77 lines
2.7 KiB
JavaScript
77 lines
2.7 KiB
JavaScript
/*
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This file is part of web3.js.
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web3.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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web3.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 web3.js. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file givenProvider.js
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* @author Fabian Vogelsteller <fabian@ethereum.org>
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* @date 2017
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*/
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"use strict";
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var givenProvider = null;
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// ADD GIVEN PROVIDER
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/* jshint ignore:start */
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var global;
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try {
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global = Function('return this')();
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}
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catch (e) {
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global = window;
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}
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// EIP-1193: window.ethereum
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if (typeof global.ethereum !== 'undefined') {
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givenProvider = global.ethereum;
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// Legacy web3.currentProvider
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}
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else if (typeof global.web3 !== 'undefined' && global.web3.currentProvider) {
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if (global.web3.currentProvider.sendAsync) {
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global.web3.currentProvider.send = global.web3.currentProvider.sendAsync;
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delete global.web3.currentProvider.sendAsync;
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}
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// if connection is 'ipcProviderWrapper', add subscription support
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if (!global.web3.currentProvider.on &&
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global.web3.currentProvider.connection &&
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global.web3.currentProvider.connection.constructor.name === 'ipcProviderWrapper') {
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global.web3.currentProvider.on = function (type, callback) {
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if (typeof callback !== 'function')
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throw new Error('The second parameter callback must be a function.');
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switch (type) {
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case 'data':
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this.connection.on('data', function (data) {
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var result = '';
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data = data.toString();
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try {
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result = JSON.parse(data);
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}
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catch (e) {
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return callback(new Error('Couldn\'t parse response data' + data));
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}
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// notification
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if (!result.id && result.method.indexOf('_subscription') !== -1) {
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callback(null, result);
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}
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});
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break;
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default:
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this.connection.on(type, callback);
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break;
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}
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};
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}
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givenProvider = global.web3.currentProvider;
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}
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/* jshint ignore:end */
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module.exports = givenProvider;
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