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91 lines
2.5 KiB
91 lines
2.5 KiB
/*
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This file is part of ethereum.js.
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ethereum.js is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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ethereum.js is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file jsonrpc.js
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* @authors:
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* Marek Kotewicz <marek@ethdev.com>
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* @date 2015
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*/
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var Jsonrpc = function () {
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// singleton pattern
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if (arguments.callee._singletonInstance) {
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return arguments.callee._singletonInstance;
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}
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arguments.callee._singletonInstance = this;
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this.messageId = 1;
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};
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/**
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* @return {Jsonrpc} singleton
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*/
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Jsonrpc.getInstance = function () {
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var instance = new Jsonrpc();
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return instance;
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};
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/**
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* Should be called to valid json create payload object
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*
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* @method toPayload
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* @param {Function} method of jsonrpc call, required
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* @param {Array} params, an array of method params, optional
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* @returns {Object} valid jsonrpc payload object
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*/
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Jsonrpc.prototype.toPayload = function (method, params) {
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if (!method)
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console.error('jsonrpc method should be specified!');
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return {
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jsonrpc: '2.0',
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method: method,
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params: params || [],
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id: this.messageId++
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};
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};
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/**
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* Should be called to check if jsonrpc response is valid
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*
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* @method isValidResponse
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* @param {Object}
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* @returns {Boolean} true if response is valid, otherwise false
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*/
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Jsonrpc.prototype.isValidResponse = function (response) {
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return !!response &&
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!response.error &&
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response.jsonrpc === '2.0' &&
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typeof response.id === 'number' &&
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response.result !== undefined; // only undefined is not valid json object
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};
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/**
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* Should be called to create batch payload object
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*
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* @method toBatchPayload
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* @param {Array} messages, an array of objects with method (required) and params (optional) fields
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* @returns {Array} batch payload
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*/
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Jsonrpc.prototype.toBatchPayload = function (messages) {
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var self = this;
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return messages.map(function (message) {
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return self.toPayload(message.method, message.params);
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});
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};
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module.exports = Jsonrpc;
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