mirror of
https://github.com/EvernodeXRPL/hpcore.git
synced 2026-04-29 15:37:59 +00:00
31344fe266
* Updated js contract lib to for ES spec compatibility. * Added 'ed' prefix to generated keys in js client lib. * Fixed js client lib incorrect connection timeout tracking.
956 lines
35 KiB
JavaScript
956 lines
35 KiB
JavaScript
(() => {
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// Whether we are in Browser or NodeJs.
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const isBrowser = !(typeof window === 'undefined');
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// In browser, avoid duplicate initializations.
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if (isBrowser && window.HotPocket)
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return;
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const supportedHpVersion = "1.0.0";
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const serverChallengeSize = 16;
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const outputValidationPassThreshold = 0.8;
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const connectionCheckIntervalMs = 1000;
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const recentActivityThresholdMs = 3000;
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const edKeyType = 237;
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const textEncoder = new TextEncoder();
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const textDecoder = new TextDecoder();
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// External dependency references.
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let WebSocket = null;
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let sodium = null;
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let bson = null;
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let blake3 = null;
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let logLevel = 0; // 0=info, 1=error
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/*--- Included in public interface. ---*/
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const protocols = {
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json: "json",
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bson: "bson" // (Requires nodejs or browserified hp client library on Browser)
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}
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Object.freeze(protocols);
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/*--- Included in public interface. ---*/
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const events = {
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disconnect: "disconnect",
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contractOutput: "contractOutput",
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contractReadResponse: "contractReadResponse",
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connectionChange: "connectionChange",
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unlChange: "unlChange"
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}
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Object.freeze(events);
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/*--- Included in public interface. ---*/
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// privateKeyHex: Hex private key with prefix ('ed').
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// Returns 'ed' (237) prefixed binary public/private keys.
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const generateKeys = async (privateKeyHex = null) => {
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await initSodium();
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if (!privateKeyHex) {
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const keys = sodium.crypto_sign_keypair();
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const binPrivateKey = new Uint8Array(65);
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binPrivateKey[0] = edKeyType;
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binPrivateKey.set(keys.privateKey, 1);
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const binPublicKey = new Uint8Array(33);
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binPublicKey[0] = edKeyType;
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binPublicKey.set(keys.publicKey, 1);
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return {
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privateKey: binPrivateKey,
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publicKey: binPublicKey
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}
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}
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else {
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const binPrivateKey = hexToUint8Array(privateKeyHex);
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if (binPrivateKey[0] != edKeyType)
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throw "Invaid key type. 'ed' expected.";
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const binPublicKey = new Uint8Array(33);
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binPublicKey[0] = edKeyType;
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binPublicKey.set(binPrivateKey.slice(33), 1);
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return {
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privateKey: binPrivateKey,
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publicKey: binPublicKey
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}
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}
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}
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/*--- Included in public interface. ---*/
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const createClient = async (servers, clientKeys, options) => {
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const defaultOptions = {
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contractId: null,
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contractVersion: null,
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trustedServerKeys: null,
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protocol: protocols.json,
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requiredConnectionCount: 1,
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connectionTimeoutMs: 5000
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};
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const opt = options ? { ...defaultOptions, ...options } : defaultOptions;
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if (!clientKeys)
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throw "clientKeys not specified.";
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if (opt.contractId == "")
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throw "contractId not specified. Specify null to bypass contract id validation.";
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if (opt.contractVersion == "")
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throw "contractVersion not specified. Specify null to bypass contract version validation.";
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if (!opt.protocol || (opt.protocol != protocols.json && opt.protocol != protocols.bson))
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throw "Valid protocol not specified.";
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if (!opt.requiredConnectionCount || opt.requiredConnectionCount == 0)
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throw "requiredConnectionCount must be greater than 0.";
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if (!opt.connectionTimeoutMs || opt.connectionTimeoutMs == 0)
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throw "Connection timeout must be greater than 0.";
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await initSodium();
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await initBlake3();
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initWebSocket();
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if (opt.protocol == protocols.bson)
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initBson();
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// Load servers and serverKeys to object keys to avoid duplicates.
