test: add pegout payer contract

contracts/test/PegOutPayer.sol

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.18;
+
+import "../LiquidityBridgeContractV2.sol";
+import "../QuotesV2.sol";
+
+contract PegOutPayer {
+
+    event Deposit(address indexed sender, uint256 amount);
+    event PegOutPaid(QuotesV2.PegOutQuote quote, address indexed caller);
+    event Withdraw(address indexed owner, uint256 amount);
+
+    LiquidityBridgeContractV2 public immutable lbc;
+    address public immutable owner;
+
+    constructor(address payable _lbc) {
+        lbc = LiquidityBridgeContractV2(_lbc);
+        owner = msg.sender;
+    }
+
+
+    receive() external payable {
+        emit Deposit(msg.sender, msg.value);
+    }
+
+    function executePegOut(QuotesV2.PegOutQuote memory quote, bytes memory signature) external {
+        uint256 total = quote.value + quote.gasFee + quote.callFee + quote.productFeeAmount;
+        require(total <= address(this).balance, "Insufficient balance in contract");
+        lbc.depositPegout{value: total}(quote, signature);
+        emit PegOutPaid(quote, msg.sender);
+    }
+
+    function withdraw(uint256 amount) external {
+        require(msg.sender == owner, "Only owner can withdraw");
+        require(amount <= address(this).balance, "Insufficient balance in contract");
+        (bool sent, ) = payable(owner).call{value: amount}("");
+        require(sent, "Failed to withdraw funds");
+        emit Withdraw(owner, amount);
+    }
+}