feat: internalize owner

src/Blue.sol

@@ -7,8 +7,6 @@ import {IOracle} from "src/interfaces/IOracle.sol";
 import {MathLib} from "src/libraries/MathLib.sol";
 import {SafeTransferLib} from "src/libraries/SafeTransferLib.sol";
 
-import {Ownable} from "src/Ownable.sol";
-
 uint constant WAD = 1e18;
 
 uint constant alpha = 0.5e18;
@@ -31,12 +29,14 @@ function irm(uint utilization) pure returns (uint) {
     return utilization / 365 days;
 }
 
-contract Blue is Ownable {
+contract Blue {
     using MathLib for uint;
     using SafeTransferLib for IERC20;
 
     // Storage.
 
+    // Owner.
+    address public owner;
     // User' supply balances.
     mapping(Id => mapping(address => uint)) public supplyShare;
     // User' borrow balances.
@@ -54,7 +54,24 @@ contract Blue is Ownable {
     // Interests last update (used to check if a market has been created).
     mapping(Id => uint) public lastUpdate;
 
-    constructor(address owner) Ownable(owner) {}
+    // Constructor.
+
+    constructor(address newOwner) {
+        owner = newOwner;
+    }
+
+    // Modifiers.
+
+    modifier onlyOwner() {
+        require(msg.sender == owner, "not owner");
+        _;
+    }
+
+    // Only owner functions.
+
+    function transferOwnership(address newOwner) external onlyOwner {
+        owner = newOwner;
+    }
 
     // Markets management.