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const serversLookup = {};
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servers && servers.forEach(s => {
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const url = s.trim();
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if (url.length > 0)
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serversLookup[url] = true
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});
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if (Object.keys(serversLookup).length == 0)
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throw "servers not specified.";
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if (opt.requiredConnectionCount > Object.keys(serversLookup).length)
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throw "requiredConnectionCount is higher than no. of servers.";
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let trustedKeysLookup = {};
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opt.trustedServerKeys && opt.trustedServerKeys.sort().forEach(k => {
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const key = k.trim();
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if (key.length > 0)
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trustedKeysLookup[key] = true
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});
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if (Object.keys(trustedKeysLookup).length == 0)
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trustedKeysLookup = null;
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return new HotPocketClient(opt.contractId, opt.contractVersion, clientKeys, serversLookup, trustedKeysLookup, opt.protocol, opt.requiredConnectionCount, opt.connectionTimeoutMs);
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}
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function HotPocketClient(contractId, contractVersion, clientKeys, serversLookup, trustedKeysLookup, protocol, requiredConnectionCount, connectionTimeoutMs) {
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let emitter = new EventEmitter();
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// The accessor function passed into connections to query latest trusted key list.
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// We update the returning key list whenever we get a unl update.
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const getTrustedKeys = () => trustedKeysLookup;
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// Whenever unl change is reported, update the trusted key list.
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emitter.on(events.unlChange, (unl) => {
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trustedKeysLookup = {};
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unl.sort().forEach(pubkey => trustedKeysLookup[pubkey] = true);
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})
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const nodes = Object.keys(serversLookup).map(s => {
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return {
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server: s, // Server address.
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connection: null, // Hot Pocket connection (if any).
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lastActivity: 0 // Last connection activity timestamp.
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}
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});
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let status = 0; //0:none, 1:connected, 2:closed
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// This will get fired whenever the required connection count gets fullfilled.
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let initialConnectSuccess = null;
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// Tracks when was the earliest time that we were missing some required connections.
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// 0 indicates we are not missing any connections. This will be initially set when connect() is called.
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let connectionsMissingFrom = 0;
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// Checks for missing connections and attempts to establish them.
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const reviewConnections = () => {
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if (status == 2)
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return;
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// Check for connection changes periodically.
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setTimeout(() => {
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reviewConnections();
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}, connectionCheckIntervalMs);
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// Check whether we have fullfilled all required connections.
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if (nodes.filter(n => n.connection && n.connection.isConnected()).length == requiredConnectionCount) {
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connectionsMissingFrom = 0;
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initialConnectSuccess && initialConnectSuccess(true);
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initialConnectSuccess = null;
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status = 1;
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return;
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}
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if (connectionsMissingFrom == 0) {
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// Reaching here means we moved from connections-fullfilled state to missing-connections state.
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connectionsMissingFrom = new Date().getTime();
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}
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else if ((new Date().getTime() - connectionsMissingFrom) > connectionTimeoutMs) {
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// This means we were not able to maintain required connection count for the entire timeout period.
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liblog(1, "Missing-connections timeout reached.");
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// Close and cleanup all connections if we hit the timeout.
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this.close().then(() => {
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if (initialConnectSuccess) {
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initialConnectSuccess(false);
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initialConnectSuccess = null;
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}
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else {
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emitter && emitter.emit(events.disconnect);
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}
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});
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return;
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}
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// Reaching here means we should attempt to establish more connections if we have available slots.
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let currentConnectionCount = nodes.filter(n => n.connection).length;
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if (currentConnectionCount == requiredConnectionCount)
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return;
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// Find out available slots.
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// Skip nodes that are already connected or is currently establishing connection.
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// Skip nodes that have recently shown some connection activity.
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// Give priority to nodes that have not shown any activity recently.
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const freeNodes = nodes.filter(n => !n.connection && (new Date().getTime() - n.lastActivity) > recentActivityThresholdMs);
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freeNodes.sort((a, b) => a.lastActivity - b.lastActivity); // Oldest activity comes first.
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while (currentConnectionCount < requiredConnectionCount && freeNodes.length > 0) {
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// Get the next available node.
