new ethereum.js

2015-01-28 10:58:43 +01:00
parent 8c99a87aa8
commit cb47a9e97f
34 changed files with 4018 additions and 0 deletions
--- a/cmd/mist/assets/ext/lib/providermanager.js
+++ b/cmd/mist/assets/ext/lib/providermanager.js
@@ -0,0 +1,110 @@
+/*
+    This file is part of ethereum.js.
+
+    ethereum.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.
+
+    ethereum.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 ethereum.js.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file providermanager.js
+ * @authors:
+ *   Jeffrey Wilcke <jeff@ethdev.com>
+ *   Marek Kotewicz <marek@ethdev.com>
+ *   Marian Oancea <marian@ethdev.com>
+ *   Gav Wood <g@ethdev.com>
+ * @date 2014
+ */
+
+var web3 = require('./web3'); // jshint ignore:line
+
+/**
+ * Provider manager object prototype
+ * It's responsible for passing messages to providers
+ * If no provider is set it's responsible for queuing requests
+ * It's also responsible for polling the ethereum node for incoming messages
+ * Default poll timeout is 12 seconds
+ * If we are running ethereum.js inside ethereum browser, there are backend based tools responsible for polling,
+ * and provider manager polling mechanism is not used
+ */
+var ProviderManager = function() {
+    this.polls = [];
+    this.provider = undefined;
+    this.id = 1;
+
+    var self = this;
+    var poll = function () {
+        if (self.provider) {
+            self.polls.forEach(function (data) {
+                data.data._id = self.id;
+                self.id++;
+                var result = self.provider.send(data.data);
+            
+                result = JSON.parse(result);
+                
+                // dont call the callback if result is not an array, or empty one
+                if (result.error || !(result.result instanceof Array) || result.result.length === 0) {
+                    return;
+                }
+
+                data.callback(result.result);
+            });
+        }
+        setTimeout(poll, 1000);
+    };
+    poll();
+};
+
+/// sends outgoing requests
+ProviderManager.prototype.send = function(data) {
+
+    data.args = data.args || [];
+    data._id = this.id++;
+
+    if (this.provider === undefined) {
+        console.error('provider is not set');
+        return null; 
+    }
+
+    //TODO: handle error here? 
+    var result = this.provider.send(data);
+    result = JSON.parse(result);
+
+    if (result.error) {
+        console.log(result.error);
+        return null;
+    }
+
+    return result.result;
+};
+
+/// setups provider, which will be used for sending messages
+ProviderManager.prototype.set = function(provider) {
+    this.provider = provider;
+};
+
+/// this method is only used, when we do not have native qt bindings and have to do polling on our own
+/// should be callled, on start watching for eth/shh changes
+ProviderManager.prototype.startPolling = function (data, pollId, callback) {
+    this.polls.push({data: data, id: pollId, callback: callback});
+};
+
+/// should be called to stop polling for certain watch changes
+ProviderManager.prototype.stopPolling = function (pollId) {
+    for (var i = this.polls.length; i--;) {
+        var poll = this.polls[i];
+        if (poll.id === pollId) {
+            this.polls.splice(i, 1);
+        }
+    }
+};
+
+module.exports = ProviderManager;
+