added _disableInitializers() in Bridge's constructor

.gitmodules

@@ -1,6 +1,9 @@
-[submodule "apps/blockchain/contracts/ethereum/lib/forge-std"]
-	path = apps/blockchain/ethereum/lib/forge-std
-	url = https://github.com/foundry-rs/forge-std
-[submodule "apps/blockchain/contracts/ethereum/lib/openzeppelin-contracts"]
-	path = apps/blockchain/ethereum/lib/openzeppelin-contracts
-	url = https://github.com/OpenZeppelin/openzeppelin-contracts
+[submodule "apps/blockchain/contracts/ethereum/lib/forge-std"]
+	path = apps/blockchain/ethereum/lib/forge-std
+	url = https://github.com/foundry-rs/forge-std
+[submodule "apps/blockchain/contracts/ethereum/lib/openzeppelin-contracts"]
+	path = apps/blockchain/ethereum/lib/openzeppelin-contracts
+	url = https://github.com/OpenZeppelin/openzeppelin-contracts
+[submodule "apps/blockchain/ethereum/lib/openzeppelin-contracts-upgradeable"]
+	path = apps/blockchain/ethereum/lib/openzeppelin-contracts-upgradeable
+	url = https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable

apps/blockchain/ethereum/src/Bridge.sol

@@ -15,6 +15,7 @@ import "./UUPSProxied.sol";
 import "starknet/IStarknetMessaging.sol";
 
 import "./IStarklaneEvent.sol";
+import "openzeppelin-contracts-upgradeable/contracts/proxy/utils/Initializable.sol";
 
 error NotSupportedYetError();
 error CollectionMappingError();
@@ -36,7 +37,8 @@ contract Starklane is
     StarklaneState,
     StarklaneEscrow,
     StarklaneMessaging,
-    CollectionManager
+    CollectionManager,
+    Initializable
 {
     // Mapping (collectionAddress => bool)
     mapping(address => bool) _whiteList;
@@ -47,19 +49,29 @@ contract Starklane is
 // Using an arbitrary gas value here for L1-L2 messaging fees, adjustable as network conditions evolve.
 // This value serves as a flexible baseline, allowing for real-time adjustments to reflect gas changes.
     uint256 _minimumGasFee = 5e13;// 0.00005 ETH
+    /**
+     * @notice Starklane contract constructor.
+     * 
+     * @dev Makes the contract initializable only once
+     */ 
+
+    constructor() {
+        _disableInitializers();
+    }
 
     /**
      * @notice Initializes the implementation, only callable once.
      *
      *    @param data Data to init the implementation.
      */
-    function initialize(bytes calldata data) public onlyInit {
+    function initialize(bytes calldata data) public initializer {
         (
             address owner,
             IStarknetMessaging starknetCoreAddress,
             uint256 starklaneL2Address,
             uint256 starklaneL2Selector
         ) = abi.decode(data, (address, IStarknetMessaging, uint256, uint256));
+
         _enabled = false;
         _starknetCoreAddress = starknetCoreAddress;
 

apps/blockchain/ethereum/test/Bridge.t.sol

@@ -3,6 +3,7 @@ pragma solidity ^0.8.0;
 
 import "openzeppelin-contracts/contracts/token/ERC721/IERC721.sol";
 import "openzeppelin-contracts/contracts/token/ERC1155/IERC1155.sol";
+import "openzeppelin-contracts-upgradeable/contracts/proxy/utils/Initializable.sol";
 
 import "forge-std/Test.sol";
 import "../src/IStarklane.sol";
@@ -55,6 +56,24 @@ contract BridgeTest is Test, IStarklaneEvent {
         IStarklane(bridge).enableBridge(true);
     }
 
+    //
+    function test_initializersDisabled() public {
+        // Deploy a new instance of Starklane
+        Starklane newStarklane = new Starklane();
+
+        // Try to initialize the contract directly
+        bytes memory initData = abi.encode(
+            address(this),
+            address(0),  // Mock Starknet Core address
+            uint256(0),  // Mock Starklane L2 address
+            uint256(0)   // Mock Starklane L2 selector
+        );
+
+        // Expect the initialization to revert
+        vm.expectRevert(Initializable.InvalidInitialization.selector);
+        newStarklane.initialize(initData);
+    }
+
     //
     function testFail_invalidIds() public {
         uint256[] memory ids = new uint256[](0);