[PDE-401] Yieldtoken and tests (#135)

smart-wallets/src/mocks/MockInvalidSmartWallet.sol

@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.25;
+
+contract MockInvalidSmartWallet {
+// Empty contract that will fail when called
+}

smart-wallets/src/mocks/MockYieldToken.sol

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.25;
+
+import { IAssetToken } from "../interfaces/IAssetToken.sol";
+import { YieldToken } from "../token/YieldToken.sol";
+import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+
+contract MockYieldToken is YieldToken {
+
+    constructor(
+        address owner,
+        string memory name,
+        string memory symbol,
+        IERC20 currencyToken,
+        uint8 decimals_,
+        string memory tokenURI_,
+        IAssetToken assetToken,
+        uint256 initialSupply
+    ) YieldToken(owner, name, symbol, currencyToken, decimals_, tokenURI_, assetToken, initialSupply) { }
+
+    // Expose internal functions for testing
+    function notifyDeposit(uint256 assets, uint256 shares, address controller) external {
+        _notifyDeposit(assets, shares, controller);
+    }
+
+    function notifyRedeem(uint256 assets, uint256 shares, address controller) external {
+        _notifyRedeem(assets, shares, controller);
+    }
+
+}

smart-wallets/src/token/YieldToken.sol

@@ -56,8 +56,6 @@ contract YieldToken is YieldDistributionToken, ERC4626, WalletUtils, IYieldToken
 
     /// @notice All ComponentToken requests are fungible and all have ID = 0
     uint256 private constant REQUEST_ID = 0;
-    /// @notice Base that is used to divide all price inputs in order to represent e.g. 1.000001 as 1000001e12
-    uint256 private constant _BASE = 1e18;
 
     // Events
 
@@ -85,6 +83,10 @@ contract YieldToken is YieldDistributionToken, ERC4626, WalletUtils, IYieldToken
     /// @notice Indicates a failure because the given amount is 0
     error ZeroAmount();
 
+    /// @notice Indicates a failure because the given address is 0
+    /// @param what Description of which address was zero
+    error ZeroAddress(string what);
+
     /**
      * @notice Indicates a failure because the sender is not authorized to perform the action
      * @param sender Address of the sender that is not authorized
@@ -151,6 +153,16 @@ contract YieldToken is YieldDistributionToken, ERC4626, WalletUtils, IYieldToken
         IAssetToken assetToken,
         uint256 initialSupply
     ) YieldDistributionToken(owner, name, symbol, currencyToken, decimals_, tokenURI_) ERC4626(currencyToken) {
+        if (owner == address(0)) {
+            revert ZeroAddress("owner");
+        }
+        if (address(currencyToken) == address(0)) {
+            revert ZeroAddress("currency token");
+        }
+        if (address(assetToken) == address(0)) {
+            revert ZeroAddress("asset token");
+        }
+
         if (currencyToken != assetToken.getCurrencyToken()) {
             revert InvalidCurrencyToken(currencyToken, assetToken.getCurrencyToken());
         }
@@ -310,6 +322,9 @@ contract YieldToken is YieldDistributionToken, ERC4626, WalletUtils, IYieldToken
         if (assets == 0) {
             revert ZeroAmount();
         }
+        if (receiver == address(0)) {
+            revert ZeroAddress("receiver");
+        }
         if (msg.sender != controller) {
             revert Unauthorized(msg.sender, controller);
         }
@@ -337,6 +352,9 @@ contract YieldToken is YieldDistributionToken, ERC4626, WalletUtils, IYieldToken
         if (shares == 0) {
             revert ZeroAmount();
         }
+        if (receiver == address(0)) {
+            revert ZeroAddress("receiver");
+        }
         if (msg.sender != controller) {
             revert Unauthorized(msg.sender, controller);
         }
@@ -405,6 +423,9 @@ contract YieldToken is YieldDistributionToken, ERC4626, WalletUtils, IYieldToken
         if (shares == 0) {
             revert ZeroAmount();
         }
+        if (receiver == address(0)) {
+            revert ZeroAddress("receiver");
+        }
         if (msg.sender != controller) {
             revert Unauthorized(msg.sender, controller);
         }
@@ -433,6 +454,9 @@ contract YieldToken is YieldDistributionToken, ERC4626, WalletUtils, IYieldToken
         if (assets == 0) {
             revert ZeroAmount();
         }
+        if (receiver == address(0)) {
+            revert ZeroAddress("receiver");
+        }
         if (msg.sender != controller) {
             revert Unauthorized(msg.sender, controller);
         }