diff --git a/app/services/blockchains_service.rb b/app/services/blockchains_service.rb
new file mode 100644
index 000000000..a23a10150
--- /dev/null
+++ b/app/services/blockchains_service.rb
@@ -0,0 +1,44 @@
+#coding=utf-8
+
+class BlockchainsService
+
+  # 获取用户使用过的东西
+  def get_already_things(user)
+    result = get_networkids_ports(user)
+    ps = ProjectsService.new
+    project_names = ps.get_exist_project_names user
+    result[:project_names] = project_names
+    return result
+  end
+
+  # 获取用户使用过的networkid, port
+  def get_networkids_ports(user)
+    network_ids = []
+    ports = []
+    bcs = Blockchain.find_by_sql("select network_id, port from blockchains where user_id=#{user.id}")
+    bcs.each do |bc|
+      network_ids << bc.network_id
+      ports << bc.port
+    end
+    return {:network_ids => network_ids, :ports => ports, :status => 0}
+  end
+
+  # 创建新记录
+  def create_item(project, user, params)
+    status = -1
+    blockchain = Blockchain.new
+    blockchain.genesis_content = params[:genesis_content]
+    blockchain.network_id = params[:network_id]
+    blockchain.connect_ip = params[:connect_ip]
+    blockchain.port = params[:port]
+    blockchain.enode = params[:enode]
+    blockchain.project_id = project.id
+    blockchain.user_id = user.id
+    if blockchain.save
+      status = 0
+      return status, blockchain
+    end
+    return status, nil
+  end
+
+end