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import AElf from 'aelf-sdk';
import { interopImportCJSDefault } from 'node-cjs-interop';
import asyncValidator from 'async-validator';
const Schema = interopImportCJSDefault(asyncValidator);
import Sign from './sign.js';
import Encrypt from './encrypt.js';
import { logger } from '../../utils/myLogger.js';
import { randomId } from '../../utils/utils.js';
import { serializeMessage, deserializeMessage, checkTimestamp } from './utils.js';
import { CHAIN_APIS } from './constants.js';
/**
* @typedef {import ('async-validator').Rules} Rules
*/
/** @type {Rules} */
const signRequestRules = {
id: {
required: true,
type: 'string',
min: 32
},
appId: {
required: true,
type: 'string',
min: 32
},
action: {
required: true,
type: 'string'
},
params: {
required: true,
type: 'object',
fields: {
originalParams: {
type: 'string',
required: true
},
signature: {
type: 'string',
required: true,
min: 129,
max: 130
}
}
}
};
/** @type {Rules} */
const encryptRequestRules = {
...signRequestRules,
params: {
type: 'object',
required: true,
fields: {
iv: {
type: 'string',
required: true
},
encryptedParams: {
type: 'string',
required: true
}
}
}
};
/** @type {Rules} */
const connectSignRules = {
...signRequestRules,
params: {
type: 'object',
required: true,
fields: {
encryptAlgorithm: {
type: 'enum',
enum: ['secp256k1'],
required: true
},
timestamp: {
type: 'number',
required: true
},
publicKey: {
type: 'string',
required: true
},
signature: {
type: 'string',
required: true,
min: 129,
max: 130
}
}
}
};
/** @type {Rules} */
const connectEncryptRules = {
...signRequestRules,
params: {
type: 'object',
required: true,
fields: {
encryptAlgorithm: {
type: 'enum',
enum: ['curve25519'],
required: true
},
cipher: {
type: 'string',
required: true
},
publicKey: {
type: 'string',
required: true
}
}
}
};
const signRequestValidator = new Schema(signRequestRules);
const encryptRequestValidator = new Schema(encryptRequestRules);
const connectSignValidator = new Schema(connectSignRules);
const connectEncryptValidator = new Schema(connectEncryptRules);
/**
* Represents the result of an operation.
* @typedef {Object} Result
* @property {number} code - The status code of the result.
* @property {string} msg - The message associated with the result.
* @property {any[]} error - An array of errors, if any.
* @property {any} data - The data returned by the operation.
*/
/**
* Represents a client connected to the server.
* @typedef {Object} Client
* @property {function(string, any): void} emit - Sends an event to the client.
* @property {function(boolean=): void} disconnect - Disconnects the client.
* @property {function(string, function): void} on - Sends an event to the client.
*/
/**
* Represents a message sent to the server.
* @typedef {Object} Message
* @property {string} id - The unique identifier for the message.
* @property {string} appId - The application ID sending the message.
* @property {string} action - The action to be performed.
* @property {any} params - The parameters for the action.
*/
class Socket {
/**
* Creates an instance of Socket.
* @param {Object} options - The socket options.
* @param {number} options.port - The port to run the socket server.
* @param {string} options.endpoint - The default endpoint for the socket server.
* @param {any} options.aelf - The AElf instance.
* @param {any} options.wallet - The wallet instance.
* @param {string} options.address - The address associated with the wallet.
*/
constructor(options) {
const { port, endpoint, aelf, wallet, address } = options;
this.aelf = aelf;
this.defaultEndpoint = endpoint;
this.wallet = wallet;
this.address = address;
this.handleConnection = this.handleConnection.bind(this);
this.socket = new Server(port, {
transports: ['websocket']
});
// @ts-ignore
this.socket.on('connection', this.handleConnection);
this.clientConfig = {
// default: {
// encryptWay: 'sign', // or 'encrypt'
// encrypt: new Sign()
// }
};
}
/**
* Formats the response.
* @param {string} id - The request ID.
* @param {any} [result] - The result data.
* @param {any} [errors] - The errors array.
* @returns {{id: string, result: Result}} The formatted result.
