skel

contracts/StakeManager.sol

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.6.12;
+
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract StakeManager is ERC20 {
+
+    address stakedToken;
+    
+    bytes32 vaultCodehash;
+
+    mapping (address => Account) account;
+
+
+    modifier onlyVault {
+        require(msg.sender.codehash() == vaultCodehash, "Unauthorized Codehash");
+    }
+
+    function join(uint256 amount) external onlyVault {
+        stakedToken.transferFrom(msg.sender, )
+    }
+
+    function lock(uint256 amount, uint256 time) external onlyVault {
+        
+    }
+
+    function joinAndLock(uint256 amount, uint256 time) external onlyVault {
+
+    }
+
+    function leave(uint256 amount) external {
+
+    }
+
+
+
+
+}

contracts/StakeVault.sol

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity 0.6.12;
+
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract StakeVault {
+    address owner;
+    address stakeManager;
+
+    ERC20 stakedToken;
+    uint256 balance;
+    uint256 locked;
+    uint256 multiplier;
+
+
+    function join(uint256 amount) external {
+        stakedToken.transferFrom(msg.sender, address(this), amount);
+    }
+
+    function lock(uint256 amount, uint256 time) external {
+        
+    }
+
+    function joinAndLock(uint256 amount, uint256 time) external {
+
+    }
+
+    function leave(uint256 amount) external {
+
+    }
+
+
+
+
+}