}).run();
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}
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clearCache({
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@ -59,8 +41,13 @@ export default class RpcNetworkQueryFactory {
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query: RPCRequest;
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options?: RpcQueryOptions;
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}): ClearCacheRpcQuery {
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return new ClearCacheRpcQuery(this._network, relays, query, options).run();
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return new ClearCacheRpcQuery({
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network: this._network,
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query,
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relays,
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options,
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}).run();
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}
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}
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export { RpcNetwork, RpcQueryBase, SimpleRpcQuery, WisdomRpcQuery };
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export { RpcNetwork, RpcQueryBase, SimpleRpcQuery };
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@ -6,18 +6,24 @@ import { hashQuery, isPromise, validateTimestampedResponse } from "../util.js";
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import RPC from "@lumeweb/rpc";
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import { ERR_INVALID_SIGNATURE } from "../error.js";
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import RpcQueryBase from "./base.js";
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import { query } from "express";
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export default class SimpleRpcQuery extends RpcQueryBase {
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protected _relay: string;
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protected _relay?: string | any;
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protected declare _query: ClientRPCRequest;
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constructor(
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network: RpcNetwork,
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relay: string,
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query: ClientRPCRequest,
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options: RpcQueryOptions
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) {
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super(network, query, options);
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constructor({
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network,
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relay,
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query,
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options,
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}: {
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network: RpcNetwork;
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relay?: string | any;
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query: ClientRPCRequest;
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options: RpcQueryOptions;
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}) {
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super({ network, query, options });
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this._relay = relay;
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}
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@ -27,16 +33,37 @@ export default class SimpleRpcQuery extends RpcQueryBase {
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}
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protected async queryRelay(): Promise<any> {
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let socket: any;
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let socket = this._relay;
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if (socket) {
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if (socket === "string") {
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try {
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socket = this._network.dht.connect(b4a.from(this._relay, "hex"));
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const relay = this._network.getRelay(socket);
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if (this._network.getRelay(socket)) {
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socket = relay;
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}
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} catch {}
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}
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if (socket === "string") {
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try {
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socket = this._network.swarm.connect(b4a.from(this._relay, "hex"));
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if (isPromise(socket)) {
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socket = await socket;
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}
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} catch (e) {
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return;
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} catch {}
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}
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}
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if (!socket) {
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socket = this._network.getAvailableRelay(
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this._query.module,
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this._query.method
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);
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}
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this._relay = socket;
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await socket.opened;
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const rpc = new RPC(socket);
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@ -57,13 +84,8 @@ export default class SimpleRpcQuery extends RpcQueryBase {
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try {
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await this.queryRpc(rpc, this._query);
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} catch (e: any) {
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// @ts-ignore
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rpc.end();
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throw e;
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}
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// @ts-ignore
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rpc.end();
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}
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protected async checkResponses() {
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@ -76,7 +98,7 @@ export default class SimpleRpcQuery extends RpcQueryBase {
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if (
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!response.error &&
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!validateTimestampedResponse(
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b4a.from(this._relay, "hex") as Buffer,
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b4a.from(this._relay.remotePublicKey, "hex") as Buffer,
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response
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)
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) {
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|
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|
|
@ -1,178 +0,0 @@
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import {
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ClientRPCRequest,
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RPCBroadcastResponse,
