diff --git a/doc/Specifications.md b/doc/Specifications.md
deleted file mode 100644
index 6fd2352d2264c193b3e67ff5f33bc27276e2df33..0000000000000000000000000000000000000000
--- a/doc/Specifications.md
+++ /dev/null
@@ -1,21 +0,0 @@
-# Specifications
-
-## Client-side concepts
-
-### Account
- * An account is a PGP Key
- * An account can be a member of multiple communities
- * An account own at least one wallet for each currency he owns
- * An account can own multiple wallets of the same currency
- * An account must declare the nodes he trusts to receive transactions
- * An account must declare the nodes he uses to send transactions for a currency type
-
-### Community
- * A community uses one unique currency
- * A community has members
- * Each members of the community can issue currency following the rule defined in the community amendment
-
-### Wallets
- * Wallets can own only one type of currency
- * Wallets value are the sum of the transactions received and sent that the user listed in this wallet
- 
\ No newline at end of file
diff --git a/doc/cutecoint_concept.ui b/doc/cutecoint_concept.ui
deleted file mode 100644
index 825a9fa8d565bee64a4c6b5ef09772ff470a91b8..0000000000000000000000000000000000000000
--- a/doc/cutecoint_concept.ui
+++ /dev/null
@@ -1,324 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<ui version="4.0">
- <class>MainWindow</class>
- <widget class="QMainWindow" name="MainWindow">
-  <property name="geometry">
-   <rect>
-    <x>0</x>
-    <y>0</y>
-    <width>452</width>
-    <height>400</height>
-   </rect>
-  </property>
-  <property name="windowTitle">
-   <string notr="true">CuteCoin</string>
-  </property>
-  <widget class="QWidget" name="centralwidget">
-   <layout class="QHBoxLayout" name="horizontalLayout_2">
-    <item>
-     <widget class="QFrame" name="actionsFrame">
-      <property name="frameShape">
-       <enum>QFrame::StyledPanel</enum>
-      </property>
-      <property name="frameShadow">
-       <enum>QFrame::Raised</enum>
-      </property>
-      <layout class="QVBoxLayout" name="verticalLayout">
-       <item>
-        <widget class="QTabWidget" name="tabWidget">
-         <property name="currentIndex">
-          <number>0</number>
-         </property>
-         <widget class="QWidget" name="walletsTab">
-          <attribute name="title">
-           <string>Wallets</string>
-          </attribute>
-          <layout class="QHBoxLayout" name="horizontalLayout">
-           <item>
-            <widget class="QListWidget" name="listWidget_2">
-             <item>
-              <property name="text">
-               <string>Main wallet (uCoins)</string>
-              </property>
-             </item>
-             <item>
-              <property name="text">
-               <string>Freecoins wallet (freeCoins)</string>
-              </property>
-             </item>
-            </widget>
-           </item>
-           <item>
-            <widget class="QListWidget" name="listWidget_3">
-             <item>
-              <property name="text">
-               <string>+10</string>
-              </property>
-             </item>
-             <item>
-              <property name="text">
-               <string>-100</string>
-              </property>
-             </item>
-             <item>
-              <property name="text">
-               <string>-30</string>
-              </property>
-             </item>
-             <item>
-              <property name="text">
-               <string>+300</string>
-              </property>
-             </item>
-            </widget>
-           </item>
-          </layout>
-         </widget>
-         <widget class="QWidget" name="transactionsTab">
-          <attribute name="title">
-           <string>Transactions</string>
-          </attribute>
-          <layout class="QHBoxLayout" name="horizontalLayout_3">
-           <item>
-            <layout class="QVBoxLayout" name="verticalLayout_3">
-             <item>
-              <widget class="QLabel" name="label">
-               <property name="text">
-                <string>Sent</string>
-               </property>
-              </widget>
-             </item>
-             <item>
-              <widget class="QListWidget" name="listWidget">
-               <item>
-                <property name="text">
-                 <string>100 to Caner Candan (0x5D2662E0F300EBAD)</string>
-                </property>
-               </item>
-               <item>
-                <property name="text">
-                 <string>30 to cgeek twicedd (0x399EB3415C237F93)</string>
-                </property>
