feat: added withdraw USDC from vault scripts

Author: dannweeeee

README.md

@@ -15,19 +15,19 @@
 1. Registry.sol
 
 ```
-forge script script/deploy/Registry.s.sol:DeployRegistry --rpc-url <PRC_URL> --broadcast 
+forge script script/deploy/Registry.s.sol:DeployRegistry --rpc-url <PRC_URL> --broadcast
 ```
 
 2. Exchange.sol
 
 ```
-forge script script/deploy/Exchange.s.sol:DeployExchange --rpc-url <PRC_URL> --broadcast 
+forge script script/deploy/Exchange.s.sol:DeployExchange --rpc-url <PRC_URL> --broadcast
 ```
 
 3. Vault.sol
 
 ```
-forge script script/deploy/Vault.s.sol:DeployVault --rpc-url <PRC_URL> --broadcast 
+forge script script/deploy/Vault.s.sol:DeployVault --rpc-url <PRC_URL> --broadcast
 ```
 
 4. XSGD.sol
@@ -61,3 +61,23 @@ forge script script/actions/removeMerchant.s.sol:RemoveMerchant --rpc-url <RPC_U
 ```
 forge script script/actions/addMerchant.s.sol:AddMerchant --rpc-url <RPC_URL> --broadcast
 ```
+
+### Withdraw USDC From Vault
+
+#### Check Shares
+
+```
+forge script script/actions/withdrawUSDCFromVault.s.sol:WithdrawUSDCFromVault --sig "checkShares(address,address)" <EXCHANGE_ADDRESS> <MERCHANT_ADDRESS> --rpc-url <RPC_URL>
+```
+
+#### Convert Shares to Assets
+
+```
+forge script script/actions/withdrawUSDCFromVault.s.sol:WithdrawUSDCFromVault --sig "convertSharesToAssets(address,uint256)" <EXCHANGE_ADDRESS> <SHARES> --rpc-url <RPC_URL>
+```
+
+#### Withdraw USDC From Vault
+
+```
+forge script script/actions/withdrawUSDCFromVault.s.sol:WithdrawUSDCFromVault --sig "run(address,uint256)" <EXCHANGE_ADDRESS> <SHARES> --rpc-url <RPC_URL> --broadcast
+```

script/actions/withdrawUSDCFromVault.s.sol

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import {Script} from "forge-std/Script.sol";
+import {Exchange} from "../../src/Exchange.sol";
+import {IERC4626} from "@openzeppelin/contracts/interfaces/IERC4626.sol";
+import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+
+contract WithdrawUSDCFromVault is Script {
+    function run(address exchangeAddress, uint256 sharesToWithdraw) external {
+        // Ensure the private key is set in the environment
+        uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY");
+
+        // Start broadcasting transactions
+        vm.startBroadcast(deployerPrivateKey);
+
+        // Get the Exchange contract instance
+        Exchange exchange = Exchange(exchangeAddress);
+
+        // Get the vault address
+        IERC4626 vault = exchange.vault();
+
+        // First approve the Exchange contract to spend your vault shares
+        IERC20(address(vault)).approve(exchangeAddress, sharesToWithdraw);
+
+        // Then call withdrawToWallet function
+        exchange.withdrawToWallet(sharesToWithdraw);
+
+        vm.stopBroadcast();
+    }
+
+    // Helper function to check how many shares you have
+    function checkShares(address exchangeAddress, address walletAddress) external view returns (uint256) {
+        Exchange exchange = Exchange(exchangeAddress);
+        IERC4626 vault = exchange.vault();
+        return vault.balanceOf(walletAddress);
+    }
+
+    // Helper function to convert shares to assets (USDC)
+    function convertSharesToAssets(address exchangeAddress, uint256 shares) external view returns (uint256) {
+        Exchange exchange = Exchange(exchangeAddress);
+        IERC4626 vault = exchange.vault();
+        return vault.convertToAssets(shares);
+    }
+}