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const n = freeNodes.shift();
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n.connection = new HotPocketConnection(contractId, contractVersion, clientKeys, n.server, getTrustedKeys, protocol, connectionTimeoutMs, emitter);
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n.lastActivity = new Date().getTime();
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n.connection.connect().then(success => {
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if (!success)
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n.connection = null;
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else
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emitter && emitter.emit(events.connectionChange, n.server, "add");
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});
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n.connection.onClose = () => {
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n.connection = null;
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emitter && emitter.emit(events.connectionChange, n.server, "remove");
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};
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currentConnectionCount++;
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}
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}
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this.connect = () => {
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if (status > 0)
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return;
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// Start the missing-connections timer tracking from this point onwards.
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connectionsMissingFrom = new Date().getTime();
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reviewConnections();
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return new Promise(resolve => {
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initialConnectSuccess = resolve;
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})
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}
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this.close = async () => {
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if (status == 2)
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return;
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status = 2;
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emitter.clear(events.connectionChange);
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emitter.clear(events.contractOutput);
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emitter.clear(events.contractReadResponse);
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// Close all nodes connections.
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await Promise.all(nodes.filter(n => n.connection).map(n => n.connection.close()));
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nodes.forEach(n => n.connection = null);
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}
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this.on = (event, listener) => {
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emitter.on(event, listener);
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}
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this.clear = (event) => {
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emitter.clear(event);
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}
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this.sendContractInput = async (input, nonce = null, maxLclOffset = null) => {
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if (status == 2)
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return;
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return await Promise.all(
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nodes.filter(n => n.connection && n.connection.isConnected())
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.map(n => n.connection.sendContractInput(input, nonce, maxLclOffset)));
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}
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this.sendContractReadRequest = (request) => {
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if (status == 2)
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return;
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nodes.filter(n => n.connection && n.connection.isConnected()).forEach(n => {
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n.connection.sendContractReadRequest(request);
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});
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}
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}
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function HotPocketConnection(contractId, contractVersion, clientKeys, server, getTrustedKeys, protocol, connectionTimeoutMs, emitter) {
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// Create message helper with JSON protocol initially.
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// After challenge handshake, we will change this to use the protocol specified by user.
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const msgHelper = new MessageHelper(clientKeys, protocols.json);
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let connectionStatus = 0; // 0:none, 1:server challenge sent, 2:handshake complete.
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let serverChallenge = null; // The hex challenge we have issued to the server.
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let reportedContractId = null;
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let reportedContractVersion = null;
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let pubkey = false; // Pubkey hex (with prefix) of this connection.
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let ws = null;
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let handshakeTimer = null; // Timer to track connection handshake timeout.
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let handshakeResolver = null;
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let closeResolver = null;
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let statResponseResolvers = [];
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let contractInputResolvers = {};
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// Calcualtes the blake3 hash of all array items.
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const getHash = (arr) => {
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const hash = blake3.createHash();
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arr.forEach(item => hash.update(item));
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return new Uint8Array(hash.digest());
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}
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// Get root hash of the given merkle hash tree. (called recursively)
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// checkHashString specifies the hash that must be checked for existance.
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const getMerkleHash = (tree, checkHashString) => {
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const listToHash = []; // Collects elements to hash.
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let checkHashFound = false;
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for (let elem of tree) {
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if (Array.isArray(elem)) {
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// If the 'elem' is an array we should find the root hash of the array.
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// Call this func recursively. If checkHash already found, pass null.
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const result = getMerkleHash(elem, checkHashFound ? null : checkHashString);
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if (result[0] == true)
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checkHashFound = true;
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listToHash.push(result[1]);
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}
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else {
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// 'elem' is a single hash value. We get the hash bytes depending on the data type.
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// (json encoding will use hex string and bson will use buffer)
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const hashBytes = isString(elem) ? hexToUint8Array(elem) : elem.buffer;
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listToHash.push(hashBytes);
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// If checkHash is specified, compare the hashes.
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if (checkHashString && msgHelper.stringifyValue(hashBytes) == checkHashString)
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checkHashFound = true;
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}
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}
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// Return a tuple of whether check hash was found and the root hash of the provided merkle tree.
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return [checkHashFound, getHash(listToHash)];
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}
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// Verifies whether the provided root hash has enough signatures from unl.