-               </item>
-              </widget>
-             </item>
-            </layout>
-           </item>
-           <item>
-            <layout class="QVBoxLayout" name="verticalLayout_2">
-             <item>
-              <widget class="QLabel" name="label_2">
-               <property name="text">
-                <string>Received</string>
-               </property>
-              </widget>
-             </item>
-             <item>
-              <widget class="QListWidget" name="listWidget_4">
-               <item>
-                <property name="text">
-                 <string>10 from Caner Candan  (0x5D2662E0F300EBAD)</string>
-                </property>
-               </item>
-              </widget>
-             </item>
-            </layout>
-           </item>
-          </layout>
-         </widget>
-         <widget class="QWidget" name="communitiesTab">
-          <attribute name="title">
-           <string>Communities</string>
-          </attribute>
-          <layout class="QHBoxLayout" name="horizontalLayout_4">
-           <item>
-            <widget class="QTabWidget" name="tabWidget_2">
-             <property name="currentIndex">
-              <number>1</number>
-             </property>
-             <widget class="QWidget" name="ucoinTab">
-              <attribute name="title">
-               <string>Ucoin</string>
-              </attribute>
-             </widget>
-             <widget class="QWidget" name="freecoinTab">
-              <attribute name="title">
-               <string>FreeCoin</string>
-              </attribute>
-              <layout class="QHBoxLayout" name="horizontalLayout_5">
-               <item>
-                <layout class="QVBoxLayout" name="verticalLayout_4">
-                 <item>
-                  <widget class="QLabel" name="label_3">
-                   <property name="text">
-                    <string>Members</string>
-                   </property>
-                  </widget>
-                 </item>
-                 <item>
-                  <widget class="QListWidget" name="listWidget_5">
-                   <item>
-                    <property name="text">
-                     <string>Mister K</string>
-                    </property>
-                   </item>
-                   <item>
-                    <property name="text">
-                     <string>Another guy</string>
-                    </property>
-                   </item>
-                   <item>
-                    <property name="text">
-                     <string>Inso sonI</string>
-                    </property>
-                   </item>
-                  </widget>
-                 </item>
-                </layout>
-               </item>
-               <item>
-                <layout class="QVBoxLayout" name="verticalLayout_5">
-                 <item>
-                  <widget class="QLabel" name="label_4">
-                   <property name="text">
-                    <string>Last issuance</string>
-                   </property>
-                  </widget>
-                 </item>
-                 <item>
-                  <widget class="QListWidget" name="listWidget_6">
-                   <item>
-                    <property name="text">
-                     <string>110 (27/12/2014)</string>
-                    </property>
-                   </item>
-                   <item>
-                    <property name="text">
-                     <string>140 (27/01/2015)</string>
-                    </property>
-                   </item>
-                   <item>
-                    <property name="text">
-                     <string>190 (27/02/2015)</string>
-                    </property>
-                   </item>
-                  </widget>
-                 </item>
-                </layout>
-               </item>
-              </layout>
-             </widget>
-            </widget>
-           </item>
-          </layout>
-         </widget>
-        </widget>
-       </item>
-      </layout>
-     </widget>
-    </item>
-   </layout>
-  </widget>
-  <widget class="QMenuBar" name="menubar">
-   <property name="geometry">
-    <rect>
-     <x>0</x>
-     <y>0</y>
-     <width>452</width>
-     <height>20</height>
-    </rect>
-   </property>
-   <widget class="QMenu" name="menuTr_File">
-    <property name="title">
-     <string>Account</string>
-    </property>
-    <addaction name="actionChange_account"/>
-    <addaction name="actionManage_accounts"/>
-    <addaction name="actionConfigure_trustable_nodes"/>
-   </widget>
