support maxpeers option

Author: iurimatias

boilerplate/config/blockchain.json

@@ -5,6 +5,7 @@
     "datadir": ".embark/development/datadir",
     "mineWhenNeeded": true,
     "nodiscover": true,
+    "maxpeers": 0,
     "rpcHost": "localhost",
     "rpcPort": 8545,
     "rpcCorsDomain": "http://localhost:8000",

demo/config/blockchain.json

@@ -5,6 +5,7 @@
     "datadir": ".embark/development/datadir",
     "mineWhenNeeded": true,
     "nodiscover": true,
+    "maxpeers": 0,
     "rpcHost": "localhost",
     "rpcPort": 8545,
     "rpcCorsDomain": "http://localhost:8000",

lib/blockchain.js

@@ -20,7 +20,8 @@ var Blockchain = function(blockchainConfig, Client) {
     nodiscover: this.blockchainConfig.nodiscover || false,
     mine: this.blockchainConfig.mine || false,
     account: this.blockchainConfig.account || {},
-    whisper: (this.blockchainConfig.whisper === undefined) || this.blockchainConfig.whisper
+    whisper: (this.blockchainConfig.whisper === undefined) || this.blockchainConfig.whisper,
+    maxpeers: this.blockchainConfig.maxpeers || 25
   };
 
   this.client = new Client({config: this.config});

lib/geth_commands.js

@@ -74,6 +74,8 @@ GethCommands.prototype.mainCommand = function(address) {
     cmd += "--nodiscover ";
   }
 
+  cmd += "--maxpeers " + config.maxpeers + " ";
+
   if (config.mineWhenNeeded || config.mine) {
     cmd += "--mine ";
   }

test/blockchain.js

@@ -22,6 +22,7 @@ describe('embark.Blockchain', function() {
           networkId: 12301,
           port: 30303,
           nodiscover: false,
+          maxpeers: 25,
           mine: false,
           whisper: true,
           account: {}
@@ -45,6 +46,7 @@ describe('embark.Blockchain', function() {
           networkId: 1,
           port: 123456,
           nodiscover: true,
+          maxpeers: 25,
           mine: true,
           whisper: false,
           account: {}