*/
responseFormat(id, result, errors) {
if (errors && (errors instanceof Error || (Array.isArray(errors) && errors.length > 0) || errors.Error)) {
return {
id,
result: {
error: Array.isArray(errors) ? errors : [errors.Error ? errors.Error : errors],
code: errors.code || 500,
msg: errors.message || 'err happened',
data: result
}
};
}
return {
id,
result: {
code: 0,
msg: 'success',
error: [],
data: result
}
};
}
/**
* Sends a response to the client.
* @param {Client} client - The client instance.
* @param {Result} result - The result object.
* @param {string} action - The action type.
* @param {string} appId - The application ID.
*/
send(client, result, action, appId) {
client.emit('bridge', result);
if (action === 'disconnect') {
delete this.clientConfig[appId];
client.disconnect(true);
}
}
/**
* Handles new client connections.
* @param {Client} client - The client instance.
*/
handleConnection(client) {
client.on('bridge', async data => {
logger.info('Message received');
/**@type {any} */
let result = {};
const { action, id, appId } = data;
try {
switch (action) {
case 'connect':
result = await this.handleConnect(data);
break;
case 'api':
result = await this.handleApi(data);
break;
case 'account':
result = await this.handleAccount(data);
break;
case 'invoke':
case 'invokeRead':
result = await this.handleInvoke(data, action === 'invokeRead');
break;
case 'getContractMethods':
result = await this.handleMethodList(data);
break;
case 'disconnect':
result = await this.handleDisconnect(data);
break;
case null:
case undefined:
case '':
throw new Error('You should set a action name');
default:
throw new Error(`${action} is not supported`);
}
result = this.responseFormat(id, result, null);
if (action !== 'connect') {
result.result = this.serializeResult(appId, result.result);
}
this.send(client, result, action, appId);
} catch (e) {
// @ts-ignore
logger.error('error happened');
// @ts-ignore
logger.error(e);
result = this.responseFormat(id, {}, e.errors ? e.errors : e);
if (action !== 'connect') {
result.result = this.serializeResult(appId, result.result);
}
this.send(client, result, action, appId);
}
});
}
/**
* Deserializes request parameters.
* @param {Message} request - The request message.
* @returns {Promise<any>} The deserialized parameters.
*/
async deserializeParams(request) {
const { appId, params } = request;
if (!this.clientConfig[appId]) {
throw new Error(`AppId ${appId} has not connected`);
}
if (this.clientConfig[appId].encryptWay === 'sign') {
await signRequestValidator.validate(request);
const { signature, originalParams } = params;
const isValid = this.clientConfig[appId].encrypt.verify(Buffer.from(originalParams, 'base64'), signature);
if (!isValid) {
throw new Error('Signature is not valid');
}
const deserializeParams = deserializeMessage(originalParams);
if (checkTimestamp(deserializeParams.timestamp)) {
return deserializeParams;
}
throw new Error('Timestamp is not valid');
}
await encryptRequestValidator.validate(request);
const { iv, encryptedParams } = params;
const originalParams = this.clientConfig[appId].encrypt.decrypt(encryptedParams, iv);
const deserializeParams = deserializeMessage(originalParams);
if (checkTimestamp(deserializeParams.timestamp)) {
return deserializeParams;
}
throw new Error('Timestamp is not valid');
}
serializeResult(appId, result) {
// delete next line as function deserializeParams already has the logic
// if (!this.clientConfig[appId]) {
// throw new Error(`AppId ${appId} has not connected`);
// }
if (this.clientConfig[appId]?.encryptWay === 'sign') {
const originalResult = serializeMessage(result);
const signature = this.clientConfig[appId].encrypt.sign(Buffer.from(originalResult, 'base64'));
return {
signature,
originalResult
};
}
const originalResult = serializeMessage(result);
return this.clientConfig[appId]?.encrypt.encrypt(originalResult);
}
/**
* Handles connect actions.
* @param {Message} message - The message object.
* @returns {Promise<any>} The result of the connect action.