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const validateHashSignatures = (rootHash, signatures, unlKeysLookup) => {
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const totalUnl = Object.keys(unlKeysLookup).length;
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if (totalUnl == 0) {
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liblog(1, "Cannot validate outputs with empty unl.");
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return false;
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}
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const passedKeys = {};
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// 'signatures' is an array of pairs of [pubkey, signature]
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for (pair of signatures) {
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const pubkeyHex = msgHelper.stringifyValue(pair[0]); // Gets the pubkey hex to use for unl lookup key.
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// Get the signature and issuer pubkey bytes based on the data type.
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// (json encoding will use hex string and bson will use buffer)
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const binPubkey = isString(pair[0]) ? hexToUint8Array(pair[0]) : pair[0].buffer;
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const sig = isString(pair[1]) ? hexToUint8Array(pair[1]) : pair[1].buffer;
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// Check whether the pubkey is in unl and whether signature is valid.
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if (!passedKeys[pubkeyHex] && unlKeysLookup[pubkeyHex] && sodium.crypto_sign_verify_detached(sig, rootHash, binPubkey.slice(1)))
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passedKeys[pubkeyHex] = true;
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}
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// Check the percentage of unl keys that passed the signature check.
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const passed = Object.keys(passedKeys).length;
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return ((passed / totalUnl) >= outputValidationPassThreshold);
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}
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const validateOutput = (msg, trustedKeys) => {
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// Calculate combined output hash with user's pubkey.
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const outputHash = getHash([clientKeys.publicKey, ...msgHelper.spreadArrayField(msg.outputs)]);
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const result = getMerkleHash(msg.hashes, msgHelper.stringifyValue(outputHash));
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if (result[0] == true) {
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const rootHash = result[1];
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// Verify the issued signatures against the root hash.
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return validateHashSignatures(rootHash, msg.unl_sig, trustedKeys);
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}
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return false;
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}
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const validateAndEmitUnlChange = (changedUnl) => {
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// If this is currently a trusted connection, notify unl update.
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const trustedKeys = getTrustedKeys();
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if (trustedKeys && trustedKeys[pubkey]) {
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// Prepare sorted new unl lookup object for equality comparison.
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const newUnl = {};
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changedUnl.sort().forEach(k => newUnl[k] = true);
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// Only emit unl change event if the unl has really changed.
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if (JSON.stringify(trustedKeys) != JSON.stringify(newUnl))
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emitter && emitter.emit(events.unlChange, changedUnl);
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}
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}
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const handshakeMessageHandler = (m) => {
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if (connectionStatus == 0 && m.type == "user_challenge" && m.hp_version && m.contract_id) {
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if (m.hp_version != supportedHpVersion) {
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liblog(1, `Incompatible Hot Pocket server version. Expected:${supportedHpVersion} Got:${m.hp_version}`);
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return false;
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}
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else if (!m.contract_id) {
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liblog(1, "Server did not specify contract id.");
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return false;
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}
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else if (contractId && m.contract_id != contractId) {
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liblog(1, `Contract id mismatch. Expected:${contractId} Got:${m.contract_id}`);
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return false;
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}
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else if (!m.contract_version) {
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liblog(1, "Server did not specify contract version.");
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return false;
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}
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else if (contractVersion && m.contract_version != contractVersion) {
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liblog(1, `Contract version mismatch. Expected:${contractVersion} Got:${m.contract_version}`);
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return false;
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}
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reportedContractId = m.contract_id;
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reportedContractVersion = m.contract_version;
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// Generate the challenge we are sending to server.
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serverChallenge = uint8ArrayToHex(sodium.randombytes_buf(serverChallengeSize));
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// Sign the challenge and send back the response
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const response = msgHelper.createUserChallengeResponse(m.challenge, serverChallenge, protocol);
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wsSend(msgHelper.serializeObject(response));
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connectionStatus = 1;
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return true;
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}
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else if (connectionStatus == 1 && serverChallenge && m.type == "server_challenge_response" && m.sig && m.pubkey) {
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// Verify server challenge response.
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const stringToVerify = serverChallenge + reportedContractId + reportedContractVersion;
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const serverPubkeyHex = m.pubkey.substring(2); // Skip 'ed' prefix;
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if (!sodium.crypto_sign_verify_detached(hexToUint8Array(m.sig), stringToVerify, hexToUint8Array(serverPubkeyHex))) {
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liblog(1, `${server} challenge response verification failed.`);
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return false;
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}
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clearTimeout(handshakeTimer); // Cancel the handshake timeout monitor.