-   <widget class="QMenu" name="menuEdit">
-    <property name="title">
-     <string>Contacts</string>
-    </property>
-    <widget class="QMenu" name="menuCaner_Candan">
-     <property name="title">
-      <string>Caner Candan</string>
-     </property>
-     <addaction name="separator"/>
-     <addaction name="actionSend_a_message"/>
-     <addaction name="actionSend_money"/>
-     <addaction name="separator"/>
-     <addaction name="actionRemove_contact"/>
-    </widget>
-    <widget class="QMenu" name="menuCGeek">
-     <property name="title">
-      <string>cGeek</string>
-     </property>
-     <addaction name="actionSend_a_message_2"/>
-     <addaction name="actionSend_money_2"/>
-     <addaction name="separator"/>
-     <addaction name="actionRemove_contact_2"/>
-    </widget>
-    <addaction name="menuCaner_Candan"/>
-    <addaction name="menuCGeek"/>
-    <addaction name="separator"/>
-    <addaction name="actionAdd_a_contact"/>
-   </widget>
-   <addaction name="menuTr_File"/>
-   <addaction name="menuEdit"/>
-  </widget>
-  <widget class="QStatusBar" name="statusbar"/>
-  <action name="actionChange_account">
-   <property name="text">
-    <string>Change account</string>
-   </property>
-  </action>
-  <action name="actionManage_accounts">
-   <property name="text">
-    <string>Manage accounts</string>
-   </property>
-  </action>
-  <action name="actionConfigure_trustable_nodes">
-   <property name="text">
-    <string>Configure trustable nodes</string>
-   </property>
-  </action>
-  <action name="actionAdd_a_contact">
-   <property name="text">
-    <string>Add a contact</string>
-   </property>
-  </action>
-  <action name="actionSend_a_message">
-   <property name="text">
-    <string>Send a message</string>
-   </property>
-  </action>
-  <action name="actionSend_money">
-   <property name="text">
-    <string>Send money</string>
-   </property>
-  </action>
-  <action name="actionRemove_contact">
-   <property name="text">
-    <string>Remove contact</string>
-   </property>
-  </action>
-  <action name="actionSend_a_message_2">
-   <property name="text">
-    <string>Send a message</string>
-   </property>
-  </action>
-  <action name="actionSend_money_2">
-   <property name="text">
-    <string>Send money</string>
-   </property>
-  </action>
-  <action name="actionRemove_contact_2">
-   <property name="text">
-    <string>Remove contact</string>
-   </property>
-  </action>
- </widget>
- <resources/>
- <connections/>
-</ui>
diff --git a/doc/uml/models.png b/doc/uml/models.png
deleted file mode 100644
index a4314ae24e7027f32e61959c854ac9f5ceb327ba..0000000000000000000000000000000000000000
Binary files a/doc/uml/models.png and /dev/null differ
diff --git a/doc/uml/models.pu b/doc/uml/models.pu
deleted file mode 100644
index 82a546ca685ae3669e1d4a6a893d90b8a7bb38f8..0000000000000000000000000000000000000000
--- a/doc/uml/models.pu
+++ /dev/null
@@ -1,46 +0,0 @@
-@startuml
-
-#TODO: Rework UML with all informations gathered lately
-
-class Account {
-	pgpkey
-}
-
-Account --> "0..*" Community : is a member of
-Account --> "0..*" Node : trusts
-Account --> "0..*" Node : send transactions with
-Account --> "*" Transaction : send
-Account --> "*" Transaction : receive
-Account --> "0..*" Wallet : owns
-
-class Community {
-}
-
-Community "1" -- "1" Currency : uses
-Community "1" --> "1..*" Node : known nodes
-
-class Node {
-	address
-	port
-	auth
-}
-
-Node --> "1" Community
-
-class Transaction {
-	value
-	currency
-	sender
-	receiver
-}
-
-class Wallet {
-	currency
-	coins
-}
-
-
-
-@enduml
-
-
diff --git a/doc/uml/tx_lifecycle.png b/doc/uml/tx_lifecycle.png
new file mode 100644
index 0000000000000000000000000000000000000000..0e7061b3438870f7c6a7c4fae11a191f971e9234
Binary files /dev/null and b/doc/uml/tx_lifecycle.png differ
diff --git a/doc/uml/tx_lifecycle.pu b/doc/uml/tx_lifecycle.pu
new file mode 100644
index 0000000000000000000000000000000000000000..c8e9c700e198ed309be36ea67026af65fde6d0fa
--- /dev/null
+++ b/doc/uml/tx_lifecycle.pu
@@ -0,0 +1,10 @@
+@startuml
+
+[*] --> To_send
+To_send --> Awaiting : Broadcasted at B
+Awaiting --> Validated : Registered in [B; B+15]
+Awaiting --> Canceled : Not registered in [B; B+15]
+Canceled --> To_send : Send back order
+Canceled --> Dropped : Drop order
+
+@enduml
\ No newline at end of file
diff --git a/src/cutecoin/core/wallet.py b/src/cutecoin/core/wallet.py
index 87121814f28c0488d74996118a8eada4336da217..925da2a997ada03157861c43e8496b047309f729 100644
--- a/src/cutecoin/core/wallet.py
+++ b/src/cutecoin/core/wallet.py
@@ -19,14 +19,15 @@ class Cache():
         self.wallet = wallet
 