*/
async handleConnect(message) {
const { appId, params } = message;
const { encryptAlgorithm, publicKey } = params;
if (params.cipher) {
await connectEncryptValidator.validate(message);
const { cipher } = params;
const random = randomId();
const encrypt = new Encrypt(encryptAlgorithm, publicKey, random, cipher);
this.clientConfig = {
...this.clientConfig,
[appId]: {
encryptWay: 'encrypt',
encrypt
}
};
logger.info(`App ${appId} has connected successfully in message encrypted way`);
return {
publicKey: encrypt.getPublicKey(),
random
};
}
if (params.signature) {
await connectSignValidator.validate(message);
const { timestamp, signature } = params;
const result = Sign.verify(encryptAlgorithm, publicKey, Buffer.from(String(timestamp)), signature);
if (!result) {
throw new Error('Not a valid signature');
}
if (!checkTimestamp(timestamp)) {
throw new Error('Timestamp is not valid');
}
this.clientConfig = {
...this.clientConfig,
[appId]: {
encryptWay: 'sign',
encrypt: new Sign(encryptAlgorithm, publicKey)
}
};
const responseRandom = randomId();
const responseSignature = this.clientConfig[appId].encrypt.sign(Buffer.from(responseRandom, 'hex'));
const responsePublicKey = this.clientConfig[appId].encrypt.getPublicKey();
logger.info(`App ${appId} has connected successfully in message signed way`);
return {
publicKey: responsePublicKey,
random: responseRandom,
signature: responseSignature
};
}
// @ts-ignore
logger.error('Not support encrypt method or not enough params');
throw new Error('Not support encrypt method or not enough params');
}
/**
* Handles method list requests.
* @param {Message} message - The message object.
* @returns {Promise<string[]>} The list of methods.
*/
async handleMethodList(message) {
const params = await this.deserializeParams(message);
const { endpoint = this.defaultEndpoint, address } = params;
this.aelf.setProvider(new AElf.providers.HttpProvider(endpoint || this.defaultEndpoint));
const contract = await this.aelf.chain.contractAt(address, this.wallet);
return Object.keys(contract)
.filter(v => /^[A-Z]/.test(v))
.sort();
}
/**
* Handles API requests.
* @param {Message} message - The message object.
* @returns {Promise<any>} The API result.
*/
async handleApi(message) {
const params = await this.deserializeParams(message);
const { endpoint = this.defaultEndpoint, apiPath, arguments: apiArgs, methodName } = params;
logger.info(`Querying api ${apiPath}...`);
if (!CHAIN_APIS[apiPath]) {
throw new Error(`Not support api ${apiPath}`);
}
this.aelf.setProvider(new AElf.providers.HttpProvider(endpoint || this.defaultEndpoint));
const result = await this.aelf.chain[methodName](...apiArgs.map(v => v.value));
return result;
}
/**
* Handles account actions.
* @param {Message} message - The message object.
* @returns {Promise<any>} The account result.
*/
async handleAccount(message) {
logger.info('Querying account information');
await this.deserializeParams(message);
// todo: support config file or passed by CLI parameters
return {
accounts: [
{
name: 'aelf-command',
address: this.address,
publicKey: this.wallet.keyPair.getPublic('hex')
}
],
chains: [
{
url: this.defaultEndpoint,
isMainChain: true,
chainId: 'AELF'
}
]
};
}
/**
* Handles invoke actions.
* @param {Message} message - The message object.
* @param {boolean} isReadOnly - If the invoke action is read-only.
* @returns {Promise<any>} The invoke result.
*/
async handleInvoke(message, isReadOnly) {
const params = await this.deserializeParams(message);
const { endpoint = this.defaultEndpoint, contractAddress, contractMethod, arguments: contractArgs } = params;
logger.info(`${isReadOnly ? 'Calling' : 'Sending'} contract ${contractAddress} method ${contractMethod}...`);
this.aelf.setProvider(new AElf.providers.HttpProvider(endpoint || this.defaultEndpoint));
const contract = await this.aelf.chain.contractAt(contractAddress, this.wallet);
if (!contract[contractMethod]) {
throw new Error(`No such method ${contractMethod}`);
}
let result;
if (isReadOnly) {
result = await contract[contractMethod].call(...contractArgs.map(v => v.value));
} else {
result = await contract[contractMethod](...contractArgs.map(v => v.value));
}
return result;
}
/**
* Handles disconnect actions.
* @param {Message} message - The message object.
* @returns {Promise<{}>} The result of the disconnect action.
*/
async handleDisconnect(message) {
// just to verify client
await this.deserializeParams(message);
logger.info(`App ${message.appId} disconnected`);
return {};
}
}
export default Socket;
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