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handshakeTimer = null;
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serverChallenge = null; // Clear the sent challenge as we no longer need it.
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msgHelper.useProtocol(protocol); // Here onwards, use the message protocol specified by user.
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pubkey = m.pubkey; // Set this connection's public key.
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connectionStatus = 2; // Handshake complete.
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// If we are still connected, report handshaking as successful.
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// (If websocket disconnects, handshakeResolver will be already null)
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handshakeResolver && handshakeResolver(true);
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liblog(0, `Connected to ${server}`);
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validateAndEmitUnlChange(m.unl);
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return true;
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}
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liblog(1, `${server} invalid message during handshake. Connection status:${connectionStatus}`);
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liblog(0, m);
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return false;
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}
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const contractMessageHandler = (m) => {
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if (m.type == "contract_read_response") {
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emitter && emitter.emit(events.contractReadResponse, msgHelper.deserializeOutput(m.content));
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}
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else if (m.type == "contract_input_status") {
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const sigKey = msgHelper.stringifyValue(m.input_sig);
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const resolver = contractInputResolvers[sigKey];
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if (resolver) {
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if (m.status == "accepted")
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resolver("ok");
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else
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resolver(m.reason);
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delete contractInputResolvers[sigKey];
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}
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}
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else if (m.type == "contract_output") {
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if (emitter) {
|
|
// Validate outputs if trusted keys is not null. (null means bypass validation)
|
|
const trustedKeys = getTrustedKeys();
|
|
if (!trustedKeys || validateOutput(m, trustedKeys))
|
|
m.outputs.forEach(output => emitter.emit(events.contractOutput, msgHelper.deserializeOutput(output)));
|
|
else
|
|
liblog(1, "Output validation failed.");
|
|
}
|
|
}
|
|
else if (m.type == "stat_response") {
|
|
statResponseResolvers.forEach(resolver => {
|
|
resolver({
|
|
hpVersion: m.hp_version,
|
|
lclSeqNo: m.lcl_seq_no,
|
|
lclHash: m.lcl_hash,
|
|
roundTime: m.round_time,
|
|
contractExecutionEnabled: m.contract_execution_enabled,
|
|
readRequestsEnabled: m.read_requests_enabled,
|
|
isFullHistoryNode: m.is_full_history_node,
|
|
currentUnl: m.current_unl,
|
|
peers: m.peers
|
|
});
|
|
})
|
|
statResponseResolvers = [];
|
|
}
|
|
else if (m.type == "unl_change") {
|
|
if (m.unl) {
|
|
// Convert unl pubkeys to hex string.
|
|
let unl = m.unl.map(k => msgHelper.stringifyValue(k));
|
|
validateAndEmitUnlChange(unl);
|
|
}
|
|
}
|
|
else {
|
|
liblog(1, "Received unrecognized contract message: type:" + m.type);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
const messageHandler = async (rcvd) => {
|
|
|
|
// Decode the received data buffer.
|
|
// In browser, text(json) mode requires the buffer to be "decoded" to text before JSON parsing.
|
|
const isTextMode = (connectionStatus < 2 || protocol == protocols.json);
|
|
const data = (isBrowser && isTextMode) ? textDecoder.decode(rcvd.data) : rcvd.data;
|
|
|
|
try {
|
|
m = msgHelper.deserializeMessage(data);
|
|
}
|
|
catch (e) {
|
|
liblog(1, e);
|
|
liblog(0, "Exception deserializing: ");
|
|
liblog(0, data || rcvd);
|
|
|
|
// If we get invalid message during handshake, close the socket.
|
|
if (connectionStatus < 2)
|
|
this.close();
|
|
|
|
return;
|
|
}
|
|
|
|
let isValid = false;
|
|
if (connectionStatus < 2)
|
|
isValid = handshakeMessageHandler(m);
|
|
else if (connectionStatus == 2)
|
|
isValid = contractMessageHandler(m);
|
|
|
|
if (!isValid) {
|
|
// If we get invalid message during handshake, close the socket.