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RPCRequest,
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RPCResponse,
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} from "@lumeweb/relay-types";
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import { clearTimeout } from "timers";
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import b4a from "b4a";
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import {
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flatten,
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validateResponse,
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validateTimestampedResponse,
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} from "../util.js";
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import { blake2b } from "libskynet";
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import { ERR_INVALID_SIGNATURE, ERR_NO_RELAYS } from "../error.js";
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import RpcQueryBase from "./base.js";
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import { getActiveRelay, setupRelay } from "../sharedRelay.js";
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function flatHash(data: any) {
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const flattenedData = flatten(data).sort();
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return Buffer.from(
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blake2b(Buffer.from(JSON.stringify(flattenedData)))
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).toString("hex");
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}
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export default class WisdomRpcQuery extends RpcQueryBase {
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protected declare _response?: RPCBroadcastResponse;
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protected declare _query: ClientRPCRequest;
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get result(): Promise<RPCResponse> {
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return this._promise as Promise<RPCResponse>;
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}
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protected async _run(): Promise<void> {
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await setupRelay(this._network);
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await this.queryRelay();
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await this.checkResponse();
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}
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protected resolve(data?: RPCResponse, timeout: boolean = false): void {
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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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protected async queryRelay(): Promise<any> {
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let activeRelay = getActiveRelay();
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let relays = this.getRelays();
|
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|
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if (!relays.length) {
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throw new Error(ERR_NO_RELAYS);
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}
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if (this._query.bypassCache) {
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delete this._query.bypassCache;
|
||||
const clearCacheQuery = this._network.factory.clearCache({
|
||||
relays,
|
||||
query: this._query,
|
||||
});
|
||||
await clearCacheQuery.result;
|
||||
}
|
||||
|
||||
if ("bypassCache" in this._query) {
|
||||
delete this._query.bypassCache;
|
||||
}
|
||||
return this.queryRpc(activeRelay, {
|
||||
module: "rpc",
|
||||
method: "broadcast_request",
|
||||
data: {
|
||||
request: this._query,
|
||||
relays,
|
||||
},
|
||||
} as RPCRequest);
|
||||
}
|
||||
|
||||
protected async checkResponse() {
|
||||
if (this._error) {
|
||||
this.resolve({ error: this._error });
|
||||
return;
|
||||
}
|
||||
|
||||
if (
|
||||
!validateResponse(
|
||||
// @ts-ignore
|
||||
getActiveRelay().stream.remotePublicKey,
|
||||
this._response as RPCResponse
|
||||
)
|
||||
) {
|
||||
this.resolve({ error: ERR_INVALID_SIGNATURE });
|
||||
return;
|
||||
}
|
||||
|
||||
let relays: RPCResponse[] = [];
|
||||
|
||||
for (const relay in this._response?.relays) {
|
||||
const resp = this._response?.relays[relay];
|
||||
if (resp?.error) {
|
||||
continue;
|
||||
}
|
||||
if (
|
||||
validateTimestampedResponse(
|
||||
b4a.from(relay, "hex") as Buffer,
|
||||
resp as RPCResponse
|
||||
)
|
||||
) {
|
||||
relays.push(resp as RPCResponse);
|
||||
}
|
||||
}
|
||||
|
||||
if (!relays.length) {
|
||||
this.resolve({ error: ERR_NO_RELAYS });
|
||||
return;
|
||||
}
|
||||
|
||||
type ResponseGroup = { [response: string]: number };
|
||||
|
||||
const responseObjects = relays.reduce((output: any, item: RPCResponse) => {
|
||||
const field = item.signedField || "data";
|
||||
// @ts-ignore
|
||||
const hash = flatHash(item[field]);
|
||||
output[hash] = item?.data;
|
||||
return output;
|
||||
}, {});
|
||||
|
||||
const responses: ResponseGroup = relays.reduce(
|
||||
(output: ResponseGroup, item: RPCResponse) => {
|
||||
const field = item.signedField || "data";
|
||||
// @ts-ignore
|
||||
const hash = flatHash(item[field]);
|
||||
output[hash] = output[hash] ?? 0;
|
||||
output[hash]++;
|
||||
return output;
|
||||
},
|
||||
{}
|
||||
);
|
||||
|
||||
for (const responseHash in responses) {
|
||||
if (
|
||||
responses[responseHash] / relays.length >=
|
||||
this._network.majorityThreshold
|
||||
) {
|
||||
let response: RPCResponse = responseObjects[responseHash];
|
||||
|
||||
response = { data: response };
|
||||
|
||||
this.resolve(response);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
protected getRelays(): string[] {
|
||||
if (
|
||||
this._network.maxRelays === 0 ||
|
||||
this._network.relays.length <= this._network.maxRelays
|
||||
) {
|
||||
return this._network.relays;
|
||||
}
|
||||
|
||||
const list: string[] = [];
|
||||
let available = this._network.relays;
|
||||
|
||||
while (list.length <= this._network.maxRelays) {
|
||||
const item = Math.floor(Math.random() * available.length);
|
||||
list.push(available[item]);
|
||||
available.splice(item, 1);
|
||||
}
|
||||
|
||||
return list;
|
||||
}
|
||||
}
|
||||
|
|
@ -1,34 +0,0 @@
|
|||
import { ERR_NO_RELAYS } from "./error.js";
|
||||
import b4a from "b4a";
|
||||
import { isPromise } from "./util.js";
|
||||
import RPC from "@lumeweb/rpc";
|
||||
import RpcNetwork from "./network.js";
|
||||
|
||||
let activeRelay: RPC | undefined;
|
||||
|
||||
export async function setupRelay(network: RpcNetwork) {
|
||||
const relays = network.relays;
|
||||
|
||||
if (!activeRelay) {
|
||||
if (!relays.length) {
|
||||
throw new Error(ERR_NO_RELAYS);
|
||||
}
|
||||
|
||||
let relay = relays[Math.floor(Math.random() * relays.length)];
|
||||
let socket = network.dht.connect(b4a.from(relay, "hex"));
|
||||
if (isPromise(socket)) {
|
||||
socket = await socket;
|
||||
}
|
||||
|
||||
await socket.opened;
|
||||
|
||||
activeRelay = new RPC(socket);
|
||||
socket.once("close", () => {
|
||||
activeRelay = undefined;
|
||||
});
|
||||
}
|
||||
}
|
||||
|
||||
export function getActiveRelay(): RPC {
|
||||
return activeRelay as RPC;
|
||||
}
|
||||
11
src/util.ts
11
src/util.ts
|
|
@ -69,8 +69,7 @@ export function validateResponse(
|
|||
): boolean {
|
||||
const field = response.signedField || "data";
|
||||
// @ts-ignore
|
||||
const data = response[field];
|
||||
let json = data;
|
||||
let json = response[field];
|
||||
if (typeof json !== "string") {
|
||||
json = stringify(json);
|
||||
}
|
||||
|
|
@ -105,3 +104,11 @@ export function hashQuery(query: RPCRequest): string {
|
|||
|
||||
return queryHash.toString("hex");
|
||||
}
|
||||
|
||||
export function createHash(data: string): Buffer {
|
||||
const buffer = b4a.from(data);
|
||||
let hash = b4a.allocUnsafe(32) as Buffer;
|
||||
sodium.crypto_generichash(hash, buffer);
|
||||
|
||||
return hash;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue