feat: depositWithPermit in ERC20 zappers

contracts/interfaces/zappers/IERC20Zapper.sol

@@ -6,7 +6,21 @@ pragma solidity ^0.8.17;
 interface IERC20Zapper {
     function deposit(uint256 tokenInAmount, address receiver) external returns (uint256 tokenOutAmount);
 
+    function depositWithPermit(uint256 tokenInAmount, address receiver, uint256 deadline, uint8 v, bytes32 r, bytes32 s)
+        external
+        returns (uint256 tokenOutAmount);
+
     function depositWithReferral(uint256 tokenInAmount, address receiver, uint256 referralCode)
         external
         returns (uint256 tokenOutAmount);
+
+    function depositWithReferralAndPermit(
+        uint256 tokenInAmount,
+        address receiver,
+        uint256 referralCode,
+        uint256 deadline,
+        uint8 v,
+        bytes32 r,
+        bytes32 s
+    ) external returns (uint256 tokenOutAmount);
 }

contracts/zappers/ERC20DepositZapper.sol

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// Gearbox Protocol. Generalized leverage for DeFi protocols
+// (c) Gearbox Foundation, 2023.
+pragma solidity ^0.8.17;
+
+import {DepositTrait} from "./traits/DepositTrait.sol";
+import {ERC20Trait} from "./traits/ERC20Trait.sol";
+import {ZapperBase} from "./ZapperBase.sol";
+
+/// @title ERC20 deposit zapper
+/// @notice Zapper that allows to deposit an ERC20 token into a pool in one call using permit
+contract ERC20DepositZapper is ERC20Trait, DepositTrait {
+    constructor(address pool) ZapperBase(pool) {}
+}

contracts/zappers/ERC20ZapperBase.sol

@@ -3,6 +3,7 @@
 // (c) Gearbox Foundation, 2023.
 pragma solidity ^0.8.17;
 
+import {IERC20Permit} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";
 import {ZapperBase} from "./ZapperBase.sol";
 import {IERC20Zapper} from "../interfaces/zappers/IERC20Zapper.sol";
 
@@ -18,11 +19,43 @@ abstract contract ERC20ZapperBase is ZapperBase, IERC20Zapper {
         tokenOutAmount = _deposit(tokenInAmount, receiver, false, 0);
     }
 
+    /// @notice Performs deposit zap using signed EIP-2612 permit message for input token:
+    ///         - receives `tokenInAmount` of `tokenIn` from `msg.sender` and converts it to `underlying`
+    ///         - deposits `underlying` into `pool`
+    ///         - converts `pool`'s shares to `tokenOutAmount` of `tokenOut` and sends it to `receiver`
+    /// @dev `v`, `r`, `s` must be a valid signature of the permit message from `msg.sender` for `tokenIn` to this contract
+    function depositWithPermit(uint256 tokenInAmount, address receiver, uint256 deadline, uint8 v, bytes32 r, bytes32 s)
+        external
+        returns (uint256 tokenOutAmount)
+    {
+        _permitTokenIn(tokenInAmount, deadline, v, r, s);
+        tokenOutAmount = _deposit(tokenInAmount, receiver, false, 0);
+    }
+
     /// @notice Same as `deposit` but allows specifying the `referralCode` when depositing into the pool
     function depositWithReferral(uint256 tokenInAmount, address receiver, uint256 referralCode)
         external
         returns (uint256 tokenOutAmount)
     {
         tokenOutAmount = _deposit(tokenInAmount, receiver, true, referralCode);
     }
+
+    /// @notice Same as `depositWithPermit` but allows specifying the `referralCode` when depositing into the pool
+    function depositWithReferralAndPermit(
+        uint256 tokenInAmount,
+        address receiver,
+        uint256 referralCode,
+        uint256 deadline,
+        uint8 v,
+        bytes32 r,
+        bytes32 s
+    ) external returns (uint256 tokenOutAmount) {
+        _permitTokenIn(tokenInAmount, deadline, v, r, s);
+        tokenOutAmount = _deposit(tokenInAmount, receiver, true, referralCode);
+    }
+
+    /// @dev Executes `tokenIn` permit from `msg.sender` to this contract
+    function _permitTokenIn(uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s) internal {
+        try IERC20Permit(tokenIn()).permit(msg.sender, address(this), amount, deadline, v, r, s) {} catch {}
+    }
 }