|
|
if (connectionStatus < 2)
|
|
this.close();
|
|
}
|
|
}
|
|
|
|
const openHandler = () => {
|
|
ws.addEventListener("message", messageHandler);
|
|
ws.addEventListener("close", closeHandler);
|
|
|
|
handshakeTimer = setTimeout(() => {
|
|
// If handshake does not complete within timeout, close the connection.
|
|
this.close();
|
|
handshakeTimer = null;
|
|
}, connectionTimeoutMs);
|
|
}
|
|
|
|
const closeHandler = () => {
|
|
|
|
if (closeResolver)
|
|
liblog(0, "Closing connection to " + server);
|
|
else
|
|
liblog(0, "Disconnected from " + server);
|
|
|
|
emitter = null;
|
|
|
|
if (handshakeTimer)
|
|
clearTimeout(handshakeTimer);
|
|
|
|
// If there are any ongoing resolvers resolve them with error output.
|
|
|
|
handshakeResolver && handshakeResolver(false);
|
|
handshakeResolver = null;
|
|
|
|
statResponseResolvers.forEach(resolver => resolver(null));
|
|
statResponseResolvers = [];
|
|
|
|
Object.values(contractInputResolvers).forEach(resolver => resolver(null));
|
|
contractInputResolvers = {};
|
|
|
|
this.onClose && this.onClose();
|
|
closeResolver && closeResolver();
|
|
}
|
|
|
|
const errorHandler = (e) => {
|
|
handshakeResolver && handshakeResolver(false);
|
|
}
|
|
|
|
const wsSend = (msg) => {
|
|
if (isString(msg))
|
|
ws.send(textEncoder.encode(msg));
|
|
else
|
|
ws.send(msg);
|
|
}
|
|
|
|
this.isConnected = () => {
|
|
return connectionStatus == 2;
|
|
};
|
|
|
|
this.connect = () => {
|
|
liblog(0, "Connecting to " + server);
|
|
return new Promise(resolve => {
|
|
|
|
ws = isBrowser ? new WebSocket(server) : new WebSocket(server, { rejectUnauthorized: false });
|
|
if (isBrowser)
|
|
ws.binaryType = "arraybuffer";
|
|
|
|
handshakeResolver = resolve;
|
|
ws.addEventListener("error", errorHandler);
|
|
ws.addEventListener("open", openHandler);
|
|
});
|
|
}
|
|
|
|
this.close = () => {
|
|
if (ws.readyState == WebSocket.OPEN) {
|
|
return new Promise(resolve => {
|
|
closeResolver = resolve;
|
|
ws.close();
|
|
});
|
|
}
|
|
else {
|
|
return Promise.resolve();
|
|
}
|
|
}
|
|
|
|
this.getStatus = () => {
|
|
|
|
if (connectionStatus != 2)
|
|
return Promise.resolve(null);
|
|
|
|
const p = new Promise(resolve => {
|
|
statResponseResolvers.push(resolve);
|
|
});
|
|
|
|
// If this is the only awaiting stat request, then send an actual stat request.
|
|
// Otherwise simply wait for the previously sent request.
|
|
if (statResponseResolvers.length == 1) {
|
|
const msg = msgHelper.createStatusRequest();
|
|
wsSend(msgHelper.serializeObject(msg));
|
|
}
|
|
return p;
|
|
}
|
|
|
|
this.sendContractInput = async (input, nonce = null, maxLclOffset = null) => {
|
|
|
|
if (connectionStatus != 2)
|
|
return null;
|
|
|
|
if (!maxLclOffset)
|
|
maxLclOffset = 10;
|
|
|
|
if (!nonce)
|
|
nonce = (new Date()).getTime().toString();
|
|
else
|
|
nonce = nonce.toString();
|
|
|
|
// Acquire the current lcl and add the specified offset.
