diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..567609b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+build/
diff --git a/contracts/Coupon.sol b/contracts/Coupon.sol
index c84050a..15a220e 100644
--- a/contracts/Coupon.sol
+++ b/contracts/Coupon.sol
@@ -2,7 +2,7 @@
 
 // TODO
 
-pragma solidity ^0.4.12;
+pragma solidity ^0.4.23;
 
 contract Coupon {
 
diff --git a/contracts/CouponDemoRegistry.sol b/contracts/CouponDemoRegistry.sol
new file mode 100644
index 0000000..f7379fd
--- /dev/null
+++ b/contracts/CouponDemoRegistry.sol
@@ -0,0 +1,62 @@
+
+pragma solidity ^0.4.23;
+
+import "./RegistryInterface.sol";
+
+contract CouponDemoRegistry is RegistryInterface {
+
+    string public version = 'v0.2';
+
+    address owner; 
+
+    address[] issuers;
+    address[] all_campaigns;
+    
+    mapping (address => bool) public is_issuer;
+    mapping (address => bool) public is_campaign;
+    mapping (address => address[]) campaigns;
+
+    modifier onlyBy(address _account) {
+        require(msg.sender == _account);
+        _;
+    }
+    
+    constructor() public {
+        owner = msg.sender;
+    }
+
+    function add_campaign(address _a) public {
+        if (!is_issuer[msg.sender]) {
+            is_issuer[msg.sender] = true;
+            issuers.push(msg.sender);
+        }
+        all_campaigns.push(_a);
+        campaigns[msg.sender].push(_a);
+        is_campaign[_a] = true;
+    }
+
+    function get_all_count() public view returns(uint count) {
+        return all_campaigns.length;
+    }
+   
+    function get_all_campaign(uint index) public view returns(address) {
+        return all_campaigns[index];
+    }
+   
+    function get_count(address issuer) public view returns(uint count) {
+        return campaigns[issuer].length;
+    }
+   
+    function get_campaign(address issuer, uint index) public view returns(address) {
+        return campaigns[issuer][index];
+    }
+   
+    function get_mycount() public view returns(uint count) {
+        return campaigns[msg.sender].length;
+    }
+
+    function get_mycampaign(uint index) public view returns(address) {
+        return campaigns[msg.sender][index];
+    }
+
+}
diff --git a/contracts/CouponExample.sol b/contracts/CouponExample.sol
index 8d0605f..99978ae 100644
--- a/contracts/CouponExample.sol
+++ b/contracts/CouponExample.sol
@@ -1,6 +1,7 @@
 /*
     The Rouge Project - Blochain Coupon platform
     Copyright (C) 2017 Valentin D. Guillois <vdg@rouge.network>
+    Copyright (C) 2017 Christophe Le Bars <clb@rouge.network>
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU Affero General Public License as
@@ -17,15 +18,13 @@
 
     ***************************************************
 
-  WARNING : EXPERIMENTAL and NON AUDITED code.
-  only use for tests purpose (on a testnet!)
-
 */
 
 import "./StandardCoupon.sol";
 
 pragma solidity ^0.4.12;
 
+
 contract CouponExample is StandardCoupon {
 
     string public name;
diff --git a/contracts/CouponUserApprovalLib.sol b/contracts/CouponUserApprovalLib.sol
index 9da027f..1bfa4cf 100644
--- a/contracts/CouponUserApprovalLib.sol
+++ b/contracts/CouponUserApprovalLib.sol
@@ -1,4 +1,5 @@
-pragma solidity ^0.4.12;
+
+pragma solidity ^0.4.23;
 
 library CouponUserApprovalLib {
   
diff --git a/contracts/RegistryInterface.sol b/contracts/RegistryInterface.sol
new file mode 100644
index 0000000..ecc1087
--- /dev/null
+++ b/contracts/RegistryInterface.sol
@@ -0,0 +1,14 @@
+
+pragma solidity ^0.4.23;
+
+contract RegistryInterface {
+
+    function add_campaign(address _a) public;
+    function get_all_count() public view returns(uint count);
+    function get_all_campaign(uint index) public view returns(address);
+    function get_count(address issuer) public view returns(uint count);
+    function get_campaign(address issuer, uint index) public view returns(address);
+    function get_mycount() public view returns(uint count);
+    function get_mycampaign(uint index) public view returns(address);
+
+}
diff --git a/contracts/StandardCoupon.sol b/contracts/StandardCoupon.sol
index 05fd0b1..cfc3f5d 100644
--- a/contracts/StandardCoupon.sol
+++ b/contracts/StandardCoupon.sol
@@ -17,8 +17,7 @@
 
     ***************************************************
 
-  WARNING : EXPERIMENTAL and NON AUDITED code.
-  only use for tests purpose (on a testnet!)
+  WARNING : EXPERIMENTAL ALPHA code.
 
   This is main contract that encapsule the coupon workflow logic
 
@@ -27,7 +26,10 @@
 
 
 */
-pragma solidity ^0.4.12;
+
+pragma solidity ^0.4.23;
+
+import "./RegistryInterface.sol";
 
 import "./Coupon.sol";
 
@@ -64,11 +66,17 @@ contract StandardCoupon is Coupon {
   address public creator; /* Creator is set up at the contract creation */
   address public issuer; /* Issuer is now always same as creator */
 
+  address constant registry = 0xdb331368bAb3492CF366Fdc8Eb83356B40838a55;
+
   /* set up some parameters like expiration at issuance ? */
   
   function issue() atState(States.Created) onlyBy(creator) {
      state = States.Issued;
      issuer = creator; 
+
+     RegistryInterface _reg = RegistryInterface(registry);
+     _reg.add_campaign(this);
+
   }
 
   uint256 public totalCoupon;
@@ -88,7 +96,7 @@ contract StandardCoupon is Coupon {
 
   function distributeCoupon(address _to) atState(States.Issued) private returns (bool success) {
     require(_to != issuer); /* SI_10 issuer is excluded for now to simplify tests */
-    require(!hasCoupon(_to));
+    require(!hasCoupon(_to)); /* only one coupon per address (but not user) */
     if (totalFreeCoupon > 0) {
       totalFreeCoupon -= 1;
       totalAcquiredCoupon += 1;