Add NovaVault and interfaces

src/NovaVault.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+import {Errors} from "./libraries/Errors.sol";
+import {INovaVault} from "./interfaces/INovaVault.sol";
+import {INovaAdapterBase} from "./interfaces/INovaAdapterBase.sol";
+
+contract NovaVault is INovaVault {
+    mapping(address => address) public _novaAdapters;
+
+    function constructor(
+        address[] calldata stables,
+        address[] calldata novaAdapters
+    ) {
+        _approveNovaAdapters(stables, novaAdapters);
+    }
+
+    function _approveNovaAdapters(
+        address[] calldata stables,
+        address[] calldata novaAdapters,
+    ) internal {
+        require(
+            stables.length == novaAdapters.length,
+            Errors.MISMATCHING_ARRAYS_LENGTH
+        );
+        for (uint256 i = 0; i < stables.length; i++) {
+            _approveAdapter(stables[i], novaAdapters[i]);
+        }
+    }
+
+    function _approveAdapter(
+        address stable,
+        address adapter
+    ) internal  {
+        require(stable != address(0), Errors.INVALID_ADDRESS);
+
+        require(
+            _novaAdapters[stable] == address(0),
+            Errors.ADAPTER_ALREADY_APPROVED
+        );
+
+        ERC20 underlyingAsset = INovaAdapterBase(adapter).asset();
+        require(
+            address(underlyingAsset) == stable,
+            Errors.INVALID_STABLE_TO_ADAPTER_MAPPING
+        );
+
+        _novaAdapters[stable] = adapter;
+        emit ApprovedAdapter(stable, adapter);
+    }
+
+    function deposit(address stable, uint256 assets) external returns (bool , bytes memory) {
+        address adapter = _novaAdapters[stable];
+        require(
+            adapter != address(0),
+            Errors.NO_ADAPTER_APPROVED
+        );
+        (bool success, bytes memory data) = adapter.delegatecall(
+            abi.encodeWithSignature("deposit(uint256)", assets)
+        );
+        return (success, data)
+    }
+
+    function withdraw(address stable, uint256 shares) external returns (bool , bytes memory) {
+        address adapter = _novaAdapters[stable];
+        require(
+            adapter != address(0),
+            Errors.NO_ADAPTER_APPROVED
+        );
+        (bool success, bytes memory data) = adapter.delegatecall(
+            abi.encodeWithSignature("withdraw(uint256)", shares)
+        );
+        return (success, data)
+    }
+}

src/interfaces/INovaAdapterBase.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+import {ERC20} from "@solmate/tokens/ERC20.sol";
+
+interface INovaAdapterBase {
+    function asset() external view returns (ERC20);
+    function deposit(uint256 assets) external returns (bool , uint256);
+    function withdraw(uint256 shares) external returns (bool, uint256);
+}

src/interfaces/INovaVault.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+interface INovaVault {
+    event ApprovedAdapter(address stable, address adapter);
+}

src/librairies/Errors.sol

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+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+
+library Errors {
+    string public constant INVALID_ADDRESS = "1";
+    string public constant ADAPTER_ALREADY_APPROVED = "2";
+    string public constant MISMATCHING_ARRAYS_LENGTH = "3";
+    string public constant INVALID_STABLE_TO_ADAPTER_MAPPING = "4";
+    string public constant NO_ADAPTER_APPROVED = "5";
+}