|
|
const stat = await this.getStatus();
|
|
if (!stat)
|
|
return new Promise(resolve => resolve("ledger_status_error"));
|
|
const maxLclSeqNo = stat.lclSeqNo + maxLclOffset;
|
|
|
|
const msg = msgHelper.createContractInput(input, nonce, maxLclSeqNo);
|
|
const sigKey = msgHelper.stringifyValue(msg.sig);
|
|
const p = new Promise(resolve => {
|
|
contractInputResolvers[sigKey] = resolve;
|
|
});
|
|
|
|
wsSend(msgHelper.serializeObject(msg));
|
|
return p;
|
|
}
|
|
|
|
this.sendContractReadRequest = (request) => {
|
|
|
|
if (connectionStatus != 2)
|
|
return;
|
|
|
|
const msg = msgHelper.createReadRequest(request);
|
|
wsSend(msgHelper.serializeObject(msg));
|
|
}
|
|
}
|
|
|
|
function MessageHelper(keys, protocol) {
|
|
|
|
this.useProtocol = (p) => {
|
|
protocol = p;
|
|
}
|
|
|
|
this.binaryEncode = (data) => {
|
|
return protocol == protocols.json ?
|
|
uint8ArrayToHex(data) :
|
|
(Buffer.isBuffer(data) ? data : Buffer.from(data));
|
|
}
|
|
|
|
this.serializeObject = (obj) => {
|
|
return protocol == protocols.json ? JSON.stringify(obj) : bson.serialize(obj);
|
|
}
|
|
|
|
this.deserializeMessage = (m) => {
|
|
return protocol == protocols.json ? JSON.parse(m) : bson.deserialize(m);
|
|
}
|
|
|
|
this.serializeInput = (input) => {
|
|
return protocol == protocols.json ?
|
|
(isString(input) ? input : input.toString()) :
|
|
(Buffer.isBuffer(input) ? input : Buffer.from(input));
|
|
}
|
|
|
|
this.deserializeOutput = (content) => {
|
|
return protocol == protocols.json ? content : content.buffer;
|
|
}
|
|
|
|
// Used for generating strings to hold values as js object keys.
|
|
this.stringifyValue = (val) => {
|
|
if (isString(val))
|
|
return val;
|
|
else if (val instanceof Uint8Array)
|
|
return uint8ArrayToHex(val);
|
|
else if (val.buffer) // BSON binary.
|
|
return uint8ArrayToHex(new Uint8Array(val.buffer));
|
|
else
|
|
throw "Cannot stringify signature.";
|
|
}
|
|
|
|
// Spreads hex/binary item array.
|
|
this.spreadArrayField = (outputs) => {
|
|
return protocol == protocols.json ? outputs : outputs.map(o => o.buffer);
|
|
}
|
|
|
|
this.createUserChallengeResponse = (userChallenge, serverChallenge, msgProtocol) => {
|
|
// For challenge response encoding Hot Pocket always uses json.
|
|
// Challenge response will specify the protocol to use for contract messages.
|
|
const sigBytes = sodium.crypto_sign_detached(userChallenge, keys.privateKey.slice(1));
|
|
|
|
return {
|
|
type: "user_challenge_response",
|
|
sig: this.binaryEncode(sigBytes),
|
|
pubkey: this.binaryEncode(keys.publicKey),
|
|
server_challenge: serverChallenge,
|
|
protocol: msgProtocol
|
|
}
|
|
}
|
|
|
|
this.createContractInput = (input, nonce, maxLclSeqNo) => {
|
|
|
|
if (input.length == 0)
|
|
return null;
|
|
|
|
const inpContainer = {
|
|
input: this.serializeInput(input),
|
|
nonce: nonce,
|
|
max_lcl_seq_no: maxLclSeqNo
|
|
}
|
|
|
|
const serlializedInpContainer = this.serializeObject(inpContainer);
|
|
const sigBytes = sodium.crypto_sign_detached(serlializedInpContainer, keys.privateKey.slice(1));
|
|
|
|
const signedInpContainer = {
|
|
type: "contract_input",
|
|
input_container: serlializedInpContainer,
|
|
sig: this.binaryEncode(sigBytes)
|
|
}
|
|
|
|
return signedInpContainer;
|
|
}
|
|
|
|
this.createReadRequest = (request) => {
|
|
if (request.length == 0)
|
|
return null;
|
|
|
|
return {
|
|
type: "contract_read_request",
|
|
content: this.serializeInput(request)
|
|
}
|
|
}
|
|
|
|
this.createStatusRequest = () => {
|
|
return { type: "stat" };
|
|
}
|
|
}
|
|
|
|
function hexToUint8Array(hexString) {
|
|
return new Uint8Array(hexString.match(/.{1,2}/g).map(byte => parseInt(byte, 16)));
|
|
}
|
|
|
|
function uint8ArrayToHex(bytes) {
|
|
return bytes.reduce((str, byte) => str + byte.toString(16).padStart(2, "0"), "");
|
|
}
|
|
|
|
function isString(obj) {
|
|
return (typeof obj === "string" || obj instanceof String);
|
|
}
|
|
|
|
function EventEmitter() {
|
|
const registrations = {};
|
|
|
|
this.on = (eventName, listener) => {
|
|
if (!registrations[eventName])
|
|
registrations[eventName] = [];
|
|
registrations[eventName].push(listener);
|
|
}
|
|
|
|
this.emit = (eventName, ...value) => {
|
|
if (registrations[eventName])
|
|
registrations[eventName].forEach(listener => listener(...value));
|
|
}
|
|
|
|
this.clear = (eventName) => {
|
|
if (eventName)
|
|
delete registrations[eventName]
|
|
else
|
|
Object.keys(registrations).forEach(k => delete registrations[k]);
|
|
}
|
|
}
|
|
|
|
// Set sodium reference.