         self.tx_sent = []
-        self.awaiting_tx = []
+        self.tx_awaiting = []
         self.tx_received = []
+        self.tx_to_send = []
         self.available_sources = []
 
     def load_from_json(self, data):
         self.tx_received = []
         self.tx_sent = []
-        self.awaiting_tx = []
+        self.tx_awaiting = []
         logging.debug(data)
 
         data_received = data['received']
@@ -39,7 +40,7 @@ class Cache():
 
         data_awaiting = data['awaiting']
         for s in data_awaiting:
-            self.awaiting_tx.append((r['block'], Transaction.from_signed_raw(s['raw'])))
+            self.tx_awaiting.append((r['block'], Transaction.from_signed_raw(s['raw'])))
 
         if 'sources' in data:
             data_sources = data['sources']
@@ -58,7 +59,7 @@ class Cache():
             data_sent.append({'block': r[0], 'raw': s[1].signed_raw()})
 
         data_awaiting = []
-        for s in self.awaiting_tx:
+        for s in self.tx_awaiting:
             data_awaiting.append({'block': r[0], 'raw': s[1].signed_raw()})
 
         data_sources = []
@@ -76,7 +77,7 @@ class Cache():
         return self.tx_sent
 
     def awaiting(self, community):
-        return self.awaiting_tx
+        return self.tx_awaiting
 
     def latest_received(self, community):
         return self.tx_received
@@ -117,7 +118,7 @@ class Cache():
                     if len(in_inputs) > 0:
                         # remove from waiting transactions list the one which were
                         # validated in the blockchain
-                        self.awaiting_tx = [awaiting[1] for awaiting in self.awaiting_tx
+                        self.tx_awaiting = [awaiting[1] for awaiting in self.tx_awaiting
                                              if awaiting[1].compact() != tx.compact()]
                         self.tx_sent.append((block_number, tx))
 
@@ -262,7 +263,7 @@ class Wallet(object):
             community.broadcast(bma.tx.Process,
                         post_args={'transaction': tx.signed_raw()})
             block_number = community.current_blockid()['number']
-            self.caches[community.currency].awaiting_tx.append((block_number, tx))
+            self.caches[community.currency].tx_awaiting.append((block_number, tx))
         except:
             raise