/*
This file is part of web3.js.
web3.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
web3.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with web3.js. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file givenProvider.js
* @author Fabian Vogelsteller <fabian@ethereum.org>
* @date 2017
*/
"use strict";
var givenProvider = null;
// ADD GIVEN PROVIDER
/* jshint ignore:start */
var global = typeof globalThis === 'object' ? globalThis : undefined;
if (!global) {
try {
global = Function('return this')();
}
catch (e) {
global = self;
}
}
// EIP-1193: window.ethereum
if (typeof global.ethereum !== 'undefined') {
givenProvider = global.ethereum;
// Legacy web3.currentProvider
}
else if (typeof global.web3 !== 'undefined' && global.web3.currentProvider) {
if (global.web3.currentProvider.sendAsync) {
global.web3.currentProvider.send = global.web3.currentProvider.sendAsync;
delete global.web3.currentProvider.sendAsync;
}
// if connection is 'ipcProviderWrapper', add subscription support
if (!global.web3.currentProvider.on &&
global.web3.currentProvider.connection &&
global.web3.currentProvider.connection.constructor.name === 'ipcProviderWrapper') {
global.web3.currentProvider.on = function (type, callback) {
if (typeof callback !== 'function')
throw new Error('The second parameter callback must be a function.');
switch (type) {
case 'data':
this.connection.on('data', function (data) {
var result = '';
data = data.toString();
try {
result = JSON.parse(data);
}
catch (e) {
return callback(new Error('Couldn\'t parse response data' + data));
}
// notification
if (!result.id && result.method.indexOf('_subscription') !== -1) {
callback(null, result);
}
});
break;
default:
this.connection.on(type, callback);
break;
}
};
}
givenProvider = global.web3.currentProvider;
}
/* jshint ignore:end */
module.exports = givenProvider;