|
|
async function initSodium() {
|
|
|
|
if (isBrowser) { // Browser
|
|
if (!sodium) {
|
|
sodium = window.sodium || await new Promise(resolve => {
|
|
window.sodium = {
|
|
onload: async (sodiumRef) => resolve(sodiumRef)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
else { // nodejs
|
|
if (!sodium)
|
|
sodium = require('libsodium-wrappers');
|
|
await sodium.ready;
|
|
}
|
|
|
|
if (!sodium)
|
|
throw "Sodium reference not found. Please include sodium js lib in browser scripts.";
|
|
}
|
|
|
|
// Set bson reference.
|
|
function initBson() {
|
|
if (bson) // If already set, do nothing.
|
|
return;
|
|
else if (isBrowser && window.BSON) // browser
|
|
bson = window.BSON;
|
|
else if (!isBrowser) // nodejs
|
|
bson = require('bson');
|
|
|
|
if (!bson)
|
|
throw "BSON reference not found.";
|
|
}
|
|
|
|
// Set WebSocket reference.
|
|
function initWebSocket() {
|
|
if (WebSocket) // If already set, do nothing.
|
|
return;
|
|
else if (isBrowser && window.WebSocket) // browser
|
|
WebSocket = window.WebSocket;
|
|
else if (!isBrowser) // nodejs
|
|
WebSocket = require('ws');
|
|
|
|
if (!WebSocket)
|
|
throw "WebSocket reference not found.";
|
|
}
|
|
|
|
let blake3Resolver = null;
|
|
// Set blake3 reference.
|
|
async function initBlake3() {
|
|
if (blake3) // If already set, do nothing.
|
|
return;
|
|
else if (isBrowser && window.blake3) // browser (if blake3 already loaded)
|
|
blake3 = window.blake3;
|
|
else if (isBrowser && !window.blake3) // If blake3 not yet loaded in browser, wait for it.
|
|
blake3 = await new Promise(resolve => blake3Resolver = resolve);
|
|
else if (!isBrowser) // nodejs
|
|
blake3 = require('blake3');
|
|
|
|
if (!blake3)
|
|
throw "Blake3 reference not found.";
|
|
}
|
|
|
|
function setBlake3(blake3ref) {
|
|
if (blake3Resolver) {
|
|
blake3Resolver(blake3ref)
|
|
blake3Resolver = null;
|
|
}
|
|
else {
|
|
blake3 = blake3ref;
|
|
}
|
|
}
|
|
|
|
function setLogLevel(level) {
|
|
logLevel = level;
|
|
}
|
|
|
|
function liblog(level, msg) {
|
|
if (level >= logLevel)
|
|
console.log(msg);
|
|
}
|
|
|
|
if (isBrowser) {
|
|
window.HotPocket = {
|
|
generateKeys,
|
|
createClient,
|
|
events,
|
|
protocols,
|
|
setBlake3,
|
|
setLogLevel
|
|
};
|
|
}
|
|
else {
|
|
module.exports = {
|
|
generateKeys,
|
|
createClient,
|
|
events,
|
|
protocols,
|
|
setLogLevel
|
|
};
|
|
}
|
|
})(); |